Merge pull request 'adapter: support OpenAI streaming (SSE) in /v1/chat/completions' (#1) from feat/adapter-streaming into main

OpenCode's @ai-sdk/openai-compatible sends stream:true and would render an
empty response because the adapter always returned a single non-streaming
chat.completion JSON body. Now when stream:true, emit OpenAI-compatible SSE
chat.completion.chunk events (role, content, [DONE]) so streaming clients
render text. Non-streaming path unchanged.

Adds a local EchoServer test that exercises the streaming route end-to-end.

.appveyor.yml

@@ -1,18 +0,0 @@
-version: 1-{branch}+{build}
-
-build_script:
-  - cmd: C:\MinGW\msys\1.0\bin\make
-  - cmd: rmdir /s /q .git
-before_test:
-  - cmd: set PATH=%PATH%;C:\Program Files\erl8.3\erts-8.3\bin
-test_script:
-  - cmd: C:\MinGW\msys\1.0\bin\make --keep-going test_windows
-
-environment:
-  ELIXIR_ASSERT_TIMEOUT: 2000
-
-matrix:
-  allow_failures:
-    - platform: x86
-    - platform: x64
-    - platform: Any CPU

.formatter.exs

@@ -1,17 +0,0 @@
-[
-  inputs: [
-    "lib/*/{lib,unicode,test}/**/*.{ex,exs}",
-    "lib/*/mix.exs"
-  ],
-
-  locals_without_parens: [
-    # Formatter tests
-    assert_format: 2,
-    assert_format: 3,
-    assert_same: 1,
-    assert_same: 2,
-
-    # Errors tests
-    assert_eval_raise: 3
-  ]
-]

.gitattributes

@@ -1 +0,0 @@
-lib/elixir/test/elixir/fixtures/*.txt text eol=lf

.gitignore

@@ -1,13 +1,11 @@
+.formatter.exs
+/_build/
+/cover/
+/deps/
 /doc/
-/lib/*/ebin/
-/lib/*/_build/
-/lib/*/tmp/
-/lib/elixir/src/*_parser.erl
-/lib/elixir/test/ebin/
-/man/elixir.1
-/man/iex.1
-/Docs-v*.zip
-/Precompiled-v*.zip
-/.eunit
-.elixir.plt
+/.fetch
 erl_crash.dump
+*.ez
+n8n_openai_adapter-*.tar
+/tmp/
+/result

.travis.yml

@@ -1,41 +0,0 @@
-language: bash
-sudo: false
-
-env:
-  global:
-    - ELIXIR_ASSERT_TIMEOUT=2000
-  matrix:
-    - OTP_RELEASE=OTP-20.0
-    - OTP_RELEASE=OTP-20.1
-    - OTP_RELEASE=OTP-20.2
-    - OTP_RELEASE=OTP-20.3
-    - OTP_RELEASE=OTP-21.0
-    - OTP_RELEASE=OTP-21.1
-    - OTP_RELEASE=maint
-    - OTP_RELEASE=master
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - env: OTP_RELEASE=maint
-    - env: OTP_RELEASE=master
-
-install:
-  - wget -O otp.tar.gz https://repo.hex.pm/builds/otp/ubuntu-14.04/${OTP_RELEASE}.tar.gz
-  - mkdir -p otp
-  - tar zxf otp.tar.gz -C otp --strip-components=1
-  - otp/Install -minimal $(pwd)/otp
-  - PATH=$(pwd)/otp/bin:$PATH
-
-script:
-  - make compile
-  - rm -rf .git
-  - make test
-  - dialyzer -pa lib/elixir/ebin --build_plt --output_plt elixir.plt --apps lib/elixir/ebin/elixir.beam lib/elixir/ebin/Elixir.Kernel.beam
-
-notifications:
-  recipients:
-    - jose.valim@gmail.com
-    - eric.meadows.jonsson@gmail.com
-    - lexmag@me.com
-    - an.leopardi@gmail.com

CHANGELOG.md

@@ -1,176 +0,0 @@
-# Changelog for Elixir v1.8
-
-Elixir v1.8 comes with many improvements at the infrastructure level, improving compilation time, speeding up common patterns, and adding features around introspection of the system.
-
-## Custom struct inspections
-
-Elixir now provides a derivable implementation of the `Inspect` protocol. In a nutshell, this means it is really easy to filter data from your data structures whenever they are inspected. For example, imagine you have a user struct with security and privacy sensitive information:
-
-```elixir
-defmodule User do
-  defstruct [:id, :name, :age, :email, :encrypted_password]
-end
-```
-
-By default, if you inspect a user via `inspect(user)`, it will include all fields. This can cause fields such as `:email` and `:encrypted_password` to appear in logs, error reports, etc. You could always define a custom implementation of the `Inspect` protocol for such cases but Elixir v1.8 makes it simpler by allowing you to derive the `Inspect` protocol:
-
-```elixir
-defmodule User do
-  @derive {Inspect, only: [:id, :name, :age]}
-  defstruct [:id, :name, :age, :email, :encrypted_password]
-end
-```
-
-Now all user structs will be printed with all remaining fields collapsed:
-
-    #User<id: 1, name: "Jane", age: 33, ...>
-
-You can also pass `@derive {Inspect, except: [...]}` in case you want to keep all fields by default and exclude only some.
-
-## Time zone database support
-
-In Elixir v1.3, Elixir added four types, known as Calendar types, to work with dates and times: `Time`, `Date`, `NaiveDateTime` (without time zone) and `DateTime` (with time zone). Over the last releases we have added many enhancements to the Calendar types but the `DateTime` module always evolved at a slower pace since Elixir did not provide support for a time zone database.
-
-Elixir v1.8 now defines a `Calendar.TimeZoneDatabase` behaviour, allowing developers to bring in their own time zone databases. By defining an explicit contract for time zone behaviours, Elixir can now extend the `DateTime` API, adding functions such as `DateTime.shift_zone/3`. By default, Elixir ships with a time zone database called `Calendar.UTCOnlyTimeZoneDatabase` that only handles UTC.
-
-Other Calendar related improvements include the addition of `Date.day_of_year/1`, `Date.quarter_of_year/1`, `Date.year_of_era/1`, and `Date.day_of_era/1`.
-
-## Faster compilation and other performance improvements
-
-Due to improvements to the compiler made over the last year, Elixir v1.8 should compile code about 5% faster on average. This is yet another release where we have been able to reduce compilation times and provide a more joyful development experience to everyone.
-
-The compiler also emits more efficient code for range checks in guards (such as `x in y..z`), for charlists with interpolation (such as `'foo #{bar} baz'`), and when working with records via the `Record` module.
-
-Finally, EEx templates got their own share of optimizations, emitting more compact code that runs faster.
-
-## Improved instrumentation and ownership with `$callers`
-
-The `Task` module is one of the most common ways to spawn light-weight processes to perform work concurrently. Whenever you spawn a new process, Elixir annotates the parent of that process through the `$ancestors` key. This information can be used by instrumentation tools to track the relationship between events occurring within multiple processes. However, many times, tracking only the `$ancestors` is not enough.
-
-For example, we recommend developers to always start tasks under a supervisor. This provides more visibility and allows us to control how those tasks are terminated when a node shuts down. In your code, this can be done by invoking something like: `Task.Supervisor.start_child(MySupervisor, task_specification)`. This means that, although your code is the one who invokes the task, the actual parent of the task would be the supervisor, as the supervisor is the one spawning it. We would list the supervisor as one of the `$ancestors` for the task, but the relationship between your code and the task is lost.
-
-In Elixir v1.8, we now track the relationship between your code and the task via the `$callers` key in the process dictionary, which aligns well with the existing `$ancestors` key. Therefore, assuming the `Task.Supervisor` call above, we have:
-
-    [your code] -- calls --> [supervisor] ---- spawns --> [task]
-
-which means we store the following relationships:
-
-    [your code]              [supervisor] <-- ancestor -- [task]
-         ^                                                  |
-         |--------------------- caller ---------------------|
-
-When a task is spawned directly from your code, without a supervisor, then the process running your code will be listed under both `$ancestors` and `$callers`.
-
-This small feature is very powerful. It allows instrumentation and monitoring tools to better track and relate the events happening in your system. This feature can also be used by tools like the "Ecto Sandbox". The "Ecto Sandbox" allows developers to run tests concurrently against the database, by using transactions and an ownership mechanism where each process explicitly gets a connection assigned to it. Without `$callers`, every time you spawned a task that queries the database, the task would not know its caller, and therefore it would be unable to know which connection was assigned to it. This often meant features that relies on tasks could not be tested concurrently. With `$callers`, figuring out this relationship is trivial and you have more tests using the full power of your machine.
-
-## v1.8.0-rc.0 (2018-12-24)
-
-### 1. Enhancements
-
-#### EEx
-
-  * [EEx] Optimize the default template engine to compile and execute more efficiently
-
-#### Elixir
-
-  * [Calendar] Add `Calendar.TimeZoneDatabase` and a `Calendar.UTCOnlyTimeZoneDatabase` implementation
-  * [Calendar] Add callbacks `day_of_year/3`, `quarter_of_year/3`, `year_of_era/1`, and `day_of_era/3`
-  * [Code.Formatter] Preserve user's choice of new line after most operators
-  * [Date] Add `Date.day_of_year/1`, `Date.quarter_of_year/1`, `Date.year_of_era/1`, and `Date.day_of_era/1`
-  * [DateTime] Add `DateTime.from_naive/3`, `DateTime.now/1`, and `DateTime.shift_zone/3`
-  * [File] Allow `:raw` option in `File.exists?/2`, `File.regular?/2`, and `File.dir?/2`
-  * [File] Allow POSIX time as an integer in `File.touch/2` and `File.touch!/2`
-  * [Inspect] Allow `Inspect` protocol to be derivable with the `:only`/`:except` options
-  * [Kernel] Do not propagate counters to variables in quote inside another quote
-  * [Kernel] Warn on ambiguous use of `::` and `|` in typespecs
-  * [Kernel] Add `:delegate_to` `@doc` metadata tag when using `defdelegate`
-  * [Kernel] Improve compile-time building of ranges via the `..` operator
-  * [Kernel] Compile charlist interpolation more efficiently
-  * [Kernel.SpecialForms] Add `:reduce` option to `for` comprehensions
-  * [List] Add `List.myers_difference/3` and `List.improper?/1`
-  * [Macro] Add `Macro.struct!/2` for proper struct resolution during compile time
-  * [Map] Optimize and merge nested maps `put` and `merge` operations
-  * [Range] Add `Range.disjoint?/2`
-  * [Record] Reduce memory allocation when updating multiple fields in a record
-  * [Registry] Allow associating a value on `:via` tuple
-  * [String] Add `String.bag_distance/2`
-  * [Task] Add `$callers` tracking to `Task` - this makes it easier to find which process spawned a task and use it for tracking ownership and monitoring
-
-#### ExUnit
-
-  * [ExUnit] Add `ExUnit.after_suite/1` callback
-  * [ExUnit.Assertions] Show last N messages (instead of first N) from mailbox on `assert_receive` fail
-
-#### IEx
-
-  * [IEx.Helpers] Add `port/1` and `port/2`
-  * [IEx.Server] Expose `IEx.Server.run/1` for custom IEx sessions with the ability to broker pry sessions
-
-#### Mix
-
-  * [Mix] Add `Mix.target/0` and `Mix.target/1` to control dependency management per target
-  * [Mix.Project] Add `:depth` and `:parents` options to `deps_paths/1`
-  * [mix archive.install] Add a timeout when installing archives
-  * [mix compile] Include optional dependencies in `:extra_applications`
-  * [mix escript.install] Add a timeout when installing escripts
-  * [mix format] Warn when the same file may be formatted by multiple `.formatter.exs`
-  * [mix test] Allow setting the maximum number of failures via `--max-failures`
-  * [mix test] Print a message instead of raising on unmatched tests inside umbrella projects
-
-### 2. Bug fixes
-
-#### Elixir
-
-  * [Calendar] Allow printing dates with more than 9999 years
-  * [Exception] Exclude deprecated functions in "did you mean?" hints
-  * [Float] Handle subnormal floats in `Float.ratio/1`
-  * [Kernel] Remove `Guard test tuple_size(...) can never succeed` Dialyzer warning on `try`
-  * [Kernel] Expand operands in `size*unit` bitstring modifier instead of expecting `size` and `unit` to be literal integers
-  * [Kernel] Do not deadlock on circular struct dependencies in typespecs
-  * [Kernel] Raise proper error message when passing flags to the Erlang compiler that Elixir cannot handle
-  * [Kernel] Do not leak variables in `cond` clauses with a single matching at compile-time clause
-  * [NaiveDateTime] Do not accept leap seconds in builder and parsing functions
-  * [String] Fix ZWJ handling in Unicode grapheme clusters
-
-#### IEx
-
-  * [IEx.Helpers] Use typespec info (instead of docs chunk) and properly format callbacks in `b/1`
-
-#### Logger
-
-  * [Logger] Allow Logger backends to be dynamically removed when an application is shutting down
-
-#### Mix
-
-  * [mix compile] Ensure changes in deps propagate to all umbrella children - this fix a long standing issue where updating a dependency would not recompile all projecys accordingly, requiring a complete removal of `_build`
-  * [mix compile] Avoid time drift when checking and updating compiler manifest files
-  * [mix compile.app] Respect the `:only` option between umbrella siblings
-  * [mix compile.protocols] Reconsolidate protocols if local dependencies are stale
-  * [mix deps] Properly mark dependencies with different `:system_env` as diverged
-  * [mix new] Use `--module` value when setting up filenames
-
-### 3. Soft-deprecations (no warnings emitted)
-
-None.
-
-### 4. Hard-deprecations
-
-#### Elixir
-
-  * [Enum] Passing a non-empty list to `Enum.into/2` was inconsistent with maps and is deprecated in favor of `Kernel.++/2` or `Keyword.merge/2`
-  * [Inspect.Algebra] `surround/3` is deprecated in favor of `Inspect.Algebra.concat/2` and `Inspect.Algebra.nest/2`
-  * [Inspect.Algebra] `surround_many/6` is deprecated in favor of `container_doc/6`
-  * [Kernel] Passing a non-empty list as `:into` in `for` comprehensions was inconsistent with maps and is deprecated in favor of `Kernel.++/2` or `Keyword.merge/2`
-  * [Kernel.ParallelCompiler] `files/2` is deprecated in favor of `compile/2`
-  * [Kernel.ParallelCompiler] `files_to_path/2` is deprecated in favor of `compile_to_path/2`
-  * [Kernel.ParallelRequire] `files/2` is deprecated in favor of `Kernel.ParallelCompiler.require/2`
-  * [System] `:seconds`, `:milliseconds`, etc. as time units is deprecated in favor of `:second`, `:millisecond`, etc.
-  * [System] `System.cwd/0` and `System.cwd!/0` are deprecated in favor of `File.cwd/0` and `File.cwd!/0`
-
-#### Mix
-
-  * [mix compile.erlang] Returning `{:ok, contents}` or `:error` as the callback in `Mix.Compilers.Erlang.compile/6` is deprecated in favor of returning `{:ok, contents, warnings}` or `{:error, errors, warnings}`
-
-## v1.7
-
-The CHANGELOG for v1.7 releases can be found [in the v1.7 branch](https://github.com/elixir-lang/elixir/blob/v1.7/CHANGELOG.md).

CODE_OF_CONDUCT.md

@@ -1,56 +0,0 @@
-# Code of Conduct
-
-Contact: elixir-lang-conduct@googlegroups.com
-
-## Why have a Code of Conduct?
-
-As contributors and maintainers of this project, we are committed to providing a friendly, safe and welcoming environment for all, regardless of age, disability, gender, nationality, race, religion, sexuality, or similar personal characteristic.
-
-The goal of the Code of Conduct is to specify a baseline standard of behavior so that people with different social values and communication styles can talk about Elixir effectively, productively, and respectfully, even in face of disagreements. The Code of Conduct also provides a mechanism for resolving conflicts in the community when they arise.
-
-## Our Values
-
-These are the values Elixir developers should aspire to:
-
-  * Be friendly and welcoming
-  * Be patient
-    * Remember that people have varying communication styles and that not everyone is using their native language. (Meaning and tone can be lost in translation.)
-  * Be thoughtful
-    * Productive communication requires effort. Think about how your words will be interpreted.
-    * Remember that sometimes it is best to refrain entirely from commenting.
-  * Be respectful
-    * In particular, respect differences of opinion. It is important that we resolve disagreements and differing views constructively.
-  * Avoid destructive behavior
-    * Derailing: stay on topic; if you want to talk about something else, start a new conversation.
-    * Unconstructive criticism: don't merely decry the current state of affairs; offer (or at least solicit) suggestions as to how things may be improved.
-    * Snarking (pithy, unproductive, sniping comments).
-
-The following actions are explicitly forbidden:
-
-  * Insulting, demeaning, hateful, or threatening remarks.
-  * Discrimination based on age, disability, gender, nationality, race, religion, sexuality, or similar personal characteristic.
-  * Bullying or systematic harassment.
-  * Unwelcome sexual advances.
-  * Incitement to any of these.
-
-## Where does the Code of Conduct apply?
-
-If you participate in or contribute to the Elixir ecosystem in any way, you are encouraged to follow the Code of Conduct while doing so.
-
-Explicit enforcement of the Code of Conduct applies to the official mediums operated by the Elixir project:
-
-* The official GitHub projects and code reviews.
-* The official elixir-lang mailing lists.
-* The #elixir-lang IRC channel on Freenode.
-
-Other Elixir activities (such as conferences, meetups, and other unofficial forums) are encouraged to adopt this Code of Conduct. Such groups must provide their own contact information.
-
-Project maintainers may remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct.
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by emailing: elixir-lang-conduct@googlegroups.com. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. **All reports will be kept confidential**.
-
-**The goal of the Code of Conduct is to resolve conflicts in the most harmonious way possible**. We hope that in most cases issues may be resolved through polite discussion and mutual agreement. Bannings and other forceful measures are to be employed only as a last resort. **Do not** post about the issue publicly or try to rally sentiment against a particular individual or group.
-
-## Acknowledgements
-
-This document was based on the Code of Conduct from the Go project with parts derived from Django's Code of Conduct, Rust's Code of Conduct and the Contributor Covenant.

ISSUE_TEMPLATE.md

@@ -1,20 +0,0 @@
-### Precheck
-
-* Do not use the issues tracker for help or support (try Elixir Forum, Stack Overflow, IRC, etc.)
-* For proposing a new feature, please start a discussion on the Elixir Core mailing list: https://groups.google.com/group/elixir-lang-core
-* For bugs, do a quick search and make sure the bug has not yet been reported
-* Please disclose security vulnerabilities privately at elixir-security@googlegroups.com
-* Finally, be nice and have fun!
-
-### Environment
-
-* Elixir & Erlang/OTP versions (elixir --version): 
-* Operating system: 
-
-### Current behavior
-
-Include code samples, errors and stacktraces if appropriate.
-
-### Expected behavior
-
-A short description on how you expect the code to behave.

LICENSE

@@ -1,176 +0,0 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
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-
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-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
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-
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-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
-
-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
-      defend, and hold each Contributor harmless for any liability
-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS

Makefile

@@ -1,284 +0,0 @@
-PREFIX ?= /usr/local
-SHARE_PREFIX ?= $(PREFIX)/share
-MAN_PREFIX ?= $(SHARE_PREFIX)/man
-CANONICAL := v1.8/ # master/ or vMAJOR.MINOR/
-ELIXIRC := bin/elixirc --verbose --ignore-module-conflict --warnings-as-errors
-ERLC := erlc -I lib/elixir/include +warnings_as_errors
-ERL := erl -I lib/elixir/include -noshell -pa lib/elixir/ebin
-GENERATE_APP := $(CURDIR)/lib/elixir/generate_app.escript
-VERSION := $(strip $(shell cat VERSION))
-Q := @
-LIBDIR := lib
-BINDIR := bin
-INSTALL = install
-INSTALL_DIR = $(INSTALL) -m755 -d
-INSTALL_DATA = $(INSTALL) -m644
-INSTALL_PROGRAM = $(INSTALL) -m755
-GIT_REVISION = $(strip $(shell git rev-parse HEAD 2> /dev/null ))
-GIT_TAG = $(strip $(shell head="$(call GIT_REVISION)"; git tag --points-at $$head 2> /dev/null | tail -1) )
-
-.PHONY: install compile erlang elixir unicode app build_plt clean_plt dialyze test clean clean_residual_files install_man clean_man docs Docs.zip Precompiled.zip zips
-.NOTPARALLEL: compile
-
-#==> Functions
-
-define CHECK_ERLANG_RELEASE
-	erl -noshell -eval '{V,_} = string:to_integer(erlang:system_info(otp_release)), io:fwrite("~s", [is_integer(V) and (V >= 20)])' -s erlang halt | grep -q '^true'; \
-		if [ $$? != 0 ]; then \
-		  echo "At least Erlang/OTP 20.0 is required to build Elixir"; \
-		  exit 1; \
-		fi
-endef
-
-define APP_TEMPLATE
-$(1): lib/$(1)/ebin/Elixir.$(2).beam lib/$(1)/ebin/$(1).app
-
-lib/$(1)/ebin/$(1).app: lib/$(1)/mix.exs
-	$(Q) cd lib/$(1) && ../../bin/elixir -e 'Mix.start(:permanent, [])' -r mix.exs -e 'Mix.Task.run("compile.app", ~w[--compile-path ebin])'
-
-lib/$(1)/ebin/Elixir.$(2).beam: $(wildcard lib/$(1)/lib/*.ex) $(wildcard lib/$(1)/lib/*/*.ex) $(wildcard lib/$(1)/lib/*/*/*.ex)
-	@ echo "==> $(1) (compile)"
-	@ rm -rf lib/$(1)/ebin
-	$(Q) cd lib/$(1) && ../../$$(ELIXIRC) "lib/**/*.ex" -o ebin
-
-test_$(1): compile $(1)
-	@ echo "==> $(1) (ex_unit)"
-	$(Q) cd lib/$(1) && ../../bin/elixir -r "test/test_helper.exs" -pr "test/**/*_test.exs";
-endef
-
-#==> Compilation tasks
-
-APP := lib/elixir/ebin/elixir.app
-PARSER := lib/elixir/src/elixir_parser.erl
-KERNEL := lib/elixir/ebin/Elixir.Kernel.beam
-UNICODE := lib/elixir/ebin/Elixir.String.Unicode.beam
-
-default: compile
-
-compile: erlang $(APP) elixir
-
-erlang: $(PARSER)
-	$(Q) if [ ! -f $(APP) ]; then $(call CHECK_ERLANG_RELEASE); fi
-	$(Q) cd lib/elixir && mkdir -p ebin && erl -make
-
-$(PARSER): lib/elixir/src/elixir_parser.yrl
-	$(Q) erlc -o $@ +'{verbose,true}' +'{report,true}' $<
-
-# Since Mix depends on EEx and EEx depends on Mix,
-# we first compile EEx without the .app file,
-# then Mix and then compile EEx fully
-elixir: stdlib lib/eex/ebin/Elixir.EEx.beam mix ex_unit logger eex iex
-
-stdlib: $(KERNEL) VERSION
-$(KERNEL): lib/elixir/lib/*.ex lib/elixir/lib/*/*.ex lib/elixir/lib/*/*/*.ex
-	$(Q) if [ ! -f $(KERNEL) ]; then \
-		echo "==> bootstrap (compile)"; \
-		$(ERL) -s elixir_compiler bootstrap -s erlang halt; \
-	fi
-	@ echo "==> elixir (compile)";
-	$(Q) cd lib/elixir && ../../$(ELIXIRC) "lib/kernel.ex" -o ebin;
-	$(Q) cd lib/elixir && ../../$(ELIXIRC) "lib/**/*.ex" -o ebin;
-	$(Q) $(MAKE) unicode
-	$(Q) $(MAKE) app
-
-app: $(APP)
-$(APP): lib/elixir/src/elixir.app.src lib/elixir/ebin VERSION $(GENERATE_APP)
-	$(Q) $(GENERATE_APP) $< $@ $(VERSION)
-
-unicode: $(UNICODE)
-$(UNICODE): lib/elixir/unicode/*
-	@ echo "==> unicode (compile)";
-	$(Q) $(ELIXIRC) lib/elixir/unicode/unicode.ex -o lib/elixir/ebin;
-	$(Q) $(ELIXIRC) lib/elixir/unicode/properties.ex -o lib/elixir/ebin;
-	$(Q) $(ELIXIRC) lib/elixir/unicode/tokenizer.ex -o lib/elixir/ebin;
-
-$(eval $(call APP_TEMPLATE,ex_unit,ExUnit))
-$(eval $(call APP_TEMPLATE,logger,Logger))
-$(eval $(call APP_TEMPLATE,eex,EEx))
-$(eval $(call APP_TEMPLATE,mix,Mix))
-$(eval $(call APP_TEMPLATE,iex,IEx))
-
-install: compile
-	@ echo "==> elixir (install)"
-	$(Q) for dir in lib/*; do \
-		rm -rf $(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/$$dir/ebin; \
-		$(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/$$dir/ebin"; \
-		$(INSTALL_DATA) $$dir/ebin/* "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/$$dir/ebin"; \
-	done
-	$(Q) $(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/bin"
-	$(Q) $(INSTALL_PROGRAM) $(filter-out %.ps1, $(filter-out %.bat, $(wildcard bin/*))) "$(DESTDIR)$(PREFIX)/$(LIBDIR)/elixir/bin"
-	$(Q) $(INSTALL_DIR) "$(DESTDIR)$(PREFIX)/$(BINDIR)"
-	$(Q) for file in "$(DESTDIR)$(PREFIX)"/$(LIBDIR)/elixir/bin/*; do \
-		ln -sf "../$(LIBDIR)/elixir/bin/$${file##*/}" "$(DESTDIR)$(PREFIX)/$(BINDIR)/"; \
-	done
-	$(MAKE) install_man
-
-clean:
-	rm -rf ebin
-	rm -rf lib/*/ebin
-	rm -rf $(PARSER)
-	$(Q) $(MAKE) clean_residual_files
-
-clean_elixir:
-	$(Q) rm -f lib/*/ebin/Elixir.*.beam
-
-clean_residual_files:
-	rm -rf lib/*/_build/
-	rm -rf lib/*/tmp/
-	rm -rf lib/elixir/test/ebin/
-	rm -rf lib/mix/test/fixtures/deps_on_git_repo/
-	rm -rf lib/mix/test/fixtures/git_rebar/
-	rm -rf lib/mix/test/fixtures/git_repo/
-	rm -rf lib/mix/test/fixtures/git_sparse_repo/
-	rm -f erl_crash.dump
-	$(Q) $(MAKE) clean_man
-
-#==> Documentation tasks
-
-LOGO_PATH = $(shell test -f ../docs/logo.png && echo "--logo ../docs/logo.png")
-SOURCE_REF = $(shell tag="$(call GIT_TAG)" revision="$(call GIT_REVISION)"; echo "$${tag:-$$revision}\c")
-DOCS_FORMAT = html
-COMPILE_DOCS = bin/elixir ../ex_doc/bin/ex_doc "$(1)" "$(VERSION)" "lib/$(2)/ebin" -m "$(3)" -u "https://github.com/elixir-lang/elixir" --source-ref "$(call SOURCE_REF)" $(call LOGO_PATH) -o doc/$(2) -n https://hexdocs.pm/$(2)/$(CANONICAL) -p https://elixir-lang.org/docs.html -f "$(DOCS_FORMAT)" $(4)
-
-docs: compile ../ex_doc/bin/ex_doc docs_elixir docs_eex docs_mix docs_iex docs_ex_unit docs_logger
-
-docs_elixir: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (elixir)"
-	$(Q) rm -rf doc/elixir
-	$(call COMPILE_DOCS,Elixir,elixir,Kernel,-c lib/elixir/docs.exs)
-
-docs_eex: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (eex)"
-	$(Q) rm -rf doc/eex
-	$(call COMPILE_DOCS,EEx,eex,EEx)
-
-docs_mix: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (mix)"
-	$(Q) rm -rf doc/mix
-	$(call COMPILE_DOCS,Mix,mix,Mix)
-
-docs_iex: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (iex)"
-	$(Q) rm -rf doc/iex
-	$(call COMPILE_DOCS,IEx,iex,IEx)
-
-docs_ex_unit: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (ex_unit)"
-	$(Q) rm -rf doc/ex_unit
-	$(call COMPILE_DOCS,ExUnit,ex_unit,ExUnit)
-
-docs_logger: compile ../ex_doc/bin/ex_doc
-	@ echo "==> ex_doc (logger)"
-	$(Q) rm -rf doc/logger
-	$(call COMPILE_DOCS,Logger,logger,Logger)
-
-../ex_doc/bin/ex_doc:
-	@ echo "ex_doc is not found in ../ex_doc as expected. See README for more information."
-	@ false
-
-#==> Zip tasks
-
-Docs.zip: docs
-	rm -f Docs-v$(VERSION).zip
-	zip -9 -r Docs-v$(VERSION).zip CHANGELOG.md doc NOTICE LICENSE README.md
-	@ echo "Docs file created $(CURDIR)/Docs-v$(VERSION).zip"
-
-Precompiled.zip: build_man compile
-	rm -f Precompiled-v$(VERSION).zip
-	zip -9 -r Precompiled-v$(VERSION).zip bin CHANGELOG.md lib/*/ebin lib/*/lib LICENSE man NOTICE README.md VERSION
-	@ echo "Precompiled file created $(CURDIR)/Precompiled-v$(VERSION).zip"
-
-zips: Precompiled.zip Docs.zip
-	@ echo ""
-	@ echo "## Checksums"
-	@ echo ""
-	@ shasum -a 1 < Precompiled-v$(VERSION).zip | sed -e "s/-//" | xargs echo "  * Precompiled.zip SHA1:"
-	@ shasum -a 512 < Precompiled-v$(VERSION).zip | sed -e "s/-//" | xargs echo "  * Precompiled.zip SHA512:"
-	@ shasum -a 1 < Docs-v$(VERSION).zip | sed -e "s/-//" | xargs echo "  * Docs.zip SHA1:"
-	@ shasum -a 512 < Docs-v$(VERSION).zip | sed -e "s/-//" | xargs echo "  * Docs.zip SHA512:"
-	@ echo ""
-
-#==> Test tasks
-
-test: test_formatted test_erlang test_elixir
-
-test_windows: test test_taskkill
-
-test_taskkill:
-	taskkill //IM erl.exe //F //T //FI "MEMUSAGE gt 0"
-	taskkill //IM epmd.exe //F //T //FI "MEMUSAGE gt 0"
-
-TEST_ERL = lib/elixir/test/erlang
-TEST_EBIN = lib/elixir/test/ebin
-TEST_ERLS = $(addprefix $(TEST_EBIN)/, $(addsuffix .beam, $(basename $(notdir $(wildcard $(TEST_ERL)/*.erl)))))
-
-test_formatted: compile
-	bin/elixir bin/mix format --check-formatted
-
-test_erlang: compile $(TEST_ERLS)
-	@ echo "==> elixir (eunit)"
-	$(Q) $(ERL) -pa $(TEST_EBIN) -s test_helper test;
-	@ echo ""
-
-$(TEST_EBIN)/%.beam: $(TEST_ERL)/%.erl
-	$(Q) mkdir -p $(TEST_EBIN)
-	$(Q) $(ERLC) -o $(TEST_EBIN) $<
-
-test_elixir: test_stdlib test_ex_unit test_logger test_mix test_eex test_iex
-
-test_stdlib: compile
-	@ echo "==> elixir (ex_unit)"
-	$(Q) exec epmd & exit
-	$(Q) if [ "$(OS)" = "Windows_NT" ]; then \
-		cd lib/elixir && cmd //C call ../../bin/elixir.bat -r "test/elixir/test_helper.exs" -pr "test/elixir/**/*_test.exs"; \
-	else \
-		cd lib/elixir && ../../bin/elixir -r "test/elixir/test_helper.exs" -pr "test/elixir/**/*_test.exs"; \
-	fi
-
-#==> Dialyzer tasks
-
-DIALYZER_OPTS = --no_check_plt --fullpath -Werror_handling -Wunmatched_returns -Wunderspecs
-PLT = .elixir.plt
-
-$(PLT):
-	@ echo "==> Building PLT with Elixir's dependencies..."
-	$(Q) dialyzer --output_plt $(PLT) --build_plt --apps erts kernel stdlib compiler syntax_tools parsetools tools ssl inets
-
-clean_plt:
-	$(Q) rm -f $(PLT)
-
-build_plt: clean_plt $(PLT)
-
-dialyze: compile $(PLT)
-	@ echo "==> Dialyzing Elixir..."
-	$(Q) dialyzer -pa lib/elixir/ebin --plt $(PLT) $(DIALYZER_OPTS) lib/*/ebin
-
-#==> Man page tasks
-
-build_man: man/iex.1 man/elixir.1
-
-man/iex.1:
-	$(Q) cp man/iex.1.in man/iex.1
-	$(Q) sed -i.bak "/{COMMON}/r man/common" man/iex.1
-	$(Q) sed -i.bak "/{COMMON}/d" man/iex.1
-	$(Q) rm -f man/iex.1.bak
-
-man/elixir.1:
-	$(Q) cp man/elixir.1.in man/elixir.1
-	$(Q) sed -i.bak "/{COMMON}/r man/common" man/elixir.1
-	$(Q) sed -i.bak "/{COMMON}/d" man/elixir.1
-	$(Q) rm -f man/elixir.1.bak
-
-clean_man:
-	rm -f man/elixir.1
-	rm -f man/elixir.1.bak
-	rm -f man/iex.1
-	rm -f man/iex.1.bak
-
-install_man: build_man
-	$(Q) mkdir -p $(DESTDIR)$(MAN_PREFIX)/man1
-	$(Q) $(INSTALL_DATA) man/elixir.1  $(DESTDIR)$(MAN_PREFIX)/man1
-	$(Q) $(INSTALL_DATA) man/elixirc.1 $(DESTDIR)$(MAN_PREFIX)/man1
-	$(Q) $(INSTALL_DATA) man/iex.1     $(DESTDIR)$(MAN_PREFIX)/man1
-	$(Q) $(INSTALL_DATA) man/mix.1     $(DESTDIR)$(MAN_PREFIX)/man1
-	$(MAKE) clean_man

NOTICE

@@ -1,36 +0,0 @@
-LEGAL NOTICE INFORMATION
-------------------------
-
-All the files in this distribution are copyright to the terms below.
-
-== lib/elixir/src/elixir_parser.erl (generated by build scripts)
-
-Copyright Ericsson AB 1996-2015
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-== All other files
-
-Copyright 2012 Plataformatec
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.

README.md

@@ -1,196 +1,94 @@
-![Elixir](https://github.com/elixir-lang/elixir-lang.github.com/raw/master/images/logo/logo.png)
-=========
-[![Travis build](https://secure.travis-ci.org/elixir-lang/elixir.svg?branch=master
-"Build Status")](https://travis-ci.org/elixir-lang/elixir)
+# n8n-openai-adapter
 
-Elixir is a dynamic, functional language designed for building scalable
-and maintainable applications.
+An OpenAI-compatible HTTP adapter that exposes self-hosted **n8n chat agents**
+behind a standard `/v1/chat/completions` API, so any OpenAI client (Cursor,
+LibreChat, the `openai` SDK, a custom app) can talk to your n8n agents as if
+they were OpenAI models.
 
-For more about Elixir, installation and documentation,
-[check Elixir's website](https://elixir-lang.org/).
+n8n itself does **not** ship an inbound OpenAI-compatible endpoint (its "AI
+Gateway" is an outbound proxy to n8n Cloud). This small Elixir service is the
+bridge: one `/v1/chat/completions` endpoint, routed to whichever n8n agent you
+name in the `model` field.
 
-## Announcements
+## How it works
 
-New releases are announced in the [announcements mailing list](https://groups.google.com/group/elixir-lang-ann). All security releases [will be tagged with `[security]`](https://groups.google.com/forum/#!searchin/elixir-lang-ann/%5Bsecurity%5D%7Csort:date).
-
-## Compiling from source
-
-To run Elixir from source, clone this repository to your machine, compile and test it:
-
-```sh
-git clone https://github.com/elixir-lang/elixir.git
-cd elixir
-make clean test
+```
+Your OpenAI client
+   POST /v1/chat/completions {"model":"scholar-agent","thread_id":"abc","messages":[...]}
+        |
+        v
+   n8n-openai-adapter (Plug + Bandit)
+     - authorize (Bearer <ADAPTER_API_KEY>)
+     - look up "scholar-agent" -> n8n chat webhook URL (AgentRegistry GenServer)
+     - take the last user message
+     - forward to the n8n webhook {sessionId: thread_id, action: sendMessage, chatInput}
+        |
+        v
+   n8n agent (its MCP tools, memory, etc. run as usual)
+        |
+        v
+   returns OpenAI-shaped {"choices":[{"message":{"role":"assistant","content":...}}]}
 ```
 
-> Note: if you are running on Windows,
-[this article includes important notes for compiling Elixir from source
-on Windows](https://github.com/elixir-lang/elixir/wiki/Windows).
+Multiple agents = multiple `model` names, each mapped to a different n8n webhook
+in the `AGENTS` env var.
 
-If Elixir fails to build (specifically when pulling in a new version via
-`git`), be sure to remove any previous build artifacts by running
-`make clean`, then `make test`.
+## Configuration (env vars)
 
-If tests pass, you are ready to move on to the [Getting Started guide][1]
-or to try Interactive Elixir by running `bin/iex` in your terminal.
+| Var              | Required | Purpose                                                            |
+|------------------|----------|---------------------------------------------------------------------|
+| `ADAPTER_API_KEY`| yes      | Bearer key that OpenAI clients send.                                |
+| `ADMIN_API_KEY`  | yes      | Bearer key for the admin API / web admin page.                      |
+| `AGENTS_FILE`    | no       | Path to the JSON store (default `/var/lib/n8n-openai/agents.json`). |
+| `PORT`           | no       | HTTP port (default `8000`).                                         |
+| `CHAT_WEBHOOK_BASIC` | no   | `"user:password"` if your n8n Chat Trigger is Basic-auth protected. |
 
-However, if tests fail, it is likely you have an outdated Erlang/OTP version
-(Elixir requires Erlang/OTP 20.0 or later). You can check your Erlang/OTP version
-by calling `erl` in the command line. You will see some information as follows:
+Agents are **not** configured via env — they're managed at runtime through the
+web admin page / admin API and persisted to `AGENTS_FILE`. The store starts
+empty; add agents after boot.
 
-    Erlang/OTP 20 [erts-9.0] [smp:2:2] [async-threads:10] [kernel-poll:false]
+## Admin API (manage agents at runtime)
 
-If you have properly set up your dependencies and tests still fail,
-you may want to open up a bug report, as explained next.
+Agents are persisted to `AGENTS_FILE` and can be added/removed without a
+redeploy, using the `ADMIN_API_KEY`:
 
-## Bug reports
+```bash
+# list
+curl -H "Authorization: Bearer $ADMIN_API_KEY" https://openai.bueso.eu/admin/agents
 
-For reporting bugs, [visit our issues tracker][2] and follow the steps
-for reporting a new issue. **Please disclose security vulnerabilities
-privately at elixir-security@googlegroups.com**.
+# add / update an agent
+curl -X POST -H "Authorization: Bearer $ADMIN_API_KEY" -H "Content-Type: application/json" \
+  -d '{"model":"media-agent","webhook":"https://n8n.bueso.eu/webhook/<id>/chat"}' \
+  https://openai.bueso.eu/admin/agents
 
-## Proposing new features
-
-For proposing new features, please start a discussion in the
-[Elixir Core mailing list][3]. Keep in mind that it is your responsibility
-to argue and explain why a feature is useful and how it will impact the
-codebase and the community.
-
-Once a proposal is accepted, it will be added to [the issues tracker][2].
-The issues tracker focuses on *actionable items* and it holds a list of
-upcoming enhancements and pending bugs. All entries in the tracker are
-tagged for clarity and to ease collaboration.
-
-Features and bug fixes that have already been merged and will be included
-in the next release are marked as "closed" in the issues tracker and are
-added to the [CHANGELOG](CHANGELOG.md).
-
-Finally, remember all interactions in our official spaces follow our
-[Code of Conduct][7].
-
-## Contributing
-
-We welcome everyone to contribute to Elixir. To do so, there are a few
-things you need to know about the code. First, Elixir code is divided
-in applications inside the `lib` folder:
-
-* `elixir` - Contains Elixir's kernel and stdlib
-
-* `eex` - Template engine that allows you to embed Elixir
-
-* `ex_unit` - Simple test framework that ships with Elixir
-
-* `iex` - IEx, Elixir's interactive shell
-
-* `logger` - The built-in logger
-
-* `mix` - Elixir's build tool
-
-You can run all tests in the root directory with `make test` and you can
-also run tests for a specific framework `make test_#{NAME}`, for example,
-`make test_ex_unit`. If you just changed something in the Elixir's standard
-library, you can run only that portion through `make test_stdlib`.
-
-If you are changing just one file, you can choose to compile and run tests only
-for that particular file for fast development cycles. For example, if you
-are changing the String module, you can compile it and run its tests as:
-
-```sh
-bin/elixirc lib/elixir/lib/string.ex -o lib/elixir/ebin
-bin/elixir lib/elixir/test/elixir/string_test.exs
+# remove
+curl -X DELETE -H "Authorization: Bearer $ADMIN_API_KEY" \
+  https://openai.bueso.eu/admin/agents/media-agent
 ```
 
-To recompile (including Erlang modules):
+The store is authoritative and persists across restarts; no env config needed.
 
-```sh
-make compile
+## Building & running
+
+```bash
+mix deps.get
+mix compile
+ADAPTER_API_KEY=secret AGENTS='{"scholar-agent":"https://n8n.bueso.eu/webhook/<id>/chat"}' \
+  PORT=8000 mix run --no-halt
 ```
 
-After your changes are done, please remember to run `mix format` to guarantee
-all files are properly formatted and then run the full suite with
-`make test`.
+## Testing
 
-If your contribution fails during the bootstrapping of the language,
-you can rebuild the language from scratch with:
-
-```sh
-make clean_elixir compile
+```bash
+MIX_ENV=test mix test
 ```
 
-Similarly, if you can't get Elixir to compile or the tests to pass after
-updating an existing checkout, run `make clean compile`. You can check
-[the official build status on Travis-CI](https://travis-ci.org/elixir-lang/elixir).
-More tasks can be found by reading the [Makefile](./Makefile).
+## Nix
 
-With tests running and passing, you are ready to contribute to Elixir and
-[send a pull request](https://help.github.com/articles/using-pull-requests/).
-We have saved some excellent pull requests we have received in the past in
-case you are looking for some examples:
+The repo ships a `flake.nix` exporting `overlays.default` and a `packages.default`
+(the packaged BEAM release), so it can be consumed as a flake input from your
+NixOS config just like any other flake — e.g.:
 
-* [Implement Enum.member? - Pull Request](https://github.com/elixir-lang/elixir/pull/992)
-* [Add String.valid? - Pull Request](https://github.com/elixir-lang/elixir/pull/1058)
-* [Implement capture_io for ExUnit - Pull Request](https://github.com/elixir-lang/elixir/pull/1059)
-
-### Reviewing changes
-
-Once a pull request is sent, the Elixir team will review your changes.
-We outline our process below to clarify the roles of everyone involved.
-
-All pull requests must be approved by two committers before being merged into
-the repository. If any changes are necessary, the team will leave appropriate
-comments requesting changes to the code. Unfortunately we cannot guarantee a
-pull request will be merged, even when modifications are requested, as the Elixir
-team will re-evaluate the contribution as it changes.
-
-Committers may also push style changes directly to your branch. If you would
-rather manage all changes yourself, you can disable "Allow edits from maintainers"
-feature when submitting your pull request.
-
-The Elixir team may optionally assign someone to review a pull request.
-If someone is assigned, they must explicitly approve the code before
-another team member can merge it.
-
-When the review finishes, your pull request will be squashed and merged
-into the repository. If you have carefully organized your commits and
-believe they should be merged without squashing, leave a comment.
-
-## Building documentation
-
-Building the documentation requires [ExDoc](https://github.com/elixir-lang/ex_doc)
-to be installed and built alongside Elixir:
-
-```sh
-# After cloning and compiling Elixir, in its parent directory:
-git clone git://github.com/elixir-lang/ex_doc.git
-cd ex_doc && ../elixir/bin/mix do deps.get, compile
-cd ../elixir && make docs
+```nix
+inputs.n8n-openai-adapter.url = "git+https://gitea.bueso.eu/<owner>/n8n-openai-adapter";
 ```
-
-This will produce documentation sets for `elixir`, `mix`, etc. under
-the `doc` directory. If you are planning to contribute documentation,
-[please check our best practices for writing documentation](https://hexdocs.pm/elixir/writing-documentation.html).
-
-## Development links
-
-  * [Elixir Getting Started guide][1]
-  * [Elixir Documentation][6]
-  * [Elixir Core Mailing list (development)][3]
-  * [Issues tracker][2]
-  * [Code of Conduct][7]
-  * **[#elixir-lang][4]** on [Freenode][5] IRC
-
-  [1]: https://elixir-lang.org/getting-started/introduction.html
-  [2]: https://github.com/elixir-lang/elixir/issues
-  [3]: https://groups.google.com/group/elixir-lang-core
-  [4]: https://webchat.freenode.net/?channels=#elixir-lang
-  [5]: http://www.freenode.net
-  [6]: https://elixir-lang.org/docs.html
-  [7]: CODE_OF_CONDUCT.md
-
-## License
-
-"Elixir" and the Elixir logo are copyright (c) 2012 Plataformatec.
-
-Elixir source code is released under Apache 2 License.
-
-Check [NOTICE](NOTICE) and [LICENSE](LICENSE) files for more information.

RELEASE.md

@@ -1,45 +0,0 @@
-# Release process
-
-## Shipping a new version
-
-1. Ensure you are running on the oldest supported Erlang version
-
-2. Update version in /VERSION
-
-3. Ensure /CHANGELOG.md is updated, versioned and add the current date
-
-4. Update "Compatibility and Deprecations" if a new OTP version is supported
-
-5. Commit changes above with title "Release vVERSION" and generate a new tag
-
-6. Run `make clean test` to ensure all tests pass from scratch and the CI is green
-
-7. Recompile an existing project (for example, Ecto) to ensure manifests can be upgraded
-
-8. Push branch and the new tag
-
-9. Publish new zips with `make zips`, upload `Precompiled.zip` and `Docs.zip` to GitHub Releases, and include SHAs+CHANGELOG
-
-10. Add the release to `elixir.csv` and `_data/elixir-versions.yml` files in `elixir-lang/elixir-lang.github.com`
-
-11. Send an e-mail to elixir-lang-ann@googlegroups.com with title "Elixir vVERSION released". The body should be a link to the Release page on GitHub. If it is a security release, prefix the title with the `[security]` tag
-
-## Creating a new vMAJOR.MINOR branch
-
-### In the new branch
-
-1. Set `CANONICAL=` in /Makefile
-
-2. Update tables in "Compatibility and Deprecations"
-
-3. Commit "Prepare vMAJOR.MINOR for release"
-
-### Back in master
-
-1. Bump /VERSION file
-
-2. Start new /CHANGELOG.md
-
-3. Update tables in "Compatibility and Deprecations"
-
-4. Commit "Start vMAJOR.MINOR+1"

VERSION

@@ -1 +0,0 @@
-1.8.0

bin/elixir

@@ -1,123 +0,0 @@
-#!/bin/sh
-if [ $# -eq 0 ] || [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
-  echo "Usage: `basename $0` [options] [.exs file] [data]
-
-  -e COMMAND                  Evaluates the given command (*)
-  -r FILE                     Requires the given files/patterns (*)
-  -S SCRIPT                   Finds and executes the given script in PATH
-  -pr FILE                    Requires the given files/patterns in parallel (*)
-  -pa PATH                    Prepends the given path to Erlang code path (*)
-  -pz PATH                    Appends the given path to Erlang code path (*)
-
-  --app APP                   Starts the given app and its dependencies (*)
-  --cookie COOKIE             Sets a cookie for this distributed node
-  --detached                  Starts the Erlang VM detached from console
-  --erl SWITCHES              Switches to be passed down to Erlang (*)
-  --help, -h                  Prints this message and exits
-  --hidden                    Makes a hidden node
-  --logger-otp-reports BOOL   Enables or disables OTP reporting
-  --logger-sasl-reports BOOL  Enables or disables SASL reporting
-  --name NAME                 Makes and assigns a name to the distributed node
-  --no-halt                   Does not halt the Erlang VM after execution
-  --sname NAME                Makes and assigns a short name to the distributed node
-  --version, -v               Prints Elixir version and exits
-  --werl                      Uses Erlang's Windows shell GUI (Windows only)
-
-** Options marked with (*) can be given more than once
-** Options given after the .exs file or -- are passed down to the executed code
-** Options can be passed to the Erlang runtime using ELIXIR_ERL_OPTIONS or --erl" >&2
-  exit 1
-fi
-
-readlink_f () {
-  cd "$(dirname "$1")" > /dev/null
-  filename="$(basename "$1")"
-  if [ -h "$filename" ]; then
-    readlink_f "$(readlink "$filename")"
-  else
-    echo "`pwd -P`/$filename"
-  fi
-}
-
-MODE="elixir"
-ERL_EXEC="erl"
-ERL=""
-I=1
-
-while [ $I -le $# ]; do
-  S=1
-  eval "PEEK=\${$I}"
-  case "$PEEK" in
-    +iex)
-        MODE="iex"
-        ;;
-    +elixirc)
-        MODE="elixirc"
-        ;;
-    -v|--compile|--no-halt)
-        ;;
-    -e|-r|-pr|-pa|-pz|--remsh|--app)
-        S=2
-        ;;
-    --detached|--hidden)
-        ERL="$ERL `echo $PEEK | cut -c 2-`"
-        ;;
-    --cookie)
-        I=$(expr $I + 1)
-        eval "VAL=\${$I}"
-        ERL="$ERL -setcookie "$VAL""
-        ;;
-    --sname|--name)
-        I=$(expr $I + 1)
-        eval "VAL=\${$I}"
-        ERL="$ERL `echo $PEEK | cut -c 2-` "$VAL""
-        ;;
-    --logger-otp-reports)
-        I=$(expr $I + 1)
-        eval "VAL=\${$I}"
-        if [ "$VAL" = 'true' ] || [ "$VAL" = 'false' ]; then
-            ERL="$ERL -logger handle_otp_reports "$VAL""
-        fi
-        ;;
-    --logger-sasl-reports)
-        I=$(expr $I + 1)
-        eval "VAL=\${$I}"
-        if [ "$VAL" = 'true' ] || [ "$VAL" = 'false' ]; then
-            ERL="$ERL -logger handle_sasl_reports "$VAL""
-        fi
-        ;;
-    --erl)
-        I=$(expr $I + 1)
-        eval "VAL=\${$I}"
-        ERL="$ERL "$VAL""
-        ;;
-    --werl)
-        USE_WERL=true
-        ;;
-    *)
-        break
-        ;;
-  esac
-  I=$(expr $I + $S)
-done
-
-SELF=$(readlink_f "$0")
-SCRIPT_PATH=$(dirname "$SELF")
-
-if [ "$OSTYPE" = "cygwin" ]; then SCRIPT_PATH=$(cygpath -m "$SCRIPT_PATH"); fi
-if [ "$MODE" != "iex" ]; then ERL="-noshell -s elixir start_cli $ERL"; fi
-
-# Check for terminal support
-if [ "$OS" != "Windows_NT" ]; then
-  if test -t 1 -a -t 2; then ERL="-elixir ansi_enabled true $ERL"; fi
-fi
-
-if [ "$OS" = "Windows_NT" ] && [ $USE_WERL ]; then
-    ERL_EXEC="werl"
-fi
-
-if [ -z "$ERL_PATH" ]; then
-  ERL_PATH="$ERL_EXEC"
-fi
-
-exec "$ERL_PATH" -pa "$SCRIPT_PATH"/../lib/*/ebin $ELIXIR_ERL_OPTIONS $ERL -extra "$@"

bin/elixir.bat

@@ -1,114 +0,0 @@
-@if defined ELIXIR_CLI_ECHO (@echo on) else (@echo off)
-setlocal
-if    ""%1""==""""       goto documentation
-if /I ""%1""==""--help"" goto documentation
-if /I ""%1""==""-h""     goto documentation
-if /I ""%1""==""/h""     goto documentation
-if    ""%1""==""/?""     goto documentation
-goto parseopts
-
-:documentation
-echo Usage: %~nx0 [options] [.exs file] [data]
-echo.
-echo   -e COMMAND                  Evaluates the given command (*)
-echo   -r FILE                     Requires the given files/patterns (*)
-echo   -S SCRIPT                   Finds and executes the given script in PATH
-echo   -pr FILE                    Requires the given files/patterns in parallel (*)
-echo   -pa PATH                    Prepends the given path to Erlang code path (*)
-echo   -pz PATH                    Appends the given path to Erlang code path (*)
-echo.
-echo   --app APP                   Starts the given app and its dependencies (*)
-echo   --cookie COOKIE             Sets a cookie for this distributed node
-echo   --detached                  Starts the Erlang VM detached from console
-echo   --erl SWITCHES              Switches to be passed down to Erlang (*)
-echo   --help, -h                  Prints this message and exits
-echo   --hidden                    Makes a hidden node
-echo   --logger-otp-reports BOOL   Enables or disables OTP reporting
-echo   --logger-sasl-reports BOOL  Enables or disables SASL reporting
-echo   --name NAME                 Makes and assigns a name to the distributed node
-echo   --no-halt                   Does not halt the Erlang VM after execution
-echo   --sname NAME                Makes and assigns a short name to the distributed node
-echo   --version, -v               Prints Elixir version and exits
-echo   --werl                      Uses Erlang's Windows shell GUI
-echo.
-echo ** Options marked with (*) can be given more than once
-echo ** Options given after the .exs file or -- are passed down to the executed code
-echo ** Options can be passed to the Erlang runtime using ELIXIR_ERL_OPTIONS or --erl
-goto end
-
-:parseopts
-
-rem Parameters for Erlang
-set parsErlang=
-
-rem Make sure we keep a copy of all parameters
-set allPars=%*
-
-rem Get the original path name from the batch file
-set originPath=%~dp0
-
-rem Optional parameters before the "-extra" parameter
-set beforeExtra=
-
-rem Option which determines whether or not to use werl vs erl
-set useWerl=0
-
-rem Designates which mode / Elixir component to run as
-set runMode="elixir"
-
-rem Recursive loop called for each parameter that parses the cmd line parameters
-:startloop
-set par="%1"
-shift
-if "%par%"=="" (
-  rem if no parameters defined
-  goto expand_erl_libs
-)
-if "%par%"=="""" (
-  rem if no parameters defined - special case for parameter that is already quoted
-  goto expand_erl_libs
-)
-rem ******* EXECUTION OPTIONS **********************
-if "%par%"==""--werl"" (set useWerl=1)
-if "%par%"==""+iex"" (set runMode="iex")
-rem ******* ELIXIR PARAMETERS **********************
-rem Note: we don't have to do anything with options that don't take an argument
-if """"=="%par:-e=%"      (shift)
-if """"=="%par:-r=%"      (shift)
-if """"=="%par:-pr=%"     (shift)
-if """"=="%par:-pa=%"     (shift)
-if """"=="%par:-pz=%"     (shift)
-if """"=="%par:--app=%"   (shift)
-if """"=="%par:--remsh=%" (shift)
-rem ******* ERLANG PARAMETERS **********************
-if """"=="%par:--detached=%"            (set parsErlang=%parsErlang% -detached)
-if """"=="%par:--hidden=%"              (set parsErlang=%parsErlang% -hidden)
-if """"=="%par:--cookie=%"              (set parsErlang=%parsErlang% -setcookie %1 && shift)
-if """"=="%par:--sname=%"               (set parsErlang=%parsErlang% -sname %1 && shift)
-if """"=="%par:--name=%"                (set parsErlang=%parsErlang% -name %1 && shift)
-if """"=="%par:--logger-otp-reports=%"  (set parsErlang=%parsErlang% -logger handle_otp_reports %1 && shift)
-if """"=="%par:--logger-sasl-reports=%" (set parsErlang=%parsErlang% -logger handle_sasl_reports %1 && shift)
-if """"=="%par:--erl=%"                 (set "beforeExtra=%beforeExtra% %~1" && shift)
-goto:startloop
-
-rem ******* assume all pre-params are parsed ********************
-:expand_erl_libs
-rem ******* expand all ebin paths as Windows does not support the ..\*\ebin wildcard ********************
-setlocal enabledelayedexpansion
-set ext_libs=
-for  /d %%d in ("%originPath%..\lib\*.") do (
-  set ext_libs=!ext_libs! -pa "%%~fd\ebin"
-)
-setlocal disabledelayedexpansion
-
-:run
-if not %runMode% == "iex" (
-  set beforeExtra=-noshell -s elixir start_cli %beforeExtra%
-)
-if %useWerl% equ 1 (
-  start werl.exe %ext_libs% %ELIXIR_ERL_OPTIONS% %parsErlang% %beforeExtra% -extra %*
-) else (
-  erl.exe %ext_libs% %ELIXIR_ERL_OPTIONS% %parsErlang% %beforeExtra% -extra %*
-)
-:end
-endlocal

bin/elixirc

@@ -1,33 +0,0 @@
-#!/bin/sh
-if [ $# -eq 0 ] || [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
-  echo "Usage: `basename $0` [elixir switches] [compiler switches] [.ex files]
-
-  -o                        The directory to output compiled files
-
-  --help, -h                Prints this message and exits
-  --ignore-module-conflict  Does not emit warnings if a module was previously defined
-  --no-debug-info           Does not attach debug info to compiled modules
-  --no-docs                 Does not attach documentation to compiled modules
-  --verbose                 Prints compilation status
-  --version, -v             Prints Elixir version and exits
-  --warnings-as-errors      Treats warnings as errors and return non-zero exit code
-
-** Options given after -- are passed down to the executed code
-** Options can be passed to the Erlang runtime using ELIXIR_ERL_OPTIONS
-** Options can be passed to the Erlang compiler using ERL_COMPILER_OPTIONS" >&2
-  exit 1
-fi
-
-readlink_f () {
-  cd "$(dirname "$1")" > /dev/null
-  filename="$(basename "$1")"
-  if [ -h "$filename" ]; then
-    readlink_f "$(readlink "$filename")"
-  else
-    echo "`pwd -P`/$filename"
-  fi
-}
-
-SELF=$(readlink_f "$0")
-SCRIPT_PATH=$(dirname "$SELF")
-exec "$SCRIPT_PATH"/elixir +elixirc "$@"

bin/elixirc.bat

@@ -1,36 +0,0 @@
-@if defined ELIXIR_CLI_ECHO (@echo on) else (@echo off)
-setlocal
-set argc=0
-for %%A in (%*) do (
-  if /I "%%A"=="--help" goto documentation
-  if /I "%%A"=="-h"     goto documentation
-  if /I "%%A"=="/h"     goto documentation
-  if    "%%A"=="/?"     goto documentation
-  set /A argc+=1
-)
-if %argc%==0 goto documentation
-goto run
-
-:documentation
-echo Usage: %~nx0 [elixir switches] [compiler switches] [.ex files]
-echo.
-echo   -o                        The directory to output compiled files
-echo.
-echo   --help, -h                Prints this message and exits
-echo   --ignore-module-conflict  Does not emit warnings if a module was previously defined
-echo   --no-debug-info           Does not attach debug info to compiled modules
-echo   --no-docs                 Does not attach documentation to compiled modules
-echo   --verbose                 Prints compilation status
-echo   --version, -v             Prints Elixir version and exits
-echo   --warnings-as-errors      Treats warnings as errors and returns non-zero exit code
-echo.
-echo ** Options given after -- are passed down to the executed code
-echo ** Options can be passed to the Erlang runtime using ELIXIR_ERL_OPTIONS
-echo ** Options can be passed to the Erlang compiler using ERL_COMPILER_OPTIONS
-goto end
-
-:run
-call "%~dp0\elixir.bat" +elixirc %*
-
-:end
-endlocal

bin/iex

@@ -1,48 +0,0 @@
-#!/bin/sh
-if [ $# -gt 0 ] && ([ "$1" = "--help" ] || [ "$1" = "-h" ]); then
-  echo "Usage: `basename $0` [options] [.exs file] [data]
-
-  -e COMMAND                  Evaluates the given command (*)
-  -r FILE                     Requires the given files/patterns (*)
-  -S SCRIPT                   Finds and executes the given script in PATH
-  -pr FILE                    Requires the given files/patterns in parallel (*)
-  -pa PATH                    Prepends the given path to Erlang code path (*)
-  -pz PATH                    Appends the given path to Erlang code path (*)
-
-  --app APP                   Starts the given app and its dependencies (*)
-  --cookie COOKIE             Sets a cookie for this distributed node
-  --detached                  Starts the Erlang VM detached from console
-  --erl SWITCHES              Switches to be passed down to Erlang (*)
-  --help, -h                  Prints this message and exits
-  --hidden                    Makes a hidden node
-  --logger-otp-reports BOOL   Enables or disables OTP reporting
-  --logger-sasl-reports BOOL  Enables or disables SASL reporting
-  --name NAME                 Makes and assigns a name to the distributed node
-  --no-halt                   Does not halt the Erlang VM after execution
-  --sname NAME                Makes and assigns a short name to the distributed node
-  --version, -v               Prints IEx version and exits
-  --werl                      Uses Erlang's Windows shell GUI (Windows only)
-
-  --dot-iex PATH              Overrides default .iex.exs file and uses path instead;
-                              path can be empty, then no file will be loaded
-  --remsh NAME                Connects to a node using a remote shell
-
-** Options marked with (*) can be given more than once
-** Options given after the .exs file or -- are passed down to the executed code
-** Options can be passed to the VM using ELIXIR_ERL_OPTIONS or --erl" >&2
-  exit 1
-fi
-
-readlink_f () {
-  cd "$(dirname "$1")" > /dev/null
-  filename="$(basename "$1")"
-  if [ -h "$filename" ]; then
-    readlink_f "$(readlink "$filename")"
-  else
-    echo "`pwd -P`/$filename"
-  fi
-}
-
-SELF=$(readlink_f "$0")
-SCRIPT_PATH=$(dirname "$SELF")
-exec "$SCRIPT_PATH"/elixir --no-halt --erl "-noshell -user Elixir.IEx.CLI" +iex "$@"

bin/iex.bat

@@ -1,46 +0,0 @@
-@if defined ELIXIR_CLI_ECHO (@echo on) else  (@echo off)
-setlocal
-if /I ""%1""==""--help"" goto documentation
-if /I ""%1""==""-h""     goto documentation
-if /I ""%1""==""/h""     goto documentation
-if    ""%1""==""/?""     goto documentation
-goto run
-
-:documentation
-echo Usage: %~nx0 [options] [.exs file] [data]
-echo.
-echo   -e COMMAND                  Evaluates the given command (*)
-echo   -r FILE                     Requires the given files/patterns (*)
-echo   -S SCRIPT                   Finds and executes the given script in PATH
-echo   -pr FILE                    Requires the given files/patterns in parallel (*)
-echo   -pa PATH                    Prepends the given path to Erlang code path (*)
-echo   -pz PATH                    Appends the given path to Erlang code path (*)
-echo.
-echo   --app APP                   Starts the given app and its dependencies (*)
-echo   --cookie COOKIE             Sets a cookie for this distributed node
-echo   --detached                  Starts the Erlang VM detached from console
-echo   --erl SWITCHES              Switches to be passed down to Erlang (*)
-echo   --help, -h                  Prints this message and exits
-echo   --hidden                    Makes a hidden node
-echo   --logger-otp-reports BOOL   Enables or disables OTP reporting
-echo   --logger-sasl-reports BOOL  Enables or disables SASL reporting
-echo   --name NAME                 Makes and assigns a name to the distributed node
-echo   --no-halt                   Does not halt the Erlang VM after execution
-echo   --sname NAME                Makes and assigns a short name to the distributed node
-echo   --version, -v               Prints IEx version and exits
-echo   --werl                      Uses Erlang's Windows shell GUI (Windows only)
-echo.
-echo   --dot-iex PATH              Overrides default .iex.exs file and uses path instead;
-echo                               path can be empty, then no file will be loaded
-echo   --remsh NAME                Connects to a node using a remote shell
-echo.
-echo ** Options marked with (*) can be given more than once
-echo ** Options given after the .exs file or -- are passed down to the executed code
-echo ** Options can be passed to the Erlang VM using ELIXIR_ERL_OPTIONS or --erl
-goto end
-
-:run
-@if defined IEX_WITH_WERL (@set __ELIXIR_IEX_FLAGS=--werl) else (set __ELIXIR_IEX_FLAGS=)
-call "%~dp0\elixir.bat" --no-halt --erl "-noshell -user Elixir.IEx.CLI" +iex %__ELIXIR_IEX_FLAGS% %*
-:end
-endlocal

bin/mix

@@ -1,3 +0,0 @@
-#!/usr/bin/env elixir
-Mix.start
-Mix.CLI.main

bin/mix.bat

@@ -1,2 +0,0 @@
-@if defined ELIXIR_CLI_ECHO (@echo on) else (@echo off)
-call "%~dp0\elixir.bat" "%~dp0\mix" %*

bin/mix.ps1

@@ -1,23 +0,0 @@
-# Store path to mix.bat as a FileInfo object
-$mixBatPath = (Get-ChildItem (((Get-ChildItem $MyInvocation.MyCommand.Path).Directory.FullName) + '\mix.bat'))
-$newArgs = @()
-
-for ($i = 0; $i -lt $args.length; $i++)
-{
-  if ($args[$i] -is [array])
-  {
-    # Commas created the array so we need to reintroduce those commas
-    for ($j = 0; $j -lt $args[$i].length - 1; $j++)
-    {
-      $newArgs += ($args[$i][$j] + ',')
-    }
-    $newArgs += $args[$i][-1]
-  }
-  else
-  {
-    $newArgs += $args[$i]
-  }
-}
-
-# Corrected arguments are ready to pass to batch file
-& $mixBatPath $newArgs

config/config.exs

@@ -0,0 +1,7 @@
+import Config
+
+import_config "#{config_env()}.exs"
+
+if config_env() == :test do
+  config :logger, level: :warning
+end

config/dev.exs

@@ -0,0 +1,3 @@
+import Config
+
+# Dev: no special config — all runtime settings come from env vars.

config/prod.exs

@@ -0,0 +1,5 @@
+import Config
+
+# Production: no hardcoded values here. All runtime config (PORT, AGENTS,
+# ADAPTER_API_KEY, CHAT_WEBHOOK_BASIC) comes from the systemd EnvironmentFile
+# in the NixOS service module.

config/test.exs

@@ -0,0 +1,7 @@
+import Config
+
+# Test environment: the app starts with an empty agent store (no AGENTS env
+# seeding — agents are managed via the admin API). ADAPTER_API_KEY /
+# ADMIN_API_KEY are set in test/test_helper.exs. AGENTS_FILE must be set HERE
+# (config loads before the app boots) to a writable tmp path.
+System.put_env("AGENTS_FILE", Path.join(System.tmp_dir!(), "n8n-openai-test-agents.json"))

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1788881743,
+        "narHash": "sha256-2V9GZGvPfrNzxFozhI9dcqV+c3QdA8YZrvAAzqEB+dI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "d6524aaca2ff07876657ae2b323f24be4874944b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,48 @@
+{
+  description = "OpenAI-compatible adapter exposing n8n chat agents behind /v1/chat/completions";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs =
+    { self, nixpkgs, ... }:
+    let
+      supportedSystems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in
+    {
+      packages = forAllSystems (
+        system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+          beamPackages = pkgs.beamPackages;
+        in
+        {
+          default = beamPackages.mixRelease {
+            pname = "n8n-openai-adapter";
+            version = "0.1.0";
+            src = self;
+            mixFodDeps = beamPackages.fetchMixDeps {
+              pname = "n8n-openai-adapter";
+              version = "0.1.0";
+              src = self;
+              hash = "sha256-sdAhpZUeF33V9xjEa/z/aTmCllfetMjO/1XyfJfUNao=";
+            };
+          };
+        }
+      );
+
+      overlays.default = final: prev: {
+        n8n-openai-adapter = self.packages.${final.stdenv.system}.default;
+      };
+
+      # Proper NixOS module: consume with
+      #   imports = [ inputs.n8n-openai-adapter.nixosModules.default ];
+      #   services.n8n-openai-adapter = { enable = true; domain = "..."; port = 8134; };
+      nixosModules.default = import ./nixos-module.nix;
+    };
+}

lib/eex/lib/eex.ex

@@ -1,227 +0,0 @@
-defmodule EEx.SyntaxError do
-  defexception [:message, :file, :line]
-
-  @impl true
-  def message(exception) do
-    "#{exception.file}:#{exception.line}: #{exception.message}"
-  end
-end
-
-defmodule EEx do
-  @moduledoc ~S"""
-  EEx stands for Embedded Elixir. It allows you to embed
-  Elixir code inside a string in a robust way.
-
-      iex> EEx.eval_string("foo <%= bar %>", bar: "baz")
-      "foo baz"
-
-  ## API
-
-  This module provides 3 main APIs for you to use:
-
-    1. Evaluate a string (`eval_string`) or a file (`eval_file`)
-       directly. This is the simplest API to use but also the
-       slowest, since the code is evaluated and not compiled before.
-
-    2. Define a function from a string (`function_from_string`)
-       or a file (`function_from_file`). This allows you to embed
-       the template as a function inside a module which will then
-       be compiled. This is the preferred API if you have access
-       to the template at compilation time.
-
-    3. Compile a string (`compile_string`) or a file (`compile_file`)
-       into Elixir syntax tree. This is the API used by both functions
-       above and is available to you if you want to provide your own
-       ways of handling the compiled template.
-
-  ## Options
-
-  All functions in this module accept EEx-related options.
-  They are:
-
-    * `:line` - the line to be used as the template start. Defaults to 1.
-    * `:file` - the file to be used in the template. Defaults to the given
-      file the template is read from or to "nofile" when compiling from a string.
-    * `:engine` - the EEx engine to be used for compilation.
-    * `:trim` - trims whitespace left/right of quotation tags
-
-  ## Engine
-
-  EEx has the concept of engines which allows you to modify or
-  transform the code extracted from the given string or file.
-
-  By default, `EEx` uses the `EEx.SmartEngine` that provides some
-  conveniences on top of the simple `EEx.Engine`.
-
-  ### Tags
-
-  `EEx.SmartEngine` supports the following tags:
-
-      <% Elixir expression - inline with output %>
-      <%= Elixir expression - replace with result %>
-      <%% EEx quotation - returns the contents inside %>
-      <%# Comments - they are discarded from source %>
-
-  All expressions that output something to the template
-  **must** use the equals sign (`=`). Since everything in
-  Elixir is an expression, there are no exceptions for this rule.
-  For example, while some template languages would special-case
-  `if/2` clauses, they are treated the same in EEx and
-  also require `=` in order to have their result printed:
-
-      <%= if true do %>
-        It is obviously true
-      <% else %>
-        This will never appear
-      <% end %>
-
-  Notice that different engines may have different rules
-  for each tag. Other tags may be added in future versions.
-
-  ### Macros
-
-  `EEx.SmartEngine` also adds some macros to your template.
-  An example is the `@` macro which allows easy data access
-  in a template:
-
-      iex> EEx.eval_string("<%= @foo %>", assigns: [foo: 1])
-      "1"
-
-  In other words, `<%= @foo %>` translates to:
-
-      <%= {:ok, v} = Access.fetch(assigns, :foo); v %>
-
-  The `assigns` extension is useful when the number of variables
-  required by the template is not specified at compilation time.
-  """
-
-  @doc """
-  Generates a function definition from the string.
-
-  The kind (`:def` or `:defp`) must be given, the
-  function name, its arguments and the compilation options.
-
-  ## Examples
-
-      iex> defmodule Sample do
-      ...>   require EEx
-      ...>   EEx.function_from_string :def, :sample, "<%= a + b %>", [:a, :b]
-      ...> end
-      iex> Sample.sample(1, 2)
-      "3"
-
-  """
-  defmacro function_from_string(kind, name, source, args \\ [], options \\ []) do
-    quote bind_quoted: binding() do
-      info = Keyword.merge([file: __ENV__.file, line: __ENV__.line], options)
-      args = Enum.map(args, fn arg -> {arg, [line: info[:line]], nil} end)
-      compiled = EEx.compile_string(source, info)
-
-      case kind do
-        :def -> def unquote(name)(unquote_splicing(args)), do: unquote(compiled)
-        :defp -> defp unquote(name)(unquote_splicing(args)), do: unquote(compiled)
-      end
-    end
-  end
-
-  @doc """
-  Generates a function definition from the file contents.
-
-  The kind (`:def` or `:defp`) must be given, the
-  function name, its arguments and the compilation options.
-
-  This function is useful in case you have templates but
-  you want to precompile inside a module for speed.
-
-  ## Examples
-
-      # sample.eex
-      <%= a + b %>
-
-      # sample.ex
-      defmodule Sample do
-        require EEx
-        EEx.function_from_file :def, :sample, "sample.eex", [:a, :b]
-      end
-
-      # iex
-      Sample.sample(1, 2) #=> "3"
-
-  """
-  defmacro function_from_file(kind, name, file, args \\ [], options \\ []) do
-    quote bind_quoted: binding() do
-      info = Keyword.merge(options, file: file, line: 1)
-      args = Enum.map(args, fn arg -> {arg, [line: 1], nil} end)
-      compiled = EEx.compile_file(file, info)
-
-      @external_resource file
-      @file file
-      case kind do
-        :def -> def unquote(name)(unquote_splicing(args)), do: unquote(compiled)
-        :defp -> defp unquote(name)(unquote_splicing(args)), do: unquote(compiled)
-      end
-    end
-  end
-
-  @doc """
-  Gets a string `source` and generate a quoted expression
-  that can be evaluated by Elixir or compiled to a function.
-  """
-  @spec compile_string(String.t(), keyword) :: Macro.t()
-  def compile_string(source, options \\ []) when is_binary(source) and is_list(options) do
-    EEx.Compiler.compile(source, options)
-  end
-
-  @doc """
-  Gets a `filename` and generate a quoted expression
-  that can be evaluated by Elixir or compiled to a function.
-  """
-  @spec compile_file(String.t(), keyword) :: Macro.t()
-  def compile_file(filename, options \\ []) when is_binary(filename) and is_list(options) do
-    options = Keyword.merge(options, file: filename, line: 1)
-    compile_string(File.read!(filename), options)
-  end
-
-  @doc """
-  Gets a string `source` and evaluate the values using the `bindings`.
-
-  ## Examples
-
-      iex> EEx.eval_string("foo <%= bar %>", bar: "baz")
-      "foo baz"
-
-  """
-  @spec eval_string(String.t(), keyword, keyword) :: any
-  def eval_string(source, bindings \\ [], options \\ [])
-      when is_binary(source) and is_list(bindings) and is_list(options) do
-    compiled = compile_string(source, options)
-    do_eval(compiled, bindings, options)
-  end
-
-  @doc """
-  Gets a `filename` and evaluate the values using the `bindings`.
-
-  ## Examples
-
-      # sample.eex
-      foo <%= bar %>
-
-      # iex
-      EEx.eval_file "sample.eex", [bar: "baz"] #=> "foo baz"
-
-  """
-  @spec eval_file(String.t(), keyword, keyword) :: any
-  def eval_file(filename, bindings \\ [], options \\ [])
-      when is_binary(filename) and is_list(bindings) and is_list(options) do
-    options = Keyword.put(options, :file, filename)
-    compiled = compile_file(filename, options)
-    do_eval(compiled, bindings, options)
-  end
-
-  ### Helpers
-
-  defp do_eval(compiled, bindings, options) do
-    {result, _} = Code.eval_quoted(compiled, bindings, options)
-    result
-  end
-end

lib/eex/lib/eex/compiler.ex

@@ -1,190 +0,0 @@
-defmodule EEx.Compiler do
-  @moduledoc false
-
-  # When changing this setting, don't forget to update the docs for EEx
-  @default_engine EEx.SmartEngine
-
-  @doc """
-  This is the compilation entry point. It glues the tokenizer
-  and the engine together by handling the tokens and invoking
-  the engine every time a full expression or text is received.
-  """
-  @spec compile(String.t(), keyword) :: Macro.t()
-  def compile(source, opts) when is_binary(source) and is_list(opts) do
-    file = opts[:file] || "nofile"
-    line = opts[:line] || 1
-    trim = opts[:trim] || false
-
-    case EEx.Tokenizer.tokenize(source, line, trim: trim) do
-      {:ok, tokens} ->
-        state = %{
-          engine: opts[:engine] || @default_engine,
-          file: file,
-          line: line,
-          quoted: [],
-          start_line: nil
-        }
-
-        init = state.engine.init(opts)
-        generate_buffer(tokens, init, [], state)
-
-      {:error, line, message} ->
-        raise EEx.SyntaxError, line: line, file: file, message: message
-    end
-  end
-
-  # Generates the buffers by handling each expression from the tokenizer.
-  # It returns Macro.t/0 or it raises.
-
-  defp generate_buffer([{:text, chars} | rest], buffer, scope, state) do
-    buffer = state.engine.handle_text(buffer, IO.chardata_to_string(chars))
-    generate_buffer(rest, buffer, scope, state)
-  end
-
-  defp generate_buffer([{:expr, line, mark, chars} | rest], buffer, scope, state) do
-    expr = Code.string_to_quoted!(chars, line: line, file: state.file)
-    buffer = state.engine.handle_expr(buffer, IO.chardata_to_string(mark), expr)
-    generate_buffer(rest, buffer, scope, state)
-  end
-
-  defp generate_buffer([{:start_expr, start_line, mark, chars} | rest], buffer, scope, state) do
-    {contents, line, rest} = look_ahead_text(rest, start_line, chars)
-
-    {contents, rest} =
-      generate_buffer(rest, state.engine.handle_begin(buffer), [contents | scope], %{
-        state
-        | quoted: [],
-          line: line,
-          start_line: start_line
-      })
-
-    buffer = state.engine.handle_expr(buffer, IO.chardata_to_string(mark), contents)
-    generate_buffer(rest, buffer, scope, state)
-  end
-
-  defp generate_buffer([{:middle_expr, line, '', chars} | rest], buffer, [current | scope], state) do
-    {wrapped, state} = wrap_expr(current, line, buffer, chars, state)
-    state = %{state | line: line}
-    generate_buffer(rest, state.engine.handle_begin(buffer), [wrapped | scope], state)
-  end
-
-  defp generate_buffer(
-         [{:middle_expr, line, modifier, chars} | t],
-         buffer,
-         [_ | _] = scope,
-         state
-       ) do
-    message =
-      "unexpected beginning of EEx tag \"<%#{modifier}\" on \"<%#{modifier}#{chars}%>\", " <>
-        "please remove \"#{modifier}\" accordingly"
-
-    :elixir_errors.warn(line, state.file, message)
-    generate_buffer([{:middle_expr, line, '', chars} | t], buffer, scope, state)
-    # TODO: Make this an error on Elixir v2.0 since it accidentally worked previously.
-    # raise EEx.SyntaxError, message: message, file: state.file, line: line
-  end
-
-  defp generate_buffer([{:middle_expr, line, _, chars} | _], _buffer, [], state) do
-    raise EEx.SyntaxError,
-      message: "unexpected middle of expression <%#{chars}%>",
-      file: state.file,
-      line: line
-  end
-
-  defp generate_buffer([{:end_expr, line, '', chars} | rest], buffer, [current | _], state) do
-    {wrapped, state} = wrap_expr(current, line, buffer, chars, state)
-    tuples = Code.string_to_quoted!(wrapped, line: state.start_line, file: state.file)
-    buffer = insert_quoted(tuples, state.quoted)
-    {buffer, rest}
-  end
-
-  defp generate_buffer([{:end_expr, line, modifier, chars} | t], buffer, [_ | _] = scope, state) do
-    message =
-      "unexpected beginning of EEx tag \"<%#{modifier}\" on end of " <>
-        "expression \"<%#{modifier}#{chars}%>\", please remove \"#{modifier}\" accordingly"
-
-    :elixir_errors.warn(line, state.file, message)
-    generate_buffer([{:end_expr, line, '', chars} | t], buffer, scope, state)
-    # TODO: Make this an error on Elixir v2.0 since it accidentally worked previously.
-    # raise EEx.SyntaxError, message: message, file: state.file, line: line
-  end
-
-  defp generate_buffer([{:end_expr, line, _, chars} | _], _buffer, [], state) do
-    raise EEx.SyntaxError,
-      message: "unexpected end of expression <%#{chars}%>",
-      file: state.file,
-      line: line
-  end
-
-  defp generate_buffer([], buffer, [], state) do
-    state.engine.handle_body(buffer)
-  end
-
-  defp generate_buffer([], _buffer, _scope, state) do
-    raise EEx.SyntaxError,
-      message: "unexpected end of string, expected a closing '<% end %>'",
-      file: state.file,
-      line: state.line
-  end
-
-  # Creates a placeholder and wrap it inside the expression block
-
-  defp wrap_expr(current, line, buffer, chars, state) do
-    new_lines = List.duplicate(?\n, line - state.line)
-    key = length(state.quoted)
-    placeholder = '__EEX__(' ++ Integer.to_charlist(key) ++ ');'
-    count = current ++ placeholder ++ new_lines ++ chars
-    new_state = %{state | quoted: [{key, state.engine.handle_end(buffer)} | state.quoted]}
-
-    {count, new_state}
-  end
-
-  # Look text ahead on expressions
-
-  defp look_ahead_text(
-         [{:text, text}, {:middle_expr, line, _, chars} | rest] = tokens,
-         start,
-         contents
-       ) do
-    if only_spaces?(text) do
-      {contents ++ text ++ chars, line, rest}
-    else
-      {contents, start, tokens}
-    end
-  end
-
-  defp look_ahead_text([{:middle_expr, line, _, chars} | rest], _start, contents) do
-    {contents ++ chars, line, rest}
-  end
-
-  defp look_ahead_text(tokens, start, contents) do
-    {contents, start, tokens}
-  end
-
-  defp only_spaces?(chars) do
-    Enum.all?(chars, &(&1 in [?\s, ?\t, ?\r, ?\n]))
-  end
-
-  # Changes placeholder to real expression
-
-  defp insert_quoted({:__EEX__, _, [key]}, quoted) do
-    {^key, value} = List.keyfind(quoted, key, 0)
-    value
-  end
-
-  defp insert_quoted({left, line, right}, quoted) do
-    {insert_quoted(left, quoted), line, insert_quoted(right, quoted)}
-  end
-
-  defp insert_quoted({left, right}, quoted) do
-    {insert_quoted(left, quoted), insert_quoted(right, quoted)}
-  end
-
-  defp insert_quoted(list, quoted) when is_list(list) do
-    Enum.map(list, &insert_quoted(&1, quoted))
-  end
-
-  defp insert_quoted(other, _quoted) do
-    other
-  end
-end

lib/eex/lib/eex/engine.ex

@@ -1,210 +0,0 @@
-defmodule EEx.Engine do
-  @moduledoc ~S"""
-  Basic EEx engine that ships with Elixir.
-
-  An engine needs to implement all callbacks below.
-
-  An engine may also `use EEx.Engine` to get the default behaviour
-  but this is not advised. In such cases, if any of the callbacks
-  are overridden, they must call `super()` to delegate to the
-  underlying `EEx.Engine`.
-  """
-
-  @type state :: term
-
-  @doc """
-  Called at the beginning of every template.
-
-  It must return the initial state.
-  """
-  @callback init(opts :: keyword) :: state
-
-  @doc """
-  Called at the end of every template.
-
-  It must return Elixir's quoted expressions for the template.
-  """
-  @callback handle_body(state) :: Macro.t()
-
-  @doc """
-  Called for the text/static parts of a template.
-
-  It must return the updated state.
-  """
-  @callback handle_text(state, text :: String.t()) :: state
-
-  @doc """
-  Called for the dynamic/code parts of a template.
-
-  The marker is what follows exactly after `<%`. For example,
-  `<% foo %>` has an empty marker, but `<%= foo %>` has `"="`
-  as marker. The allowed markers so far are:
-
-    * `""`
-    * `"="`
-    * `"/"`
-    * `"|"`
-
-  Markers `"/"` and `"|"` are only for use in custom EEx engines
-  and are not implemented by default. Using them without an
-  appropriate implementation raises `EEx.SyntaxError`.
-
-  It must return the updated state.
-  """
-  @callback handle_expr(state, marker :: String.t(), expr :: Macro.t()) :: state
-
-  @doc """
-  Invoked at the beginning of every nesting.
-
-  It must return a new state that is used only inside the nesting.
-  Once the nesting terminates, the current `state` is resumed.
-  """
-  @callback handle_begin(state) :: state
-
-  @doc """
-  Invokes at the end of a nesting.
-
-  It must return Elixir's quoted expressions for the nesting.
-  """
-  @callback handle_end(state) :: Macro.t()
-
-  @doc false
-  defmacro __using__(_) do
-    quote do
-      @behaviour EEx.Engine
-
-      def init(opts) do
-        EEx.Engine.init(opts)
-      end
-
-      def handle_body(state) do
-        EEx.Engine.handle_body(state)
-      end
-
-      def handle_begin(state) do
-        EEx.Engine.handle_begin(state)
-      end
-
-      def handle_end(state) do
-        EEx.Engine.handle_end(state)
-      end
-
-      def handle_text(state, text) do
-        EEx.Engine.handle_text(state, text)
-      end
-
-      def handle_expr(state, marker, expr) do
-        EEx.Engine.handle_expr(state, marker, expr)
-      end
-
-      defoverridable EEx.Engine
-    end
-  end
-
-  @doc """
-  Handles assigns in quoted expressions.
-
-  A warning will be printed on missing assigns.
-  Future versions will raise.
-
-  This can be added to any custom engine by invoking
-  `handle_assign/1` with `Macro.prewalk/2`:
-
-      def handle_expr(state, token, expr) do
-        expr = Macro.prewalk(expr, &EEx.Engine.handle_assign/1)
-        super(state, token, expr)
-      end
-
-  """
-  @spec handle_assign(Macro.t()) :: Macro.t()
-  def handle_assign({:@, meta, [{name, _, atom}]}) when is_atom(name) and is_atom(atom) do
-    line = meta[:line] || 0
-    quote(line: line, do: EEx.Engine.fetch_assign!(var!(assigns), unquote(name)))
-  end
-
-  def handle_assign(arg) do
-    arg
-  end
-
-  @doc false
-  # TODO: Raise on 2.0
-  @spec fetch_assign!(Access.t(), Access.key()) :: term | nil
-  def fetch_assign!(assigns, key) do
-    case Access.fetch(assigns, key) do
-      {:ok, val} ->
-        val
-
-      :error ->
-        keys = Enum.map(assigns, &elem(&1, 0))
-
-        IO.warn(
-          "assign @#{key} not available in EEx template. " <>
-            "Please ensure all assigns are given as options. " <>
-            "Available assigns: #{inspect(keys)}"
-        )
-
-        nil
-    end
-  end
-
-  @doc false
-  def init(_opts) do
-    %{
-      binary: [],
-      dynamic: [],
-      vars_count: 0
-    }
-  end
-
-  @doc false
-  def handle_begin(state) do
-    %{state | binary: [], dynamic: []}
-  end
-
-  @doc false
-  def handle_end(quoted) do
-    handle_body(quoted)
-  end
-
-  @doc false
-  def handle_body(state) do
-    %{binary: binary, dynamic: dynamic} = state
-    binary = {:<<>>, [], Enum.reverse(binary)}
-    dynamic = [binary | dynamic]
-    {:__block__, [], Enum.reverse(dynamic)}
-  end
-
-  @doc false
-  def handle_text(state, text) do
-    %{binary: binary} = state
-    %{state | binary: [text | binary]}
-  end
-
-  @doc false
-  def handle_expr(state, "=", ast) do
-    %{binary: binary, dynamic: dynamic, vars_count: vars_count} = state
-    var = Macro.var(:"arg#{vars_count}", __MODULE__)
-
-    ast =
-      quote do
-        unquote(var) = String.Chars.to_string(unquote(ast))
-      end
-
-    segment =
-      quote do
-        unquote(var) :: binary
-      end
-
-    %{state | dynamic: [ast | dynamic], binary: [segment | binary], vars_count: vars_count + 1}
-  end
-
-  def handle_expr(state, "", ast) do
-    %{dynamic: dynamic} = state
-    %{state | dynamic: [ast | dynamic]}
-  end
-
-  def handle_expr(_state, marker, _ast) when marker in ["/", "|"] do
-    raise EEx.SyntaxError,
-          "unsupported EEx syntax <%#{marker} %> (the syntax is valid but not supported by the current EEx engine)"
-  end
-end

lib/eex/lib/eex/smart_engine.ex

@@ -1,41 +0,0 @@
-defmodule EEx.SmartEngine do
-  @moduledoc """
-  The default engine used by EEx.
-
-  It includes assigns (like `@foo`) and possibly other
-  conveniences in the future.
-
-  ## Examples
-
-      iex> EEx.eval_string("<%= @foo %>", assigns: [foo: 1])
-      "1"
-
-  In the example above, we can access the value `foo` under
-  the binding `assigns` using `@foo`. This is useful because
-  a template, after being compiled, can receive different
-  assigns and would not require recompilation for each
-  variable set.
-
-  Assigns can also be used when compiled to a function:
-
-      # sample.eex
-      <%= @a + @b %>
-
-      # sample.ex
-      defmodule Sample do
-        require EEx
-        EEx.function_from_file :def, :sample, "sample.eex", [:assigns]
-      end
-
-      # iex
-      Sample.sample(a: 1, b: 2) #=> "3"
-
-  """
-
-  use EEx.Engine
-
-  def handle_expr(buffer, mark, expr) do
-    expr = Macro.prewalk(expr, &EEx.Engine.handle_assign/1)
-    super(buffer, mark, expr)
-  end
-end

lib/eex/lib/eex/tokenizer.ex

@@ -1,231 +0,0 @@
-defmodule EEx.Tokenizer do
-  @moduledoc false
-
-  @type content :: IO.chardata()
-  @type line :: non_neg_integer
-  @type marker :: '=' | '/' | '|' | ''
-  @type token ::
-          {:text, content}
-          | {:expr | :start_expr | :middle_expr | :end_expr, line, marker, content}
-
-  @doc """
-  Tokenizes the given charlist or binary.
-
-  It returns {:ok, list} with the following tokens:
-
-    * `{:text, content}`
-    * `{:expr, line, marker, content}`
-    * `{:start_expr, line, marker, content}`
-    * `{:middle_expr, line, marker, content}`
-    * `{:end_expr, line, marker, content}`
-
-  Or `{:error, line, error}` in case of errors.
-  """
-  @spec tokenize(binary | charlist, line, keyword) :: {:ok, [token]} | {:error, line, String.t()}
-  def tokenize(bin, line, opts \\ [])
-
-  def tokenize(bin, line, opts)
-      when is_binary(bin) and is_integer(line) and line >= 0 and is_list(opts) do
-    tokenize(String.to_charlist(bin), line, opts)
-  end
-
-  def tokenize(list, line, opts)
-      when is_list(list) and is_integer(line) and line >= 0 and is_list(opts) do
-    tokenize(list, line, opts, [], [])
-  end
-
-  defp tokenize('<%%' ++ t, line, opts, buffer, acc) do
-    tokenize(t, line, opts, [?%, ?< | buffer], acc)
-  end
-
-  defp tokenize('<%#' ++ t, line, opts, buffer, acc) do
-    case expr(t, line, []) do
-      {:error, _, _} = error ->
-        error
-
-      {:ok, _, new_line, rest} ->
-        {rest, new_line, buffer} = trim_if_needed(rest, new_line, opts, buffer, acc)
-        tokenize(rest, new_line, opts, buffer, acc)
-    end
-  end
-
-  defp tokenize('<%' ++ t, line, opts, buffer, acc) do
-    {marker, t} = retrieve_marker(t)
-
-    case expr(t, line, []) do
-      {:error, _, _} = error ->
-        error
-
-      {:ok, expr, new_line, rest} ->
-        token = token_name(expr)
-        {rest, new_line, buffer} = trim_if_needed(rest, new_line, opts, buffer, acc)
-        acc = tokenize_text(buffer, acc)
-        final = {token, line, marker, Enum.reverse(expr)}
-        tokenize(rest, new_line, opts, [], [final | acc])
-    end
-  end
-
-  defp tokenize('\n' ++ t, line, opts, buffer, acc) do
-    tokenize(t, line + 1, opts, [?\n | buffer], acc)
-  end
-
-  defp tokenize([h | t], line, opts, buffer, acc) do
-    tokenize(t, line, opts, [h | buffer], acc)
-  end
-
-  defp tokenize([], _line, _opts, buffer, acc) do
-    {:ok, Enum.reverse(tokenize_text(buffer, acc))}
-  end
-
-  # Retrieve marker for <%
-
-  defp retrieve_marker([marker | t]) when marker in [?=, ?/, ?|] do
-    {[marker], t}
-  end
-
-  defp retrieve_marker(t) do
-    {'', t}
-  end
-
-  # Tokenize an expression until we find %>
-
-  defp expr([?%, ?> | t], line, buffer) do
-    {:ok, buffer, line, t}
-  end
-
-  defp expr('\n' ++ t, line, buffer) do
-    expr(t, line + 1, [?\n | buffer])
-  end
-
-  defp expr([h | t], line, buffer) do
-    expr(t, line, [h | buffer])
-  end
-
-  defp expr([], line, _buffer) do
-    {:error, line, "missing token '%>'"}
-  end
-
-  # Receive an expression content and check
-  # if it is a start, middle or an end token.
-  #
-  # Start tokens finish with "do" and "fn ->"
-  # Middle tokens are marked with "->" or keywords
-  # End tokens contain only the end word and optionally ")"
-
-  defp token_name([h | t]) when h in [?\s, ?\t, ?)] do
-    token_name(t)
-  end
-
-  defp token_name('od' ++ [h | _]) when h in [?\s, ?\t, ?)] do
-    :start_expr
-  end
-
-  defp token_name('>-' ++ rest) do
-    rest = Enum.reverse(rest)
-
-    # Tokenize the remaining passing check_terminators as
-    # false, which relax the tokenizer to not error on
-    # unmatched pairs. Then, we check if there is a "fn"
-    # token and, if so, it is not followed by an "end"
-    # token. If this is the case, we are on a start expr.
-    case :elixir_tokenizer.tokenize(rest, 1, file: "eex", check_terminators: false) do
-      {:ok, tokens} ->
-        tokens = Enum.reverse(tokens)
-        fn_index = fn_index(tokens)
-
-        if fn_index && end_index(tokens) > fn_index do
-          :start_expr
-        else
-          :middle_expr
-        end
-
-      _error ->
-        :middle_expr
-    end
-  end
-
-  defp token_name('esle' ++ t), do: check_spaces(t, :middle_expr)
-  defp token_name('retfa' ++ t), do: check_spaces(t, :middle_expr)
-  defp token_name('hctac' ++ t), do: check_spaces(t, :middle_expr)
-  defp token_name('eucser' ++ t), do: check_spaces(t, :middle_expr)
-  defp token_name('dne' ++ t), do: check_spaces(t, :end_expr)
-
-  defp token_name(_) do
-    :expr
-  end
-
-  defp fn_index(tokens) do
-    Enum.find_index(tokens, fn
-      {:fn_paren, _} -> true
-      {:fn, _} -> true
-      _ -> false
-    end)
-  end
-
-  defp end_index(tokens) do
-    Enum.find_index(tokens, &match?({:end, _}, &1)) || :infinity
-  end
-
-  defp check_spaces(string, token) do
-    if Enum.all?(string, &(&1 in [?\s, ?\t])) do
-      token
-    else
-      :expr
-    end
-  end
-
-  # Tokenize the buffered text by appending
-  # it to the given accumulator.
-
-  defp tokenize_text([], acc) do
-    acc
-  end
-
-  defp tokenize_text(buffer, acc) do
-    [{:text, Enum.reverse(buffer)} | acc]
-  end
-
-  # If trim mode is enabled and the token is on a line with
-  # only itself and whitespace, trim the whitespace around it,
-  # including the line break following it if there is one.
-  defp trim_if_needed(rest, line, opts, buffer, acc) do
-    original = {rest, line, buffer}
-
-    if opts[:trim] do
-      case {trim_left(buffer, acc), trim_right(rest, line)} do
-        {{true, new_buffer}, {true, new_rest, new_line}} ->
-          {new_rest, new_line, new_buffer}
-
-        _ ->
-          original
-      end
-    else
-      original
-    end
-  end
-
-  defp trim_left(buffer, acc) do
-    case {trim_whitespace(buffer), acc} do
-      {[?\n | _] = trimmed_buffer, _} -> {true, trimmed_buffer}
-      {[], []} -> {true, []}
-      _ -> {false, buffer}
-    end
-  end
-
-  defp trim_right(rest, line) do
-    case trim_whitespace(rest) do
-      [?\r, ?\n | trimmed_rest] -> {true, trimmed_rest, line + 1}
-      [?\n | trimmed_rest] -> {true, trimmed_rest, line + 1}
-      [] -> {true, [], line}
-      _ -> {false, rest, line}
-    end
-  end
-
-  defp trim_whitespace([h | t]) when h == ?\s or h == ?\t do
-    trim_whitespace(t)
-  end
-
-  defp trim_whitespace(list) do
-    list
-  end
-end

lib/eex/mix.exs

@@ -1,11 +0,0 @@
-defmodule EEx.MixProject do
-  use Mix.Project
-
-  def project do
-    [
-      app: :eex,
-      version: System.version(),
-      build_per_environment: false
-    ]
-  end
-end

lib/eex/test/eex/smart_engine_test.exs

@@ -1,48 +0,0 @@
-Code.require_file("../test_helper.exs", __DIR__)
-
-defmodule EEx.SmartEngineTest do
-  # TODO: Make this async: true once capture_io is removed
-  use ExUnit.Case
-
-  test "evaluates simple string" do
-    assert_eval("foo bar", "foo bar")
-  end
-
-  test "evaluates with assigns as keywords" do
-    assert_eval("1", "<%= @foo %>", assigns: [foo: 1])
-  end
-
-  test "evaluates with assigns as a map" do
-    assert_eval("1", "<%= @foo %>", assigns: %{foo: 1})
-  end
-
-  test "error with missing assigns" do
-    stderr =
-      ExUnit.CaptureIO.capture_io(:stderr, fn ->
-        assert_eval("", "<%= @foo %>", assigns: %{})
-      end)
-
-    assert stderr =~ "assign @foo not available in EEx template"
-  end
-
-  test "evaluates with loops" do
-    assert_eval("1\n2\n3\n", "<%= for x <- [1, 2, 3] do %><%= x %>\n<% end %>")
-  end
-
-  test "preserves line numbers" do
-    result = EEx.compile_string("<%= @hello %>", engine: EEx.SmartEngine)
-
-    Macro.prewalk(result, fn
-      {_left, meta, _right} ->
-        assert Keyword.get(meta, :line, 0) in [0, 1]
-
-      _ ->
-        :ok
-    end)
-  end
-
-  defp assert_eval(expected, actual, binding \\ []) do
-    result = EEx.eval_string(actual, binding, file: __ENV__.file, engine: EEx.SmartEngine)
-    assert result == expected
-  end
-end

lib/eex/test/eex/tokenizer_test.exs

@@ -1,193 +0,0 @@
-Code.require_file("../test_helper.exs", __DIR__)
-
-defmodule EEx.TokenizerTest do
-  use ExUnit.Case, async: true
-  require EEx.Tokenizer, as: T
-
-  test "simple chars lists" do
-    assert T.tokenize('foo', 1) == {:ok, [{:text, 'foo'}]}
-  end
-
-  test "simple strings" do
-    assert T.tokenize("foo", 1) == {:ok, [{:text, 'foo'}]}
-  end
-
-  test "strings with embedded code" do
-    assert T.tokenize('foo <% bar %>', 1) == {:ok, [{:text, 'foo '}, {:expr, 1, '', ' bar '}]}
-  end
-
-  test "strings with embedded equals code" do
-    assert T.tokenize('foo <%= bar %>', 1) == {:ok, [{:text, 'foo '}, {:expr, 1, '=', ' bar '}]}
-  end
-
-  test "strings with embedded slash code" do
-    assert T.tokenize('foo <%/ bar %>', 1) == {:ok, [{:text, 'foo '}, {:expr, 1, '/', ' bar '}]}
-  end
-
-  test "strings with embedded pipe code" do
-    assert T.tokenize('foo <%| bar %>', 1) == {:ok, [{:text, 'foo '}, {:expr, 1, '|', ' bar '}]}
-  end
-
-  test "strings with more than one line" do
-    assert T.tokenize('foo\n<%= bar %>', 1) == {:ok, [{:text, 'foo\n'}, {:expr, 2, '=', ' bar '}]}
-  end
-
-  test "strings with more than one line and expression with more than one line" do
-    string = '''
-    foo <%= bar
-
-    baz %>
-    <% foo %>
-    '''
-
-    exprs = [
-      {:text, 'foo '},
-      {:expr, 1, '=', ' bar\n\nbaz '},
-      {:text, '\n'},
-      {:expr, 4, '', ' foo '},
-      {:text, '\n'}
-    ]
-
-    assert T.tokenize(string, 1) == {:ok, exprs}
-  end
-
-  test "quotation" do
-    assert T.tokenize('foo <%% true %>', 1) == {:ok, [{:text, 'foo <% true %>'}]}
-  end
-
-  test "quotation with do/end" do
-    assert T.tokenize('foo <%% true do %>bar<%% end %>', 1) ==
-             {:ok, [{:text, 'foo <% true do %>bar<% end %>'}]}
-  end
-
-  test "quotation with interpolation" do
-    exprs = [
-      {:text, 'a <% b '},
-      {:expr, 1, '=', ' c '},
-      {:text, ' '},
-      {:expr, 1, '=', ' d '},
-      {:text, ' e %> f'}
-    ]
-
-    assert T.tokenize('a <%% b <%= c %> <%= d %> e %> f', 1) == {:ok, exprs}
-  end
-
-  test "improperly formatted quotation with interpolation" do
-    exprs = [
-      {:text, '<%% a <%= b %> c %>'}
-    ]
-
-    assert T.tokenize('<%%% a <%%= b %> c %>', 1) == {:ok, exprs}
-  end
-
-  test "comments" do
-    exprs = [
-      {:text, 'foo '}
-    ]
-
-    assert T.tokenize('foo <%# true %>', 1) == {:ok, exprs}
-  end
-
-  test "comments with do/end" do
-    exprs = [
-      {:text, 'foo bar'}
-    ]
-
-    assert T.tokenize('foo <%# true do %>bar<%# end %>', 1) == {:ok, exprs}
-  end
-
-  test "strings with embedded do end" do
-    exprs = [
-      {:text, 'foo '},
-      {:start_expr, 1, '', ' if true do '},
-      {:text, 'bar'},
-      {:end_expr, 1, '', ' end '}
-    ]
-
-    assert T.tokenize('foo <% if true do %>bar<% end %>', 1) == {:ok, exprs}
-  end
-
-  test "strings with embedded -> end" do
-    exprs = [
-      {:text, 'foo '},
-      {:start_expr, 1, '', ' cond do '},
-      {:middle_expr, 1, '', ' false -> '},
-      {:text, 'bar'},
-      {:middle_expr, 1, '', ' true -> '},
-      {:text, 'baz'},
-      {:end_expr, 1, '', ' end '}
-    ]
-
-    assert T.tokenize('foo <% cond do %><% false -> %>bar<% true -> %>baz<% end %>', 1) ==
-             {:ok, exprs}
-  end
-
-  test "strings with embedded keywords blocks" do
-    exprs = [
-      {:text, 'foo '},
-      {:start_expr, 1, '', ' if true do '},
-      {:text, 'bar'},
-      {:middle_expr, 1, '', ' else '},
-      {:text, 'baz'},
-      {:end_expr, 1, '', ' end '}
-    ]
-
-    assert T.tokenize('foo <% if true do %>bar<% else %>baz<% end %>', 1) == {:ok, exprs}
-  end
-
-  test "trim mode" do
-    template = '\t<%= if true do %> \n TRUE \n  <% else %>\n FALSE \n  <% end %>  '
-
-    exprs = [
-      {:start_expr, 1, '=', ' if true do '},
-      {:text, ' TRUE \n'},
-      {:middle_expr, 3, '', ' else '},
-      {:text, ' FALSE \n'},
-      {:end_expr, 5, '', ' end '}
-    ]
-
-    assert T.tokenize(template, 1, trim: true) == {:ok, exprs}
-  end
-
-  test "trim mode with comment" do
-    exprs = [
-      {:text, '123'}
-    ]
-
-    assert T.tokenize('  <%# comment %>  \n123', 1, trim: true) == {:ok, exprs}
-  end
-
-  test "trim mode with CRLF" do
-    exprs = [
-      {:text, '0\r\n'},
-      {:expr, 2, '=', ' 12 '},
-      {:text, '34'}
-    ]
-
-    assert T.tokenize('0\r\n  <%= 12 %>  \r\n34', 1, trim: true) == {:ok, exprs}
-  end
-
-  test "trim mode set to false" do
-    exprs = [
-      {:text, ' '},
-      {:expr, 1, '=', ' 12 '},
-      {:text, ' \n'}
-    ]
-
-    assert T.tokenize(' <%= 12 %> \n', 1, trim: false) == {:ok, exprs}
-  end
-
-  test "trim mode no false positives" do
-    assert_not_trimmed = fn x -> assert T.tokenize(x, 1, trim: true) == T.tokenize(x, 1) end
-
-    assert_not_trimmed.('foo <%= "bar" %>  ')
-    assert_not_trimmed.('\n  <%= "foo" %>bar')
-    assert_not_trimmed.('  <%% hello %>  ')
-    assert_not_trimmed.('  <%= 01 %><%= 23 %>\n')
-  end
-
-  test "raise syntax error when there is start mark and no end mark" do
-    assert T.tokenize('foo <% :bar', 1) == {:error, 1, "missing token '%>'"}
-    assert T.tokenize('<%# true ', 1) == {:error, 1, "missing token '%>'"}
-  end
-end

lib/eex/test/eex_test.exs

@@ -1,530 +0,0 @@
-Code.require_file("test_helper.exs", __DIR__)
-
-require EEx
-
-defmodule EExTest.Compiled do
-  def before_compile do
-    {__ENV__.line, hd(tl(get_stacktrace()))}
-  end
-
-  EEx.function_from_string(:def, :string_sample, "<%= a + b %>", [:a, :b])
-
-  filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
-  EEx.function_from_file(:defp, :private_file_sample, filename, [:bar])
-
-  filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
-  EEx.function_from_file(:def, :public_file_sample, filename, [:bar])
-
-  def file_sample(arg), do: private_file_sample(arg)
-
-  def after_compile do
-    {__ENV__.line, hd(tl(get_stacktrace()))}
-  end
-
-  @file "unknown"
-  def unknown do
-    {__ENV__.line, hd(tl(get_stacktrace()))}
-  end
-
-  defp get_stacktrace do
-    try do
-      :erlang.error("failed")
-    rescue
-      _ -> __STACKTRACE__
-    end
-  end
-end
-
-defmodule Clause do
-  defmacro defclause(expr, block) do
-    quote do
-      def unquote(expr), unquote(block)
-    end
-  end
-end
-
-defmodule EExTest do
-  use ExUnit.Case, async: true
-
-  doctest EEx
-  doctest EEx.Engine
-  doctest EEx.SmartEngine
-
-  describe "evaluates" do
-    test "simple string" do
-      assert_eval("foo bar", "foo bar")
-    end
-
-    test "Unicode" do
-      template = """
-        • <%= "•" %> •
-        <%= "Jößé Vâlìm" %> Jößé Vâlìm
-      """
-
-      assert_eval("  • • •\n  Jößé Vâlìm Jößé Vâlìm\n", template)
-    end
-
-    test "trim mode" do
-      string = "<%= 123 %> \n456\n  <%= 789 %>"
-      expected = "123456\n789"
-      assert_eval(expected, string, [], trim: true)
-    end
-
-    test "trim mode with middle expression" do
-      string = """
-      <%= cond do %>
-      <% false -> %>
-        this
-      <% true -> %>
-        that
-      <% end %>
-      """
-
-      expected = "  that\n"
-      assert_eval(expected, string, [], trim: true)
-    end
-
-    test "embedded code" do
-      assert_eval("foo bar", "foo <%= :bar %>")
-    end
-
-    test "embedded code with binding" do
-      assert EEx.eval_string("foo <%= bar %>", bar: 1) == "foo 1"
-    end
-
-    test "embedded code with do end when true" do
-      assert_eval("foo bar", "foo <%= if true do %>bar<% end %>")
-    end
-
-    test "embedded code with do end when false" do
-      assert_eval("foo ", "foo <%= if false do %>bar<% end %>")
-    end
-
-    test "embedded code with do end and expression" do
-      assert_eval("foo bar", "foo <%= if true do %><%= :bar %><% end %>")
-    end
-
-    test "embedded code with do end and multiple expressions" do
-      assert_eval(
-        "foo bar baz",
-        "foo <%= if true do %>bar <% Process.put(:eex_text, 1) %><%= :baz %><% end %>"
-      )
-
-      assert Process.get(:eex_text) == 1
-    end
-
-    test "embedded code with middle expression" do
-      assert_eval("foo bar", "foo <%= if true do %>bar<% else %>baz<% end %>")
-    end
-
-    test "embedded code with evaluated middle expression" do
-      assert_eval("foo baz", "foo <%= if false do %>bar<% else %>baz<% end %>")
-    end
-
-    test "embedded code with nested do end" do
-      assert_eval("foo bar", "foo <%= if true do %><%= if true do %>bar<% end %><% end %>")
-    end
-
-    test "embedded code with nested do end with middle expression" do
-      assert_eval(
-        "foo baz",
-        "foo <%= if true do %><%= if false do %>bar<% else %>baz<% end %><% end %>"
-      )
-    end
-
-    test "embedded code with parentheses after end in end token" do
-      assert_eval(
-        " 101  102  103 ",
-        "<%= Enum.map([1, 2, 3], (fn x -> %> <%= 100 + x %> <% end) ) %>"
-      )
-    end
-
-    test "embedded code with variable definition" do
-      assert_eval("foo 1", "foo <% bar = 1 %><%= bar %>")
-    end
-
-    test "embedded code with require" do
-      assert_eval("foo 1,2,3", "foo <% require Enum, as: E %><%= E.join [1, 2, 3], \",\" %>")
-    end
-
-    test "with end of token" do
-      assert_eval("foo bar %>", "foo bar %>")
-    end
-  end
-
-  describe "raises syntax errors" do
-    test "when the token is invalid" do
-      assert_raise EEx.SyntaxError, "nofile:1: missing token '%>'", fn ->
-        EEx.compile_string("foo <%= bar")
-      end
-    end
-
-    test "when middle expression is found without a start expression" do
-      assert_raise EEx.SyntaxError, "nofile:1: unexpected middle of expression <% else %>", fn ->
-        EEx.compile_string("<% if true %> foo<% else %>bar<% end %>")
-      end
-    end
-
-    test "when end expression is found without a start expression" do
-      assert_raise EEx.SyntaxError, "nofile:1: unexpected end of expression <% end %>", fn ->
-        EEx.compile_string("foo <% end %>")
-      end
-    end
-
-    test "when start expression is found without an end expression" do
-      msg = "nofile:2: unexpected end of string, expected a closing '<% end %>'"
-
-      assert_raise EEx.SyntaxError, msg, fn ->
-        EEx.compile_string("foo\n<% if true do %>")
-      end
-    end
-
-    test "when nested end expression is found without a start expression" do
-      assert_raise EEx.SyntaxError, "nofile:1: unexpected end of expression <% end %>", fn ->
-        EEx.compile_string("foo <% if true do %><% end %><% end %>")
-      end
-    end
-
-    test "when middle expression has a modifier" do
-      assert ExUnit.CaptureIO.capture_io(:stderr, fn ->
-               EEx.compile_string("foo <%= if true do %>true<%= else %>false<% end %>")
-             end) =~ ~s[unexpected beginning of EEx tag \"<%=\" on \"<%= else %>\"]
-    end
-
-    test "when end expression has a modifier" do
-      assert ExUnit.CaptureIO.capture_io(:stderr, fn ->
-               EEx.compile_string("foo <%= if true do %>true<% else %>false<%= end %>")
-             end) =~
-               ~s[unexpected beginning of EEx tag \"<%=\" on end of expression \"<%= end %>\"]
-    end
-
-    test "when trying to use marker '/' without implementation" do
-      msg =
-        ~r/unsupported EEx syntax <%\/ %> \(the syntax is valid but not supported by the current EEx engine\)/
-
-      assert_raise EEx.SyntaxError, msg, fn ->
-        EEx.compile_string("<%/ true %>")
-      end
-    end
-
-    test "when trying to use marker '|' without implementation" do
-      msg =
-        ~r/unsupported EEx syntax <%| %> \(the syntax is valid but not supported by the current EEx engine\)/
-
-      assert_raise EEx.SyntaxError, msg, fn ->
-        EEx.compile_string("<%| true %>")
-      end
-    end
-  end
-
-  describe "environment" do
-    test "respects line numbers" do
-      expected = """
-      foo
-      2
-      """
-
-      string = """
-      foo
-      <%= __ENV__.line %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "respects line numbers inside nested expressions" do
-      expected = """
-      foo
-
-      3
-
-      5
-      """
-
-      string = """
-      foo
-      <%= if true do %>
-      <%= __ENV__.line %>
-      <% end %>
-      <%= __ENV__.line %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "respects line numbers inside start expression" do
-      expected = """
-      foo
-
-      true
-
-      5
-      """
-
-      string = """
-      foo
-      <%= if __ENV__.line == 2 do %>
-      <%= true %>
-      <% end %>
-      <%= __ENV__.line %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "respects line numbers inside middle expression with ->" do
-      expected = """
-      foo
-
-      true
-
-      7
-      """
-
-      string = """
-      foo
-      <%= cond do %>
-      <% false -> %> false
-      <% __ENV__.line == 4 -> %>
-      <%= true %>
-      <% end %>
-      <%= __ENV__.line %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "respects line number inside middle expressions with keywords" do
-      expected = """
-      foo
-
-      5
-
-      7
-      """
-
-      string = """
-      foo
-      <%= if false do %>
-      <%= __ENV__.line %>
-      <% else %>
-      <%= __ENV__.line %>
-      <% end %>
-      <%= __ENV__.line %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "respects files" do
-      assert_eval("sample.ex", "<%= __ENV__.file %>", [], file: "sample.ex")
-    end
-  end
-
-  describe "clauses" do
-    test "inside functions" do
-      expected = """
-
-      Number 1
-
-      Number 2
-
-      Number 3
-
-      """
-
-      string = """
-      <%= Enum.map [1, 2, 3], fn x -> %>
-      Number <%= x %>
-      <% end %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "inside cond" do
-      expected = """
-      foo
-
-      true
-
-      """
-
-      string = """
-      foo
-      <%= cond do %>
-      <% false -> %> false
-      <% fn -> 1 end -> %>
-      <%= true %>
-      <% end %>
-      """
-
-      assert_eval(expected, string)
-    end
-
-    test "inside cond with do end" do
-      string = """
-      <% y = ["a", "b", "c"] %>
-      <%= cond do %>
-       <% "a" in y -> %>
-        Good
-       <% true -> %>
-        <% if true do %>true<% else %>false<% end %>
-        Bad
-      <% end %>
-      """
-
-      assert_eval("\n\n  Good\n \n", string)
-    end
-  end
-
-  describe "buffers" do
-    test "unused buffers are kept out" do
-      string = """
-      <%= 123 %>
-      <% if true do %>
-        <%= 456 %>
-      <% end %>
-      <%= 789 %>
-      """
-
-      assert_eval("123\n\n789\n", string)
-    end
-
-    test "inside comprehensions" do
-      string = """
-      <%= for _name <- packages || [] do %>
-      <% end %>
-      <%= all || :done %>
-      """
-
-      assert_eval("\ndone\n", string, packages: nil, all: nil)
-    end
-  end
-
-  describe "from file" do
-    test "evaluates the source" do
-      filename = Path.join(__DIR__, "fixtures/eex_template.eex")
-      result = EEx.eval_file(filename)
-      assert_normalized_newline_equal("foo bar.\n", result)
-    end
-
-    test "evaluates the source with bindings" do
-      filename = Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")
-      result = EEx.eval_file(filename, bar: 1)
-      assert_normalized_newline_equal("foo 1\n", result)
-    end
-
-    test "raises an Exception when file is missing" do
-      msg = "could not read file \"non-existent.eex\": no such file or directory"
-
-      assert_raise File.Error, msg, fn ->
-        filename = "non-existent.eex"
-        EEx.compile_file(filename)
-      end
-    end
-
-    test "sets external resource attribute" do
-      assert EExTest.Compiled.__info__(:attributes)[:external_resource] ==
-               [Path.join(__DIR__, "fixtures/eex_template_with_bindings.eex")]
-    end
-  end
-
-  describe "precompiled" do
-    test "from string" do
-      assert EExTest.Compiled.string_sample(1, 2) == "3"
-    end
-
-    test "from file" do
-      assert_normalized_newline_equal("foo 1\n", EExTest.Compiled.file_sample(1))
-      assert_normalized_newline_equal("foo 1\n", EExTest.Compiled.public_file_sample(1))
-    end
-
-    test "from file does not affect backtrace" do
-      file = to_charlist(Path.relative_to_cwd(__ENV__.file))
-
-      assert EExTest.Compiled.before_compile() ==
-               {7, {EExTest.Compiled, :before_compile, 0, [file: file, line: 7]}}
-
-      assert EExTest.Compiled.after_compile() ==
-               {21, {EExTest.Compiled, :after_compile, 0, [file: file, line: 21]}}
-
-      assert EExTest.Compiled.unknown() ==
-               {26, {EExTest.Compiled, :unknown, 0, [file: 'unknown', line: 26]}}
-    end
-  end
-
-  defmodule TestEngine do
-    @behaviour EEx.Engine
-
-    def init(_opts) do
-      "INIT"
-    end
-
-    def handle_body(body) do
-      "BODY(#{body})"
-    end
-
-    def handle_begin(_) do
-      "BEGIN"
-    end
-
-    def handle_end(buffer) do
-      buffer <> ":END"
-    end
-
-    def handle_text(buffer, text) do
-      buffer <> ":TEXT(#{String.trim(text)})"
-    end
-
-    def handle_expr(buffer, "/", expr) do
-      buffer <> ":DIV(#{Macro.to_string(expr)})"
-    end
-
-    def handle_expr(buffer, "=", expr) do
-      buffer <> ":EQUAL(#{Macro.to_string(expr)})"
-    end
-
-    def handle_expr(buffer, mark, expr) do
-      EEx.Engine.handle_expr(buffer, mark, expr)
-    end
-  end
-
-  describe "custom engines" do
-    test "text" do
-      assert_eval("BODY(INIT:TEXT(foo))", "foo", [], engine: TestEngine)
-    end
-
-    test "custom marker" do
-      assert_eval("BODY(INIT:TEXT(foo):DIV(:bar))", "foo <%/ :bar %>", [], engine: TestEngine)
-    end
-
-    test "begin/end" do
-      assert_eval(
-        ~s[BODY(INIT:TEXT(foo):EQUAL(if do\n  "BEGIN:TEXT(this):END"\nelse\n  "BEGIN:TEXT(that):END"\nend))],
-        "foo <%= if do %>this<% else %>that<% end %>",
-        [],
-        engine: TestEngine
-      )
-    end
-
-    test "not implemented custom marker" do
-      msg =
-        ~r/unsupported EEx syntax <%| %> \(the syntax is valid but not supported by the current EEx engine\)/
-
-      assert_raise EEx.SyntaxError, msg, fn ->
-        assert_eval({:wrapped, "foo baz"}, "foo <%| :bar %>", [], engine: TestEngine)
-      end
-    end
-  end
-
-  defp assert_eval(expected, actual, binding \\ [], opts \\ []) do
-    opts = Keyword.merge([file: __ENV__.file, engine: opts[:engine] || EEx.Engine], opts)
-    result = EEx.eval_string(actual, binding, opts)
-    assert result == expected
-  end
-
-  defp assert_normalized_newline_equal(expected, actual) do
-    assert String.replace(expected, "\r\n", "\n") == String.replace(actual, "\r\n", "\n")
-  end
-end

lib/eex/test/fixtures/eex_template.eex

@@ -1 +0,0 @@
-foo <%= if true do %>bar.<% end %>

lib/eex/test/fixtures/eex_template_with_bindings.eex

@@ -1 +0,0 @@
-foo <%= bar %>

lib/eex/test/test_helper.exs

@@ -1 +0,0 @@
-ExUnit.start(trace: "--trace" in System.argv())

lib/elixir/Emakefile

@@ -1,17 +0,0 @@
-{'src/*', [
-  warn_unused_vars,
-  warn_export_all,
-  warn_shadow_vars,
-  warn_unused_import,
-  warn_unused_function,
-  warn_bif_clash,
-  warn_unused_record,
-  warn_deprecated_function,
-  warn_obsolete_guard,
-  warn_exported_vars,
-  %% warn_missing_spec,
-  %% warn_untyped_record,
-  warnings_as_errors,
-  debug_info,
-  {outdir, "ebin/"}
-]}.

lib/elixir/docs.exs

@@ -1,99 +0,0 @@
-# Returns config for Elixir docs
-[
-  extras: Path.wildcard("lib/elixir/pages/*.md"),
-  groups_for_functions: [
-    Guards: & &1[:guard] == true
-  ],
-  skip_undefined_reference_warnings_on: ["compatibility-and-deprecations"],
-  groups_for_modules: [
-    # [Kernel, Kernel.SpecialForms],
-
-    "Basic Types": [
-      Atom,
-      Base,
-      Bitwise,
-      Calendar,
-      Date,
-      DateTime,
-      Exception,
-      Float,
-      Function,
-      Integer,
-      NaiveDateTime,
-      Record,
-      Regex,
-      String,
-      Time,
-      Tuple,
-      URI,
-      Version
-    ],
-    "Collections & Enumerables": [
-      Access,
-      Date.Range,
-      Enum,
-      Keyword,
-      List,
-      Map,
-      MapSet,
-      Range,
-      Stream
-    ],
-    "IO & System": [
-      File,
-      File.Stat,
-      File.Stream,
-      IO,
-      IO.ANSI,
-      IO.Stream,
-      OptionParser,
-      Path,
-      Port,
-      StringIO,
-      System
-    ],
-    "Calendar": [
-      Calendar.ISO,
-      Calendar.TimeZoneDatabase,
-      Calendar.UTCOnlyTimeZoneDatabase
-    ],
-    "Modules & Code": [
-      Code,
-      Kernel.ParallelCompiler,
-      Macro,
-      Macro.Env,
-      Module
-    ],
-    "Processes & Applications": [
-      Agent,
-      Application,
-      DynamicSupervisor,
-      GenServer,
-      Node,
-      Process,
-      Registry,
-      Supervisor,
-      Task,
-      Task.Supervisor
-    ],
-    Protocols: [
-      Collectable,
-      Enumerable,
-      Inspect,
-      Inspect.Algebra,
-      Inspect.Opts,
-      List.Chars,
-      Protocol,
-      String.Chars
-    ],
-    Deprecated: [
-      Behaviour,
-      Dict,
-      GenEvent,
-      HashDict,
-      HashSet,
-      Set,
-      Supervisor.Spec
-    ]
-  ]
-]

lib/elixir/generate_app.escript

@@ -1,13 +0,0 @@
-#!/usr/bin/env escript
-%% -*- erlang -*-
-
-main([Source, Target, Version]) ->
-  {ok, [{application, Name, Props0}]} = file:consult(Source),
-  Ebin = filename:dirname(Target),
-  Files = filelib:wildcard(filename:join(Ebin, "*.beam")),
-  Mods = [list_to_atom(filename:basename(F, ".beam")) || F <- Files],
-  Props1 = lists:keyreplace(modules, 1, Props0, {modules, Mods}),
-  Props = lists:keyreplace(vsn, 1, Props1, {vsn, Version}),
-  AppDef = io_lib:format("~tp.~n", [{application, Name, Props}]),
-  ok = file:write_file(Target, AppDef),
-  io:format("Generated ~ts.app~n", [Name]).

lib/elixir/lib/access.ex

@@ -1,816 +0,0 @@
-defmodule Access do
-  @moduledoc """
-  Key-based access to data structures.
-
-  Elixir supports three main key-value constructs: keywords,
-  maps, and structs. It also supports two mechanisms to access those keys:
-  by brackets (via `data[key]`) and by dot-syntax (via `data.field`).
-
-  In the next section we will briefly recap the key-value constructs and then
-  discuss the access mechanisms.
-
-  ## Key-value constructs
-
-  Elixir provides three main key-value constructs, summarized below:
-
-    * keyword lists - they are lists of two-element tuples where
-      the first element is an atom. Commonly written in the
-      `[key: value]` syntax, they support only atom keys. Keyword
-      lists are used almost exclusively to pass options to functions
-      and macros. They keep the user ordering and allow duplicate
-      keys. See the `Keyword` module.
-
-    * maps - they are the "go to" key-value data structure in Elixir.
-      They are capable of supporting billions of keys of any type. They are
-      written using the `%{key => value}` syntax and also support the
-      `%{key: value}` syntax when the keys are atoms. They do not
-      have any specified ordering and do not allow duplicate keys.
-      See the `Map` module.
-
-    * structs - they are named maps with a pre-determined set of keys.
-      They are defined with `defstruct/1` and written using the
-      `%StructName{key: value}` syntax.
-
-  ## Key-based accessors
-
-  Elixir provides two mechanisms to access data structures by key,
-  described next.
-
-  ### Bracket-based access
-
-  The `data[key]` syntax is used to access data structures with a
-  dynamic number of keys, such as keywords and maps. The key can
-  be of any type. The bracket-based access syntax returns `nil`
-  if the key does not exist:
-
-      iex> keywords = [a: 1, b: 2]
-      iex> keywords[:a]
-      1
-      iex> keywords[:c]
-      nil
-
-      iex> map = %{a: 1, b: 2}
-      iex> map[:a]
-      1
-
-      iex> star_ratings = %{1.0 => "★", 1.5 => "★☆", 2.0 => "★★"}
-      iex> star_ratings[1.5]
-      "★☆"
-
-  This syntax is very convenient as it can be nested arbitrarily:
-
-      iex> users = %{"john" => %{age: 27}, "meg" => %{age: 23}}
-      iex> put_in(users["john"][:age], 28)
-      %{"john" => %{age: 28}, "meg" => %{age: 23}}
-
-  Furthermore, the bracket-based access syntax transparently ignores
-  `nil` values. When trying to access anything on a `nil` value, `nil`
-  is returned:
-
-      iex> keywords = [a: 1, b: 2]
-      iex> keywords[:c][:unknown]
-      nil
-
-      iex> nil[:a]
-      nil
-
-  Internally, `data[key]` translates  to `Access.get(term, key, nil)`.
-  Developers interested in implementing their own key-value data
-  structures can implement the `Access` behaviour to provide the
-  bracket-based access syntax. `Access` requires the key comparison
-  to be implemented using the `===/2` operator.
-
-  ### Dot-based syntax
-
-  The `data.field` syntax is used exclusively to access atom fields
-  in maps and structs. If the accessed field does not exist, an error is
-  raised. This is a deliberate decision: since all of the
-  fields in a struct are pre-determined, structs support only the
-  dot-based syntax and not the access one.
-
-  Imagine a struct named `User` with a `:name` field. The following would raise:
-
-      user = %User{name: "John"}
-      user[:name]
-      # ** (UndefinedFunctionError) undefined function User.fetch/2 (User does not implement the Access behaviour)
-
-  Instead we should use the `user.name` syntax to access fields:
-
-      user.name
-      #=> "John"
-
-  Differently from `user[:name]`, `user.name` is not extensible via
-  a behaviour and is restricted only to structs and atom keys in maps.
-
-  ### Summing up
-
-  The bracket-based syntax, `user[:name]`, is used by dynamic structures,
-  is extensible and returns nil on missing keys.
-
-  The dot-based syntax, `user.name`, is used exclusively to access atom
-  keys in maps and structs, and it raises on missing keys.
-
-  ## Nested data structures
-
-  Both key-based access syntaxes can be used with the nested update
-  functions and macros in `Kernel`, such as `Kernel.get_in/2`, `Kernel.put_in/3`,
-  `Kernel.update_in/3`, `Kernel.pop_in/2`, and `Kernel.get_and_update_in/3`.
-
-  For example, to update a map inside another map:
-
-      iex> users = %{"john" => %{age: 27}, "meg" => %{age: 23}}
-      iex> put_in(users["john"].age, 28)
-      %{"john" => %{age: 28}, "meg" => %{age: 23}}
-
-  This module provides convenience functions for traversing other
-  structures, like tuples and lists. These functions can be used
-  in all the `Access`-related functions and macros in `Kernel`.
-
-  For instance, given a user map with the `:name` and `:languages` keys,
-  here is how to deeply traverse the map and convert all language names
-  to uppercase:
-
-      iex> languages = [
-      ...>   %{name: "elixir", type: :functional},
-      ...>   %{name: "c", type: :procedural}
-      ...> ]
-      iex> user = %{name: "john", languages: languages}
-      iex> update_in(user, [:languages, Access.all(), :name], &String.upcase/1)
-      %{
-        name: "john",
-        languages: [
-          %{name: "ELIXIR", type: :functional},
-          %{name: "C", type: :procedural}
-        ]
-      }
-
-  See the functions `key/1`, `key!/1`, `elem/1`, and `all/0` for some of the
-  available accessors.
-  """
-
-  @type container :: keyword | struct | map
-  @type nil_container :: nil
-  @type any_container :: any
-  @type t :: container | nil_container | any_container
-  @type key :: any
-  @type value :: any
-
-  @type get_fun(data, get_value) ::
-          (:get, data, (term -> term) ->
-             {get_value, new_data :: container})
-
-  @type get_and_update_fun(data, get_value) ::
-          (:get_and_update, data, (term -> term) ->
-             {get_value, new_data :: container} | :pop)
-
-  @type access_fun(data, get_value) ::
-          get_fun(data, get_value) | get_and_update_fun(data, get_value)
-
-  @doc """
-  Invoked in order to access the value stored under `key` in the given term `term`.
-
-  This function should return `{:ok, value}` where `value` is the value under
-  `key` if the key exists in the term, or `:error` if the key does not exist in
-  the term.
-
-  Many of the functions defined in the `Access` module internally call this
-  function. This function is also used when the square-brackets access syntax
-  (`structure[key]`) is used: the `fetch/2` callback implemented by the module
-  that defines the `structure` struct is invoked and if it returns `{:ok,
-  value}` then `value` is returned, or if it returns `:error` then `nil` is
-  returned.
-
-  See the `Map.fetch/2` and `Keyword.fetch/2` implementations for examples of
-  how to implement this callback.
-  """
-  @callback fetch(term :: t, key) :: {:ok, value} | :error
-
-  @doc """
-  Invoked in order to access the value under `key` and update it at the same time.
-
-  The implementation of this callback should invoke `fun` with the value under
-  `key` in the passed structure `data`, or with `nil` if `key` is not present in it.
-  This function must return either `{get_value, update_value}` or `:pop`.
-
-  If the passed function returns `{get_value, update_value}`,
-  the return value of this callback should be `{get_value, new_data}`, where:
-
-    * `get_value` is the retrieved value (which can be operated on before being returned)
-
-    * `update_value` is the new value to be stored under `key`
-
-    * `new_data` is `data` after updating the value of `key` with `update_value`.
-
-  If the passed function returns `:pop`, the return value of this callback
-  must be `{value, new_data}` where `value` is the value under `key`
-  (or `nil` if not present) and `new_data` is `data` without `key`.
-
-  See the implementations of `Map.get_and_update/3` or `Keyword.get_and_update/3`
-  for more examples.
-  """
-  @callback get_and_update(data, key, (value -> {get_value, value} | :pop)) :: {get_value, data}
-            when get_value: var, data: container | any_container
-
-  @doc """
-  Invoked to "pop" the value under `key` out of the given data structure.
-
-  When `key` exists in the given structure `data`, the implementation should
-  return a `{value, new_data}` tuple where `value` is the value that was under
-  `key` and `new_data` is `term` without `key`.
-
-  When `key` is not present in the given structure, a tuple `{value, data}`
-  should be returned, where `value` is implementation-defined.
-
-  See the implementations for `Map.pop/3` or `Keyword.pop/3` for more examples.
-  """
-  @callback pop(data, key) :: {value, data} when data: container | any_container
-
-  defmacrop raise_undefined_behaviour(exception, module, top) do
-    quote do
-      exception =
-        case __STACKTRACE__ do
-          [unquote(top) | _] ->
-            reason = "#{inspect(unquote(module))} does not implement the Access behaviour"
-            %{unquote(exception) | reason: reason}
-
-          _ ->
-            unquote(exception)
-        end
-
-      reraise exception, __STACKTRACE__
-    end
-  end
-
-  @doc """
-  Fetches the value for the given key in a container (a map, keyword
-  list, or struct that implements the `Access` behaviour).
-
-  Returns `{:ok, value}` where `value` is the value under `key` if there is such
-  a key, or `:error` if `key` is not found.
-
-  ## Examples
-
-      iex> Access.fetch(%{name: "meg", age: 26}, :name)
-      {:ok, "meg"}
-
-      iex> Access.fetch([ordered: true, on_timeout: :exit], :timeout)
-      :error
-
-  """
-  @spec fetch(container, term) :: {:ok, term} | :error
-  @spec fetch(nil_container, any) :: :error
-  def fetch(container, key)
-
-  def fetch(%module{} = container, key) do
-    module.fetch(container, key)
-  rescue
-    exception in UndefinedFunctionError ->
-      raise_undefined_behaviour(exception, module, {^module, :fetch, [^container, ^key], _})
-  end
-
-  def fetch(map, key) when is_map(map) do
-    case map do
-      %{^key => value} -> {:ok, value}
-      _ -> :error
-    end
-  end
-
-  def fetch(list, key) when is_list(list) and is_atom(key) do
-    case :lists.keyfind(key, 1, list) do
-      {_, value} -> {:ok, value}
-      false -> :error
-    end
-  end
-
-  def fetch(list, key) when is_list(list) do
-    raise ArgumentError,
-          "the Access calls for keywords expect the key to be an atom, got: " <> inspect(key)
-  end
-
-  def fetch(nil, _key) do
-    :error
-  end
-
-  @doc """
-  Gets the value for the given key in a container (a map, keyword
-  list, or struct that implements the `Access` behaviour).
-
-  Returns the value under `key` if there is such a key, or `default` if `key` is
-  not found.
-
-  ## Examples
-
-      iex> Access.get(%{name: "john"}, :name, "default name")
-      "john"
-      iex> Access.get(%{name: "john"}, :age, 25)
-      25
-
-      iex> Access.get([ordered: true], :timeout)
-      nil
-
-  """
-  @spec get(container, term, term) :: term
-  @spec get(nil_container, any, default) :: default when default: var
-  def get(container, key, default \\ nil)
-
-  # Reimplementing the same logic as Access.fetch/2 here is done for performance, since
-  # this is called a lot and calling fetch/2 means introducing some overhead (like
-  # building the "{:ok, _}" tuple and deconstructing it back right away).
-
-  def get(%module{} = container, key, default) do
-    try do
-      module.fetch(container, key)
-    rescue
-      exception in UndefinedFunctionError ->
-        raise_undefined_behaviour(exception, module, {^module, :fetch, [^container, ^key], _})
-    else
-      {:ok, value} -> value
-      :error -> default
-    end
-  end
-
-  def get(map, key, default) when is_map(map) do
-    case map do
-      %{^key => value} -> value
-      _ -> default
-    end
-  end
-
-  def get(list, key, default) when is_list(list) and is_atom(key) do
-    case :lists.keyfind(key, 1, list) do
-      {_, value} -> value
-      false -> default
-    end
-  end
-
-  def get(list, key, _default) when is_list(list) do
-    raise ArgumentError,
-          "the Access calls for keywords expect the key to be an atom, got: " <> inspect(key)
-  end
-
-  def get(nil, _key, default) do
-    default
-  end
-
-  @doc """
-  Gets and updates the given key in a `container` (a map, a keyword list,
-  a struct that implements the `Access` behaviour).
-
-  The `fun` argument receives the value of `key` (or `nil` if `key` is not
-  present in `container`) and must return a two-element tuple `{get_value, update_value}`:
-  the "get" value `get_value` (the retrieved value, which can be operated on before
-  being returned) and the new value to be stored under `key` (`update_value`).
-  `fun` may also return `:pop`, which means the current value
-  should be removed from the container and returned.
-
-  The returned value is a two-element tuple with the "get" value returned by
-  `fun` and a new container with the updated value under `key`.
-  """
-  @spec get_and_update(data, key, (value -> {get_value, value} | :pop)) :: {get_value, data}
-        when get_value: var, data: container
-  def get_and_update(container, key, fun)
-
-  def get_and_update(%module{} = container, key, fun) do
-    module.get_and_update(container, key, fun)
-  rescue
-    exception in UndefinedFunctionError ->
-      raise_undefined_behaviour(
-        exception,
-        module,
-        {^module, :get_and_update, [^container, ^key, ^fun], _}
-      )
-  end
-
-  def get_and_update(map, key, fun) when is_map(map) do
-    Map.get_and_update(map, key, fun)
-  end
-
-  def get_and_update(list, key, fun) when is_list(list) do
-    Keyword.get_and_update(list, key, fun)
-  end
-
-  def get_and_update(nil, key, _fun) do
-    raise ArgumentError, "could not put/update key #{inspect(key)} on a nil value"
-  end
-
-  @doc """
-  Removes the entry with a given key from a container (a map, keyword
-  list, or struct that implements the `Access` behaviour).
-
-  Returns a tuple containing the value associated with the key and the
-  updated container. `nil` is returned for the value if the key isn't
-  in the container.
-
-  ## Examples
-
-  With a map:
-
-      iex> Access.pop(%{name: "Elixir", creator: "Valim"}, :name)
-      {"Elixir", %{creator: "Valim"}}
-
-  A keyword list:
-
-      iex> Access.pop([name: "Elixir", creator: "Valim"], :name)
-      {"Elixir", [creator: "Valim"]}
-
-  An unknown key:
-
-      iex> Access.pop(%{name: "Elixir", creator: "Valim"}, :year)
-      {nil, %{creator: "Valim", name: "Elixir"}}
-
-  """
-  @spec pop(data, key) :: {value, data} when data: container
-  def pop(%module{} = container, key) do
-    module.pop(container, key)
-  rescue
-    exception in UndefinedFunctionError ->
-      raise_undefined_behaviour(exception, module, {^module, :pop, [^container, ^key], _})
-  end
-
-  def pop(map, key) when is_map(map) do
-    Map.pop(map, key)
-  end
-
-  def pop(list, key) when is_list(list) do
-    Keyword.pop(list, key)
-  end
-
-  def pop(nil, key) do
-    raise ArgumentError, "could not pop key #{inspect(key)} on a nil value"
-  end
-
-  ## Accessors
-
-  @doc """
-  Returns a function that accesses the given key in a map/struct.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  The returned function uses the default value if the key does not exist.
-  This can be used to specify defaults and safely traverse missing keys:
-
-      iex> get_in(%{}, [Access.key(:user, %{name: "meg"}), Access.key(:name)])
-      "meg"
-
-  Such is also useful when using update functions, allowing us to introduce
-  values as we traverse the data structure for updates:
-
-      iex> put_in(%{}, [Access.key(:user, %{}), Access.key(:name)], "Mary")
-      %{user: %{name: "Mary"}}
-
-  ## Examples
-
-      iex> map = %{user: %{name: "john"}}
-      iex> get_in(map, [Access.key(:unknown, %{}), Access.key(:name, "john")])
-      "john"
-      iex> get_and_update_in(map, [Access.key(:user), Access.key(:name)], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {"john", %{user: %{name: "JOHN"}}}
-      iex> pop_in(map, [Access.key(:user), Access.key(:name)])
-      {"john", %{user: %{}}}
-
-  An error is raised if the accessed structure is not a map or a struct:
-
-      iex> get_in(nil, [Access.key(:foo)])
-      ** (BadMapError) expected a map, got: nil
-
-      iex> get_in([], [Access.key(:foo)])
-      ** (BadMapError) expected a map, got: []
-
-  """
-  @spec key(key, term) :: access_fun(data :: struct | map, get_value :: term)
-  def key(key, default \\ nil) do
-    fn
-      :get, data, next ->
-        next.(Map.get(data, key, default))
-
-      :get_and_update, data, next ->
-        value = Map.get(data, key, default)
-
-        case next.(value) do
-          {get, update} -> {get, Map.put(data, key, update)}
-          :pop -> {value, Map.delete(data, key)}
-        end
-    end
-  end
-
-  @doc """
-  Returns a function that accesses the given key in a map/struct.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  Similar to `key/2`, but the returned function raises if the key does not exist.
-
-  ## Examples
-
-      iex> map = %{user: %{name: "john"}}
-      iex> get_in(map, [Access.key!(:user), Access.key!(:name)])
-      "john"
-      iex> get_and_update_in(map, [Access.key!(:user), Access.key!(:name)], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {"john", %{user: %{name: "JOHN"}}}
-      iex> pop_in(map, [Access.key!(:user), Access.key!(:name)])
-      {"john", %{user: %{}}}
-      iex> get_in(map, [Access.key!(:user), Access.key!(:unknown)])
-      ** (KeyError) key :unknown not found in: %{name: \"john\"}
-
-  An error is raised if the accessed structure is not a map/struct:
-
-      iex> get_in([], [Access.key!(:foo)])
-      ** (RuntimeError) Access.key!/1 expected a map/struct, got: []
-
-  """
-  @spec key!(key) :: access_fun(data :: struct | map, get_value :: term)
-  def key!(key) do
-    fn
-      :get, %{} = data, next ->
-        next.(Map.fetch!(data, key))
-
-      :get_and_update, %{} = data, next ->
-        value = Map.fetch!(data, key)
-
-        case next.(value) do
-          {get, update} -> {get, Map.put(data, key, update)}
-          :pop -> {value, Map.delete(data, key)}
-        end
-
-      _op, data, _next ->
-        raise "Access.key!/1 expected a map/struct, got: #{inspect(data)}"
-    end
-  end
-
-  @doc ~S"""
-  Returns a function that accesses the element at the given index in a tuple.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  The returned function raises if `index` is out of bounds.
-
-  Note that popping elements out of tuples is not possible and raises an
-  error.
-
-  ## Examples
-
-      iex> map = %{user: {"john", 27}}
-      iex> get_in(map, [:user, Access.elem(0)])
-      "john"
-      iex> get_and_update_in(map, [:user, Access.elem(0)], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {"john", %{user: {"JOHN", 27}}}
-      iex> pop_in(map, [:user, Access.elem(0)])
-      ** (RuntimeError) cannot pop data from a tuple
-
-  An error is raised if the accessed structure is not a tuple:
-
-      iex> get_in(%{}, [Access.elem(0)])
-      ** (RuntimeError) Access.elem/1 expected a tuple, got: %{}
-
-  """
-  @spec elem(non_neg_integer) :: access_fun(data :: tuple, get_value :: term)
-  def elem(index) when is_integer(index) and index >= 0 do
-    pos = index + 1
-
-    fn
-      :get, data, next when is_tuple(data) ->
-        next.(:erlang.element(pos, data))
-
-      :get_and_update, data, next when is_tuple(data) ->
-        value = :erlang.element(pos, data)
-
-        case next.(value) do
-          {get, update} -> {get, :erlang.setelement(pos, data, update)}
-          :pop -> raise "cannot pop data from a tuple"
-        end
-
-      _op, data, _next ->
-        raise "Access.elem/1 expected a tuple, got: #{inspect(data)}"
-    end
-  end
-
-  @doc ~S"""
-  Returns a function that accesses all the elements in a list.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  ## Examples
-
-      iex> list = [%{name: "john"}, %{name: "mary"}]
-      iex> get_in(list, [Access.all(), :name])
-      ["john", "mary"]
-      iex> get_and_update_in(list, [Access.all(), :name], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {["john", "mary"], [%{name: "JOHN"}, %{name: "MARY"}]}
-      iex> pop_in(list, [Access.all(), :name])
-      {["john", "mary"], [%{}, %{}]}
-
-  Here is an example that traverses the list dropping even
-  numbers and multiplying odd numbers by 2:
-
-      iex> require Integer
-      iex> get_and_update_in([1, 2, 3, 4, 5], [Access.all()], fn num ->
-      ...>   if Integer.is_even(num), do: :pop, else: {num, num * 2}
-      ...> end)
-      {[1, 2, 3, 4, 5], [2, 6, 10]}
-
-  An error is raised if the accessed structure is not a list:
-
-      iex> get_in(%{}, [Access.all()])
-      ** (RuntimeError) Access.all/0 expected a list, got: %{}
-
-  """
-  @spec all() :: access_fun(data :: list, get_value :: list)
-  def all() do
-    &all/3
-  end
-
-  defp all(:get, data, next) when is_list(data) do
-    Enum.map(data, next)
-  end
-
-  defp all(:get_and_update, data, next) when is_list(data) do
-    all(data, next, _gets = [], _updates = [])
-  end
-
-  defp all(_op, data, _next) do
-    raise "Access.all/0 expected a list, got: #{inspect(data)}"
-  end
-
-  defp all([head | rest], next, gets, updates) do
-    case next.(head) do
-      {get, update} -> all(rest, next, [get | gets], [update | updates])
-      :pop -> all(rest, next, [head | gets], updates)
-    end
-  end
-
-  defp all([], _next, gets, updates) do
-    {:lists.reverse(gets), :lists.reverse(updates)}
-  end
-
-  @doc ~S"""
-  Returns a function that accesses the element at `index` (zero based) of a list.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  ## Examples
-
-      iex> list = [%{name: "john"}, %{name: "mary"}]
-      iex> get_in(list, [Access.at(1), :name])
-      "mary"
-      iex> get_and_update_in(list, [Access.at(0), :name], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {"john", [%{name: "JOHN"}, %{name: "mary"}]}
-
-  `at/1` can also be used to pop elements out of a list or
-  a key inside of a list:
-
-      iex> list = [%{name: "john"}, %{name: "mary"}]
-      iex> pop_in(list, [Access.at(0)])
-      {%{name: "john"}, [%{name: "mary"}]}
-      iex> pop_in(list, [Access.at(0), :name])
-      {"john", [%{}, %{name: "mary"}]}
-
-  When the index is out of bounds, `nil` is returned and the update function is never called:
-
-      iex> list = [%{name: "john"}, %{name: "mary"}]
-      iex> get_in(list, [Access.at(10), :name])
-      nil
-      iex> get_and_update_in(list, [Access.at(10), :name], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {nil, [%{name: "john"}, %{name: "mary"}]}
-
-  An error is raised for negative indexes:
-
-      iex> get_in([], [Access.at(-1)])
-      ** (FunctionClauseError) no function clause matching in Access.at/1
-
-  An error is raised if the accessed structure is not a list:
-
-      iex> get_in(%{}, [Access.at(1)])
-      ** (RuntimeError) Access.at/1 expected a list, got: %{}
-
-  """
-  @spec at(non_neg_integer) :: access_fun(data :: list, get_value :: term)
-  def at(index) when is_integer(index) and index >= 0 do
-    fn op, data, next -> at(op, data, index, next) end
-  end
-
-  defp at(:get, data, index, next) when is_list(data) do
-    data |> Enum.at(index) |> next.()
-  end
-
-  defp at(:get_and_update, data, index, next) when is_list(data) do
-    get_and_update_at(data, index, next, [])
-  end
-
-  defp at(_op, data, _index, _next) do
-    raise "Access.at/1 expected a list, got: #{inspect(data)}"
-  end
-
-  defp get_and_update_at([head | rest], 0, next, updates) do
-    case next.(head) do
-      {get, update} -> {get, :lists.reverse([update | updates], rest)}
-      :pop -> {head, :lists.reverse(updates, rest)}
-    end
-  end
-
-  defp get_and_update_at([head | rest], index, next, updates) do
-    get_and_update_at(rest, index - 1, next, [head | updates])
-  end
-
-  defp get_and_update_at([], _index, _next, updates) do
-    {nil, :lists.reverse(updates)}
-  end
-
-  @doc ~S"""
-  Returns a function that accesses all elements of a list that match the provided predicate.
-
-  The returned function is typically passed as an accessor to `Kernel.get_in/2`,
-  `Kernel.get_and_update_in/3`, and friends.
-
-  ## Examples
-
-      iex> list = [%{name: "john", salary: 10}, %{name: "francine", salary: 30}]
-      iex> get_in(list, [Access.filter(&(&1.salary > 20)), :name])
-      ["francine"]
-      iex> get_and_update_in(list, [Access.filter(&(&1.salary <= 20)), :name], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {["john"], [%{name: "JOHN", salary: 10}, %{name: "francine", salary: 30}]}
-
-  `filter/1` can also be used to pop elements out of a list or
-  a key inside of a list:
-
-      iex> list = [%{name: "john", salary: 10}, %{name: "francine", salary: 30}]
-      iex> pop_in(list, [Access.filter(&(&1.salary >= 20))])
-      {[%{name: "francine", salary: 30}], [%{name: "john", salary: 10}]}
-      iex> pop_in(list, [Access.filter(&(&1.salary >= 20)), :name])
-      {["francine"], [%{name: "john", salary: 10}, %{salary: 30}]}
-
-  When no match is found, an empty list is returned and the update function is never called
-
-      iex> list = [%{name: "john", salary: 10}, %{name: "francine", salary: 30}]
-      iex> get_in(list, [Access.filter(&(&1.salary >= 50)), :name])
-      []
-      iex> get_and_update_in(list, [Access.filter(&(&1.salary >= 50)), :name], fn prev ->
-      ...>   {prev, String.upcase(prev)}
-      ...> end)
-      {[], [%{name: "john", salary: 10}, %{name: "francine", salary: 30}]}
-
-  An error is raised if the predicate is not a function or is of the incorrect arity:
-
-      iex> get_in([], [Access.filter(5)])
-      ** (FunctionClauseError) no function clause matching in Access.filter/1
-
-  An error is raised if the accessed structure is not a list:
-
-      iex> get_in(%{}, [Access.filter(fn a -> a == 10 end)])
-      ** (RuntimeError) Access.filter/1 expected a list, got: %{}
-
-  """
-  @doc since: "1.6.0"
-  @spec filter((term -> boolean)) :: access_fun(data :: list, get_value :: list)
-  def filter(func) when is_function(func) do
-    fn op, data, next -> filter(op, data, func, next) end
-  end
-
-  defp filter(:get, data, func, next) when is_list(data) do
-    data |> Enum.filter(func) |> Enum.map(next)
-  end
-
-  defp filter(:get_and_update, data, func, next) when is_list(data) do
-    get_and_update_filter(data, func, next, [], [])
-  end
-
-  defp filter(_op, data, _func, _next) do
-    raise "Access.filter/1 expected a list, got: #{inspect(data)}"
-  end
-
-  defp get_and_update_filter([head | rest], func, next, updates, gets) do
-    if func.(head) do
-      case next.(head) do
-        {get, update} ->
-          get_and_update_filter(rest, func, next, [update | updates], [get | gets])
-
-        :pop ->
-          get_and_update_filter(rest, func, next, updates, [head | gets])
-      end
-    else
-      get_and_update_filter(rest, func, next, [head | updates], gets)
-    end
-  end
-
-  defp get_and_update_filter([], _func, _next, updates, gets) do
-    {:lists.reverse(gets), :lists.reverse(updates)}
-  end
-end

lib/elixir/lib/agent.ex

@@ -1,435 +0,0 @@
-defmodule Agent do
-  @moduledoc """
-  Agents are a simple abstraction around state.
-
-  Often in Elixir there is a need to share or store state that
-  must be accessed from different processes or by the same process
-  at different points in time.
-
-  The `Agent` module provides a basic server implementation that
-  allows state to be retrieved and updated via a simple API.
-
-  ## Examples
-
-  For example, the following agent implements a counter:
-
-      defmodule Counter do
-        use Agent
-
-        def start_link do
-          Agent.start_link(fn -> 0 end, name: __MODULE__)
-        end
-
-        def value do
-          Agent.get(__MODULE__, & &1)
-        end
-
-        def increment do
-          Agent.update(__MODULE__, &(&1 + 1))
-        end
-      end
-
-  Usage would be:
-
-      Counter.start_link
-
-      Counter.value     #=> 0
-      Counter.increment #=> :ok
-      Counter.increment #=> :ok
-      Counter.value     #=> 2
-
-  Thanks to the agent server process, the counter can be safely incremented
-  concurrently.
-
-  Agents provide a segregation between the client and server APIs (similar to
-  `GenServer`s). In particular, the functions passed as arguments to the calls to
-  `Agent` functions are invoked inside the agent (the server). This distinction
-  is important because you may want to avoid expensive operations inside the
-  agent, as they will effectively block the agent until the request is
-  fulfilled.
-
-  Consider these two examples:
-
-      # Compute in the agent/server
-      def get_something(agent) do
-        Agent.get(agent, fn state -> do_something_expensive(state) end)
-      end
-
-      # Compute in the agent/client
-      def get_something(agent) do
-        Agent.get(agent, & &1) |> do_something_expensive()
-      end
-
-  The first function blocks the agent. The second function copies all the state
-  to the client and then executes the operation in the client. One aspect to
-  consider is whether the data is large enough to require processing in the server,
-  at least initially, or small enough to be sent to the client cheaply. Another
-  factor is whether the data needs to be processed atomically: getting the
-  state and calling `do_something_expensive(state)` outside of the agent means
-  that the agent's state can be updated in the meantime. This is specially
-  important in case of updates as computing the new state in the client rather
-  than in the server can lead to race conditions if multiple clients are trying
-  to update the same state to different values.
-
-  Finally note that `use Agent` defines a `child_spec/1` function, allowing the
-  defined module to be put under a supervision tree. The generated
-  `child_spec/1` can be customized with the following options:
-
-    * `:id` - the child specification identifier, defaults to the current module
-    * `:start` - how to start the child process (defaults to calling `__MODULE__.start_link/1`)
-    * `:restart` - when the child should be restarted, defaults to `:permanent`
-    * `:shutdown` - how to shut down the child, either immediately or by giving it time to shut down
-
-  For example:
-
-      use Agent, restart: :transient, shutdown: 10_000
-
-  See the "Child specification" section in the `Supervisor` module for more
-  detailed information. The `@doc` annotation immediately preceding
-  `use Agent` will be attached to the generated `child_spec/1` function.
-
-  ## Name registration
-
-  An agent is bound to the same name registration rules as GenServers.
-  Read more about it in the `GenServer` documentation.
-
-  ## A word on distributed agents
-
-  It is important to consider the limitations of distributed agents. Agents
-  provide two APIs, one that works with anonymous functions and another
-  that expects an explicit module, function, and arguments.
-
-  In a distributed setup with multiple nodes, the API that accepts anonymous
-  functions only works if the caller (client) and the agent have the same
-  version of the caller module.
-
-  Keep in mind this issue also shows up when performing "rolling upgrades"
-  with agents. By rolling upgrades we mean the following situation: you wish
-  to deploy a new version of your software by *shutting down* some of your
-  nodes and replacing them with nodes running a new version of the software.
-  In this setup, part of your environment will have one version of a given
-  module and the other part another version (the newer one) of the same module.
-
-  The best solution is to simply use the explicit module, function, and arguments
-  APIs when working with distributed agents.
-
-  ## Hot code swapping
-
-  An agent can have its code hot swapped live by simply passing a module,
-  function, and arguments tuple to the update instruction. For example, imagine
-  you have an agent named `:sample` and you want to convert its inner state
-  from a keyword list to a map. It can be done with the following
-  instruction:
-
-      {:update, :sample, {:advanced, {Enum, :into, [%{}]}}}
-
-  The agent's state will be added to the given list of arguments (`[%{}]`) as
-  the first argument.
-  """
-
-  @typedoc "Return values of `start*` functions"
-  @type on_start :: {:ok, pid} | {:error, {:already_started, pid} | term}
-
-  @typedoc "The agent name"
-  @type name :: atom | {:global, term} | {:via, module, term}
-
-  @typedoc "The agent reference"
-  @type agent :: pid | {atom, node} | name
-
-  @typedoc "The agent state"
-  @type state :: term
-
-  @doc """
-  Returns a specification to start an agent under a supervisor.
-
-  See the "Child specification" section in the `Supervisor` module for more detailed information.
-  """
-  @doc since: "1.5.0"
-  def child_spec(arg) do
-    %{
-      id: Agent,
-      start: {Agent, :start_link, [arg]}
-    }
-  end
-
-  @doc false
-  defmacro __using__(opts) do
-    quote location: :keep, bind_quoted: [opts: opts] do
-      if Module.get_attribute(__MODULE__, :doc) == nil do
-        @doc """
-        Returns a specification to start this module under a supervisor.
-
-        See `Supervisor`.
-        """
-      end
-
-      def child_spec(arg) do
-        default = %{
-          id: __MODULE__,
-          start: {__MODULE__, :start_link, [arg]}
-        }
-
-        Supervisor.child_spec(default, unquote(Macro.escape(opts)))
-      end
-
-      defoverridable child_spec: 1
-    end
-  end
-
-  @doc """
-  Starts an agent linked to the current process with the given function.
-
-  This is often used to start the agent as part of a supervision tree.
-
-  Once the agent is spawned, the given function `fun` is invoked in the server
-  process, and should return the initial agent state. Note that `start_link/2`
-  does not return until the given function has returned.
-
-  ## Options
-
-  The `:name` option is used for registration as described in the module
-  documentation.
-
-  If the `:timeout` option is present, the agent is allowed to spend at most
-  the given number of milliseconds on initialization or it will be terminated
-  and the start function will return `{:error, :timeout}`.
-
-  If the `:debug` option is present, the corresponding function in the
-  [`:sys` module](http://www.erlang.org/doc/man/sys.html) will be invoked.
-
-  If the `:spawn_opt` option is present, its value will be passed as options
-  to the underlying process as in `Process.spawn/4`.
-
-  ## Return values
-
-  If the server is successfully created and initialized, the function returns
-  `{:ok, pid}`, where `pid` is the PID of the server. If an agent with the
-  specified name already exists, the function returns
-  `{:error, {:already_started, pid}}` with the PID of that process.
-
-  If the given function callback fails, the function returns `{:error, reason}`.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start_link(fn -> 42 end)
-      iex> Agent.get(pid, fn state -> state end)
-      42
-
-      iex> {:error, {exception, _stacktrace}} = Agent.start(fn -> raise "oops" end)
-      iex> exception
-      %RuntimeError{message: "oops"}
-
-  """
-  @spec start_link((() -> term), GenServer.options()) :: on_start
-  def start_link(fun, options \\ []) when is_function(fun, 0) do
-    GenServer.start_link(Agent.Server, fun, options)
-  end
-
-  @doc """
-  Starts an agent linked to the current process.
-
-  Same as `start_link/2` but a module, function, and arguments are expected
-  instead of an anonymous function; `fun` in `module` will be called with the
-  given arguments `args` to initialize the state.
-  """
-  @spec start_link(module, atom, [any], GenServer.options()) :: on_start
-  def start_link(module, fun, args, options \\ []) do
-    GenServer.start_link(Agent.Server, {module, fun, args}, options)
-  end
-
-  @doc """
-  Starts an agent process without links (outside of a supervision tree).
-
-  See `start_link/2` for more information.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start(fn -> 42 end)
-      iex> Agent.get(pid, fn state -> state end)
-      42
-
-  """
-  @spec start((() -> term), GenServer.options()) :: on_start
-  def start(fun, options \\ []) when is_function(fun, 0) do
-    GenServer.start(Agent.Server, fun, options)
-  end
-
-  @doc """
-  Starts an agent without links with the given module, function, and arguments.
-
-  See `start_link/4` for more information.
-  """
-  @spec start(module, atom, [any], GenServer.options()) :: on_start
-  def start(module, fun, args, options \\ []) do
-    GenServer.start(Agent.Server, {module, fun, args}, options)
-  end
-
-  @doc """
-  Gets an agent value via the given anonymous function.
-
-  The function `fun` is sent to the `agent` which invokes the function
-  passing the agent state. The result of the function invocation is
-  returned from this function.
-
-  `timeout` is an integer greater than zero which specifies how many
-  milliseconds are allowed before the agent executes the function and returns
-  the result value, or the atom `:infinity` to wait indefinitely. If no result
-  is received within the specified time, the function call fails and the caller
-  exits.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start_link(fn -> 42 end)
-      iex> Agent.get(pid, fn state -> state end)
-      42
-
-  """
-  @spec get(agent, (state -> a), timeout) :: a when a: var
-  def get(agent, fun, timeout \\ 5000) when is_function(fun, 1) do
-    GenServer.call(agent, {:get, fun}, timeout)
-  end
-
-  @doc """
-  Gets an agent value via the given function.
-
-  Same as `get/3` but a module, function, and arguments are expected
-  instead of an anonymous function. The state is added as first
-  argument to the given list of arguments.
-  """
-  @spec get(agent, module, atom, [term], timeout) :: any
-  def get(agent, module, fun, args, timeout \\ 5000) do
-    GenServer.call(agent, {:get, {module, fun, args}}, timeout)
-  end
-
-  @doc """
-  Gets and updates the agent state in one operation via the given anonymous
-  function.
-
-  The function `fun` is sent to the `agent` which invokes the function
-  passing the agent state. The function must return a tuple with two
-  elements, the first being the value to return (that is, the "get" value)
-  and the second one being the new state of the agent.
-
-  `timeout` is an integer greater than zero which specifies how many
-  milliseconds are allowed before the agent executes the function and returns
-  the result value, or the atom `:infinity` to wait indefinitely. If no result
-  is received within the specified time, the function call fails and the caller
-  exits.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start_link(fn -> 42 end)
-      iex> Agent.get_and_update(pid, fn state -> {state, state + 1} end)
-      42
-      iex> Agent.get(pid, fn state -> state end)
-      43
-
-  """
-  @spec get_and_update(agent, (state -> {a, state}), timeout) :: a when a: var
-  def get_and_update(agent, fun, timeout \\ 5000) when is_function(fun, 1) do
-    GenServer.call(agent, {:get_and_update, fun}, timeout)
-  end
-
-  @doc """
-  Gets and updates the agent state in one operation via the given function.
-
-  Same as `get_and_update/3` but a module, function, and arguments are expected
-  instead of an anonymous function. The state is added as first
-  argument to the given list of arguments.
-  """
-  @spec get_and_update(agent, module, atom, [term], timeout) :: any
-  def get_and_update(agent, module, fun, args, timeout \\ 5000) do
-    GenServer.call(agent, {:get_and_update, {module, fun, args}}, timeout)
-  end
-
-  @doc """
-  Updates the agent state via the given anonymous function.
-
-  The function `fun` is sent to the `agent` which invokes the function
-  passing the agent state. The return value of `fun` becomes the new
-  state of the agent.
-
-  This function always returns `:ok`.
-
-  `timeout` is an integer greater than zero which specifies how many
-  milliseconds are allowed before the agent executes the function and returns
-  the result value, or the atom `:infinity` to wait indefinitely. If no result
-  is received within the specified time, the function call fails and the caller
-  exits.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start_link(fn -> 42 end)
-      iex> Agent.update(pid, fn state -> state + 1 end)
-      :ok
-      iex> Agent.get(pid, fn state -> state end)
-      43
-
-  """
-  @spec update(agent, (state -> state), timeout) :: :ok
-  def update(agent, fun, timeout \\ 5000) when is_function(fun, 1) do
-    GenServer.call(agent, {:update, fun}, timeout)
-  end
-
-  @doc """
-  Updates the agent state via the given function.
-
-  Same as `update/3` but a module, function, and arguments are expected
-  instead of an anonymous function. The state is added as first
-  argument to the given list of arguments.
-  """
-  @spec update(agent, module, atom, [term], timeout) :: :ok
-  def update(agent, module, fun, args, timeout \\ 5000) do
-    GenServer.call(agent, {:update, {module, fun, args}}, timeout)
-  end
-
-  @doc """
-  Performs a cast (*fire and forget*) operation on the agent state.
-
-  The function `fun` is sent to the `agent` which invokes the function
-  passing the agent state. The return value of `fun` becomes the new
-  state of the agent.
-
-  Note that `cast` returns `:ok` immediately, regardless of whether `agent` (or
-  the node it should live on) exists.
-  """
-  @spec cast(agent, (state -> state)) :: :ok
-  def cast(agent, fun) when is_function(fun, 1) do
-    GenServer.cast(agent, {:cast, fun})
-  end
-
-  @doc """
-  Performs a cast (*fire and forget*) operation on the agent state.
-
-  Same as `cast/2` but a module, function, and arguments are expected
-  instead of an anonymous function. The state is added as first
-  argument to the given list of arguments.
-  """
-  @spec cast(agent, module, atom, [term]) :: :ok
-  def cast(agent, module, fun, args) do
-    GenServer.cast(agent, {:cast, {module, fun, args}})
-  end
-
-  @doc """
-  Synchronously stops the agent with the given `reason`.
-
-  It returns `:ok` if the agent terminates with the given
-  reason. If the agent terminates with another reason, the call will
-  exit.
-
-  This function keeps OTP semantics regarding error reporting.
-  If the reason is any other than `:normal`, `:shutdown` or
-  `{:shutdown, _}`, an error report will be logged.
-
-  ## Examples
-
-      iex> {:ok, pid} = Agent.start_link(fn -> 42 end)
-      iex> Agent.stop(pid)
-      :ok
-
-  """
-  @spec stop(agent, reason :: term, timeout) :: :ok
-  def stop(agent, reason \\ :normal, timeout \\ :infinity) do
-    GenServer.stop(agent, reason, timeout)
-  end
-end

lib/elixir/lib/agent/server.ex

@@ -1,51 +0,0 @@
-defmodule Agent.Server do
-  @moduledoc false
-
-  use GenServer
-
-  def init(fun) do
-    _ = initial_call(fun)
-    {:ok, run(fun, [])}
-  end
-
-  def handle_call({:get, fun}, _from, state) do
-    {:reply, run(fun, [state]), state}
-  end
-
-  def handle_call({:get_and_update, fun}, _from, state) do
-    case run(fun, [state]) do
-      {reply, state} -> {:reply, reply, state}
-      other -> {:stop, {:bad_return_value, other}, state}
-    end
-  end
-
-  def handle_call({:update, fun}, _from, state) do
-    {:reply, :ok, run(fun, [state])}
-  end
-
-  def handle_cast({:cast, fun}, state) do
-    {:noreply, run(fun, [state])}
-  end
-
-  def code_change(_old, state, fun) do
-    {:ok, run(fun, [state])}
-  end
-
-  defp initial_call(mfa) do
-    _ = Process.put(:"$initial_call", get_initial_call(mfa))
-    :ok
-  end
-
-  defp get_initial_call(fun) when is_function(fun, 0) do
-    {:module, module} = Function.info(fun, :module)
-    {:name, name} = Function.info(fun, :name)
-    {module, name, 0}
-  end
-
-  defp get_initial_call({mod, fun, args}) do
-    {mod, fun, length(args)}
-  end
-
-  defp run({m, f, a}, extra), do: apply(m, f, extra ++ a)
-  defp run(fun, extra), do: apply(fun, extra)
-end

lib/elixir/lib/application.ex

@@ -1,796 +0,0 @@
-defmodule Application do
-  @moduledoc """
-  A module for working with applications and defining application callbacks.
-
-  Applications are the idiomatic way to package software in Erlang/OTP. To get
-  the idea, they are similar to the "library" concept common in other
-  programming languages, but with some additional characteristics.
-
-  An application is a component implementing some specific functionality, with a
-  standardized directory structure, configuration, and lifecycle. Applications
-  are *loaded*, *started*, and *stopped*.
-
-  ## The application resource file
-
-  Applications are specified in their [*resource
-  file*](http://erlang.org/doc/man/app.html), which is a file called `APP.app`,
-  where `APP` is the application name. For example, the application resource
-  file of the OTP application `ex_unit` is called `ex_unit.app`.
-
-  You'll find the resource file of an application in its `ebin` directory, it is
-  generated automatically by Mix. Some of its keys are taken from the keyword
-  lists returned by the `project/0` and `application/0` functions defined in
-  `mix.exs`, and others are generated by Mix itself.
-
-  You can learn more about the generation of application resource files in the
-  documentation of `Mix.Tasks.Compile.App`, available as well by running
-  `mix help compile.app`.
-
-  ## The application environment
-
-  The key `env` of an application resource file has a list of tuples that map
-  atoms to terms, and its contents are known as the application *environment*.
-  Note that this environment is unrelated to the operating system environment.
-
-  By default, the environment of an application is an empty list. In a Mix
-  project you can set that key in `application/0`:
-
-      def application do
-        [env: [redis_host: "localhost"]]
-      end
-
-  and the generated application resource file is going to have it included.
-
-  The environment is available after loading the application, which is a process
-  explained later:
-
-      Application.load(:APP_NAME)
-      #=> :ok
-
-      Application.get_env(:APP_NAME, :redis_host)
-      #=> "localhost"
-
-  In Mix projects, the environment of the application and its dependencies can
-  be overridden via the `config/config.exs` file. If you start the application
-  with Mix, that configuration is available at compile time, and at runtime too,
-  but take into account it is not included in the generated application resource
-  file, and it is not available if you start the application without Mix.
-
-  For example, someone using your application can override its `:redis_host`
-  environment variable as follows:
-
-      config :APP_NAME, redis_host: "redis.local"
-
-  The function `put_env/3` allows dynamic configuration of the application
-  environment, but as a rule of thumb each application is responsible for its
-  own environment. Please do not use the functions in this module for directly
-  accessing or modifying the environment of other applications.
-
-  The application environment can be overridden via the `-config` option of
-  `erl`, as well as command-line options, as we are going to see below.
-
-  ## The application callback module
-
-  The `mod` key of an application resource file configures an application
-  callback module and start argument:
-
-      def application do
-        [mod: {MyApp, []}]
-      end
-
-  This key is optional, only needed for applications that start a supervision tree.
-
-  The `MyApp` module given to `:mod` needs to implement the `Application` behaviour.
-  This can be done by putting `use Application` in that module and implementing the
-  `c:start/2` callback, for example:
-
-      defmodule MyApp do
-        use Application
-
-        def start(_type, _args) do
-          children = []
-          Supervisor.start_link(children, strategy: :one_for_one)
-        end
-      end
-
-  The `c:start/2` callback has to spawn and link a supervisor and return `{:ok,
-  pid}` or `{:ok, pid, state}`, where `pid` is the PID of the supervisor, and
-  `state` is an optional application state. `args` is the second element of the
-  tuple given to the `:mod` option.
-
-  The `type` argument passed to `c:start/2` is usually `:normal` unless in a
-  distributed setup where application takeovers and failovers are configured.
-  Distributed applications are beyond the scope of this documentation.
-
-  When an application is shutting down, its `c:stop/1` callback is called after
-  the supervision tree has been stopped by the runtime. This callback allows the
-  application to do any final cleanup. The argument is the state returned by
-  `c:start/2`, if it did, or `[]` otherwise. The return value of `c:stop/1` is
-  ignored.
-
-  By using `Application`, modules get a default implementation of `c:stop/1`
-  that ignores its argument and returns `:ok`, but it can be overridden.
-
-  Application callback modules may also implement the optional callback
-  `c:prep_stop/1`. If present, `c:prep_stop/1` is invoked before the supervision
-  tree is terminated. Its argument is the state returned by `c:start/2`, if it did,
-  or `[]` otherwise, and its return value is passed to `c:stop/1`.
-
-  ## The application lifecycle
-
-  ### Loading applications
-
-  Applications are *loaded*, which means that the runtime finds and processes
-  their resource files:
-
-      Application.load(:ex_unit)
-      #=> :ok
-
-  If an application has included applications, they are also loaded. And the
-  procedure recurses if they in turn have included applications. Included
-  applications are unrelated to applications in Mix umbrella projects, they are
-  an Erlang/OTP concept that has to do with coordinated starts.
-
-  When an application is loaded, the environment specified in its resource file
-  is merged with any overrides from config files passed to `erl` via the
-  `-config` option. It is worth highlighting that releases pass `sys.config`
-  this way. The resulting environment can still be overridden again via specific
-  `-Application` options passed to `erl`.
-
-  Loading an application *does not* load its modules.
-
-  In practice, you rarely load applications by hand because that is part of the
-  start process, explained next.
-
-  ### Starting applications
-
-  Applications are also *started*:
-
-      Application.start(:ex_unit)
-      #=> :ok
-
-  Once your application is compiled, running your system is a matter of starting
-  your current application and its dependencies. Differently from other languages,
-  Elixir does not have a `main` procedure that is responsible for starting your
-  system. Instead, you start one or more applications, each with their own
-  initialization and termination logic.
-
-  When an application is started, the runtime loads it if it hasn't been loaded
-  yet (in the technical sense described above). Then, it checks if the
-  dependencies listed in the `applications` key of the resource file are already
-  started. Having at least one dependency not started is an error condition, but
-  when you start an application with `mix run`, Mix takes care of starting all
-  the dependencies for you, so in practice you don't need to worry about it
-  unless you are starting applications manually with the API provided by this
-  module.
-
-  If the application does not have a callback module configured, starting is
-  done at this point. Otherwise, its `c:start/2` callback if invoked. The PID of
-  the top-level supervisor returned by this function is stored by the runtime
-  for later use, and the returned application state is saved too, if any.
-
-  ### Stopping applications
-
-  Started applications are, finally, *stopped*:
-
-      Application.stop(:ex_unit)
-      #=> :ok
-
-  Stopping an application without a callback module is defined, but except for
-  some system tracing, it is in practice a no-op.
-
-  Stopping an application with a callback module has three steps:
-
-  1. If present, invoke the optional callback `c:prep_stop/1`.
-  2. Terminate the top-level supervisor.
-  3. Invoke the required callback `c:stop/1`.
-
-  The arguments passed to the callbacks are related to the state optionally
-  returned by `c:start/2`, and are documented in the section about the callback
-  module above.
-
-  It is important to highlight that step 2 is a blocking one. Termination of a
-  supervisor triggers a recursive chain of children terminations, therefore
-  orderly shutting down all descendant processes. The `c:stop/1` callback is
-  invoked only after termination of the whole supervision tree.
-
-  Shutting down a live system cleanly can be done by calling `System.stop/1`. It
-  will shut down every application in the opposite order they had been started.
-
-  By default, a SIGTERM from the operating system will automatically translate to
-  `System.stop/0`. You can also have more explicit control over OS signals via the
-  `:os.set_signal/2` function.
-
-  ## Tooling
-
-  The Mix build tool can also be used to start your applications. For example,
-  `mix test` automatically starts your application dependencies and your application
-  itself before your test runs. `mix run --no-halt` boots your current project and
-  can be used to start a long running system. See `mix help run`.
-
-  Developers can also use tools like [Distillery](https://github.com/bitwalker/distillery)
-  that build **releases**. Releases are able to package all of your source code
-  as well as the Erlang VM into a single directory. Releases also give you explicit
-  control over how each application is started and in which order. They also provide
-  a more streamlined mechanism for starting and stopping systems, debugging, logging,
-  as well as system monitoring.
-
-  Finally, Elixir provides tools such as escripts and archives, which are
-  different mechanisms for packaging your application. Those are typically used
-  when tools must be shared between developers and not as deployment options.
-  See `mix help archive.build` and `mix help escript.build` for more detail.
-
-  ## Further information
-
-  For further details on applications please check the documentation of the
-  [`application`](http://www.erlang.org/doc/man/application.html) Erlang module,
-  and the
-  [Applications](http://www.erlang.org/doc/design_principles/applications.html)
-  section of the [OTP Design Principles User's
-  Guide](http://erlang.org/doc/design_principles/users_guide.html).
-  """
-
-  @doc """
-  Called when an application is started.
-
-  This function is called when an application is started using
-  `Application.start/2` (and functions on top of that, such as
-  `Application.ensure_started/2`). This function should start the top-level
-  process of the application (which should be the top supervisor of the
-  application's supervision tree if the application follows the OTP design
-  principles around supervision).
-
-  `start_type` defines how the application is started:
-
-    * `:normal` - used if the startup is a normal startup or if the application
-      is distributed and is started on the current node because of a failover
-      from another node and the application specification key `:start_phases`
-      is `:undefined`.
-    * `{:takeover, node}` - used if the application is distributed and is
-      started on the current node because of a failover on the node `node`.
-    * `{:failover, node}` - used if the application is distributed and is
-      started on the current node because of a failover on node `node`, and the
-      application specification key `:start_phases` is not `:undefined`.
-
-  `start_args` are the arguments passed to the application in the `:mod`
-  specification key (e.g., `mod: {MyApp, [:my_args]}`).
-
-  This function should either return `{:ok, pid}` or `{:ok, pid, state}` if
-  startup is successful. `pid` should be the PID of the top supervisor. `state`
-  can be an arbitrary term, and if omitted will default to `[]`; if the
-  application is later stopped, `state` is passed to the `stop/1` callback (see
-  the documentation for the `c:stop/1` callback for more information).
-
-  `use Application` provides no default implementation for the `start/2`
-  callback.
-  """
-  @callback start(start_type, start_args :: term) ::
-              {:ok, pid}
-              | {:ok, pid, state}
-              | {:error, reason :: term}
-
-  @doc """
-  Called before stopping the application.
-
-  This function is called before the top-level supervisor is terminated. It
-  receives the state returned by `c:start/2`, if it did, or `[]` otherwise.
-  The return value is later passed to `c:stop/1`.
-  """
-  @callback prep_stop(state) :: state
-
-  @doc """
-  Called after an application has been stopped.
-
-  This function is called after an application has been stopped, i.e., after its
-  supervision tree has been stopped. It should do the opposite of what the
-  `c:start/2` callback did, and should perform any necessary cleanup. The return
-  value of this callback is ignored.
-
-  `state` is the state returned by `c:start/2`, if it did, or `[]` otherwise.
-  If the optional callback `c:prep_stop/1` is present, `state` is its return
-  value instead.
-
-  `use Application` defines a default implementation of this function which does
-  nothing and just returns `:ok`.
-  """
-  @callback stop(state) :: term
-
-  @doc """
-  Starts an application in synchronous phases.
-
-  This function is called after `start/2` finishes but before
-  `Application.start/2` returns. It will be called once for every start phase
-  defined in the application's (and any included applications') specification,
-  in the order they are listed in.
-  """
-  @callback start_phase(phase :: term, start_type, phase_args :: term) ::
-              :ok | {:error, reason :: term}
-
-  @doc """
-  Callback invoked after code upgrade, if the application environment
-  has changed.
-
-  `changed` is a keyword list of keys and their changed values in the
-  application environment. `new` is a keyword list with all new keys
-  and their values. `removed` is a list with all removed keys.
-  """
-  @callback config_change(changed, new, removed) :: :ok
-            when changed: keyword, new: keyword, removed: [atom]
-
-  @optional_callbacks start_phase: 3, prep_stop: 1, config_change: 3
-
-  @doc false
-  defmacro __using__(_) do
-    quote location: :keep do
-      @behaviour Application
-
-      @doc false
-      def stop(_state) do
-        :ok
-      end
-
-      defoverridable Application
-    end
-  end
-
-  @type app :: atom
-  @type key :: atom
-  @type value :: term
-  @type state :: term
-  @type start_type :: :normal | {:takeover, node} | {:failover, node}
-  @type restart_type :: :permanent | :transient | :temporary
-
-  @application_keys [
-    :description,
-    :id,
-    :vsn,
-    :modules,
-    :maxP,
-    :maxT,
-    :registered,
-    :included_applications,
-    :applications,
-    :mod,
-    :start_phases
-  ]
-
-  @doc """
-  Returns the spec for `app`.
-
-  The following keys are returned:
-
-    * #{Enum.map_join(@application_keys, "\n  * ", &"`#{inspect(&1)}`")}
-
-  Note the environment is not returned as it can be accessed via
-  `fetch_env/2`. Returns `nil` if the application is not loaded.
-  """
-  @spec spec(app) :: [{key, value}] | nil
-  def spec(app) when is_atom(app) do
-    case :application.get_all_key(app) do
-      {:ok, info} -> :lists.keydelete(:env, 1, info)
-      :undefined -> nil
-    end
-  end
-
-  @doc """
-  Returns the value for `key` in `app`'s specification.
-
-  See `spec/1` for the supported keys. If the given
-  specification parameter does not exist, this function
-  will raise. Returns `nil` if the application is not loaded.
-  """
-  @spec spec(app, key) :: value | nil
-  def spec(app, key) when is_atom(app) and key in @application_keys do
-    case :application.get_key(app, key) do
-      {:ok, value} -> value
-      :undefined -> nil
-    end
-  end
-
-  @doc """
-  Gets the application for the given module.
-
-  The application is located by analyzing the spec
-  of all loaded applications. Returns `nil` if
-  the module is not listed in any application spec.
-  """
-  @spec get_application(atom) :: atom | nil
-  def get_application(module) when is_atom(module) do
-    case :application.get_application(module) do
-      {:ok, app} -> app
-      :undefined -> nil
-    end
-  end
-
-  @doc """
-  Returns all key-value pairs for `app`.
-  """
-  @spec get_all_env(app) :: [{key, value}]
-  def get_all_env(app) when is_atom(app) do
-    :application.get_all_env(app)
-  end
-
-  @doc """
-  Returns the value for `key` in `app`'s environment.
-
-  If the configuration parameter does not exist, the function returns the
-  `default` value.
-
-  ## Examples
-
-  `get_env/3` is commonly used to read the configuration of your OTP applications.
-  Since Mix configurations are commonly used to configure applications, we will use
-  this as a point of illustration.
-
-  Consider a new application `:my_app`. `:my_app` contains a database engine which
-  supports a pool of databases. The database engine needs to know the configuration for
-  each of those databases, and that configuration is supplied by key-value pairs in
-  environment of `:my_app`.
-
-      config :my_app, Databases.RepoOne,
-        # A database configuration
-        ip: "localhost",
-        port: 5433
-
-      config :my_app, Databases.RepoTwo,
-        # Another database configuration (for the same OTP app)
-        ip: "localhost",
-        port: 20717
-
-      config :my_app, my_app_databases: [Databases.RepoOne, Databases.RepoTwo]
-
-  Our database engine used by `:my_app` needs to know what databases exist, and
-  what the database configurations are. The database engine can make a call to
-  `get_env(:my_app, :my_app_databases)` to retrieve the list of databases (specified
-  by module names). Our database engine can then traverse each repository in the
-  list and then call `get_env(:my_app, Databases.RepoOne)` and so forth to retrieve
-  the configuration of each one.
-
-  **Important:** if you are writing a library to be used by other developers,
-  it is generally recommended to avoid the application environment, as the
-  application environment is effectively a global storage. For more information,
-  read our [library guidelines](library-guidelines.html).
-  """
-  @spec get_env(app, key, value) :: value
-  def get_env(app, key, default \\ nil) when is_atom(app) do
-    :application.get_env(app, key, default)
-  end
-
-  @doc """
-  Returns the value for `key` in `app`'s environment in a tuple.
-
-  If the configuration parameter does not exist, the function returns `:error`.
-  """
-  @spec fetch_env(app, key) :: {:ok, value} | :error
-  def fetch_env(app, key) when is_atom(app) do
-    case :application.get_env(app, key) do
-      {:ok, value} -> {:ok, value}
-      :undefined -> :error
-    end
-  end
-
-  @doc """
-  Returns the value for `key` in `app`'s environment.
-
-  If the configuration parameter does not exist, raises `ArgumentError`.
-  """
-  @spec fetch_env!(app, key) :: value
-  def fetch_env!(app, key) when is_atom(app) do
-    case fetch_env(app, key) do
-      {:ok, value} ->
-        value
-
-      :error ->
-        vsn = :application.get_key(app, :vsn)
-        app = inspect(app)
-        key = inspect(key)
-
-        case vsn do
-          {:ok, _} ->
-            raise ArgumentError,
-                  "could not fetch application environment #{key} for application #{app} " <>
-                    "because configuration #{key} was not set"
-
-          :undefined ->
-            raise ArgumentError,
-                  "could not fetch application environment #{key} for application #{app} " <>
-                    "because the application was not loaded/started. If your application " <>
-                    "depends on #{app} at runtime, make sure to load/start it or list it " <>
-                    "under :extra_applications in your mix.exs file"
-        end
-    end
-  end
-
-  @doc """
-  Puts the `value` in `key` for the given `app`.
-
-  ## Options
-
-    * `:timeout` - the timeout for the change (defaults to `5_000` milliseconds)
-    * `:persistent` - persists the given value on application load and reloads
-
-  If `put_env/4` is called before the application is loaded, the application
-  environment values specified in the `.app` file will override the ones
-  previously set.
-
-  The `:persistent` option can be set to `true` when there is a need to guarantee
-  parameters set with this function will not be overridden by the ones defined
-  in the application resource file on load. This means persistent values will
-  stick after the application is loaded and also on application reload.
-  """
-  @spec put_env(app, key, value, timeout: timeout, persistent: boolean) :: :ok
-  def put_env(app, key, value, opts \\ []) when is_atom(app) do
-    :application.set_env(app, key, value, opts)
-  end
-
-  @doc """
-  Deletes the `key` from the given `app` environment.
-
-  See `put_env/4` for a description of the options.
-  """
-  @spec delete_env(app, key, timeout: timeout, persistent: boolean) :: :ok
-  def delete_env(app, key, opts \\ []) when is_atom(app) do
-    :application.unset_env(app, key, opts)
-  end
-
-  @doc """
-  Ensures the given `app` is started.
-
-  Same as `start/2` but returns `:ok` if the application was already
-  started. This is useful in scripts and in test setup, where test
-  applications need to be explicitly started:
-
-      :ok = Application.ensure_started(:my_test_dep)
-
-  """
-  @spec ensure_started(app, restart_type) :: :ok | {:error, term}
-  def ensure_started(app, type \\ :temporary) when is_atom(app) do
-    :application.ensure_started(app, type)
-  end
-
-  @doc """
-  Ensures the given `app` and its applications are started.
-
-  Same as `start/2` but also starts the applications listed under
-  `:applications` in the `.app` file in case they were not previously
-  started.
-  """
-  @spec ensure_all_started(app, restart_type) :: {:ok, [app]} | {:error, {app, term}}
-  def ensure_all_started(app, type \\ :temporary) when is_atom(app) do
-    :application.ensure_all_started(app, type)
-  end
-
-  @doc """
-  Starts the given `app`.
-
-  If the `app` is not loaded, the application will first be loaded using `load/1`.
-  Any included application, defined in the `:included_applications` key of the
-  `.app` file will also be loaded, but they won't be started.
-
-  Furthermore, all applications listed in the `:applications` key must be explicitly
-  started before this application is. If not, `{:error, {:not_started, app}}` is
-  returned, where `app` is the name of the missing application.
-
-  In case you want to automatically load **and start** all of `app`'s dependencies,
-  see `ensure_all_started/2`.
-
-  The `type` argument specifies the type of the application:
-
-    * `:permanent` - if `app` terminates, all other applications and the entire
-      node are also terminated.
-
-    * `:transient` - if `app` terminates with `:normal` reason, it is reported
-      but no other applications are terminated. If a transient application
-      terminates abnormally, all other applications and the entire node are
-      also terminated.
-
-    * `:temporary` - if `app` terminates, it is reported but no other
-      applications are terminated (the default).
-
-  Note that it is always possible to stop an application explicitly by calling
-  `stop/1`. Regardless of the type of the application, no other applications will
-  be affected.
-
-  Note also that the `:transient` type is of little practical use, since when a
-  supervision tree terminates, the reason is set to `:shutdown`, not `:normal`.
-  """
-  @spec start(app, restart_type) :: :ok | {:error, term}
-  def start(app, type \\ :temporary) when is_atom(app) do
-    :application.start(app, type)
-  end
-
-  @doc """
-  Stops the given `app`.
-
-  When stopped, the application is still loaded.
-  """
-  @spec stop(app) :: :ok | {:error, term}
-  def stop(app) when is_atom(app) do
-    :application.stop(app)
-  end
-
-  @doc """
-  Loads the given `app`.
-
-  In order to be loaded, an `.app` file must be in the load paths.
-  All `:included_applications` will also be loaded.
-
-  Loading the application does not start it nor load its modules, but
-  it does load its environment.
-  """
-  @spec load(app) :: :ok | {:error, term}
-  def load(app) when is_atom(app) do
-    :application.load(app)
-  end
-
-  @doc """
-  Unloads the given `app`.
-
-  It will also unload all `:included_applications`.
-  Note that the function does not purge the application modules.
-  """
-  @spec unload(app) :: :ok | {:error, term}
-  def unload(app) when is_atom(app) do
-    :application.unload(app)
-  end
-
-  @doc """
-  Gets the directory for app.
-
-  This information is returned based on the code path. Here is an
-  example:
-
-      File.mkdir_p!("foo/ebin")
-      Code.prepend_path("foo/ebin")
-      Application.app_dir(:foo)
-      #=> "foo"
-
-  Even though the directory is empty and there is no `.app` file
-  it is considered the application directory based on the name
-  "foo/ebin". The name may contain a dash `-` which is considered
-  to be the app version and it is removed for the lookup purposes:
-
-      File.mkdir_p!("bar-123/ebin")
-      Code.prepend_path("bar-123/ebin")
-      Application.app_dir(:bar)
-      #=> "bar-123"
-
-  For more information on code paths, check the `Code` module in
-  Elixir and also Erlang's [`:code` module](http://www.erlang.org/doc/man/code.html).
-  """
-  @spec app_dir(app) :: String.t()
-  def app_dir(app) when is_atom(app) do
-    case :code.lib_dir(app) do
-      lib when is_list(lib) -> IO.chardata_to_string(lib)
-      {:error, :bad_name} -> raise ArgumentError, "unknown application: #{inspect(app)}"
-    end
-  end
-
-  @doc """
-  Returns the given path inside `app_dir/1`.
-
-  If `path` is a string, then it will be used as the path inside `app_dir/1`. If
-  `path` is a list of strings, it will be joined (see `Path.join/1`) and the result
-  will be used as the path inside `app_dir/1`.
-
-  ## Examples
-
-      File.mkdir_p!("foo/ebin")
-      Code.prepend_path("foo/ebin")
-
-      Application.app_dir(:foo, "my_path")
-      #=> "foo/my_path"
-
-      Application.app_dir(:foo, ["my", "nested", "path"])
-      #=> "foo/my/nested/path"
-
-  """
-  @spec app_dir(app, String.t() | [String.t()]) :: String.t()
-  def app_dir(app, path)
-
-  def app_dir(app, path) when is_atom(app) and is_binary(path) do
-    Path.join(app_dir(app), path)
-  end
-
-  def app_dir(app, path) when is_atom(app) and is_list(path) do
-    Path.join([app_dir(app) | path])
-  end
-
-  @doc """
-  Returns a list with information about the applications which are currently running.
-  """
-  @spec started_applications(timeout) :: [{app, description :: charlist(), vsn :: charlist()}]
-  def started_applications(timeout \\ 5000) do
-    :application.which_applications(timeout)
-  end
-
-  @doc """
-  Returns a list with information about the applications which have been loaded.
-  """
-  @spec loaded_applications :: [{app, description :: charlist(), vsn :: charlist()}]
-  def loaded_applications do
-    :application.loaded_applications()
-  end
-
-  @doc """
-  Formats the error reason returned by `start/2`,
-  `ensure_started/2`, `stop/1`, `load/1` and `unload/1`,
-  returns a string.
-  """
-  @spec format_error(any) :: String.t()
-  def format_error(reason) do
-    try do
-      do_format_error(reason)
-    catch
-      # A user could create an error that looks like a built-in one
-      # causing an error.
-      :error, _ ->
-        inspect(reason)
-    end
-  end
-
-  # exit(:normal) call is special cased, undo the special case.
-  defp do_format_error({{:EXIT, :normal}, {mod, :start, args}}) do
-    Exception.format_exit({:normal, {mod, :start, args}})
-  end
-
-  # {:error, reason} return value
-  defp do_format_error({reason, {mod, :start, args}}) do
-    Exception.format_mfa(mod, :start, args) <>
-      " returned an error: " <> Exception.format_exit(reason)
-  end
-
-  # error or exit(reason) call, use exit reason as reason.
-  defp do_format_error({:bad_return, {{mod, :start, args}, {:EXIT, reason}}}) do
-    Exception.format_exit({reason, {mod, :start, args}})
-  end
-
-  # bad return value
-  defp do_format_error({:bad_return, {{mod, :start, args}, return}}) do
-    Exception.format_mfa(mod, :start, args) <> " returned a bad value: " <> inspect(return)
-  end
-
-  defp do_format_error({:already_started, app}) when is_atom(app) do
-    "already started application #{app}"
-  end
-
-  defp do_format_error({:not_started, app}) when is_atom(app) do
-    "not started application #{app}"
-  end
-
-  defp do_format_error({:bad_application, app}) do
-    "bad application: #{inspect(app)}"
-  end
-
-  defp do_format_error({:already_loaded, app}) when is_atom(app) do
-    "already loaded application #{app}"
-  end
-
-  defp do_format_error({:not_loaded, app}) when is_atom(app) do
-    "not loaded application #{app}"
-  end
-
-  defp do_format_error({:invalid_restart_type, restart}) do
-    "invalid application restart type: #{inspect(restart)}"
-  end
-
-  defp do_format_error({:invalid_name, name}) do
-    "invalid application name: #{inspect(name)}"
-  end
-
-  defp do_format_error({:invalid_options, opts}) do
-    "invalid application options: #{inspect(opts)}"
-  end
-
-  defp do_format_error({:badstartspec, spec}) do
-    "bad application start specs: #{inspect(spec)}"
-  end
-
-  defp do_format_error({'no such file or directory', file}) do
-    "could not find application file: #{file}"
-  end
-
-  defp do_format_error(reason) do
-    Exception.format_exit(reason)
-  end
-end

lib/elixir/lib/atom.ex

@@ -1,45 +0,0 @@
-defmodule Atom do
-  @moduledoc """
-  Convenience functions for working with atoms.
-
-  See also `Kernel.is_atom/1`.
-  """
-
-  @doc """
-  Converts an atom to a string.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Atom.to_string(:foo)
-      "foo"
-
-  """
-  @spec to_string(atom) :: String.t()
-  def to_string(atom) do
-    :erlang.atom_to_binary(atom, :utf8)
-  end
-
-  @doc """
-  Converts an atom to a charlist.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Atom.to_charlist(:"An atom")
-      'An atom'
-
-  """
-  @spec to_charlist(atom) :: charlist
-  def to_charlist(atom) do
-    :erlang.atom_to_list(atom)
-  end
-
-  # TODO: Remove by 2.0
-  @doc false
-  @deprecated "Use Atom.to_charlist/1 instead"
-  @spec to_char_list(atom) :: charlist
-  def to_char_list(atom), do: Atom.to_charlist(atom)
-end

lib/elixir/lib/behaviour.ex

@@ -1,121 +0,0 @@
-defmodule Behaviour do
-  @moduledoc """
-  Mechanism for handling behaviours.
-
-  This module is deprecated. Instead of `defcallback/1` and
-  `defmacrocallback/1`, the `@callback` and `@macrocallback`
-  module attributes can be used (respectively). See the
-  documentation for `Module` for more information on these
-  attributes.
-
-  Instead of `MyModule.__behaviour__(:callbacks)`,
-  `MyModule.behaviour_info(:callbacks)` can be used.
-  """
-
-  @moduledoc deprecated: "Use @callback and @macrocallback attributes instead"
-
-  @doc """
-  Defines a function callback according to the given type specification.
-  """
-  defmacro defcallback(spec) do
-    do_defcallback(:def, split_spec(spec, quote(do: term)))
-  end
-
-  @doc """
-  Defines a macro callback according to the given type specification.
-  """
-  defmacro defmacrocallback(spec) do
-    do_defcallback(:defmacro, split_spec(spec, quote(do: Macro.t())))
-  end
-
-  defp split_spec({:when, _, [{:::, _, [spec, return]}, guard]}, _default) do
-    {spec, return, guard}
-  end
-
-  defp split_spec({:when, _, [spec, guard]}, default) do
-    {spec, default, guard}
-  end
-
-  defp split_spec({:::, _, [spec, return]}, _default) do
-    {spec, return, []}
-  end
-
-  defp split_spec(spec, default) do
-    {spec, default, []}
-  end
-
-  defp do_defcallback(kind, {spec, return, guards}) do
-    case Macro.decompose_call(spec) do
-      {name, args} ->
-        do_callback(kind, name, args, return, guards)
-
-      _ ->
-        raise ArgumentError, "invalid syntax in #{kind}callback #{Macro.to_string(spec)}"
-    end
-  end
-
-  defp do_callback(kind, name, args, return, guards) do
-    fun = fn
-      {:::, _, [left, right]} ->
-        ensure_not_default(left)
-        ensure_not_default(right)
-        left
-
-      other ->
-        ensure_not_default(other)
-        other
-    end
-
-    :lists.foreach(fun, args)
-
-    spec =
-      quote do
-        unquote(name)(unquote_splicing(args)) :: unquote(return) when unquote(guards)
-      end
-
-    case kind do
-      :def -> quote(do: @callback(unquote(spec)))
-      :defmacro -> quote(do: @macrocallback(unquote(spec)))
-    end
-  end
-
-  defp ensure_not_default({:\\, _, [_, _]}) do
-    raise ArgumentError, "default arguments \\\\ not supported in defcallback/defmacrocallback"
-  end
-
-  defp ensure_not_default(_), do: :ok
-
-  @doc false
-  defmacro __using__(_) do
-    quote do
-      warning =
-        "the Behaviour module is deprecated. Instead of using this module, " <>
-          "use the @callback and @macrocallback module attributes. See the " <>
-          "documentation for Module for more information on these attributes"
-
-      IO.warn(warning)
-
-      @doc false
-      def __behaviour__(:callbacks) do
-        __MODULE__.behaviour_info(:callbacks)
-      end
-
-      def __behaviour__(:docs) do
-        {:docs_v1, _, :elixir, _, _, _, docs} = Code.fetch_docs(__MODULE__)
-
-        for {{kind, name, arity}, line, _, doc, _} <- docs, kind in [:callback, :macrocallback] do
-          case kind do
-            :callback -> {{name, arity}, line, :def, __behaviour__doc_value(doc)}
-            :macrocallback -> {{name, arity}, line, :defmacro, __behaviour__doc_value(doc)}
-          end
-        end
-      end
-
-      defp __behaviour__doc_value(:none), do: nil
-      defp __behaviour__doc_value(:hidden), do: false
-      defp __behaviour__doc_value(%{"en" => doc}), do: doc
-
-      import unquote(__MODULE__)
-    end
-  end
-end

lib/elixir/lib/bitwise.ex

@@ -1,231 +0,0 @@
-defmodule Bitwise do
-  @moduledoc """
-  A set of macros that perform calculations on bits.
-
-  The macros in this module come in two flavors: named or
-  operators. For example:
-
-      iex> use Bitwise
-      iex> bnot(1) # named
-      -2
-      iex> 1 &&& 1 # operator
-      1
-
-  If you prefer to use only operators or skip them, you can
-  pass the following options:
-
-    * `:only_operators` - includes only operators
-    * `:skip_operators` - skips operators
-
-  For example:
-
-      iex> use Bitwise, only_operators: true
-      iex> 1 &&& 1
-      1
-
-  When invoked with no options, `use Bitwise` is equivalent
-  to `import Bitwise`.
-
-  All bitwise macros can be used in guards:
-
-      iex> use Bitwise
-      iex> odd? = fn
-      ...>   int when band(int, 1) == 1 -> true
-      ...>   _ -> false
-      ...> end
-      iex> odd?.(1)
-      true
-
-  """
-
-  @doc false
-  defmacro __using__(options) do
-    except =
-      cond do
-        Keyword.get(options, :only_operators) ->
-          [bnot: 1, band: 2, bor: 2, bxor: 2, bsl: 2, bsr: 2]
-
-        Keyword.get(options, :skip_operators) ->
-          [~~~: 1, &&&: 2, |||: 2, ^^^: 2, <<<: 2, >>>: 2]
-
-        true ->
-          []
-      end
-
-    quote do
-      import Bitwise, except: unquote(except)
-    end
-  end
-
-  @doc """
-  Calculates the bitwise NOT of its argument.
-
-      iex> bnot(2)
-      -3
-      iex> bnot(2) &&& 3
-      1
-
-  """
-  @doc guard: true
-  defmacro bnot(expr) do
-    quote(do: :erlang.bnot(unquote(expr)))
-  end
-
-  @doc """
-  Prefix (unary) operator; calculates the bitwise NOT of its argument.
-
-      iex> ~~~2
-      -3
-      iex> ~~~2 &&& 3
-      1
-
-  """
-  @doc guard: true
-  defmacro ~~~expr do
-    quote(do: :erlang.bnot(unquote(expr)))
-  end
-
-  @doc """
-  Calculates the bitwise AND of its arguments.
-
-      iex> band(9, 3)
-      1
-
-  """
-  @doc guard: true
-  defmacro band(left, right) do
-    quote(do: :erlang.band(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Infix operator; calculates the bitwise AND of its arguments.
-
-      iex> 9 &&& 3
-      1
-
-  """
-  @doc guard: true
-  defmacro left &&& right do
-    quote(do: :erlang.band(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Calculates the bitwise OR of its arguments.
-
-      iex> bor(9, 3)
-      11
-
-  """
-  @doc guard: true
-  defmacro bor(left, right) do
-    quote(do: :erlang.bor(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Infix operator; calculates the bitwise OR of its arguments.
-
-      iex> 9 ||| 3
-      11
-
-  """
-  @doc guard: true
-  defmacro left ||| right do
-    quote(do: :erlang.bor(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Calculates the bitwise XOR of its arguments.
-
-      iex> bxor(9, 3)
-      10
-
-  """
-  @doc guard: true
-  defmacro bxor(left, right) do
-    quote(do: :erlang.bxor(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Infix operator; calculates the bitwise XOR of its arguments.
-
-      iex> 9 ^^^ 3
-      10
-
-  """
-  @doc guard: true
-  defmacro left ^^^ right do
-    quote(do: :erlang.bxor(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Calculates the result of an arithmetic left bitshift.
-
-      iex> bsl(1, 2)
-      4
-      iex> bsl(1, -2)
-      0
-      iex> bsl(-1, 2)
-      -4
-      iex> bsl(-1, -2)
-      -1
-
-  """
-  @doc guard: true
-  defmacro bsl(left, right) do
-    quote(do: :erlang.bsl(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Infix operator; calculates the result of an arithmetic left bitshift.
-
-      iex> 1 <<< 2
-      4
-      iex> 1 <<< -2
-      0
-      iex> -1 <<< 2
-      -4
-      iex> -1 <<< -2
-      -1
-
-  """
-  @doc guard: true
-  defmacro left <<< right do
-    quote(do: :erlang.bsl(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Calculates the result of an arithmetic right bitshift.
-
-      iex> bsr(1, 2)
-      0
-      iex> bsr(1, -2)
-      4
-      iex> bsr(-1, 2)
-      -1
-      iex> bsr(-1, -2)
-      -4
-
-  """
-  @doc guard: true
-  defmacro bsr(left, right) do
-    quote(do: :erlang.bsr(unquote(left), unquote(right)))
-  end
-
-  @doc """
-  Infix operator; calculates the result of an arithmetic right bitshift.
-
-      iex> 1 >>> 2
-      0
-      iex> 1 >>> -2
-      4
-      iex> -1 >>> 2
-      -1
-      iex> -1 >>> -2
-      -4
-
-  """
-  @doc guard: true
-  defmacro left >>> right do
-    quote(do: :erlang.bsr(unquote(left), unquote(right)))
-  end
-end

lib/elixir/lib/calendar.ex

@@ -1,320 +0,0 @@
-defmodule Calendar do
-  @moduledoc """
-  This module defines the responsibilities for working with
-  calendars, dates, times and datetimes in Elixir.
-
-  Currently it defines types and the minimal implementation
-  for a calendar behaviour in Elixir. The goal of the Calendar
-  features in Elixir is to provide a base for interoperability
-  instead of full-featured datetime API.
-
-  For the actual date, time and datetime structures, see `Date`,
-  `Time`, `NaiveDateTime` and `DateTime`.
-
-  Note the year, month, day, etc. designations are overspecified
-  (i.e. an integer instead of `1..12` for months) because different
-  calendars may have a different number of days per month, months per year and so on.
-  """
-
-  @type year :: integer
-  @type month :: pos_integer
-  @type day :: pos_integer
-  @type week :: pos_integer
-  @type day_of_week :: non_neg_integer
-  @type era :: non_neg_integer
-
-  @type hour :: non_neg_integer
-  @type minute :: non_neg_integer
-  @type second :: non_neg_integer
-
-  @typedoc """
-  The internal time format is used when converting between calendars.
-
-  It represents time as a fraction of a day (starting from midnight).
-  `parts_in_day` specifies how much of the day is already passed,
-  while `parts_per_day` signifies how many parts there fit in a day.
-  """
-  @type day_fraction :: {parts_in_day :: non_neg_integer, parts_per_day :: pos_integer}
-
-  @typedoc """
-  The internal date format that is used when converting between calendars.
-
-  This is the number of days including the fractional part that has passed of
-  the last day since 0000-01-01+00:00T00:00.000000 in ISO 8601 notation (also
-  known as midnight 1 January BC 1 of the proleptic Gregorian calendar).
-  """
-  @type iso_days :: {days :: integer, day_fraction}
-
-  @typedoc """
-  Microseconds with stored precision.
-
-  The precision represents the number of digits that must be used when
-  representing the microseconds to external format. If the precision is 0,
-  it means microseconds must be skipped.
-  """
-  @type microsecond :: {0..999_999, 0..6}
-
-  @typedoc "A calendar implementation"
-  @type calendar :: module
-
-  @typedoc "The time zone ID according to the IANA tz database (e.g. Europe/Zurich)"
-  @type time_zone :: String.t()
-
-  @typedoc "The time zone abbreviation (e.g. CET or CEST or BST etc.)"
-  @type zone_abbr :: String.t()
-
-  @typedoc "The time zone UTC offset in seconds"
-  @type utc_offset :: integer
-
-  @typedoc "The time zone standard offset in seconds (not zero in summer times)"
-  @type std_offset :: integer
-
-  @typedoc "Any map/struct that contains the date fields"
-  @type date :: %{optional(any) => any, calendar: calendar, year: year, month: month, day: day}
-
-  @typedoc "Any map/struct that contains the time fields"
-  @type time :: %{
-          optional(any) => any,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        }
-
-  @typedoc "Any map/struct that contains the naive_datetime fields"
-  @type naive_datetime :: %{
-          optional(any) => any,
-          calendar: calendar,
-          year: year,
-          month: month,
-          day: day,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        }
-
-  @typedoc "Any map/struct that contains the datetime fields"
-  @type datetime :: %{
-          optional(any) => any,
-          calendar: calendar,
-          year: year,
-          month: month,
-          day: day,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond,
-          time_zone: time_zone,
-          zone_abbr: zone_abbr,
-          utc_offset: utc_offset,
-          std_offset: std_offset
-        }
-
-  @typedoc """
-  Specifies the time zone database for calendar operations.
-
-  Many functions in the `DateTime` module require a time zone database.
-  By default, it uses the default time zone database returned by
-  `Calendar.get_time_zone_database/0`, which defaults to
-  `Calendar.UTCOnlyTimeZoneDatabase` which only handles "Etc/UTC"
-  datetimes and returns `{:error, :utc_only_time_zone_database}`
-  for any other time zone.
-
-  Other time zone databases (including ones provided by packages)
-  can be configure as default either via configuration:
-
-      config :elixir, :time_zone_database, CustomTimeZoneDatabase
-
-  or by calling `Calendar.put_time_zone_database/1`.
-
-  See `Calendar.TimeZoneDatabase` for more information on custom
-  time zone databases.
-  """
-  @type time_zone_database :: module()
-
-  @doc """
-  Returns how many days there are in the given year-month.
-  """
-  @callback days_in_month(year, month) :: day
-
-  @doc """
-  Returns how many months there are in the given year.
-  """
-  @callback months_in_year(year) :: month
-
-  @doc """
-  Returns `true` if the given year is a leap year.
-
-  A leap year is a year of a longer length than normal. The exact meaning
-  is up to the calendar. A calendar must return `false` if it does not support
-  the concept of leap years.
-  """
-  @callback leap_year?(year) :: boolean
-
-  @doc """
-  Calculates the day of the week from the given `year`, `month`, and `day`.
-  """
-  @callback day_of_week(year, month, day) :: day_of_week()
-
-  @doc """
-  Calculates the day of the year from the given `year`, `month`, and `day`.
-  """
-  @callback day_of_year(year, month, day) :: non_neg_integer()
-
-  @doc """
-  Calculates the quarter of the year from the given `year`, `month`, and `day`.
-  """
-  @callback quarter_of_year(year, month, day) :: non_neg_integer()
-
-  @doc """
-  Calculates the year and era from the given `year`.
-  """
-  @callback year_of_era(year) :: {year, era}
-
-  @doc """
-  Calculates the day and era from the given `year`, `month`, and `day`.
-  """
-  @callback day_of_era(year, month, day) :: {non_neg_integer(), era}
-
-  @doc """
-  Converts the date into a string according to the calendar.
-  """
-  @callback date_to_string(year, month, day) :: String.t()
-
-  @doc """
-  Converts the datetime (without time zone) into a string according to the calendar.
-  """
-  @callback naive_datetime_to_string(year, month, day, hour, minute, second, microsecond) ::
-              String.t()
-
-  @doc """
-  Converts the datetime (with time zone) into a string according to the calendar.
-  """
-  @callback datetime_to_string(
-              year,
-              month,
-              day,
-              hour,
-              minute,
-              second,
-              microsecond,
-              time_zone,
-              zone_abbr,
-              utc_offset,
-              std_offset
-            ) :: String.t()
-
-  @doc """
-  Converts the time into a string according to the calendar.
-  """
-  @callback time_to_string(hour, minute, second, microsecond) :: String.t()
-
-  @doc """
-  Converts the given datetime (without time zone) into the `t:iso_days/0` format.
-  """
-  @callback naive_datetime_to_iso_days(year, month, day, hour, minute, second, microsecond) ::
-              iso_days
-
-  @doc """
-  Converts `t:iso_days/0` to the Calendar's datetime format.
-  """
-  @callback naive_datetime_from_iso_days(iso_days) ::
-              {year, month, day, hour, minute, second, microsecond}
-
-  @doc """
-  Converts the given time to the `t:day_fraction/0` format.
-  """
-  @callback time_to_day_fraction(hour, minute, second, microsecond) :: day_fraction
-
-  @doc """
-  Converts `t:day_fraction/0` to the Calendar's time format.
-  """
-  @callback time_from_day_fraction(day_fraction) :: {hour, minute, second, microsecond}
-
-  @doc """
-  Define the rollover moment for the given calendar.
-
-  This is the moment, in your calendar, when the current day ends
-  and the next day starts.
-
-  The result of this function is used to check if two calendars rollover at
-  the same time of day. If they do not, we can only convert datetimes and times
-  between them. If they do, this means that we can also convert dates as well
-  as naive datetimes between them.
-
-  This day fraction should be in its most simplified form possible, to make comparisons fast.
-
-  ## Examples
-
-    * If, in your Calendar, a new day starts at midnight, return {0, 1}.
-    * If, in your Calendar, a new day starts at sunrise, return {1, 4}.
-    * If, in your Calendar, a new day starts at noon, return {1, 2}.
-    * If, in your Calendar, a new day starts at sunset, return {3, 4}.
-
-  """
-  @callback day_rollover_relative_to_midnight_utc() :: day_fraction
-
-  @doc """
-  Should return `true` if the given date describes a proper date in the calendar.
-  """
-  @callback valid_date?(year, month, day) :: boolean
-
-  @doc """
-  Should return `true` if the given time describes a proper time in the calendar.
-  """
-  @callback valid_time?(hour, minute, second, microsecond) :: boolean
-
-  # General Helpers
-
-  @doc """
-  Returns `true` if two calendars have the same moment of starting a new day,
-  `false` otherwise.
-
-  If two calendars are not compatible, we can only convert datetimes and times
-  between them. If they are compatible, this means that we can also convert
-  dates as well as naive datetimes between them.
-  """
-  @doc since: "1.5.0"
-  @spec compatible_calendars?(Calendar.calendar(), Calendar.calendar()) :: boolean
-  def compatible_calendars?(calendar, calendar), do: true
-
-  def compatible_calendars?(calendar1, calendar2) do
-    calendar1.day_rollover_relative_to_midnight_utc() ==
-      calendar2.day_rollover_relative_to_midnight_utc()
-  end
-
-  @doc """
-  Returns a microsecond tuple truncated to a given precision (`:microsecond`,
-  `:millisecond` or `:second`).
-  """
-  @doc since: "1.6.0"
-  @spec truncate(Calendar.microsecond(), :microsecond | :millisecond | :second) ::
-          Calendar.microsecond()
-  def truncate(microsecond_tuple, :microsecond), do: microsecond_tuple
-
-  def truncate({microsecond, precision}, :millisecond) do
-    output_precision = min(precision, 3)
-    {div(microsecond, 1000) * 1000, output_precision}
-  end
-
-  def truncate(_, :second), do: {0, 0}
-
-  @doc """
-  Sets the current time zone database.
-  """
-  @doc since: "1.8.0"
-  @spec put_time_zone_database(time_zone_database()) :: :ok
-  def put_time_zone_database(database) do
-    Application.put_env(:elixir, :time_zone_database, database)
-  end
-
-  @doc """
-  Gets the current time zone database.
-  """
-  @doc since: "1.8.0"
-  @spec get_time_zone_database() :: time_zone_database()
-  def get_time_zone_database() do
-    Application.get_env(:elixir, :time_zone_database, Calendar.UTCOnlyTimeZoneDatabase)
-  end
-end

lib/elixir/lib/calendar/date.ex

@@ -1,779 +0,0 @@
-defmodule Date do
-  @moduledoc """
-  A Date struct and functions.
-
-  The Date struct contains the fields year, month, day and calendar.
-  New dates can be built with the `new/3` function or using the
-  `~D` (see `Kernel.sigil_D/2`) sigil:
-
-      iex> ~D[2000-01-01]
-      ~D[2000-01-01]
-
-  Both `new/3` and sigil return a struct where the date fields can
-  be accessed directly:
-
-      iex> date = ~D[2000-01-01]
-      iex> date.year
-      2000
-      iex> date.month
-      1
-
-  The functions on this module work with the `Date` struct as well
-  as any struct that contains the same fields as the `Date` struct,
-  such as `NaiveDateTime` and `DateTime`. Such functions expect
-  `t:Calendar.date/0` in their typespecs (instead of `t:t/0`).
-
-  Developers should avoid creating the Date structs directly
-  and instead rely on the functions provided by this module as well
-  as the ones in third-party calendar libraries.
-
-  ## Comparing dates
-
-  Comparisons in Elixir using `==/2`, `>/2`, `</2` and similar are structural
-  and based on the `Date` struct fields. For proper comparison between
-  dates, use the `compare/2` function.
-
-  ## Using epochs
-
-  The `add/2` and `diff/2` functions can be used for computing dates
-  or retrieving the number of days between instants. For example, if there
-  is an interest in computing the number of days from the Unix epoch
-  (1970-01-01):
-
-      iex> Date.diff(~D[2010-04-17], ~D[1970-01-01])
-      14716
-
-      iex> Date.add(~D[1970-01-01], 14716)
-      ~D[2010-04-17]
-
-  Those functions are optimized to deal with common epochs, such
-  as the Unix Epoch above or the Gregorian Epoch (0000-01-01).
-  """
-
-  @enforce_keys [:year, :month, :day]
-  defstruct [:year, :month, :day, calendar: Calendar.ISO]
-
-  @type t :: %__MODULE__{
-          year: Calendar.year(),
-          month: Calendar.month(),
-          day: Calendar.day(),
-          calendar: Calendar.calendar()
-        }
-
-  @doc """
-  Returns a range of dates.
-
-  A range of dates represents a discrete number of dates where
-  the first and last values are dates with matching calendars.
-
-  Ranges of dates can be either increasing (`first <= last`) or
-  decreasing (`first > last`). They are also always inclusive.
-
-  ## Examples
-
-      iex> Date.range(~D[1999-01-01], ~D[2000-01-01])
-      #DateRange<~D[1999-01-01], ~D[2000-01-01]>
-
-  A range of dates implements the `Enumerable` protocol, which means
-  functions in the `Enum` module can be used to work with
-  ranges:
-
-      iex> range = Date.range(~D[2001-01-01], ~D[2002-01-01])
-      iex> Enum.count(range)
-      366
-      iex> Enum.member?(range, ~D[2001-02-01])
-      true
-      iex> Enum.reduce(range, 0, fn _date, acc -> acc - 1 end)
-      -366
-
-  """
-  @doc since: "1.5.0"
-  @spec range(Date.t(), Date.t()) :: Date.Range.t()
-  def range(%Date{calendar: calendar} = first, %Date{calendar: calendar} = last) do
-    {first_days, _} = to_iso_days(first)
-    {last_days, _} = to_iso_days(last)
-
-    %Date.Range{
-      first: first,
-      last: last,
-      first_in_iso_days: first_days,
-      last_in_iso_days: last_days
-    }
-  end
-
-  def range(%Date{}, %Date{}) do
-    raise ArgumentError, "both dates must have matching calendars"
-  end
-
-  @doc """
-  Returns the current date in UTC.
-
-  ## Examples
-
-      iex> date = Date.utc_today()
-      iex> date.year >= 2016
-      true
-
-  """
-  @doc since: "1.4.0"
-  @spec utc_today(Calendar.calendar()) :: t
-  def utc_today(calendar \\ Calendar.ISO)
-
-  def utc_today(Calendar.ISO) do
-    {:ok, {year, month, day}, _, _} = Calendar.ISO.from_unix(System.os_time(), :native)
-    %Date{year: year, month: month, day: day}
-  end
-
-  def utc_today(calendar) do
-    calendar
-    |> DateTime.utc_now()
-    |> DateTime.to_date()
-  end
-
-  @doc """
-  Returns `true` if the year in the given `date` is a leap year.
-
-  ## Examples
-
-      iex> Date.leap_year?(~D[2000-01-01])
-      true
-      iex> Date.leap_year?(~D[2001-01-01])
-      false
-      iex> Date.leap_year?(~D[2004-01-01])
-      true
-      iex> Date.leap_year?(~D[1900-01-01])
-      false
-      iex> Date.leap_year?(~N[2004-01-01 01:23:45])
-      true
-
-  """
-  @doc since: "1.4.0"
-  @spec leap_year?(Calendar.date()) :: boolean()
-  def leap_year?(date)
-
-  def leap_year?(%{calendar: calendar, year: year}) do
-    calendar.leap_year?(year)
-  end
-
-  @doc """
-  Returns the number of days in the given `date` month.
-
-  ## Examples
-
-      iex> Date.days_in_month(~D[1900-01-13])
-      31
-      iex> Date.days_in_month(~D[1900-02-09])
-      28
-      iex> Date.days_in_month(~N[2000-02-20 01:23:45])
-      29
-
-  """
-  @doc since: "1.4.0"
-  @spec days_in_month(Calendar.date()) :: Calendar.day()
-  def days_in_month(date)
-
-  def days_in_month(%{calendar: calendar, year: year, month: month}) do
-    calendar.days_in_month(year, month)
-  end
-
-  @doc """
-  Returns the number of months in the given `date` year.
-
-  ## Example
-
-      iex> Date.months_in_year(~D[1900-01-13])
-      12
-
-  """
-  @doc since: "1.7.0"
-  @spec months_in_year(Calendar.date()) :: Calendar.month()
-  def months_in_year(date)
-
-  def months_in_year(%{calendar: calendar, year: year}) do
-    calendar.months_in_year(year)
-  end
-
-  @doc """
-  Builds a new ISO date.
-
-  Expects all values to be integers. Returns `{:ok, date}` if each
-  entry fits its appropriate range, returns `{:error, reason}` otherwise.
-
-  ## Examples
-
-      iex> Date.new(2000, 1, 1)
-      {:ok, ~D[2000-01-01]}
-      iex> Date.new(2000, 13, 1)
-      {:error, :invalid_date}
-      iex> Date.new(2000, 2, 29)
-      {:ok, ~D[2000-02-29]}
-
-      iex> Date.new(2000, 2, 30)
-      {:error, :invalid_date}
-      iex> Date.new(2001, 2, 29)
-      {:error, :invalid_date}
-
-  """
-  @spec new(Calendar.year(), Calendar.month(), Calendar.day(), Calendar.calendar()) ::
-          {:ok, t} | {:error, atom}
-  def new(year, month, day, calendar \\ Calendar.ISO) do
-    if calendar.valid_date?(year, month, day) do
-      {:ok, %Date{year: year, month: month, day: day, calendar: calendar}}
-    else
-      {:error, :invalid_date}
-    end
-  end
-
-  @doc """
-  Converts the given date to a string according to its calendar.
-
-  ### Examples
-
-      iex> Date.to_string(~D[2000-02-28])
-      "2000-02-28"
-      iex> Date.to_string(~N[2000-02-28 01:23:45])
-      "2000-02-28"
-      iex> Date.to_string(~D[-0100-12-15])
-      "-0100-12-15"
-
-  """
-  @spec to_string(Calendar.date()) :: String.t()
-  def to_string(date)
-
-  def to_string(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.date_to_string(year, month, day)
-  end
-
-  @doc """
-  Parses the extended "Dates" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  The year parsed by this function is limited to four digits.
-
-  ## Examples
-
-      iex> Date.from_iso8601("2015-01-23")
-      {:ok, ~D[2015-01-23]}
-
-      iex> Date.from_iso8601("2015:01:23")
-      {:error, :invalid_format}
-
-      iex> Date.from_iso8601("2015-01-32")
-      {:error, :invalid_date}
-
-  """
-  @spec from_iso8601(String.t(), Calendar.calendar()) :: {:ok, t} | {:error, atom}
-  def from_iso8601(string, calendar \\ Calendar.ISO)
-
-  def from_iso8601(<<?-, rest::binary>>, calendar) do
-    with {:ok, %{year: year} = date} <- raw_from_iso8601(rest, calendar) do
-      {:ok, %{date | year: -year}}
-    end
-  end
-
-  def from_iso8601(<<rest::binary>>, calendar) do
-    raw_from_iso8601(rest, calendar)
-  end
-
-  [match_date, guard_date, read_date] = Calendar.ISO.__match_date__()
-
-  defp raw_from_iso8601(string, calendar) do
-    with unquote(match_date) <- string,
-         true <- unquote(guard_date) do
-      {year, month, day} = unquote(read_date)
-
-      with {:ok, date} <- new(year, month, day, Calendar.ISO) do
-        convert(date, calendar)
-      end
-    else
-      _ -> {:error, :invalid_format}
-    end
-  end
-
-  @doc """
-  Parses the extended "Dates" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  Raises if the format is invalid.
-
-  ## Examples
-
-      iex> Date.from_iso8601!("2015-01-23")
-      ~D[2015-01-23]
-      iex> Date.from_iso8601!("2015:01:23")
-      ** (ArgumentError) cannot parse "2015:01:23" as date, reason: :invalid_format
-
-  """
-  @spec from_iso8601!(String.t(), Calendar.calendar()) :: t
-  def from_iso8601!(string, calendar \\ Calendar.ISO) do
-    case from_iso8601(string, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError, "cannot parse #{inspect(string)} as date, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Converts the given `date` to
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  By default, `Date.to_iso8601/2` returns dates formatted in the "extended"
-  format, for human readability. It also supports the "basic" format through passing the `:basic` option.
-
-  Only supports converting dates which are in the ISO calendar,
-  or other calendars in which the days also start at midnight.
-  Attempting to convert dates from other calendars will raise an `ArgumentError`.
-
-  ### Examples
-
-      iex> Date.to_iso8601(~D[2000-02-28])
-      "2000-02-28"
-
-      iex> Date.to_iso8601(~D[2000-02-28], :basic)
-      "20000228"
-
-      iex> Date.to_iso8601(~N[2000-02-28 00:00:00])
-      "2000-02-28"
-
-  """
-  @spec to_iso8601(Calendar.date(), :extended | :basic) :: String.t()
-  def to_iso8601(date, format \\ :extended)
-
-  def to_iso8601(%{calendar: Calendar.ISO} = date, format) when format in [:basic, :extended] do
-    %{year: year, month: month, day: day} = date
-    Calendar.ISO.date_to_iso8601(year, month, day, format)
-  end
-
-  def to_iso8601(%{calendar: _} = date, format) when format in [:basic, :extended] do
-    date
-    |> convert!(Calendar.ISO)
-    |> to_iso8601()
-  end
-
-  @doc """
-  Converts the given `date` to an Erlang date tuple.
-
-  Only supports converting dates which are in the ISO calendar,
-  or other calendars in which the days also start at midnight.
-  Attempting to convert dates from other calendars will raise.
-
-  ## Examples
-
-      iex> Date.to_erl(~D[2000-01-01])
-      {2000, 1, 1}
-
-      iex> Date.to_erl(~N[2000-01-01 00:00:00])
-      {2000, 1, 1}
-
-  """
-  @spec to_erl(Calendar.date()) :: :calendar.date()
-  def to_erl(date) do
-    %{year: year, month: month, day: day} = convert!(date, Calendar.ISO)
-    {year, month, day}
-  end
-
-  @doc """
-  Converts an Erlang date tuple to a `Date` struct.
-
-  Only supports converting dates which are in the ISO calendar,
-  or other calendars in which the days also start at midnight.
-  Attempting to convert dates from other calendars will return an error tuple.
-
-  ## Examples
-
-      iex> Date.from_erl({2000, 1, 1})
-      {:ok, ~D[2000-01-01]}
-      iex> Date.from_erl({2000, 13, 1})
-      {:error, :invalid_date}
-
-  """
-  @spec from_erl(:calendar.date(), Calendar.calendar()) :: {:ok, t} | {:error, atom}
-  def from_erl(tuple, calendar \\ Calendar.ISO)
-
-  def from_erl({year, month, day}, calendar) do
-    with {:ok, date} <- new(year, month, day, Calendar.ISO), do: convert(date, calendar)
-  end
-
-  @doc """
-  Converts an Erlang date tuple but raises for invalid dates.
-
-  ## Examples
-
-      iex> Date.from_erl!({2000, 1, 1})
-      ~D[2000-01-01]
-      iex> Date.from_erl!({2000, 13, 1})
-      ** (ArgumentError) cannot convert {2000, 13, 1} to date, reason: :invalid_date
-
-  """
-  @spec from_erl!(:calendar.date(), Calendar.calendar()) :: t
-  def from_erl!(tuple, calendar \\ Calendar.ISO) do
-    case from_erl(tuple, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(tuple)} to date, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Compares two date structs.
-
-  Returns `:gt` if first date is later than the second
-  and `:lt` for vice versa. If the two dates are equal
-  `:eq` is returned.
-
-  ## Examples
-
-      iex> Date.compare(~D[2016-04-16], ~D[2016-04-28])
-      :lt
-
-  This function can also be used to compare across more
-  complex calendar types by considering only the date fields:
-
-      iex> Date.compare(~D[2016-04-16], ~N[2016-04-28 01:23:45])
-      :lt
-      iex> Date.compare(~D[2016-04-16], ~N[2016-04-16 01:23:45])
-      :eq
-      iex> Date.compare(~N[2016-04-16 12:34:56], ~N[2016-04-16 01:23:45])
-      :eq
-
-  """
-  @doc since: "1.4.0"
-  @spec compare(Calendar.date(), Calendar.date()) :: :lt | :eq | :gt
-  def compare(%{calendar: calendar} = date1, %{calendar: calendar} = date2) do
-    %{year: year1, month: month1, day: day1} = date1
-    %{year: year2, month: month2, day: day2} = date2
-
-    case {{year1, month1, day1}, {year2, month2, day2}} do
-      {first, second} when first > second -> :gt
-      {first, second} when first < second -> :lt
-      _ -> :eq
-    end
-  end
-
-  def compare(date1, date2) do
-    if Calendar.compatible_calendars?(date1.calendar, date2.calendar) do
-      case {to_iso_days(date1), to_iso_days(date2)} do
-        {first, second} when first > second -> :gt
-        {first, second} when first < second -> :lt
-        _ -> :eq
-      end
-    else
-      raise ArgumentError, """
-      cannot compare #{inspect(date1)} with #{inspect(date2)}.
-
-      This comparison would be ambiguous as their calendars have incompatible day rollover moments.
-      Specify an exact time of day (using DateTime) to resolve this ambiguity
-      """
-    end
-  end
-
-  @doc """
-  Converts the given `date` from its calendar to the given `calendar`.
-
-  Returns `{:ok, date}` if the calendars are compatible,
-  or `{:error, :incompatible_calendars}` if they are not.
-
-  See also `Calendar.compatible_calendars?/2`.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> Date.convert(~D[2000-01-01], Calendar.Holocene)
-      {:ok, %Date{calendar: Calendar.Holocene, year: 12000, month: 1, day: 1}}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert(Calendar.date(), Calendar.calendar()) ::
-          {:ok, t} | {:error, :incompatible_calendars}
-  def convert(%{calendar: calendar, year: year, month: month, day: day}, calendar) do
-    {:ok, %Date{calendar: calendar, year: year, month: month, day: day}}
-  end
-
-  def convert(%{calendar: calendar} = date, target_calendar) do
-    if Calendar.compatible_calendars?(calendar, target_calendar) do
-      result_date =
-        date
-        |> to_iso_days()
-        |> from_iso_days(target_calendar)
-
-      {:ok, result_date}
-    else
-      {:error, :incompatible_calendars}
-    end
-  end
-
-  @doc """
-  Similar to `Date.convert/2`, but raises an `ArgumentError`
-  if the conversion between the two calendars is not possible.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> Date.convert!(~D[2000-01-01], Calendar.Holocene)
-      %Date{calendar: Calendar.Holocene, year: 12000, month: 1, day: 1}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert!(Calendar.date(), Calendar.calendar()) :: t
-  def convert!(date, calendar) do
-    case convert(date, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(date)} to target calendar #{inspect(calendar)}, " <>
-                "reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Adds the number of days to the given `date`.
-
-  The days are counted as Gregorian days. The date is returned in the same
-  calendar as it was given in.
-
-  ## Examples
-
-      iex> Date.add(~D[2000-01-03], -2)
-      ~D[2000-01-01]
-      iex> Date.add(~D[2000-01-01], 2)
-      ~D[2000-01-03]
-      iex> Date.add(~N[2000-01-01 09:00:00], 2)
-      ~D[2000-01-03]
-      iex> Date.add(~D[-0010-01-01], -2)
-      ~D[-0011-12-30]
-
-  """
-  @doc since: "1.5.0"
-  @spec add(Calendar.date(), integer()) :: t
-  def add(%{calendar: Calendar.ISO} = date, days) do
-    %{year: year, month: month, day: day} = date
-
-    {year, month, day} =
-      Calendar.ISO.date_to_iso_days(year, month, day)
-      |> Kernel.+(days)
-      |> Calendar.ISO.date_from_iso_days()
-
-    %Date{calendar: Calendar.ISO, year: year, month: month, day: day}
-  end
-
-  def add(%{calendar: calendar} = date, days) do
-    {base_days, fraction} = to_iso_days(date)
-    from_iso_days({base_days + days, fraction}, calendar)
-  end
-
-  @doc """
-  Calculates the difference between two dates, in a full number of days.
-
-  It returns the number of Gregorian days between the dates. Only `Date`
-  structs that follow the same or compatible calendars can be compared
-  this way. If two calendars are not compatible, it will raise.
-
-  ## Examples
-
-      iex> Date.diff(~D[2000-01-03], ~D[2000-01-01])
-      2
-      iex> Date.diff(~D[2000-01-01], ~D[2000-01-03])
-      -2
-      iex> Date.diff(~D[0000-01-02], ~D[-0001-12-30])
-      3
-      iex> Date.diff(~D[2000-01-01], ~N[2000-01-03 09:00:00])
-      -2
-
-  """
-  @doc since: "1.5.0"
-  @spec diff(Calendar.date(), Calendar.date()) :: integer
-  def diff(%{calendar: Calendar.ISO} = date1, %{calendar: Calendar.ISO} = date2) do
-    %{year: year1, month: month1, day: day1} = date1
-    %{year: year2, month: month2, day: day2} = date2
-
-    Calendar.ISO.date_to_iso_days(year1, month1, day1) -
-      Calendar.ISO.date_to_iso_days(year2, month2, day2)
-  end
-
-  def diff(%{calendar: calendar1} = date1, %{calendar: calendar2} = date2) do
-    if Calendar.compatible_calendars?(calendar1, calendar2) do
-      {days1, _} = to_iso_days(date1)
-      {days2, _} = to_iso_days(date2)
-      days1 - days2
-    else
-      raise ArgumentError,
-            "cannot calculate the difference between #{inspect(date1)} and #{inspect(date2)} because their calendars are not compatible and thus the result would be ambiguous"
-    end
-  end
-
-  defp to_iso_days(%{calendar: Calendar.ISO, year: year, month: month, day: day}) do
-    {Calendar.ISO.date_to_iso_days(year, month, day), {0, 86_400_000_000}}
-  end
-
-  defp to_iso_days(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.naive_datetime_to_iso_days(year, month, day, 0, 0, 0, {0, 0})
-  end
-
-  defp from_iso_days({days, _}, Calendar.ISO) do
-    {year, month, day} = Calendar.ISO.date_from_iso_days(days)
-    %Date{year: year, month: month, day: day, calendar: Calendar.ISO}
-  end
-
-  defp from_iso_days(iso_days, target_calendar) do
-    {year, month, day, _, _, _, _} = target_calendar.naive_datetime_from_iso_days(iso_days)
-    %Date{year: year, month: month, day: day, calendar: target_calendar}
-  end
-
-  @doc """
-  Calculates the day of the week of a given `date`.
-
-  Returns the day of the week as an integer. For the ISO 8601
-  calendar (the default), it is an integer from 1 to 7, where
-  1 is Monday and 7 is Sunday.
-
-  ## Examples
-
-      iex> Date.day_of_week(~D[2016-10-31])
-      1
-      iex> Date.day_of_week(~D[2016-11-01])
-      2
-      iex> Date.day_of_week(~N[2016-11-01 01:23:45])
-      2
-      iex> Date.day_of_week(~D[-0015-10-30])
-      3
-
-  """
-  @doc since: "1.4.0"
-  @spec day_of_week(Calendar.date()) :: Calendar.day()
-  def day_of_week(date)
-
-  def day_of_week(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.day_of_week(year, month, day)
-  end
-
-  @doc """
-  Calculates the day of the year of a given `date`.
-
-  Returns the day of the year as an integer. For the ISO 8601
-  calendar (the default), it is an integer from 1 to 366.
-
-  ## Examples
-
-      iex> Date.day_of_year(~D[2016-01-01])
-      1
-      iex> Date.day_of_year(~D[2016-11-01])
-      306
-      iex> Date.day_of_year(~D[-0015-10-30])
-      303
-      iex> Date.day_of_year(~D[2004-12-31])
-      366
-
-  """
-  @doc since: "1.8.0"
-  @spec day_of_year(Calendar.date()) :: Calendar.day()
-  def day_of_year(date)
-
-  def day_of_year(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.day_of_year(year, month, day)
-  end
-
-  @doc """
-  Calculates the quarter of the year of a given `date`.
-
-  Returns the day of the year as an integer. For the ISO 8601
-  calendar (the default), it is an integer from 1 to 4.
-
-  ## Examples
-
-      iex> Date.quarter_of_year(~D[2016-10-31])
-      4
-      iex> Date.quarter_of_year(~D[2016-01-01])
-      1
-      iex> Date.quarter_of_year(~N[2016-04-01 01:23:45])
-      2
-      iex> Date.quarter_of_year(~D[-0015-09-30])
-      3
-
-  """
-  @doc since: "1.8.0"
-  @spec quarter_of_year(Calendar.date()) :: non_neg_integer()
-  def quarter_of_year(date)
-
-  def quarter_of_year(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.quarter_of_year(year, month, day)
-  end
-
-  @doc """
-  Calculates the year-of-era and era for a given
-  calendar year.
-
-  Returns a tuple `{year, era}` representing the
-  year within the era and the era number.
-
-  ## Examples
-
-      iex> Date.year_of_era(~D[0001-01-01])
-      {1, 1}
-      iex> Date.year_of_era(~D[0000-12-31])
-      {1, 0}
-      iex> Date.year_of_era(~D[-0001-01-01])
-      {2, 0}
-
-  """
-  @doc since: "1.8.0"
-  @spec year_of_era(Calendar.date()) :: {Calendar.year(), non_neg_integer()}
-  def year_of_era(date)
-
-  def year_of_era(%{calendar: calendar, year: year}) do
-    calendar.year_of_era(year)
-  end
-
-  @doc """
-  Calculates the day-of-era and era for a given
-  calendar `date`.
-
-  Returns a tuple `{day, era}` representing the
-  day within the era and the era number.
-
-  ## Examples
-
-    iex> Date.day_of_era(~D[0001-01-01])
-    {1, 1}
-    iex> Date.day_of_era(~D[0000-12-31])
-    {1, 0}
-
-  """
-  @doc since: "1.8.0"
-  @spec day_of_era(Calendar.date()) :: {Calendar.day(), non_neg_integer()}
-  def day_of_era(date)
-
-  def day_of_era(%{calendar: calendar, year: year, month: month, day: day}) do
-    calendar.day_of_era(year, month, day)
-  end
-
-  ## Helpers
-
-  defimpl String.Chars do
-    def to_string(%{calendar: calendar, year: year, month: month, day: day}) do
-      calendar.date_to_string(year, month, day)
-    end
-  end
-
-  defimpl Inspect do
-    def inspect(%{calendar: Calendar.ISO, year: year, month: month, day: day}, _) do
-      "~D[" <> Calendar.ISO.date_to_string(year, month, day) <> "]"
-    end
-
-    def inspect(date, opts) do
-      Inspect.Any.inspect(date, opts)
-    end
-  end
-end

lib/elixir/lib/calendar/date_range.ex

@@ -1,132 +0,0 @@
-defmodule Date.Range do
-  @moduledoc """
-  Returns an inclusive range between dates.
-
-  Ranges must be created with the `Date.range/2` function.
-
-  The following fields are public:
-
-    * `:first` - the initial date on the range
-    * `:last` - the last date on the range
-
-  The remaining fields are private and should not be accessed.
-  """
-
-  @type t :: %__MODULE__{
-          first: Date.t(),
-          last: Date.t(),
-          first_in_iso_days: iso_days(),
-          last_in_iso_days: iso_days()
-        }
-
-  @typep iso_days() :: Calendar.iso_days()
-
-  defstruct [:first, :last, :first_in_iso_days, :last_in_iso_days]
-
-  defimpl Enumerable do
-    def member?(%{first: %{calendar: calendar}} = range, %Date{calendar: calendar} = date) do
-      %{
-        first: first,
-        last: last,
-        first_in_iso_days: first_in_iso_days,
-        last_in_iso_days: last_in_iso_days
-      } = range
-
-      %{year: first_year, month: first_month, day: first_day} = first
-      %{year: last_year, month: last_month, day: last_day} = last
-      %{year: year, month: month, day: day} = date
-      first = {first_year, first_month, first_day}
-      last = {last_year, last_month, last_day}
-      date = {year, month, day}
-
-      if first_in_iso_days <= last_in_iso_days do
-        {:ok, date >= first and date <= last}
-      else
-        {:ok, date >= last and date <= first}
-      end
-    end
-
-    def member?(_, _) do
-      {:ok, false}
-    end
-
-    def count(%{first_in_iso_days: first, last_in_iso_days: last}) do
-      {:ok, abs(first - last) + 1}
-    end
-
-    def slice(range) do
-      %{
-        first_in_iso_days: first,
-        last_in_iso_days: last,
-        first: %{calendar: calendar}
-      } = range
-
-      if first <= last do
-        {:ok, last - first + 1, &slice_asc(first + &1, &2, calendar)}
-      else
-        {:ok, first - last + 1, &slice_desc(first - &1, &2, calendar)}
-      end
-    end
-
-    defp slice_asc(current, 1, calendar), do: [date_from_iso_days(current, calendar)]
-
-    defp slice_asc(current, remaining, calendar) do
-      [date_from_iso_days(current, calendar) | slice_asc(current + 1, remaining - 1, calendar)]
-    end
-
-    defp slice_desc(current, 1, calendar), do: [date_from_iso_days(current, calendar)]
-
-    defp slice_desc(current, remaining, calendar) do
-      [date_from_iso_days(current, calendar) | slice_desc(current - 1, remaining - 1, calendar)]
-    end
-
-    def reduce(range, acc, fun) do
-      %{
-        first_in_iso_days: first_in_iso_days,
-        last_in_iso_days: last_in_iso_days,
-        first: %{calendar: calendar}
-      } = range
-
-      up? = first_in_iso_days <= last_in_iso_days
-      reduce(first_in_iso_days, last_in_iso_days, acc, fun, calendar, up?)
-    end
-
-    defp reduce(_x, _y, {:halt, acc}, _fun, _calendar, _up?) do
-      {:halted, acc}
-    end
-
-    defp reduce(x, y, {:suspend, acc}, fun, calendar, up?) do
-      {:suspended, acc, &reduce(x, y, &1, fun, calendar, up?)}
-    end
-
-    defp reduce(x, y, {:cont, acc}, fun, calendar, up? = true) when x <= y do
-      reduce(x + 1, y, fun.(date_from_iso_days(x, calendar), acc), fun, calendar, up?)
-    end
-
-    defp reduce(x, y, {:cont, acc}, fun, calendar, up? = false) when x >= y do
-      reduce(x - 1, y, fun.(date_from_iso_days(x, calendar), acc), fun, calendar, up?)
-    end
-
-    defp reduce(_, _, {:cont, acc}, _fun, _calendar, _up) do
-      {:done, acc}
-    end
-
-    defp date_from_iso_days(days, Calendar.ISO) do
-      {year, month, day} = Calendar.ISO.date_from_iso_days(days)
-      %Date{year: year, month: month, day: day, calendar: Calendar.ISO}
-    end
-
-    defp date_from_iso_days(days, calendar) do
-      {year, month, day, _, _, _, _} =
-        calendar.naive_datetime_from_iso_days({days, {0, 86_400_000_000}})
-
-      %Date{year: year, month: month, day: day, calendar: calendar}
-    end
-  end
-
-  defimpl Inspect do
-    def inspect(%Date.Range{first: first, last: last}, _) do
-      "#DateRange<" <> inspect(first) <> ", " <> inspect(last) <> ">"
-    end
-  end
-end

lib/elixir/lib/calendar/iso.ex

@@ -1,996 +0,0 @@
-defmodule Calendar.ISO do
-  @moduledoc """
-  A calendar implementation that follows to ISO 8601.
-
-  This calendar implements the proleptic Gregorian calendar and
-  is therefore compatible with the calendar used in most countries
-  today. The proleptic means the Gregorian rules for leap years are
-  applied for all time, consequently the dates give different results
-  before the year 1583 from when the Gregorian calendar was adopted.
-
-  Note that while ISO 8601 allows times and datetimes to specify
-  24:00:00 as the zero hour of the next day, this notation is not
-  supported by Elixir.
-  """
-
-  @behaviour Calendar
-
-  @unix_epoch 62_167_219_200
-  unix_start = (315_537_897_600 + @unix_epoch) * -1_000_000
-  unix_end = 315_569_519_999_999_999 - @unix_epoch * 1_000_000
-  @unix_range_microseconds unix_start..unix_end
-
-  @type year :: -9999..9999
-  @type month :: 1..12
-  @type day :: 1..31
-
-  @seconds_per_minute 60
-  @seconds_per_hour 60 * 60
-  # Note that this does *not* handle leap seconds.
-  @seconds_per_day 24 * 60 * 60
-  @last_second_of_the_day @seconds_per_day - 1
-  @microseconds_per_second 1_000_000
-  @parts_per_day @seconds_per_day * @microseconds_per_second
-
-  @days_per_nonleap_year 365
-  @days_per_leap_year 366
-
-  @months_in_year 12
-
-  # The ISO epoch starts, in this implementation,
-  # with ~D[0000-01-01]. Era "1" starts
-  # on ~D[0001-01-01] which is 366 days later.
-  @iso_epoch 366
-
-  @doc false
-  def __match_date__ do
-    quote do
-      [
-        <<y1, y2, y3, y4, ?-, m1, m2, ?-, d1, d2>>,
-        y1 >= ?0 and y1 <= ?9 and y2 >= ?0 and y2 <= ?9 and y3 >= ?0 and y3 <= ?9 and y4 >= ?0 and
-          y4 <= ?9 and m1 >= ?0 and m1 <= ?9 and m2 >= ?0 and m2 <= ?9 and d1 >= ?0 and d1 <= ?9 and
-          d2 >= ?0 and d2 <= ?9,
-        {
-          (y1 - ?0) * 1000 + (y2 - ?0) * 100 + (y3 - ?0) * 10 + (y4 - ?0),
-          (m1 - ?0) * 10 + (m2 - ?0),
-          (d1 - ?0) * 10 + (d2 - ?0)
-        }
-      ]
-    end
-  end
-
-  @doc false
-  def __match_time__ do
-    quote do
-      [
-        <<h1, h2, ?:, i1, i2, ?:, s1, s2>>,
-        h1 >= ?0 and h1 <= ?9 and h2 >= ?0 and h2 <= ?9 and i1 >= ?0 and i1 <= ?9 and i2 >= ?0 and
-          i2 <= ?9 and s1 >= ?0 and s1 <= ?9 and s2 >= ?0 and s2 <= ?9,
-        {
-          (h1 - ?0) * 10 + (h2 - ?0),
-          (i1 - ?0) * 10 + (i2 - ?0),
-          (s1 - ?0) * 10 + (s2 - ?0)
-        }
-      ]
-    end
-  end
-
-  @doc """
-  Returns the `t:Calendar.iso_days/0` format of the specified date.
-
-  ## Examples
-
-      iex> Calendar.ISO.naive_datetime_to_iso_days(0, 1, 1, 0, 0, 0, {0, 6})
-      {0, {0, 86400000000}}
-      iex> Calendar.ISO.naive_datetime_to_iso_days(2000, 1, 1, 12, 0, 0, {0, 6})
-      {730485, {43200000000, 86400000000}}
-      iex> Calendar.ISO.naive_datetime_to_iso_days(2000, 1, 1, 13, 0, 0, {0, 6})
-      {730485, {46800000000, 86400000000}}
-      iex> Calendar.ISO.naive_datetime_to_iso_days(-1, 1, 1, 0, 0, 0, {0, 6})
-      {-365, {0, 86400000000}}
-
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec naive_datetime_to_iso_days(
-          Calendar.year(),
-          Calendar.month(),
-          Calendar.day(),
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond()
-        ) :: Calendar.iso_days()
-  def naive_datetime_to_iso_days(year, month, day, hour, minute, second, microsecond) do
-    {date_to_iso_days(year, month, day), time_to_day_fraction(hour, minute, second, microsecond)}
-  end
-
-  @doc """
-  Converts the `t:Calendar.iso_days/0` format to the datetime format specified by this calendar.
-
-  ## Examples
-
-      iex> Calendar.ISO.naive_datetime_from_iso_days({0, {0, 86400}})
-      {0, 1, 1, 0, 0, 0, {0, 6}}
-      iex> Calendar.ISO.naive_datetime_from_iso_days({730_485, {0, 86400}})
-      {2000, 1, 1, 0, 0, 0, {0, 6}}
-      iex> Calendar.ISO.naive_datetime_from_iso_days({730_485, {43200, 86400}})
-      {2000, 1, 1, 12, 0, 0, {0, 6}}
-      iex> Calendar.ISO.naive_datetime_from_iso_days({-365, {0, 86400000000}})
-      {-1, 1, 1, 0, 0, 0, {0, 6}}
-
-  """
-  @doc since: "1.5.0"
-  @spec naive_datetime_from_iso_days(Calendar.iso_days()) :: {
-          Calendar.year(),
-          Calendar.month(),
-          Calendar.day(),
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond()
-        }
-  @impl true
-  def naive_datetime_from_iso_days({days, day_fraction}) do
-    {year, month, day} = date_from_iso_days(days)
-    {hour, minute, second, microsecond} = time_from_day_fraction(day_fraction)
-    {year, month, day, hour, minute, second, microsecond}
-  end
-
-  @doc """
-  Returns the normalized day fraction of the specified time.
-
-  ## Examples
-
-      iex> Calendar.ISO.time_to_day_fraction(0, 0, 0, {0, 6})
-      {0, 86400000000}
-      iex> Calendar.ISO.time_to_day_fraction(12, 34, 56, {123, 6})
-      {45296000123, 86400000000}
-
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec time_to_day_fraction(
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond()
-        ) :: Calendar.day_fraction()
-  def time_to_day_fraction(0, 0, 0, {0, _}) do
-    {0, @parts_per_day}
-  end
-
-  def time_to_day_fraction(hour, minute, second, {microsecond, _}) do
-    combined_seconds = hour * @seconds_per_hour + minute * @seconds_per_minute + second
-    {combined_seconds * @microseconds_per_second + microsecond, @parts_per_day}
-  end
-
-  @doc """
-  Converts a day fraction to this Calendar's representation of time.
-
-  ## Examples
-
-      iex> Calendar.ISO.time_from_day_fraction({1, 2})
-      {12, 0, 0, {0, 6}}
-      iex> Calendar.ISO.time_from_day_fraction({13, 24})
-      {13, 0, 0, {0, 6}}
-
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec time_from_day_fraction(Calendar.day_fraction()) ::
-          {Calendar.hour(), Calendar.minute(), Calendar.second(), Calendar.microsecond()}
-  def time_from_day_fraction({0, _}) do
-    {0, 0, 0, {0, 6}}
-  end
-
-  def time_from_day_fraction({parts_in_day, parts_per_day}) do
-    total_microseconds = divide_by_parts_per_day(parts_in_day, parts_per_day)
-
-    {hours, rest_microseconds1} =
-      div_mod(total_microseconds, @seconds_per_hour * @microseconds_per_second)
-
-    {minutes, rest_microseconds2} =
-      div_mod(rest_microseconds1, @seconds_per_minute * @microseconds_per_second)
-
-    {seconds, microseconds} = div_mod(rest_microseconds2, @microseconds_per_second)
-    {hours, minutes, seconds, {microseconds, 6}}
-  end
-
-  defp divide_by_parts_per_day(parts_in_day, @parts_per_day), do: parts_in_day
-
-  defp divide_by_parts_per_day(parts_in_day, parts_per_day),
-    do: div(parts_in_day * @parts_per_day, parts_per_day)
-
-  # Converts year, month, day to count of days since 0000-01-01.
-  @doc false
-  def date_to_iso_days(0, 1, 1) do
-    0
-  end
-
-  def date_to_iso_days(1970, 1, 1) do
-    719_528
-  end
-
-  def date_to_iso_days(year, month, day) when year in -9999..9999 do
-    true = day <= days_in_month(year, month)
-
-    days_in_previous_years(year) + days_before_month(month) + leap_day_offset(year, month) + day -
-      1
-  end
-
-  # Converts count of days since 0000-01-01 to {year, month, day} tuple.
-  @doc false
-  def date_from_iso_days(days) when days in -3_652_059..3_652_424 do
-    {year, day_of_year} = days_to_year(days)
-    extra_day = if leap_year?(year), do: 1, else: 0
-    {month, day_in_month} = year_day_to_year_date(extra_day, day_of_year)
-    {year, month, day_in_month + 1}
-  end
-
-  defp div_mod(int1, int2) do
-    div = div(int1, int2)
-    rem = int1 - div * int2
-
-    if rem >= 0 do
-      {div, rem}
-    else
-      {div - 1, rem + int2}
-    end
-  end
-
-  @doc """
-  Returns how many days there are in the given year-month.
-
-  ## Examples
-
-      iex> Calendar.ISO.days_in_month(1900, 1)
-      31
-      iex> Calendar.ISO.days_in_month(1900, 2)
-      28
-      iex> Calendar.ISO.days_in_month(2000, 2)
-      29
-      iex> Calendar.ISO.days_in_month(2001, 2)
-      28
-      iex> Calendar.ISO.days_in_month(2004, 2)
-      29
-      iex> Calendar.ISO.days_in_month(2004, 4)
-      30
-      iex> Calendar.ISO.days_in_month(-1, 5)
-      31
-
-  """
-  @spec days_in_month(year, month) :: 28..31
-  @impl true
-  def days_in_month(year, month)
-
-  def days_in_month(year, 2) do
-    if leap_year?(year), do: 29, else: 28
-  end
-
-  def days_in_month(_, month) when month in [4, 6, 9, 11], do: 30
-  def days_in_month(_, month) when month in 1..12, do: 31
-
-  @doc """
-  Returns how many months there are in the given year.
-
-  ## Example
-
-      iex> Calendar.ISO.months_in_year(2004)
-      12
-
-  """
-  @doc since: "1.7.0"
-  @impl true
-  @spec months_in_year(year) :: 12
-  def months_in_year(_year) do
-    @months_in_year
-  end
-
-  @doc """
-  Returns if the given year is a leap year.
-
-  ## Examples
-
-      iex> Calendar.ISO.leap_year?(2000)
-      true
-      iex> Calendar.ISO.leap_year?(2001)
-      false
-      iex> Calendar.ISO.leap_year?(2004)
-      true
-      iex> Calendar.ISO.leap_year?(1900)
-      false
-      iex> Calendar.ISO.leap_year?(-4)
-      true
-
-  """
-  @spec leap_year?(year) :: boolean()
-  @impl true
-  def leap_year?(year) when is_integer(year) do
-    rem(year, 4) === 0 and (rem(year, 100) !== 0 or rem(year, 400) === 0)
-  end
-
-  @doc """
-  Calculates the day of the week from the given `year`, `month`, and `day`.
-
-  It is an integer from 1 to 7, where 1 is Monday and 7 is Sunday.
-
-  ## Examples
-
-      iex> Calendar.ISO.day_of_week(2016, 10, 31)
-      1
-      iex> Calendar.ISO.day_of_week(2016, 11, 1)
-      2
-      iex> Calendar.ISO.day_of_week(2016, 11, 2)
-      3
-      iex> Calendar.ISO.day_of_week(2016, 11, 3)
-      4
-      iex> Calendar.ISO.day_of_week(2016, 11, 4)
-      5
-      iex> Calendar.ISO.day_of_week(2016, 11, 5)
-      6
-      iex> Calendar.ISO.day_of_week(2016, 11, 6)
-      7
-      iex> Calendar.ISO.day_of_week(-99, 1, 31)
-      4
-
-  """
-  @spec day_of_week(year, month, day) :: 1..7
-  @impl true
-  def day_of_week(year, month, day)
-      when is_integer(year) and is_integer(month) and is_integer(day) do
-    iso_days_to_day_of_week(date_to_iso_days(year, month, day))
-  end
-
-  defp iso_days_to_day_of_week(iso_days) do
-    Integer.mod(iso_days + 5, 7) + 1
-  end
-
-  @doc """
-  Calculates the day of the year from the given `year`, `month`, and `day`.
-
-  It is an integer from 1 to 366.
-
-  ## Examples
-
-      iex> Calendar.ISO.day_of_year(2016, 1, 31)
-      31
-      iex> Calendar.ISO.day_of_year(-99, 2, 1)
-      32
-      iex> Calendar.ISO.day_of_year(2018, 2, 28)
-      59
-
-  """
-  @doc since: "1.8.0"
-  @spec day_of_year(year, month, day) :: 1..366
-  @impl true
-  def day_of_year(year, month, day)
-      when is_integer(year) and is_integer(month) and is_integer(day) do
-    true = day <= days_in_month(year, month)
-    days_before_month(month) + leap_day_offset(year, month) + day
-  end
-
-  @doc """
-  Calculates the quarter of the year from the given `year`, `month`, and `day`.
-
-  It is an integer from 1 to 4.
-
-  ## Examples
-
-      iex> Calendar.ISO.quarter_of_year(2016, 1, 31)
-      1
-      iex> Calendar.ISO.quarter_of_year(2016, 4, 3)
-      2
-      iex> Calendar.ISO.quarter_of_year(-99, 9, 31)
-      3
-      iex> Calendar.ISO.quarter_of_year(2018, 12, 28)
-      4
-
-  """
-  @doc since: "1.8.0"
-  @spec quarter_of_year(year, month, day) :: 1..4
-  @impl true
-  def quarter_of_year(year, month, day)
-      when is_integer(year) and is_integer(month) and is_integer(day) do
-    div(month - 1, 3) + 1
-  end
-
-  @doc """
-  Calculates the year and era from the given `year`.
-
-  The ISO calendar has two eras: the current era which
-  starts in year 1 and is defined as era "1". And a
-  second era for those years less than 1 defined as
-  era "0".
-
-  ## Examples
-
-      iex> Calendar.ISO.year_of_era(1)
-      {1, 1}
-      iex> Calendar.ISO.year_of_era(2018)
-      {2018, 1}
-      iex> Calendar.ISO.year_of_era(0)
-      {1, 0}
-      iex> Calendar.ISO.year_of_era(-1)
-      {2, 0}
-
-  """
-  @doc since: "1.8.0"
-  @spec year_of_era(year) :: {year, era :: 0..1}
-  @impl true
-  def year_of_era(year) when is_integer(year) and year > 0 do
-    {year, 1}
-  end
-
-  def year_of_era(year) when is_integer(year) and year < 1 do
-    {abs(year) + 1, 0}
-  end
-
-  @doc """
-  Calculates the day and era from the given `year`, `month`, and `day`.
-
-  ## Examples
-
-      iex> Calendar.ISO.day_of_era(0, 1, 1)
-      {366, 0}
-      iex> Calendar.ISO.day_of_era(1, 1, 1)
-      {1, 1}
-      iex> Calendar.ISO.day_of_era(0, 12, 31)
-      {1, 0}
-      iex> Calendar.ISO.day_of_era(0, 12, 30)
-      {2, 0}
-      iex> Calendar.ISO.day_of_era(-1, 12, 31)
-      {367, 0}
-
-  """
-  @doc since: "1.8.0"
-  @spec day_of_era(year, month, day) :: {day :: pos_integer(), era :: 0..1}
-  @impl true
-  def day_of_era(year, month, day)
-      when is_integer(year) and is_integer(month) and is_integer(day) and year > 0 do
-    day = date_to_iso_days(year, month, day) - @iso_epoch + 1
-    {day, 1}
-  end
-
-  def day_of_era(year, month, day)
-      when is_integer(year) and is_integer(month) and is_integer(day) and year < 1 do
-    day = abs(date_to_iso_days(year, month, day) - @iso_epoch)
-    {day, 0}
-  end
-
-  @doc """
-  Converts the given time into a string.
-
-  ## Examples
-
-      iex> Calendar.ISO.time_to_string(2, 2, 2, {2, 6})
-      "02:02:02.000002"
-      iex> Calendar.ISO.time_to_string(2, 2, 2, {2, 2})
-      "02:02:02.00"
-      iex> Calendar.ISO.time_to_string(2, 2, 2, {2, 0})
-      "02:02:02"
-
-  """
-  @spec time_to_string(
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond()
-        ) :: String.t()
-  @impl true
-  def time_to_string(hour, minute, second, microsecond) do
-    time_to_string(hour, minute, second, microsecond, :extended)
-  end
-
-  def time_to_string(hour, minute, second, {_, 0}, format) do
-    time_to_string_format(hour, minute, second, format)
-  end
-
-  def time_to_string(hour, minute, second, {microsecond, precision}, format) do
-    time_to_string_format(hour, minute, second, format) <>
-      "." <> (microsecond |> zero_pad(6) |> binary_part(0, precision))
-  end
-
-  defp time_to_string_format(hour, minute, second, :extended) do
-    zero_pad(hour, 2) <> ":" <> zero_pad(minute, 2) <> ":" <> zero_pad(second, 2)
-  end
-
-  defp time_to_string_format(hour, minute, second, :basic) do
-    zero_pad(hour, 2) <> zero_pad(minute, 2) <> zero_pad(second, 2)
-  end
-
-  @doc """
-  Converts the given date into a string.
-
-  ## Examples
-
-      iex> Calendar.ISO.date_to_string(2015, 2, 28)
-      "2015-02-28"
-      iex> Calendar.ISO.date_to_string(2017, 8, 1)
-      "2017-08-01"
-      iex> Calendar.ISO.date_to_string(-99, 1, 31)
-      "-0099-01-31"
-
-  """
-  @spec date_to_string(year, month, day) :: String.t()
-  @impl true
-  def date_to_string(year, month, day) do
-    date_to_string(year, month, day, :extended)
-  end
-
-  defp date_to_string(year, month, day, :extended) do
-    zero_pad(year, 4) <> "-" <> zero_pad(month, 2) <> "-" <> zero_pad(day, 2)
-  end
-
-  defp date_to_string(year, month, day, :basic) do
-    zero_pad(year, 4) <> zero_pad(month, 2) <> zero_pad(day, 2)
-  end
-
-  @doc """
-  Converts the datetime (without time zone) into a string.
-
-  ## Examples
-
-      iex> Calendar.ISO.naive_datetime_to_string(2015, 2, 28, 1, 2, 3, {4, 6})
-      "2015-02-28 01:02:03.000004"
-      iex> Calendar.ISO.naive_datetime_to_string(2017, 8, 1, 1, 2, 3, {4, 5})
-      "2017-08-01 01:02:03.00000"
-
-  """
-  @impl true
-  @spec naive_datetime_to_string(
-          year,
-          month,
-          day,
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond()
-        ) :: String.t()
-  def naive_datetime_to_string(year, month, day, hour, minute, second, microsecond) do
-    date_to_string(year, month, day) <> " " <> time_to_string(hour, minute, second, microsecond)
-  end
-
-  @doc """
-  Converts the datetime (with time zone) into a string.
-
-  ## Examples
-
-      iex> time_zone = "Europe/Berlin"
-      iex> Calendar.ISO.datetime_to_string(2017, 8, 1, 1, 2, 3, {4, 5}, time_zone, "CET", 3600, 0)
-      "2017-08-01 01:02:03.00000+01:00 CET Europe/Berlin"
-      iex> Calendar.ISO.datetime_to_string(2017, 8, 1, 1, 2, 3, {4, 5}, time_zone, "CDT", 3600, 3600)
-      "2017-08-01 01:02:03.00000+02:00 CDT Europe/Berlin"
-
-      iex> time_zone = "America/Los_Angeles"
-      iex> Calendar.ISO.datetime_to_string(2015, 2, 28, 1, 2, 3, {4, 5}, time_zone, "PST", -28800, 0)
-      "2015-02-28 01:02:03.00000-08:00 PST America/Los_Angeles"
-      iex> Calendar.ISO.datetime_to_string(2015, 2, 28, 1, 2, 3, {4, 5}, time_zone, "PDT", -28800, 3600)
-      "2015-02-28 01:02:03.00000-07:00 PDT America/Los_Angeles"
-
-  """
-  @impl true
-  @spec datetime_to_string(
-          year,
-          month,
-          day,
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond(),
-          Calendar.time_zone(),
-          Calendar.zone_abbr(),
-          Calendar.utc_offset(),
-          Calendar.std_offset()
-        ) :: String.t()
-  def datetime_to_string(
-        year,
-        month,
-        day,
-        hour,
-        minute,
-        second,
-        microsecond,
-        time_zone,
-        zone_abbr,
-        utc_offset,
-        std_offset
-      ) do
-    date_to_string(year, month, day) <>
-      " " <>
-      time_to_string(hour, minute, second, microsecond) <>
-      offset_to_string(utc_offset, std_offset, time_zone) <>
-      zone_to_string(utc_offset, std_offset, zone_abbr, time_zone)
-  end
-
-  @doc """
-  Determines if the date given is valid according to the proleptic Gregorian calendar.
-
-  ## Examples
-
-      iex> Calendar.ISO.valid_date?(2015, 2, 28)
-      true
-      iex> Calendar.ISO.valid_date?(2015, 2, 30)
-      false
-      iex> Calendar.ISO.valid_date?(-1, 12, 31)
-      true
-      iex> Calendar.ISO.valid_date?(-1, 12, 32)
-      false
-
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec valid_date?(year, month, day) :: boolean
-  def valid_date?(year, month, day) do
-    month in 1..12 and year in -9999..9999 and
-      (is_integer(day) and day >= 1 and day <= days_in_month(year, month))
-  end
-
-  @doc """
-  Determines if the date given is valid according to the proleptic Gregorian calendar.
-
-  Note that while ISO 8601 allows times to specify 24:00:00 as the
-  zero hour of the next day, this notation is not supported by Elixir.
-  Leap seconds are not supported as well by the built-in Calendar.ISO.
-
-  ## Examples
-
-      iex> Calendar.ISO.valid_time?(10, 50, 25, {3006, 6})
-      true
-      iex> Calendar.ISO.valid_time?(23, 59, 60, {0, 0})
-      false
-      iex> Calendar.ISO.valid_time?(24, 0, 0, {0, 0})
-      false
-
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec valid_time?(Calendar.hour(), Calendar.minute(), Calendar.second(), Calendar.microsecond()) ::
-          boolean
-  def valid_time?(hour, minute, second, {microsecond, precision}) do
-    hour in 0..23 and minute in 0..59 and second in 0..59 and microsecond in 0..999_999 and
-      precision in 0..6
-  end
-
-  @doc """
-  See `c:Calendar.day_rollover_relative_to_midnight_utc/0` for documentation.
-  """
-  @doc since: "1.5.0"
-  @impl true
-  @spec day_rollover_relative_to_midnight_utc() :: {0, 1}
-  def day_rollover_relative_to_midnight_utc() do
-    {0, 1}
-  end
-
-  defp offset_to_string(utc, std, zone, format \\ :extended)
-  defp offset_to_string(0, 0, "Etc/UTC", _format), do: "Z"
-
-  defp offset_to_string(utc, std, _zone, format) do
-    total = utc + std
-    second = abs(total)
-    minute = second |> rem(3600) |> div(60)
-    hour = div(second, 3600)
-    format_offset(total, hour, minute, format)
-  end
-
-  defp format_offset(total, hour, minute, :extended) do
-    sign(total) <> zero_pad(hour, 2) <> ":" <> zero_pad(minute, 2)
-  end
-
-  defp format_offset(total, hour, minute, :basic) do
-    sign(total) <> zero_pad(hour, 2) <> zero_pad(minute, 2)
-  end
-
-  defp zone_to_string(0, 0, _abbr, "Etc/UTC"), do: ""
-  defp zone_to_string(_, _, abbr, zone), do: " " <> abbr <> " " <> zone
-
-  defp sign(total) when total < 0, do: "-"
-  defp sign(_), do: "+"
-
-  defp zero_pad(val, count) when val >= 0 do
-    num = Integer.to_string(val)
-    :binary.copy("0", max(count - byte_size(num), 0)) <> num
-  end
-
-  defp zero_pad(val, count) do
-    "-" <> zero_pad(-val, count)
-  end
-
-  ## Helpers
-
-  @doc false
-  def from_unix(integer, unit) when is_integer(integer) do
-    total = System.convert_time_unit(integer, unit, :microsecond)
-
-    if total in @unix_range_microseconds do
-      microseconds = Integer.mod(total, @microseconds_per_second)
-      seconds = @unix_epoch + Integer.floor_div(total, @microseconds_per_second)
-      precision = precision_for_unit(unit)
-      {date, time} = iso_seconds_to_datetime(seconds)
-      {:ok, date, time, {microseconds, precision}}
-    else
-      {:error, :invalid_unix_time}
-    end
-  end
-
-  defp precision_for_unit(unit) do
-    subsecond = div(System.convert_time_unit(1, :second, unit), 10)
-    precision_for_unit(subsecond, 0)
-  end
-
-  defp precision_for_unit(0, precision), do: precision
-  defp precision_for_unit(_, 6), do: 6
-
-  defp precision_for_unit(number, precision),
-    do: precision_for_unit(div(number, 10), precision + 1)
-
-  @doc false
-  def date_to_iso8601(year, month, day, format \\ :extended) do
-    date_to_string(year, month, day, format)
-  end
-
-  @doc false
-  def time_to_iso8601(hour, minute, second, microsecond, format \\ :extended) do
-    time_to_string(hour, minute, second, microsecond, format)
-  end
-
-  @doc false
-  def naive_datetime_to_iso8601(
-        year,
-        month,
-        day,
-        hour,
-        minute,
-        second,
-        microsecond,
-        format \\ :extended
-      ) do
-    date_to_string(year, month, day, format) <>
-      "T" <> time_to_string(hour, minute, second, microsecond, format)
-  end
-
-  @doc false
-  def datetime_to_iso8601(
-        year,
-        month,
-        day,
-        hour,
-        minute,
-        second,
-        microsecond,
-        time_zone,
-        _zone_abbr,
-        utc_offset,
-        std_offset,
-        format \\ :extended
-      ) do
-    date_to_string(year, month, day, format) <>
-      "T" <>
-      time_to_string(hour, minute, second, microsecond, format) <>
-      offset_to_string(utc_offset, std_offset, time_zone, format)
-  end
-
-  @doc false
-  def parse_microsecond("." <> rest) do
-    case parse_microsecond(rest, 0, "") do
-      {"", 0, _} ->
-        :error
-
-      {microsecond, precision, rest} when precision in 1..6 ->
-        pad = String.duplicate("0", 6 - byte_size(microsecond))
-        {{String.to_integer(microsecond <> pad), precision}, rest}
-
-      {microsecond, _precision, rest} ->
-        {{String.to_integer(binary_part(microsecond, 0, 6)), 6}, rest}
-    end
-  end
-
-  def parse_microsecond("," <> rest) do
-    parse_microsecond("." <> rest)
-  end
-
-  def parse_microsecond(rest) do
-    {{0, 0}, rest}
-  end
-
-  defp parse_microsecond(<<head, tail::binary>>, precision, acc) when head in ?0..?9,
-    do: parse_microsecond(tail, precision + 1, <<acc::binary, head>>)
-
-  defp parse_microsecond(rest, precision, acc), do: {acc, precision, rest}
-
-  @doc false
-  def parse_offset(""), do: {nil, ""}
-  def parse_offset("Z"), do: {0, ""}
-  def parse_offset("-00:00"), do: :error
-
-  def parse_offset(<<?+, hour::2-bytes, ?:, min::2-bytes, rest::binary>>),
-    do: parse_offset(1, hour, min, rest)
-
-  def parse_offset(<<?-, hour::2-bytes, ?:, min::2-bytes, rest::binary>>),
-    do: parse_offset(-1, hour, min, rest)
-
-  def parse_offset(<<?+, hour::2-bytes, min::2-bytes, rest::binary>>),
-    do: parse_offset(1, hour, min, rest)
-
-  def parse_offset(<<?-, hour::2-bytes, min::2-bytes, rest::binary>>),
-    do: parse_offset(-1, hour, min, rest)
-
-  def parse_offset(<<?+, hour::2-bytes, rest::binary>>), do: parse_offset(1, hour, "00", rest)
-  def parse_offset(<<?-, hour::2-bytes, rest::binary>>), do: parse_offset(-1, hour, "00", rest)
-  def parse_offset(_), do: :error
-
-  defp parse_offset(sign, hour, min, rest) do
-    with {hour, ""} when hour < 24 <- Integer.parse(hour),
-         {min, ""} when min < 60 <- Integer.parse(min) do
-      {(hour * 60 + min) * 60 * sign, rest}
-    else
-      _ -> :error
-    end
-  end
-
-  @doc false
-  def iso_days_to_unit({days, {parts, ppd}}, unit) do
-    day_microseconds = days * @parts_per_day
-    microseconds = divide_by_parts_per_day(parts, ppd)
-    System.convert_time_unit(day_microseconds + microseconds, :microsecond, unit)
-  end
-
-  @doc false
-  def add_day_fraction_to_iso_days({days, {parts, ppd}}, add, ppd) do
-    normalize_iso_days(days, parts + add, ppd)
-  end
-
-  def add_day_fraction_to_iso_days({days, {parts, ppd}}, add, add_ppd) do
-    parts = parts * add_ppd
-    add = add * ppd
-    gcd = Integer.gcd(ppd, add_ppd)
-    result_parts = div(parts + add, gcd)
-    result_ppd = div(ppd * add_ppd, gcd)
-    normalize_iso_days(days, result_parts, result_ppd)
-  end
-
-  defp normalize_iso_days(days, parts, ppd) do
-    days_offset = div(parts, ppd)
-    parts = rem(parts, ppd)
-
-    if parts < 0 do
-      {days + days_offset - 1, {parts + ppd, ppd}}
-    else
-      {days + days_offset, {parts, ppd}}
-    end
-  end
-
-  # Note that this function does not add the extra leap day for a leap year.
-  # If you want to add that leap day when appropriate,
-  # add the result of leap_day_offset/2 to the result of days_before_month/1.
-  defp days_before_month(1), do: 0
-  defp days_before_month(2), do: 31
-  defp days_before_month(3), do: 59
-  defp days_before_month(4), do: 90
-  defp days_before_month(5), do: 120
-  defp days_before_month(6), do: 151
-  defp days_before_month(7), do: 181
-  defp days_before_month(8), do: 212
-  defp days_before_month(9), do: 243
-  defp days_before_month(10), do: 273
-  defp days_before_month(11), do: 304
-  defp days_before_month(12), do: 334
-
-  defp leap_day_offset(_year, month) when month < 3, do: 0
-
-  defp leap_day_offset(year, _month) do
-    if leap_year?(year), do: 1, else: 0
-  end
-
-  defp days_to_year(days) when days < 0 do
-    year_estimate = -div(-days, @days_per_nonleap_year) - 1
-
-    {year, days_before_year} =
-      days_to_year(year_estimate, days, days_to_end_of_epoch(year_estimate))
-
-    leap_year_pad = if leap_year?(year), do: 1, else: 0
-    {year, leap_year_pad + @days_per_nonleap_year + days - days_before_year}
-  end
-
-  defp days_to_year(days) do
-    year_estimate = div(days, @days_per_nonleap_year)
-
-    {year, days_before_year} =
-      days_to_year(year_estimate, days, days_in_previous_years(year_estimate))
-
-    {year, days - days_before_year}
-  end
-
-  defp days_to_year(year, days1, days2) when year < 0 and days1 >= days2 do
-    days_to_year(year + 1, days1, days_to_end_of_epoch(year + 1))
-  end
-
-  defp days_to_year(year, days1, days2) when year >= 0 and days1 < days2 do
-    days_to_year(year - 1, days1, days_in_previous_years(year - 1))
-  end
-
-  defp days_to_year(year, _days1, days2) do
-    {year, days2}
-  end
-
-  defp days_to_end_of_epoch(year) when year < 0 do
-    previous_year = year + 1
-
-    div(previous_year, 4) - div(previous_year, 100) + div(previous_year, 400) +
-      previous_year * @days_per_nonleap_year
-  end
-
-  defp days_in_previous_years(0), do: 0
-
-  defp days_in_previous_years(year) do
-    previous_year = year - 1
-
-    Integer.floor_div(previous_year, 4) - Integer.floor_div(previous_year, 100) +
-      Integer.floor_div(previous_year, 400) + previous_year * @days_per_nonleap_year +
-      @days_per_leap_year
-  end
-
-  # Note that 0 is the first day of the month.
-  defp year_day_to_year_date(_extra_day, day_of_year) when day_of_year < 31 do
-    {1, day_of_year}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 59 + extra_day do
-    {2, day_of_year - 31}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 90 + extra_day do
-    {3, day_of_year - (59 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 120 + extra_day do
-    {4, day_of_year - (90 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 151 + extra_day do
-    {5, day_of_year - (120 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 181 + extra_day do
-    {6, day_of_year - (151 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 212 + extra_day do
-    {7, day_of_year - (181 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 243 + extra_day do
-    {8, day_of_year - (212 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 273 + extra_day do
-    {9, day_of_year - (243 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 304 + extra_day do
-    {10, day_of_year - (273 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) when day_of_year < 334 + extra_day do
-    {11, day_of_year - (304 + extra_day)}
-  end
-
-  defp year_day_to_year_date(extra_day, day_of_year) do
-    {12, day_of_year - (334 + extra_day)}
-  end
-
-  defp iso_seconds_to_datetime(seconds) do
-    {days, rest_seconds} = div_mod(seconds, @seconds_per_day)
-
-    date = date_from_iso_days(days)
-    time = seconds_to_time(rest_seconds)
-    {date, time}
-  end
-
-  defp seconds_to_time(seconds) when seconds in 0..@last_second_of_the_day do
-    {hour, rest_seconds} = div_mod(seconds, @seconds_per_hour)
-    {minute, second} = div_mod(rest_seconds, @seconds_per_minute)
-
-    {hour, minute, second}
-  end
-end

lib/elixir/lib/calendar/naive_datetime.ex

@@ -1,982 +0,0 @@
-defmodule NaiveDateTime do
-  @moduledoc """
-  A NaiveDateTime struct (without a time zone) and functions.
-
-  The NaiveDateTime struct contains the fields year, month, day, hour,
-  minute, second, microsecond and calendar. New naive datetimes can be
-  built with the `new/2` and `new/8` functions or using the
-  `~N` (see `Kernel.sigil_N/2`) sigil:
-
-      iex> ~N[2000-01-01 23:00:07]
-      ~N[2000-01-01 23:00:07]
-
-  The date and time fields in the struct can be accessed directly:
-
-      iex> naive = ~N[2000-01-01 23:00:07]
-      iex> naive.year
-      2000
-      iex> naive.second
-      7
-
-  We call them "naive" because this datetime representation does not
-  have a time zone. This means the datetime may not actually exist in
-  certain areas in the world even though it is valid.
-
-  For example, when daylight saving changes are applied by a region,
-  the clock typically moves forward or backward by one hour. This means
-  certain datetimes never occur or may occur more than once. Since
-  `NaiveDateTime` is not validated against a time zone, such errors
-  would go unnoticed.
-
-  Developers should avoid creating the NaiveDateTime structs directly
-  and instead, rely on the functions provided by this module as well
-  as the ones in third-party calendar libraries.
-
-  ## Comparing naive date times
-
-  Comparisons in Elixir using `==/2`, `>/2`, `</2` and similar are structural
-  and based on the `NaiveDateTime` struct fields. For proper comparison
-  between naive datetimes, use the `compare/2` function.
-
-  ## Using epochs
-
-  The `add/3` and `diff/3` functions can be used for computing with
-  date times or retrieving the number of seconds between instants.
-  For example, if there is an interest in computing the number of
-  seconds from the Unix epoch (1970-01-01 00:00:00):
-
-      iex> NaiveDateTime.diff(~N[2010-04-17 14:00:00], ~N[1970-01-01 00:00:00])
-      1271512800
-
-      iex> NaiveDateTime.add(~N[1970-01-01 00:00:00], 1_271_512_800)
-      ~N[2010-04-17 14:00:00]
-
-  Those functions are optimized to deal with common epochs, such
-  as the Unix Epoch above or the Gregorian Epoch (0000-01-01 00:00:00).
-  """
-
-  @enforce_keys [:year, :month, :day, :hour, :minute, :second]
-  defstruct [
-    :year,
-    :month,
-    :day,
-    :hour,
-    :minute,
-    :second,
-    microsecond: {0, 0},
-    calendar: Calendar.ISO
-  ]
-
-  @type t :: %__MODULE__{
-          year: Calendar.year(),
-          month: Calendar.month(),
-          day: Calendar.day(),
-          calendar: Calendar.calendar(),
-          hour: Calendar.hour(),
-          minute: Calendar.minute(),
-          second: Calendar.second(),
-          microsecond: Calendar.microsecond()
-        }
-
-  @doc """
-  Returns the current naive datetime in UTC.
-
-  Prefer using `DateTime.utc_now/0` when possible as, opposite
-  to `NaiveDateTime`, it will keep the time zone information.
-
-  ## Examples
-
-      iex> naive_datetime = NaiveDateTime.utc_now()
-      iex> naive_datetime.year >= 2016
-      true
-
-  """
-  @doc since: "1.4.0"
-  @spec utc_now(Calendar.calendar()) :: t
-  def utc_now(calendar \\ Calendar.ISO)
-
-  def utc_now(Calendar.ISO) do
-    {:ok, {year, month, day}, {hour, minute, second}, microsecond} =
-      Calendar.ISO.from_unix(:os.system_time(), :native)
-
-    %NaiveDateTime{
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: Calendar.ISO
-    }
-  end
-
-  def utc_now(calendar) do
-    calendar
-    |> DateTime.utc_now()
-    |> DateTime.to_naive()
-  end
-
-  @doc """
-  Builds a new ISO naive datetime.
-
-  Expects all values to be integers. Returns `{:ok, naive_datetime}`
-  if each entry fits its appropriate range, returns `{:error, reason}`
-  otherwise.
-
-  ## Examples
-
-      iex> NaiveDateTime.new(2000, 1, 1, 0, 0, 0)
-      {:ok, ~N[2000-01-01 00:00:00]}
-      iex> NaiveDateTime.new(2000, 13, 1, 0, 0, 0)
-      {:error, :invalid_date}
-      iex> NaiveDateTime.new(2000, 2, 29, 0, 0, 0)
-      {:ok, ~N[2000-02-29 00:00:00]}
-      iex> NaiveDateTime.new(2000, 2, 30, 0, 0, 0)
-      {:error, :invalid_date}
-      iex> NaiveDateTime.new(2001, 2, 29, 0, 0, 0)
-      {:error, :invalid_date}
-
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 59, 59, {0, 1})
-      {:ok, ~N[2000-01-01 23:59:59.0]}
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 59, 59, 999_999)
-      {:ok, ~N[2000-01-01 23:59:59.999999]}
-      iex> NaiveDateTime.new(2000, 1, 1, 24, 59, 59, 999_999)
-      {:error, :invalid_time}
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 60, 59, 999_999)
-      {:error, :invalid_time}
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 59, 60, 999_999)
-      {:error, :invalid_time}
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 59, 59, 1_000_000)
-      {:error, :invalid_time}
-
-      iex> NaiveDateTime.new(2000, 1, 1, 23, 59, 59, {0, 1}, Calendar.ISO)
-      {:ok, ~N[2000-01-01 23:59:59.0]}
-
-  """
-  @spec new(
-          Calendar.year(),
-          Calendar.month(),
-          Calendar.day(),
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond(),
-          Calendar.calendar()
-        ) :: {:ok, t} | {:error, atom}
-  def new(year, month, day, hour, minute, second, microsecond \\ {0, 0}, calendar \\ Calendar.ISO)
-
-  def new(year, month, day, hour, minute, second, microsecond, calendar)
-      when is_integer(microsecond) do
-    new(year, month, day, hour, minute, second, {microsecond, 6}, calendar)
-  end
-
-  def new(year, month, day, hour, minute, second, microsecond, calendar) do
-    cond do
-      not calendar.valid_date?(year, month, day) ->
-        {:error, :invalid_date}
-
-      not calendar.valid_time?(hour, minute, second, microsecond) ->
-        {:error, :invalid_time}
-
-      true ->
-        naive_datetime = %NaiveDateTime{
-          calendar: calendar,
-          year: year,
-          month: month,
-          day: day,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        }
-
-        {:ok, naive_datetime}
-    end
-  end
-
-  @doc """
-  Builds a naive datetime from date and time structs.
-
-  ## Examples
-
-      iex> NaiveDateTime.new(~D[2010-01-13], ~T[23:00:07.005])
-      {:ok, ~N[2010-01-13 23:00:07.005]}
-
-  """
-  @spec new(Date.t(), Time.t()) :: {:ok, t}
-  def new(date, time)
-
-  def new(%Date{calendar: calendar} = date, %Time{calendar: calendar} = time) do
-    %{year: year, month: month, day: day} = date
-    %{hour: hour, minute: minute, second: second, microsecond: microsecond} = time
-
-    naive_datetime = %NaiveDateTime{
-      calendar: calendar,
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    }
-
-    {:ok, naive_datetime}
-  end
-
-  @doc """
-  Adds a specified amount of time to a `NaiveDateTime`.
-
-  Accepts an `amount_to_add` in any `unit` available from `t:System.time_unit/0`.
-  Negative values will move backwards in time.
-
-  ## Examples
-
-      # adds seconds by default
-      iex> NaiveDateTime.add(~N[2014-10-02 00:29:10], 2)
-      ~N[2014-10-02 00:29:12]
-
-      # accepts negative offsets
-      iex> NaiveDateTime.add(~N[2014-10-02 00:29:10], -2)
-      ~N[2014-10-02 00:29:08]
-
-      # can work with other units
-      iex> NaiveDateTime.add(~N[2014-10-02 00:29:10], 2_000, :millisecond)
-      ~N[2014-10-02 00:29:12]
-
-      # keeps the same precision
-      iex> NaiveDateTime.add(~N[2014-10-02 00:29:10.021], 21, :second)
-      ~N[2014-10-02 00:29:31.021]
-
-      # changes below the precision will not be visible
-      iex> hidden = NaiveDateTime.add(~N[2014-10-02 00:29:10], 21, :millisecond)
-      iex> hidden.microsecond # ~N[2014-10-02 00:29:10]
-      {21000, 0}
-
-      # from Gregorian seconds
-      iex> NaiveDateTime.add(~N[0000-01-01 00:00:00], 63_579_428_950)
-      ~N[2014-10-02 00:29:10]
-
-  Passing a `Datetime` automatically converts it to `NaiveDateTime`,
-  discarding the time zone information:
-
-      iex> dt = %DateTime{year: 2000, month: 2, day: 29, zone_abbr: "CET",
-      ...>                hour: 23, minute: 0, second: 7, microsecond: {0, 0},
-      ...>                utc_offset: 3600, std_offset: 0, time_zone: "Europe/Warsaw"}
-      iex> NaiveDateTime.add(dt, 21, :second)
-      ~N[2000-02-29 23:00:28]
-
-  """
-  @doc since: "1.4.0"
-  @spec add(Calendar.naive_datetime(), integer, System.time_unit()) :: t
-  def add(
-        %{microsecond: {_, precision}, calendar: calendar} = naive_datetime,
-        amount_to_add,
-        unit \\ :second
-      )
-      when is_integer(amount_to_add) do
-    ppd = System.convert_time_unit(86400, :second, unit)
-
-    naive_datetime
-    |> to_iso_days()
-    |> Calendar.ISO.add_day_fraction_to_iso_days(amount_to_add, ppd)
-    |> from_iso_days(calendar, precision)
-  end
-
-  @doc """
-  Subtracts `naive_datetime2` from `naive_datetime1`.
-
-  The answer can be returned in any `unit` available from `t:System.time_unit/0`.
-
-  This function returns the difference in seconds where seconds are measured
-  according to `Calendar.ISO`.
-
-  ## Examples
-
-      iex> NaiveDateTime.diff(~N[2014-10-02 00:29:12], ~N[2014-10-02 00:29:10])
-      2
-      iex> NaiveDateTime.diff(~N[2014-10-02 00:29:12], ~N[2014-10-02 00:29:10], :microsecond)
-      2_000_000
-      iex> NaiveDateTime.diff(~N[2014-10-02 00:29:10.042], ~N[2014-10-02 00:29:10.021], :millisecond)
-      21
-      iex> NaiveDateTime.diff(~N[2014-10-02 00:29:10], ~N[2014-10-02 00:29:12])
-      -2
-      iex> NaiveDateTime.diff(~N[-0001-10-02 00:29:10], ~N[-0001-10-02 00:29:12])
-      -2
-
-      # to Gregorian seconds
-      iex> NaiveDateTime.diff(~N[2014-10-02 00:29:10], ~N[0000-01-01 00:00:00])
-      63579428950
-
-  """
-  @doc since: "1.4.0"
-  @spec diff(Calendar.naive_datetime(), Calendar.naive_datetime(), System.time_unit()) :: integer
-  def diff(
-        %{calendar: calendar1} = naive_datetime1,
-        %{calendar: calendar2} = naive_datetime2,
-        unit \\ :second
-      ) do
-    if not Calendar.compatible_calendars?(calendar1, calendar2) do
-      raise ArgumentError,
-            "cannot calculate the difference between #{inspect(naive_datetime1)} and " <>
-              "#{inspect(naive_datetime2)} because their calendars are not compatible " <>
-              "and thus the result would be ambiguous"
-    end
-
-    units1 = naive_datetime1 |> to_iso_days() |> Calendar.ISO.iso_days_to_unit(unit)
-    units2 = naive_datetime2 |> to_iso_days() |> Calendar.ISO.iso_days_to_unit(unit)
-    units1 - units2
-  end
-
-  @doc """
-  Returns the given naive datetime with the microsecond field truncated to the
-  given precision (`:microsecond`, `:millisecond` or `:second`).
-
-  The given naive datetime is returned unchanged if it already has lower precision
-  than the given precision.
-
-  ## Examples
-
-      iex> NaiveDateTime.truncate(~N[2017-11-06 00:23:51.123456], :microsecond)
-      ~N[2017-11-06 00:23:51.123456]
-
-      iex> NaiveDateTime.truncate(~N[2017-11-06 00:23:51.123456], :millisecond)
-      ~N[2017-11-06 00:23:51.123]
-
-      iex> NaiveDateTime.truncate(~N[2017-11-06 00:23:51.123456], :second)
-      ~N[2017-11-06 00:23:51]
-
-  """
-  @doc since: "1.6.0"
-  @spec truncate(t(), :microsecond | :millisecond | :second) :: t()
-  def truncate(%NaiveDateTime{microsecond: microsecond} = naive_datetime, precision) do
-    %{naive_datetime | microsecond: Calendar.truncate(microsecond, precision)}
-  end
-
-  def truncate(
-        %{
-          calendar: calendar,
-          year: year,
-          month: month,
-          day: day,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        },
-        precision
-      ) do
-    %NaiveDateTime{
-      calendar: calendar,
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: Calendar.truncate(microsecond, precision)
-    }
-  end
-
-  @doc """
-  Converts a `NaiveDateTime` into a `Date`.
-
-  Because `Date` does not hold time information,
-  data will be lost during the conversion.
-
-  ## Examples
-
-      iex> NaiveDateTime.to_date(~N[2002-01-13 23:00:07])
-      ~D[2002-01-13]
-
-  """
-  @spec to_date(Calendar.naive_datetime()) :: Date.t()
-  def to_date(%NaiveDateTime{year: year, month: month, day: day, calendar: calendar}) do
-    %Date{year: year, month: month, day: day, calendar: calendar}
-  end
-
-  def to_date(%{
-        year: year,
-        month: month,
-        day: day,
-        calendar: calendar,
-        hour: _,
-        minute: _,
-        second: _,
-        microsecond: _
-      }) do
-    %Date{year: year, month: month, day: day, calendar: calendar}
-  end
-
-  @doc """
-  Converts a `NaiveDateTime` into `Time`.
-
-  Because `Time` does not hold date information,
-  data will be lost during the conversion.
-
-  ## Examples
-
-      iex> NaiveDateTime.to_time(~N[2002-01-13 23:00:07])
-      ~T[23:00:07]
-
-  """
-  @spec to_time(Calendar.naive_datetime()) :: Time.t()
-  def to_time(%NaiveDateTime{} = naive_datetime) do
-    %{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: calendar
-    } = naive_datetime
-
-    %Time{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: calendar
-    }
-  end
-
-  def to_time(%{
-        year: _,
-        month: _,
-        day: _,
-        calendar: calendar,
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond
-      }) do
-    %Time{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: calendar
-    }
-  end
-
-  @doc """
-  Converts the given naive datetime to a string according to its calendar.
-
-  ### Examples
-
-      iex> NaiveDateTime.to_string(~N[2000-02-28 23:00:13])
-      "2000-02-28 23:00:13"
-      iex> NaiveDateTime.to_string(~N[2000-02-28 23:00:13.001])
-      "2000-02-28 23:00:13.001"
-      iex> NaiveDateTime.to_string(~N[-0100-12-15 03:20:31])
-      "-0100-12-15 03:20:31"
-
-  This function can also be used to convert a DateTime to a string without
-  the time zone information:
-
-      iex> dt = %DateTime{year: 2000, month: 2, day: 29, zone_abbr: "CET",
-      ...>                hour: 23, minute: 0, second: 7, microsecond: {0, 0},
-      ...>                utc_offset: 3600, std_offset: 0, time_zone: "Europe/Warsaw"}
-      iex> NaiveDateTime.to_string(dt)
-      "2000-02-29 23:00:07"
-
-  """
-  @spec to_string(Calendar.naive_datetime()) :: String.t()
-  def to_string(%{calendar: calendar} = naive_datetime) do
-    %{
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    } = naive_datetime
-
-    calendar.naive_datetime_to_string(year, month, day, hour, minute, second, microsecond)
-  end
-
-  @doc """
-  Parses the extended "Date and time of day" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  Time zone offset may be included in the string but they will be
-  simply discarded as such information is not included in naive date
-  times.
-
-  As specified in the standard, the separator "T" may be omitted if
-  desired as there is no ambiguity within this function.
-
-  The year parsed by this function is limited to four digits and,
-  while ISO 8601 allows datetimes to specify 24:00:00 as the zero
-  hour of the next day, this notation is not supported by Elixir.
-  Note leap seconds are not supported by the built-in Calendar.ISO.
-
-  ## Examples
-
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:07")
-      {:ok, ~N[2015-01-23 23:50:07]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07")
-      {:ok, ~N[2015-01-23 23:50:07]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07Z")
-      {:ok, ~N[2015-01-23 23:50:07]}
-
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:07.0")
-      {:ok, ~N[2015-01-23 23:50:07.0]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:07,0123456")
-      {:ok, ~N[2015-01-23 23:50:07.012345]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:07.0123456")
-      {:ok, ~N[2015-01-23 23:50:07.012345]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123Z")
-      {:ok, ~N[2015-01-23 23:50:07.123]}
-
-      iex> NaiveDateTime.from_iso8601("2015-01-23P23:50:07")
-      {:error, :invalid_format}
-      iex> NaiveDateTime.from_iso8601("2015:01:23 23-50-07")
-      {:error, :invalid_format}
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:07A")
-      {:error, :invalid_format}
-      iex> NaiveDateTime.from_iso8601("2015-01-23 23:50:61")
-      {:error, :invalid_time}
-      iex> NaiveDateTime.from_iso8601("2015-01-32 23:50:07")
-      {:error, :invalid_date}
-
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123+02:30")
-      {:ok, ~N[2015-01-23 23:50:07.123]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123+00:00")
-      {:ok, ~N[2015-01-23 23:50:07.123]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123-02:30")
-      {:ok, ~N[2015-01-23 23:50:07.123]}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123-00:00")
-      {:error, :invalid_format}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123-00:60")
-      {:error, :invalid_format}
-      iex> NaiveDateTime.from_iso8601("2015-01-23T23:50:07.123-24:00")
-      {:error, :invalid_format}
-
-  """
-  @spec from_iso8601(String.t(), Calendar.calendar()) :: {:ok, t} | {:error, atom}
-  def from_iso8601(string, calendar \\ Calendar.ISO)
-
-  def from_iso8601(<<?-, rest::binary>>, calendar) do
-    with {:ok, %{year: year} = naive_datetime} <- raw_from_iso8601(rest, calendar) do
-      {:ok, %{naive_datetime | year: -year}}
-    end
-  end
-
-  def from_iso8601(<<rest::binary>>, calendar) do
-    raw_from_iso8601(rest, calendar)
-  end
-
-  @sep [?\s, ?T]
-  [match_date, guard_date, read_date] = Calendar.ISO.__match_date__()
-  [match_time, guard_time, read_time] = Calendar.ISO.__match_time__()
-
-  defp raw_from_iso8601(string, calendar) do
-    with <<unquote(match_date), sep, unquote(match_time), rest::binary>> <- string,
-         true <- unquote(guard_date) and sep in @sep and unquote(guard_time),
-         {microsec, rest} <- Calendar.ISO.parse_microsecond(rest),
-         {_offset, ""} <- Calendar.ISO.parse_offset(rest) do
-      {year, month, day} = unquote(read_date)
-      {hour, min, sec} = unquote(read_time)
-
-      with {:ok, iso_naive_dt} <- new(year, month, day, hour, min, sec, microsec, Calendar.ISO) do
-        convert(iso_naive_dt, calendar)
-      end
-    else
-      _ -> {:error, :invalid_format}
-    end
-  end
-
-  @doc """
-  Parses the extended "Date and time of day" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  Raises if the format is invalid.
-
-  ## Examples
-
-      iex> NaiveDateTime.from_iso8601!("2015-01-23T23:50:07.123Z")
-      ~N[2015-01-23 23:50:07.123]
-      iex> NaiveDateTime.from_iso8601!("2015-01-23T23:50:07,123Z")
-      ~N[2015-01-23 23:50:07.123]
-      iex> NaiveDateTime.from_iso8601!("2015-01-23P23:50:07")
-      ** (ArgumentError) cannot parse "2015-01-23P23:50:07" as naive datetime, reason: :invalid_format
-
-  """
-  @spec from_iso8601!(String.t(), Calendar.calendar()) :: t
-  def from_iso8601!(string, calendar \\ Calendar.ISO) do
-    case from_iso8601(string, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot parse #{inspect(string)} as naive datetime, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Converts the given naive datetime to
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  By default, `NaiveDateTime.to_iso8601/2` returns naive datetimes formatted in the "extended"
-  format, for human readability. It also supports the "basic" format through passing the `:basic` option.
-
-  Only supports converting naive datetimes which are in the ISO calendar,
-  attempting to convert naive datetimes from other calendars will raise.
-
-  ### Examples
-
-      iex> NaiveDateTime.to_iso8601(~N[2000-02-28 23:00:13])
-      "2000-02-28T23:00:13"
-
-      iex> NaiveDateTime.to_iso8601(~N[2000-02-28 23:00:13.001])
-      "2000-02-28T23:00:13.001"
-
-      iex> NaiveDateTime.to_iso8601(~N[2000-02-28 23:00:13.001], :basic)
-      "20000228T230013.001"
-
-  This function can also be used to convert a DateTime to ISO 8601 without
-  the time zone information:
-
-      iex> dt = %DateTime{year: 2000, month: 2, day: 29, zone_abbr: "CET",
-      ...>                hour: 23, minute: 0, second: 7, microsecond: {0, 0},
-      ...>                utc_offset: 3600, std_offset: 0, time_zone: "Europe/Warsaw"}
-      iex> NaiveDateTime.to_iso8601(dt)
-      "2000-02-29T23:00:07"
-
-  """
-  @spec to_iso8601(Calendar.naive_datetime(), :basic | :extended) :: String.t()
-  def to_iso8601(naive_datetime, format \\ :extended)
-
-  def to_iso8601(%{calendar: Calendar.ISO} = naive_datetime, format)
-      when format in [:basic, :extended] do
-    %{
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    } = naive_datetime
-
-    Calendar.ISO.naive_datetime_to_iso8601(
-      year,
-      month,
-      day,
-      hour,
-      minute,
-      second,
-      microsecond,
-      format
-    )
-  end
-
-  def to_iso8601(%{calendar: _} = naive_datetime, format) when format in [:basic, :extended] do
-    naive_datetime
-    |> convert!(Calendar.ISO)
-    |> to_iso8601(format)
-  end
-
-  @doc """
-  Converts a `NaiveDateTime` struct to an Erlang datetime tuple.
-
-  Only supports converting naive datetimes which are in the ISO calendar,
-  attempting to convert naive datetimes from other calendars will raise.
-
-  WARNING: Loss of precision may occur, as Erlang time tuples only store
-  hour/minute/second.
-
-  ## Examples
-
-      iex> NaiveDateTime.to_erl(~N[2000-01-01 13:30:15])
-      {{2000, 1, 1}, {13, 30, 15}}
-
-  This function can also be used to convert a DateTime to a erl format
-  without the time zone information:
-
-      iex> dt = %DateTime{year: 2000, month: 2, day: 29, zone_abbr: "CET",
-      ...>                hour: 23, minute: 0, second: 7, microsecond: {0, 0},
-      ...>                utc_offset: 3600, std_offset: 0, time_zone: "Europe/Warsaw"}
-      iex> NaiveDateTime.to_erl(dt)
-      {{2000, 2, 29}, {23, 00, 07}}
-
-  """
-  @spec to_erl(Calendar.naive_datetime()) :: :calendar.datetime()
-  def to_erl(%{calendar: _} = naive_datetime) do
-    %{year: year, month: month, day: day, hour: hour, minute: minute, second: second} =
-      convert!(naive_datetime, Calendar.ISO)
-
-    {{year, month, day}, {hour, minute, second}}
-  end
-
-  @doc """
-  Converts an Erlang datetime tuple to a `NaiveDateTime` struct.
-
-  Attempting to convert an invalid ISO calendar date will produce an error tuple.
-
-  ## Examples
-
-      iex> NaiveDateTime.from_erl({{2000, 1, 1}, {13, 30, 15}})
-      {:ok, ~N[2000-01-01 13:30:15]}
-      iex> NaiveDateTime.from_erl({{2000, 1, 1}, {13, 30, 15}}, {5000, 3})
-      {:ok, ~N[2000-01-01 13:30:15.005]}
-      iex> NaiveDateTime.from_erl({{2000, 13, 1}, {13, 30, 15}})
-      {:error, :invalid_date}
-      iex> NaiveDateTime.from_erl({{2000, 13, 1}, {13, 30, 15}})
-      {:error, :invalid_date}
-
-  """
-  @spec from_erl(:calendar.datetime(), Calendar.microsecond(), Calendar.calendar()) ::
-          {:ok, t} | {:error, atom}
-  def from_erl(tuple, microsecond \\ {0, 0}, calendar \\ Calendar.ISO)
-
-  def from_erl({{year, month, day}, {hour, minute, second}}, microsecond, calendar) do
-    with {:ok, iso_naive_dt} <- new(year, month, day, hour, minute, second, microsecond),
-         do: convert(iso_naive_dt, calendar)
-  end
-
-  @doc """
-  Converts an Erlang datetime tuple to a `NaiveDateTime` struct.
-
-  Raises if the datetime is invalid.
-  Attempting to convert an invalid ISO calendar date will produce an error tuple.
-
-  ## Examples
-
-      iex> NaiveDateTime.from_erl!({{2000, 1, 1}, {13, 30, 15}})
-      ~N[2000-01-01 13:30:15]
-      iex> NaiveDateTime.from_erl!({{2000, 1, 1}, {13, 30, 15}}, {5000, 3})
-      ~N[2000-01-01 13:30:15.005]
-      iex> NaiveDateTime.from_erl!({{2000, 13, 1}, {13, 30, 15}})
-      ** (ArgumentError) cannot convert {{2000, 13, 1}, {13, 30, 15}} to naive datetime, reason: :invalid_date
-
-  """
-  @spec from_erl!(:calendar.datetime(), Calendar.microsecond(), Calendar.calendar()) :: t
-  def from_erl!(tuple, microsecond \\ {0, 0}, calendar \\ Calendar.ISO) do
-    case from_erl(tuple, microsecond, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(tuple)} to naive datetime, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Compares two `NaiveDateTime` structs.
-
-  Returns `:gt` if first is later than the second
-  and `:lt` for vice versa. If the two NaiveDateTime
-  are equal `:eq` is returned.
-
-  ## Examples
-
-      iex> NaiveDateTime.compare(~N[2016-04-16 13:30:15], ~N[2016-04-28 16:19:25])
-      :lt
-      iex> NaiveDateTime.compare(~N[2016-04-16 13:30:15.1], ~N[2016-04-16 13:30:15.01])
-      :gt
-
-  This function can also be used to compare a DateTime without
-  the time zone information:
-
-      iex> dt = %DateTime{year: 2000, month: 2, day: 29, zone_abbr: "CET",
-      ...>                hour: 23, minute: 0, second: 7, microsecond: {0, 0},
-      ...>                utc_offset: 3600, std_offset: 0, time_zone: "Europe/Warsaw"}
-      iex> NaiveDateTime.compare(dt, ~N[2000-02-29 23:00:07])
-      :eq
-      iex> NaiveDateTime.compare(dt, ~N[2000-01-29 23:00:07])
-      :gt
-      iex> NaiveDateTime.compare(dt, ~N[2000-03-29 23:00:07])
-      :lt
-
-  """
-  @doc since: "1.4.0"
-  @spec compare(Calendar.naive_datetime(), Calendar.naive_datetime()) :: :lt | :eq | :gt
-  def compare(%{calendar: calendar1} = naive_datetime1, %{calendar: calendar2} = naive_datetime2) do
-    if Calendar.compatible_calendars?(calendar1, calendar2) do
-      case {to_iso_days(naive_datetime1), to_iso_days(naive_datetime2)} do
-        {first, second} when first > second -> :gt
-        {first, second} when first < second -> :lt
-        _ -> :eq
-      end
-    else
-      raise ArgumentError, """
-      cannot compare #{inspect(naive_datetime1)} with #{inspect(naive_datetime2)}.
-
-      This comparison would be ambiguous as their calendars have incompatible day rollover moments.
-      Specify an exact time of day (using `DateTime`s) to resolve this ambiguity
-      """
-    end
-  end
-
-  @doc """
-  Converts the given `naive_datetime` from one calendar to another.
-
-  If it is not possible to convert unambiguously between the calendars
-  (see `Calendar.compatible_calendars?/2`), an `{:error, :incompatible_calendars}` tuple
-  is returned.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> NaiveDateTime.convert(~N[2000-01-01 13:30:15], Calendar.Holocene)
-      {:ok, %NaiveDateTime{calendar: Calendar.Holocene, year: 12000, month: 1, day: 1,
-                           hour: 13, minute: 30, second: 15, microsecond: {0, 0}}}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert(Calendar.naive_datetime(), Calendar.calendar()) ::
-          {:ok, t} | {:error, :incompatible_calendars}
-
-  # Keep it multiline for proper function clause errors.
-  def convert(
-        %{
-          calendar: calendar,
-          year: year,
-          month: month,
-          day: day,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        },
-        calendar
-      ) do
-    naive_datetime = %NaiveDateTime{
-      calendar: calendar,
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    }
-
-    {:ok, naive_datetime}
-  end
-
-  def convert(%{calendar: ndt_calendar, microsecond: {_, precision}} = naive_datetime, calendar) do
-    if Calendar.compatible_calendars?(ndt_calendar, calendar) do
-      result_naive_datetime =
-        naive_datetime
-        |> to_iso_days
-        |> from_iso_days(calendar, precision)
-
-      {:ok, result_naive_datetime}
-    else
-      {:error, :incompatible_calendars}
-    end
-  end
-
-  @doc """
-  Converts the given `naive_datetime` from one calendar to another.
-
-  If it is not possible to convert unambiguously between the calendars
-  (see `Calendar.compatible_calendars?/2`), an ArgumentError is raised.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> NaiveDateTime.convert!(~N[2000-01-01 13:30:15], Calendar.Holocene)
-      %NaiveDateTime{calendar: Calendar.Holocene, year: 12000, month: 1, day: 1,
-                     hour: 13, minute: 30, second: 15, microsecond: {0, 0}}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert!(Calendar.naive_datetime(), Calendar.calendar()) :: t
-  def convert!(naive_datetime, calendar) do
-    case convert(naive_datetime, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, :incompatible_calendars} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(naive_datetime)} to target calendar #{inspect(calendar)}, " <>
-                "reason: #{inspect(naive_datetime.calendar)} and #{inspect(calendar)} " <>
-                "have different day rollover moments, making this conversion ambiguous"
-    end
-  end
-
-  ## Helpers
-
-  # Keep it multiline for proper function clause errors.
-  defp to_iso_days(%{
-         calendar: calendar,
-         year: year,
-         month: month,
-         day: day,
-         hour: hour,
-         minute: minute,
-         second: second,
-         microsecond: microsecond
-       }) do
-    calendar.naive_datetime_to_iso_days(year, month, day, hour, minute, second, microsecond)
-  end
-
-  defp from_iso_days(iso_days, calendar, precision) do
-    {year, month, day, hour, minute, second, {microsecond, _}} =
-      calendar.naive_datetime_from_iso_days(iso_days)
-
-    %NaiveDateTime{
-      calendar: calendar,
-      year: year,
-      month: month,
-      day: day,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: {microsecond, precision}
-    }
-  end
-
-  defimpl String.Chars do
-    def to_string(naive_datetime) do
-      %{
-        calendar: calendar,
-        year: year,
-        month: month,
-        day: day,
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond
-      } = naive_datetime
-
-      calendar.naive_datetime_to_string(year, month, day, hour, minute, second, microsecond)
-    end
-  end
-
-  defimpl Inspect do
-    def inspect(%{calendar: Calendar.ISO} = naive_datetime, _) do
-      %{
-        year: year,
-        month: month,
-        day: day,
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond
-      } = naive_datetime
-
-      formatted =
-        Calendar.ISO.naive_datetime_to_string(year, month, day, hour, minute, second, microsecond)
-
-      "~N[" <> formatted <> "]"
-    end
-
-    def inspect(naive, opts) do
-      Inspect.Any.inspect(naive, opts)
-    end
-  end
-end

lib/elixir/lib/calendar/time.ex

@@ -1,712 +0,0 @@
-defmodule Time do
-  @moduledoc """
-  A Time struct and functions.
-
-  The Time struct contains the fields hour, minute, second and microseconds.
-  New times can be built with the `new/4` function or using the
-  `~T` (see `Kernel.sigil_T/2`) sigil:
-
-      iex> ~T[23:00:07.001]
-      ~T[23:00:07.001]
-
-  Both `new/4` and sigil return a struct where the time fields can
-  be accessed directly:
-
-      iex> time = ~T[23:00:07.001]
-      iex> time.hour
-      23
-      iex> time.microsecond
-      {1000, 3}
-
-  The functions on this module work with the `Time` struct as well
-  as any struct that contains the same fields as the `Time` struct,
-  such as `NaiveDateTime` and `DateTime`. Such functions expect
-  `t:Calendar.time/0` in their typespecs (instead of `t:t/0`).
-
-  Developers should avoid creating the Time structs directly
-  and instead rely on the functions provided by this module as well
-  as the ones in third-party calendar libraries.
-
-  ## Comparing times
-
-  Comparisons in Elixir using `==/2`, `>/2`, `</2` and similar are structural
-  and based on the `Time` struct fields. For proper comparison between
-  times, use the `compare/2` function.
-  """
-
-  @enforce_keys [:hour, :minute, :second]
-  defstruct [:hour, :minute, :second, microsecond: {0, 0}, calendar: Calendar.ISO]
-
-  @type t :: %__MODULE__{
-          hour: Calendar.hour(),
-          minute: Calendar.minute(),
-          second: Calendar.second(),
-          microsecond: Calendar.microsecond(),
-          calendar: Calendar.calendar()
-        }
-
-  @parts_per_day 86_400_000_000
-
-  @doc """
-  Returns the current time in UTC.
-
-  ## Examples
-
-      iex> time = Time.utc_now()
-      iex> time.hour >= 0
-      true
-
-  """
-  @doc since: "1.4.0"
-  @spec utc_now(Calendar.calendar()) :: t
-  def utc_now(calendar \\ Calendar.ISO) do
-    {:ok, _, time, microsecond} = Calendar.ISO.from_unix(:os.system_time(), :native)
-    {hour, minute, second} = time
-
-    iso_time = %Time{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: Calendar.ISO
-    }
-
-    convert!(iso_time, calendar)
-  end
-
-  @doc """
-  Builds a new time.
-
-  Expects all values to be integers. Returns `{:ok, time}` if each
-  entry fits its appropriate range, returns `{:error, reason}` otherwise.
-
-  Microseconds can also be given with a precision, which must be an
-  integer between 0 and 6.
-
-  The built-in calendar does not support leap seconds.
-
-  ## Examples
-
-      iex> Time.new(0, 0, 0, 0)
-      {:ok, ~T[00:00:00.000000]}
-      iex> Time.new(23, 59, 59, 999_999)
-      {:ok, ~T[23:59:59.999999]}
-
-      iex> Time.new(24, 59, 59, 999_999)
-      {:error, :invalid_time}
-      iex> Time.new(23, 60, 59, 999_999)
-      {:error, :invalid_time}
-      iex> Time.new(23, 59, 60, 999_999)
-      {:error, :invalid_time}
-      iex> Time.new(23, 59, 59, 1_000_000)
-      {:error, :invalid_time}
-
-      # Invalid precision
-      Time.new(23, 59, 59, {999_999, 10})
-      {:error, :invalid_time}
-
-  """
-  @spec new(
-          Calendar.hour(),
-          Calendar.minute(),
-          Calendar.second(),
-          Calendar.microsecond() | integer,
-          Calendar.calendar()
-        ) :: {:ok, t} | {:error, atom}
-  def new(hour, minute, second, microsecond \\ {0, 0}, calendar \\ Calendar.ISO)
-
-  def new(hour, minute, second, microsecond, calendar) when is_integer(microsecond) do
-    new(hour, minute, second, {microsecond, 6}, calendar)
-  end
-
-  def new(hour, minute, second, {microsecond, precision}, calendar)
-      when is_integer(hour) and is_integer(minute) and is_integer(second) and
-             is_integer(microsecond) and is_integer(precision) do
-    case calendar.valid_time?(hour, minute, second, {microsecond, precision}) do
-      true ->
-        time = %Time{
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: {microsecond, precision},
-          calendar: calendar
-        }
-
-        {:ok, time}
-
-      false ->
-        {:error, :invalid_time}
-    end
-  end
-
-  @doc """
-  Converts the given `time` to a string.
-
-  ### Examples
-
-      iex> Time.to_string(~T[23:00:00])
-      "23:00:00"
-      iex> Time.to_string(~T[23:00:00.001])
-      "23:00:00.001"
-      iex> Time.to_string(~T[23:00:00.123456])
-      "23:00:00.123456"
-
-      iex> Time.to_string(~N[2015-01-01 23:00:00.001])
-      "23:00:00.001"
-      iex> Time.to_string(~N[2015-01-01 23:00:00.123456])
-      "23:00:00.123456"
-
-  """
-  @spec to_string(Calendar.time()) :: String.t()
-  def to_string(time)
-
-  def to_string(%{
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond,
-        calendar: calendar
-      }) do
-    calendar.time_to_string(hour, minute, second, microsecond)
-  end
-
-  @doc """
-  Parses the extended "Local time" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  Time zone offset may be included in the string but they will be
-  simply discarded as such information is not included in times.
-
-  As specified in the standard, the separator "T" may be omitted if
-  desired as there is no ambiguity within this function.
-
-  Time representations with reduced accuracy are not supported.
-
-  Note that while ISO 8601 allows times to specify 24:00:00 as the
-  zero hour of the next day, this notation is not supported by Elixir.
-  Leap seconds are not supported as well by the built-in Calendar.ISO.
-
-  ## Examples
-
-      iex> Time.from_iso8601("23:50:07")
-      {:ok, ~T[23:50:07]}
-      iex> Time.from_iso8601("23:50:07Z")
-      {:ok, ~T[23:50:07]}
-      iex> Time.from_iso8601("T23:50:07Z")
-      {:ok, ~T[23:50:07]}
-
-      iex> Time.from_iso8601("23:50:07,0123456")
-      {:ok, ~T[23:50:07.012345]}
-      iex> Time.from_iso8601("23:50:07.0123456")
-      {:ok, ~T[23:50:07.012345]}
-      iex> Time.from_iso8601("23:50:07.123Z")
-      {:ok, ~T[23:50:07.123]}
-
-      iex> Time.from_iso8601("2015:01:23 23-50-07")
-      {:error, :invalid_format}
-      iex> Time.from_iso8601("23:50:07A")
-      {:error, :invalid_format}
-      iex> Time.from_iso8601("23:50:07.")
-      {:error, :invalid_format}
-      iex> Time.from_iso8601("23:50:61")
-      {:error, :invalid_time}
-
-  """
-  @spec from_iso8601(String.t(), Calendar.calendar()) :: {:ok, t} | {:error, atom}
-  def from_iso8601(string, calendar \\ Calendar.ISO)
-
-  def from_iso8601(<<?T, rest::binary>>, calendar) do
-    raw_from_iso8601(rest, calendar)
-  end
-
-  def from_iso8601(<<rest::binary>>, calendar) do
-    raw_from_iso8601(rest, calendar)
-  end
-
-  [match_time, guard_time, read_time] = Calendar.ISO.__match_time__()
-
-  defp raw_from_iso8601(string, calendar) do
-    with <<unquote(match_time), rest::binary>> <- string,
-         true <- unquote(guard_time),
-         {microsec, rest} <- Calendar.ISO.parse_microsecond(rest),
-         {_offset, ""} <- Calendar.ISO.parse_offset(rest) do
-      {hour, min, sec} = unquote(read_time)
-
-      with {:ok, utc_time} <- new(hour, min, sec, microsec, Calendar.ISO) do
-        convert(utc_time, calendar)
-      end
-    else
-      _ -> {:error, :invalid_format}
-    end
-  end
-
-  @doc """
-  Parses the extended "Local time" format described by
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  Raises if the format is invalid.
-
-  ## Examples
-
-      iex> Time.from_iso8601!("23:50:07,123Z")
-      ~T[23:50:07.123]
-      iex> Time.from_iso8601!("23:50:07.123Z")
-      ~T[23:50:07.123]
-      iex> Time.from_iso8601!("2015:01:23 23-50-07")
-      ** (ArgumentError) cannot parse "2015:01:23 23-50-07" as time, reason: :invalid_format
-
-  """
-  @spec from_iso8601!(String.t(), Calendar.calendar()) :: t
-  def from_iso8601!(string, calendar \\ Calendar.ISO) do
-    case from_iso8601(string, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError, "cannot parse #{inspect(string)} as time, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Converts the given time to
-  [ISO 8601:2004](https://en.wikipedia.org/wiki/ISO_8601).
-
-  By default, `Time.to_iso8601/2` returns times formatted in the "extended"
-  format, for human readability. It also supports the "basic" format through
-  passing the `:basic` option.
-
-  ### Examples
-
-      iex> Time.to_iso8601(~T[23:00:13])
-      "23:00:13"
-
-      iex> Time.to_iso8601(~T[23:00:13.001])
-      "23:00:13.001"
-
-      iex> Time.to_iso8601(~T[23:00:13.001], :basic)
-      "230013.001"
-
-      iex> Time.to_iso8601(~N[2010-04-17 23:00:13])
-      "23:00:13"
-
-  """
-  @spec to_iso8601(Calendar.time(), :extended | :basic) :: String.t()
-  def to_iso8601(time, format \\ :extended)
-
-  def to_iso8601(%{calendar: Calendar.ISO} = time, format) when format in [:extended, :basic] do
-    %{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    } = time
-
-    Calendar.ISO.time_to_iso8601(hour, minute, second, microsecond, format)
-  end
-
-  def to_iso8601(%{calendar: _} = time, format) when format in [:extended, :basic] do
-    time
-    |> convert!(Calendar.ISO)
-    |> to_iso8601(format)
-  end
-
-  @doc """
-  Converts given `time` to an Erlang time tuple.
-
-  WARNING: Loss of precision may occur, as Erlang time tuples
-  only contain hours/minutes/seconds.
-
-  ## Examples
-
-      iex> Time.to_erl(~T[23:30:15.999])
-      {23, 30, 15}
-
-      iex> Time.to_erl(~N[2010-04-17 23:30:15.999])
-      {23, 30, 15}
-
-  """
-  @spec to_erl(Calendar.time()) :: :calendar.time()
-  def to_erl(time) do
-    %{hour: hour, minute: minute, second: second} = convert!(time, Calendar.ISO)
-    {hour, minute, second}
-  end
-
-  @doc """
-  Converts an Erlang time tuple to a `Time` struct.
-
-  ## Examples
-
-      iex> Time.from_erl({23, 30, 15}, {5000, 3})
-      {:ok, ~T[23:30:15.005]}
-      iex> Time.from_erl({24, 30, 15})
-      {:error, :invalid_time}
-
-  """
-  @spec from_erl(:calendar.time(), Calendar.microsecond(), Calendar.calendar()) ::
-          {:ok, t} | {:error, atom}
-  def from_erl(tuple, microsecond \\ {0, 0}, calendar \\ Calendar.ISO)
-
-  def from_erl({hour, minute, second}, microsecond, calendar) do
-    with {:ok, time} <- new(hour, minute, second, microsecond, Calendar.ISO),
-         do: convert(time, calendar)
-  end
-
-  @doc """
-  Converts an Erlang time tuple to a `Time` struct.
-
-  ## Examples
-
-      iex> Time.from_erl!({23, 30, 15})
-      ~T[23:30:15]
-      iex> Time.from_erl!({23, 30, 15}, {5000, 3})
-      ~T[23:30:15.005]
-      iex> Time.from_erl!({24, 30, 15})
-      ** (ArgumentError) cannot convert {24, 30, 15} to time, reason: :invalid_time
-
-  """
-  @spec from_erl!(:calendar.time(), Calendar.microsecond(), Calendar.calendar()) :: t
-  def from_erl!(tuple, microsecond \\ {0, 0}, calendar \\ Calendar.ISO) do
-    case from_erl(tuple, microsecond, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(tuple)} to time, reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Adds the `number` of `unit`s to the given `time`.
-
-  This function accepts the `number` measured according to `Calendar.ISO`.
-  The time is returned in the same calendar as it was given in.
-
-  Note the result value represents the time of day, meaning that it is cyclic,
-  for instance, it will never go over 24 hours for the ISO calendar.
-
-  ## Examples
-
-      iex> Time.add(~T[10:00:00], 27000)
-      ~T[17:30:00.000000]
-      iex> Time.add(~T[11:00:00.005], 2400)
-      ~T[11:40:00.005000]
-      iex> Time.add(~T[00:00:00], 86_399_999, :millisecond)
-      ~T[23:59:59.999000]
-      iex> Time.add(~T[17:10:05], 86400)
-      ~T[17:10:05.000000]
-      iex> Time.add(~T[23:00:00], -60)
-      ~T[22:59:00.000000]
-
-  """
-  @doc since: "1.6.0"
-  @spec add(Calendar.time(), integer, System.time_unit()) :: t
-  def add(%{calendar: calendar} = time, number, unit \\ :second) when is_integer(number) do
-    number = System.convert_time_unit(number, unit, :microsecond)
-    total = time_to_microseconds(time) + number
-    parts = Integer.mod(total, @parts_per_day)
-    {hour, minute, second, microsecond} = calendar.time_from_day_fraction({parts, @parts_per_day})
-
-    %Time{
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond,
-      calendar: calendar
-    }
-  end
-
-  defp time_to_microseconds(%{
-         calendar: Calendar.ISO,
-         hour: 0,
-         minute: 0,
-         second: 0,
-         microsecond: {0, _}
-       }) do
-    0
-  end
-
-  defp time_to_microseconds(time) do
-    iso_days = {0, to_day_fraction(time)}
-    Calendar.ISO.iso_days_to_unit(iso_days, :microsecond)
-  end
-
-  @doc """
-  Compares two time structs.
-
-  Returns `:gt` if first time is later than the second
-  and `:lt` for vice versa. If the two times are equal
-  `:eq` is returned.
-
-  ## Examples
-
-      iex> Time.compare(~T[16:04:16], ~T[16:04:28])
-      :lt
-      iex> Time.compare(~T[16:04:16], ~T[16:04:16])
-      :eq
-      iex> Time.compare(~T[16:04:16.01], ~T[16:04:16.001])
-      :gt
-
-  This function can also be used to compare across more
-  complex calendar types by considering only the time fields:
-
-      iex> Time.compare(~N[1900-01-01 16:04:16], ~N[2015-01-01 16:04:16])
-      :eq
-      iex> Time.compare(~N[2015-01-01 16:04:16], ~N[2015-01-01 16:04:28])
-      :lt
-      iex> Time.compare(~N[2015-01-01 16:04:16.01], ~N[2000-01-01 16:04:16.001])
-      :gt
-
-  """
-  @doc since: "1.4.0"
-  @spec compare(Calendar.time(), Calendar.time()) :: :lt | :eq | :gt
-  def compare(%{calendar: calendar} = time1, %{calendar: calendar} = time2) do
-    %{hour: hour1, minute: minute1, second: second1, microsecond: {microsecond1, _}} = time1
-    %{hour: hour2, minute: minute2, second: second2, microsecond: {microsecond2, _}} = time2
-
-    case {{hour1, minute1, second1, microsecond1}, {hour2, minute2, second2, microsecond2}} do
-      {first, second} when first > second -> :gt
-      {first, second} when first < second -> :lt
-      _ -> :eq
-    end
-  end
-
-  def compare(time1, time2) do
-    {parts1, ppd1} = to_day_fraction(time1)
-    {parts2, ppd2} = to_day_fraction(time2)
-
-    case {parts1 * ppd2, parts2 * ppd1} do
-      {first, second} when first > second -> :gt
-      {first, second} when first < second -> :lt
-      _ -> :eq
-    end
-  end
-
-  @doc """
-  Converts given `time` to a different calendar.
-
-  Returns `{:ok, time}` if the conversion was successful,
-  or `{:error, reason}` if it was not, for some reason.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> Time.convert(~T[13:30:15], Calendar.Holocene)
-      {:ok, %Time{calendar: Calendar.Holocene, hour: 13, minute: 30, second: 15, microsecond: {0, 0}}}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert(Calendar.time(), Calendar.calendar()) :: {:ok, t} | {:error, atom}
-
-  # Keep it multiline for proper function clause errors.
-  def convert(
-        %{
-          calendar: calendar,
-          hour: hour,
-          minute: minute,
-          second: second,
-          microsecond: microsecond
-        },
-        calendar
-      ) do
-    time = %Time{
-      calendar: calendar,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: microsecond
-    }
-
-    {:ok, time}
-  end
-
-  def convert(%{microsecond: {_, precision}} = time, calendar) do
-    {hour, minute, second, {microsecond, _}} =
-      time
-      |> to_day_fraction()
-      |> calendar.time_from_day_fraction()
-
-    time = %Time{
-      calendar: calendar,
-      hour: hour,
-      minute: minute,
-      second: second,
-      microsecond: {microsecond, precision}
-    }
-
-    {:ok, time}
-  end
-
-  @doc """
-  Similar to `Time.convert/2`, but raises an `ArgumentError`
-  if the conversion between the two calendars is not possible.
-
-  ## Examples
-
-  Imagine someone implements `Calendar.Holocene`, a calendar based on the
-  Gregorian calendar that adds exactly 10,000 years to the current Gregorian
-  year:
-
-      iex> Time.convert!(~T[13:30:15], Calendar.Holocene)
-      %Time{calendar: Calendar.Holocene, hour: 13, minute: 30, second: 15, microsecond: {0, 0}}
-
-  """
-  @doc since: "1.5.0"
-  @spec convert!(Calendar.time(), Calendar.calendar()) :: t
-  def convert!(time, calendar) do
-    case convert(time, calendar) do
-      {:ok, value} ->
-        value
-
-      {:error, reason} ->
-        raise ArgumentError,
-              "cannot convert #{inspect(time)} to target calendar #{inspect(calendar)}, " <>
-                "reason: #{inspect(reason)}"
-    end
-  end
-
-  @doc """
-  Returns the difference between two times, considering only the hour, minute,
-  second and microsecond.
-
-  As with the `compare/2` function both `Time` structs and other structures
-  containing time can be used. If for instance a `NaiveDateTime` or `DateTime`
-  is passed, only the hour, month, second, and microsecond is considered. Any
-  additional information about a date or time zone is ignored when calculating
-  the difference.
-
-  The answer can be returned in any `unit` available from
-  `t:System.time_unit/0`. If the first unit is smaller than
-  the second, a negative number is returned.
-
-  This function returns the difference in seconds where seconds
-  are measured according to `Calendar.ISO`.
-
-  ## Examples
-
-      iex> Time.diff(~T[00:29:12], ~T[00:29:10])
-      2
-
-      # When passing a `NaiveDateTime` the date part is ignored.
-      iex> Time.diff(~N[2017-01-01 00:29:12], ~T[00:29:10])
-      2
-
-      # Two `NaiveDateTime` structs could have big differences in the date
-      # but only the time part is considered.
-      iex> Time.diff(~N[2017-01-01 00:29:12], ~N[1900-02-03 00:29:10])
-      2
-
-      iex> Time.diff(~T[00:29:12], ~T[00:29:10], :microsecond)
-      2_000_000
-      iex> Time.diff(~T[00:29:10], ~T[00:29:12], :microsecond)
-      -2_000_000
-
-  """
-  @doc since: "1.5.0"
-  @spec diff(Calendar.time(), Calendar.time(), System.time_unit()) :: integer
-  def diff(time1, time2, unit \\ :second)
-
-  def diff(
-        %{
-          calendar: Calendar.ISO,
-          hour: hour1,
-          minute: minute1,
-          second: second1,
-          microsecond: {microsecond1, @parts_per_day}
-        },
-        %{
-          calendar: Calendar.ISO,
-          hour: hour2,
-          minute: minute2,
-          second: second2,
-          microsecond: {microsecond2, @parts_per_day}
-        },
-        unit
-      ) do
-    total =
-      (hour1 - hour2) * 3_600_000_000 + (minute1 - minute2) * 60_000_000 +
-        (second1 - second2) * 1_000_000 + (microsecond1 - microsecond2)
-
-    System.convert_time_unit(total, :microsecond, unit)
-  end
-
-  def diff(time1, time2, unit) do
-    fraction1 = to_day_fraction(time1)
-    fraction2 = to_day_fraction(time2)
-
-    Calendar.ISO.iso_days_to_unit({0, fraction1}, unit) -
-      Calendar.ISO.iso_days_to_unit({0, fraction2}, unit)
-  end
-
-  @doc """
-  Returns the given time with the microsecond field truncated to the given
-  precision (`:microsecond`, `millisecond` or `:second`).
-
-  The given time is returned unchanged if it already has lower precision than
-  the given precision.
-
-  ## Examples
-
-      iex> Time.truncate(~T[01:01:01.123456], :microsecond)
-      ~T[01:01:01.123456]
-
-      iex> Time.truncate(~T[01:01:01.123456], :millisecond)
-      ~T[01:01:01.123]
-
-      iex> Time.truncate(~T[01:01:01.123456], :second)
-      ~T[01:01:01]
-
-  """
-  @doc since: "1.6.0"
-  @spec truncate(t(), :microsecond | :millisecond | :second) :: t()
-  def truncate(%Time{microsecond: microsecond} = time, precision) do
-    %{time | microsecond: Calendar.truncate(microsecond, precision)}
-  end
-
-  ## Helpers
-
-  defp to_day_fraction(%{
-         hour: hour,
-         minute: minute,
-         second: second,
-         microsecond: {_, _} = microsecond,
-         calendar: calendar
-       }) do
-    calendar.time_to_day_fraction(hour, minute, second, microsecond)
-  end
-
-  defimpl String.Chars do
-    def to_string(time) do
-      %{
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond,
-        calendar: calendar
-      } = time
-
-      calendar.time_to_string(hour, minute, second, microsecond)
-    end
-  end
-
-  defimpl Inspect do
-    def inspect(%{calendar: Calendar.ISO} = time, _) do
-      %{
-        hour: hour,
-        minute: minute,
-        second: second,
-        microsecond: microsecond,
-        calendar: Calendar.ISO
-      } = time
-
-      "~T[" <> Calendar.ISO.time_to_string(hour, minute, second, microsecond) <> "]"
-    end
-
-    def inspect(time, opts) do
-      Inspect.Any.inspect(time, opts)
-    end
-  end
-end

lib/elixir/lib/calendar/time_zone_database.ex

@@ -1,96 +0,0 @@
-defmodule Calendar.TimeZoneDatabase do
-  @moduledoc """
-  This module defines a behaviour for providing time zone data.
-
-  IANA provides time zone data that includes data about different
-  UTC offsets and standard offsets for time zones.
-  """
-
-  @typedoc """
-  A period where a certain combination of UTC offset, standard offset and zone
-  abbreviation is in effect.
-
-  For instance one period could be the summer of 2018 in "Europe/London" where summer time /
-  daylight saving time is in effect and lasts from spring to autumn. At autumn the `std_offset`
-  changes along with the `zone_abbr` so a different period is needed during winter.
-  """
-  @type time_zone_period :: %{
-          optional(any) => any,
-          utc_offset: Calendar.utc_offset(),
-          std_offset: Calendar.std_offset(),
-          zone_abbr: Calendar.zone_abbr()
-        }
-
-  @typedoc """
-  Limit for when a certain time zone period begins or ends.
-
-  A beginning is inclusive. An ending is exclusive. Eg. if a period is from
-  2015-03-29 01:00:00 and until 2015-10-25 01:00:00, the period includes and
-  begins from the begining of 2015-03-29 01:00:00 and lasts until just before
-  2015-10-25 01:00:00.
-
-  A beginning or end for certain periods are infinite. For instance the latest
-  period for time zones without DST or plans to change. However for the purpose
-  of this behaviour they are only used for gaps in wall time where the needed
-  period limits are at a certain time.
-  """
-  @type time_zone_period_limit :: Calendar.naive_datetime()
-
-  @doc """
-  Time zone period for a point in time in UTC for a specific time zone.
-
-  Takes a time zone name and a point in time for UTC and returns a
-  `time_zone_period` for that point in time.
-  """
-  @doc since: "1.8.0"
-  @callback time_zone_period_from_utc_iso_days(Calendar.iso_days(), Calendar.time_zone()) ::
-              {:ok, time_zone_period}
-              | {:error, :time_zone_not_found | :utc_only_time_zone_database}
-
-  @doc """
-  Possible time zone periods for a certain time zone and wall clock date and time.
-
-  When the provided `datetime` is ambiguous a tuple with `:ambiguous` and two possible
-  periods. The periods in the list are sorted with the first element being the one that begins first.
-
-  When the provided `datetime` is in a gap - for instance during the "spring forward" when going
-  from winter time to summer time, a tuple with `:gap` and two periods with limits are returned
-  in a nested tuple. The first nested two-tuple is the period before the gap and a naive datetime
-  with a limit for when the period ends (wall time). The second nested two-tuple is the period
-  just after the gap and a datetime (wall time) for when the period begins just after the gap.
-
-  If there is only a single possible period for the provided `datetime`, the a tuple with `:single`
-  and the `time_zone_period` is returned.
-  """
-  @doc since: "1.8.0"
-  @callback time_zone_periods_from_wall_datetime(Calendar.naive_datetime(), Calendar.time_zone()) ::
-              {:ok, time_zone_period}
-              | {:ambiguous, time_zone_period, time_zone_period}
-              | {:gap, {time_zone_period, time_zone_period_limit},
-                 {time_zone_period, time_zone_period_limit}}
-              | {:error, :time_zone_not_found | :utc_only_time_zone_database}
-end
-
-defmodule Calendar.UTCOnlyTimeZoneDatabase do
-  @moduledoc """
-  Built-in time zone database that works only in Etc/UTC.
-
-  For all other time zones, it returns `{:error, :utc_only_time_zone_database}`.
-  """
-
-  @behaviour Calendar.TimeZoneDatabase
-
-  @impl true
-  def time_zone_period_from_utc_iso_days(_, "Etc/UTC"),
-    do: {:ok, %{std_offset: 0, utc_offset: 0, zone_abbr: "UTC"}}
-
-  def time_zone_period_from_utc_iso_days(_, _),
-    do: {:error, :utc_only_time_zone_database}
-
-  @impl true
-  def time_zone_periods_from_wall_datetime(_, "Etc/UTC"),
-    do: {:ok, %{std_offset: 0, utc_offset: 0, zone_abbr: "UTC"}}
-
-  def time_zone_periods_from_wall_datetime(_, _),
-    do: {:error, :utc_only_time_zone_database}
-end

lib/elixir/lib/code/identifier.ex

@@ -1,281 +0,0 @@
-defmodule Code.Identifier do
-  @moduledoc false
-
-  @doc """
-  Checks if the given identifier is an unary op.
-
-  ## Examples
-
-      iex> Code.Identifier.unary_op(:+)
-      {:non_associative, 300}
-
-  """
-  @spec unary_op(atom) :: {:non_associative, precedence :: pos_integer} | :error
-  def unary_op(op) do
-    cond do
-      op in [:&] -> {:non_associative, 90}
-      op in [:!, :^, :not, :+, :-, :~~~] -> {:non_associative, 300}
-      op in [:@] -> {:non_associative, 320}
-      true -> :error
-    end
-  end
-
-  @doc """
-  Checks if the given identifier is a binary op.
-
-  ## Examples
-
-      iex> Code.Identifier.binary_op(:+)
-      {:left, 210}
-
-  """
-  @spec binary_op(atom) :: {:left | :right, precedence :: pos_integer} | :error
-  def binary_op(op) do
-    cond do
-      op in [:<-, :\\] -> {:left, 40}
-      op in [:when] -> {:right, 50}
-      op in [:::] -> {:right, 60}
-      op in [:|] -> {:right, 70}
-      op in [:=] -> {:right, 100}
-      op in [:||, :|||, :or] -> {:left, 130}
-      op in [:&&, :&&&, :and] -> {:left, 140}
-      op in [:==, :!=, :=~, :===, :!==] -> {:left, 150}
-      op in [:<, :<=, :>=, :>] -> {:left, 160}
-      op in [:|>, :<<<, :>>>, :<~, :~>, :<<~, :~>>, :<~>, :<|>] -> {:left, 170}
-      op in [:in] -> {:left, 180}
-      op in [:^^^] -> {:left, 190}
-      op in [:++, :--, :.., :<>] -> {:right, 200}
-      op in [:+, :-] -> {:left, 210}
-      op in [:*, :/] -> {:left, 220}
-      op in [:.] -> {:left, 310}
-      true -> :error
-    end
-  end
-
-  @doc """
-  Classifies the given atom into one of the following categories:
-
-    * `:alias` - a valid Elixir alias, like `Foo`, `Foo.Bar` and so on
-
-    * `:callable_local` - an atom that can be used as a local call;
-      this category includes identifiers like `:foo`
-
-    * `:callable_operators` - all callable operators, such as `:<>`. Note
-      operators such as `:..` are not callable because of ambiguity
-
-    * `:not_callable` - an atom that cannot be used as a function call after the
-      `.` operator (for example, `:<<>>` is not callable because `Foo.<<>>` is a
-      syntax error); this category includes atoms like `:Foo`, since they are
-      valid identifiers but they need quotes to be used in function calls
-      (`Foo."Bar"`)
-
-    * `:other` - any other atom (these are usually escaped when inspected, like
-      `:"foo and bar"`)
-
-  """
-  def classify(atom) when is_atom(atom) do
-    charlist = Atom.to_charlist(atom)
-
-    cond do
-      atom in [:%, :%{}, :{}, :<<>>, :..., :.., :., :->] ->
-        :not_callable
-
-      unary_op(atom) != :error or binary_op(atom) != :error ->
-        :callable_operator
-
-      valid_alias?(charlist) ->
-        :alias
-
-      true ->
-        case :elixir_config.get(:identifier_tokenizer, String.Tokenizer).tokenize(charlist) do
-          {kind, _acc, [], _, _, special} ->
-            if kind == :identifier and not :lists.member(?@, special) do
-              :callable_local
-            else
-              :not_callable
-            end
-
-          _ ->
-            :other
-        end
-    end
-  end
-
-  defp valid_alias?('Elixir' ++ rest), do: valid_alias_piece?(rest)
-  defp valid_alias?(_other), do: false
-
-  defp valid_alias_piece?([?., char | rest]) when char >= ?A and char <= ?Z,
-    do: valid_alias_piece?(trim_leading_while_valid_identifier(rest))
-
-  defp valid_alias_piece?([]), do: true
-  defp valid_alias_piece?(_other), do: false
-
-  defp trim_leading_while_valid_identifier([char | rest])
-       when char >= ?a and char <= ?z
-       when char >= ?A and char <= ?Z
-       when char >= ?0 and char <= ?9
-       when char == ?_ do
-    trim_leading_while_valid_identifier(rest)
-  end
-
-  defp trim_leading_while_valid_identifier(other) do
-    other
-  end
-
-  @doc """
-  Inspects the identifier as an atom.
-  """
-  def inspect_as_atom(atom) when is_nil(atom) or is_boolean(atom) do
-    Atom.to_string(atom)
-  end
-
-  def inspect_as_atom(atom) when is_atom(atom) do
-    binary = Atom.to_string(atom)
-
-    case classify(atom) do
-      :alias ->
-        case binary do
-          binary when binary in ["Elixir", "Elixir.Elixir"] -> binary
-          "Elixir.Elixir." <> _rest -> binary
-          "Elixir." <> rest -> rest
-        end
-
-      type when type in [:callable_local, :callable_operator, :not_callable] ->
-        ":" <> binary
-
-      :other ->
-        {escaped, _} = escape(binary, ?")
-        IO.iodata_to_binary([?:, ?", escaped, ?"])
-    end
-  end
-
-  @doc """
-  Inspects the given identifier as a key.
-  """
-  def inspect_as_key(atom) when is_atom(atom) do
-    binary = Atom.to_string(atom)
-
-    case classify(atom) do
-      type when type in [:callable_local, :callable_operator, :not_callable] ->
-        IO.iodata_to_binary([binary, ?:])
-
-      _ ->
-        {escaped, _} = escape(binary, ?")
-        IO.iodata_to_binary([?", escaped, ?", ?:])
-    end
-  end
-
-  @doc """
-  Inspects the given identifier as a function name.
-  """
-  def inspect_as_function(atom) when is_atom(atom) do
-    binary = Atom.to_string(atom)
-
-    case classify(atom) do
-      type when type in [:callable_local, :callable_operator] ->
-        binary
-
-      type ->
-        escaped =
-          if type in [:not_callable, :alias] do
-            binary
-          else
-            elem(escape(binary, ?"), 0)
-          end
-
-        IO.iodata_to_binary([?", escaped, ?"])
-    end
-  end
-
-  @doc """
-  Extracts the name and arity of the parent from the anonymous function identifier.
-  """
-  # Example of this format: -NAME/ARITY-fun-COUNT-
-  def extract_anonymous_fun_parent(atom) when is_atom(atom) do
-    with "-" <> rest <- Atom.to_string(atom),
-         [trailing | reversed] = rest |> String.split("/") |> Enum.reverse(),
-         [arity, _inner, _count, ""] <- String.split(trailing, "-") do
-      {reversed |> Enum.reverse() |> Enum.join("/") |> String.to_atom(), arity}
-    else
-      _ -> :error
-    end
-  end
-
-  @doc """
-  Escapes the given identifier.
-  """
-  def escape(other, char, count \\ :infinity, fun \\ &escape_map/1) do
-    escape(other, char, count, [], fun)
-  end
-
-  defp escape(<<_, _::binary>> = binary, _char, 0, acc, _fun) do
-    {acc, binary}
-  end
-
-  defp escape(<<char, t::binary>>, char, count, acc, fun) do
-    escape(t, char, decrement(count), [acc | [?\\, char]], fun)
-  end
-
-  defp escape(<<?#, ?{, t::binary>>, char, count, acc, fun) do
-    escape(t, char, decrement(count), [acc | '\\\#{'], fun)
-  end
-
-  defp escape(<<h::utf8, t::binary>>, char, count, acc, fun) do
-    escaped = if value = fun.(h), do: value, else: escape_char(h)
-    escape(t, char, decrement(count), [acc | escaped], fun)
-  end
-
-  defp escape(<<a::4, b::4, t::binary>>, char, count, acc, fun) do
-    escape(t, char, decrement(count), [acc | ['\\x', to_hex(a), to_hex(b)]], fun)
-  end
-
-  defp escape(<<>>, _char, _count, acc, _fun) do
-    {acc, <<>>}
-  end
-
-  defp escape_char(0), do: '\\0'
-
-  defp escape_char(65279), do: '\\uFEFF'
-
-  defp escape_char(char)
-       when char in 0x20..0x7E
-       when char in 0xA0..0xD7FF
-       when char in 0xE000..0xFFFD
-       when char in 0x10000..0x10FFFF do
-    <<char::utf8>>
-  end
-
-  defp escape_char(char) when char < 0x100 do
-    <<a::4, b::4>> = <<char::8>>
-    ['\\x', to_hex(a), to_hex(b)]
-  end
-
-  defp escape_char(char) when char < 0x10000 do
-    <<a::4, b::4, c::4, d::4>> = <<char::16>>
-    ['\\x{', to_hex(a), to_hex(b), to_hex(c), to_hex(d), ?}]
-  end
-
-  defp escape_char(char) when char < 0x1000000 do
-    <<a::4, b::4, c::4, d::4, e::4, f::4>> = <<char::24>>
-    ['\\x{', to_hex(a), to_hex(b), to_hex(c), to_hex(d), to_hex(e), to_hex(f), ?}]
-  end
-
-  defp escape_map(?\a), do: '\\a'
-  defp escape_map(?\b), do: '\\b'
-  defp escape_map(?\d), do: '\\d'
-  defp escape_map(?\e), do: '\\e'
-  defp escape_map(?\f), do: '\\f'
-  defp escape_map(?\n), do: '\\n'
-  defp escape_map(?\r), do: '\\r'
-  defp escape_map(?\t), do: '\\t'
-  defp escape_map(?\v), do: '\\v'
-  defp escape_map(?\\), do: '\\\\'
-  defp escape_map(_), do: false
-
-  @compile {:inline, to_hex: 1, decrement: 1}
-  defp to_hex(c) when c in 0..9, do: ?0 + c
-  defp to_hex(c) when c in 10..15, do: ?A + c - 10
-
-  defp decrement(:infinity), do: :infinity
-  defp decrement(counter), do: counter - 1
-end

lib/elixir/lib/code/typespec.ex

@@ -1,416 +0,0 @@
-defmodule Code.Typespec do
-  @moduledoc false
-
-  @doc """
-  Converts a spec clause back to Elixir quoted expression.
-  """
-  @spec spec_to_quoted(atom, tuple) :: {atom, keyword, [Macro.t()]}
-  def spec_to_quoted(name, spec)
-
-  def spec_to_quoted(name, {:type, line, :fun, [{:type, _, :product, args}, result]})
-      when is_atom(name) do
-    meta = [line: line]
-    body = {name, meta, Enum.map(args, &typespec_to_quoted/1)}
-
-    vars =
-      for type_expr <- args ++ [result],
-          var <- collect_vars(type_expr),
-          uniq: true,
-          do: {var, {:var, meta, nil}}
-
-    spec = {:::, meta, [body, typespec_to_quoted(result)]}
-
-    if vars == [] do
-      spec
-    else
-      {:when, meta, [spec, vars]}
-    end
-  end
-
-  def spec_to_quoted(name, {:type, line, :fun, []}) when is_atom(name) do
-    {:::, [line: line], [{name, [line: line], []}, quote(do: term)]}
-  end
-
-  def spec_to_quoted(name, {:type, line, :bounded_fun, [type, constrs]}) when is_atom(name) do
-    {:type, _, :fun, [{:type, _, :product, args}, result]} = type
-
-    guards =
-      for {:type, _, :constraint, [{:atom, _, :is_subtype}, [{:var, _, var}, type]]} <- constrs do
-        {erl_to_ex_var(var), typespec_to_quoted(type)}
-      end
-
-    meta = [line: line]
-    ignore_vars = Keyword.keys(guards)
-
-    vars =
-      for type_expr <- args ++ [result],
-          var <- collect_vars(type_expr),
-          var not in ignore_vars,
-          uniq: true,
-          do: {var, {:var, meta, nil}}
-
-    args = for arg <- args, do: typespec_to_quoted(arg)
-
-    when_args = [
-      {:::, meta, [{name, [line: line], args}, typespec_to_quoted(result)]},
-      guards ++ vars
-    ]
-
-    {:when, meta, when_args}
-  end
-
-  @doc """
-  Converts a type clause back to Elixir AST.
-  """
-  def type_to_quoted(type)
-
-  def type_to_quoted({{:record, record}, fields, args}) when is_atom(record) do
-    fields = for field <- fields, do: typespec_to_quoted(field)
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    type = {:{}, [], [record | fields]}
-    quote(do: unquote(record)(unquote_splicing(args)) :: unquote(type))
-  end
-
-  def type_to_quoted({name, type, args}) when is_atom(name) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    quote(do: unquote(name)(unquote_splicing(args)) :: unquote(typespec_to_quoted(type)))
-  end
-
-  @doc """
-  Returns all types available from the module's BEAM code.
-
-  The result is returned as a list of tuples where the first
-  element is the type (`:typep`, `:type` and `:opaque`).
-
-  The module must have a corresponding BEAM file which can be
-  located by the runtime system. The types will be in the Erlang
-  Abstract Format.
-  """
-  @spec fetch_types(module | binary) :: {:ok, [tuple]} | :error
-  def fetch_types(module) when is_atom(module) or is_binary(module) do
-    case typespecs_abstract_code(module) do
-      {:ok, abstract_code} ->
-        exported_types = for {:attribute, _, :export_type, types} <- abstract_code, do: types
-        exported_types = List.flatten(exported_types)
-
-        types =
-          for {:attribute, _, kind, {name, _, args} = type} <- abstract_code,
-              kind in [:opaque, :type] do
-            cond do
-              kind == :opaque -> {:opaque, type}
-              {name, length(args)} in exported_types -> {:type, type}
-              true -> {:typep, type}
-            end
-          end
-
-        {:ok, types}
-
-      _ ->
-        :error
-    end
-  end
-
-  @doc """
-  Returns all specs available from the module's BEAM code.
-
-  The result is returned as a list of tuples where the first
-  element is spec name and arity and the second is the spec.
-
-  The module must have a corresponding BEAM file which can be
-  located by the runtime system. The types will be in the Erlang
-  Abstract Format.
-  """
-  @spec fetch_specs(module) :: {:ok, [tuple]} | :error
-  def fetch_specs(module) when is_atom(module) or is_binary(module) do
-    case typespecs_abstract_code(module) do
-      {:ok, abstract_code} ->
-        {:ok, for({:attribute, _, :spec, value} <- abstract_code, do: value)}
-
-      :error ->
-        :error
-    end
-  end
-
-  @doc """
-  Returns all callbacks available from the module's BEAM code.
-
-  The result is returned as a list of tuples where the first
-  element is spec name and arity and the second is the spec.
-
-  The module must have a corresponding BEAM file
-  which can be located by the runtime system. The types will be
-  in the Erlang Abstract Format.
-  """
-  @spec fetch_callbacks(module) :: {:ok, [tuple]} | :error
-  def fetch_callbacks(module) when is_atom(module) or is_binary(module) do
-    case typespecs_abstract_code(module) do
-      {:ok, abstract_code} ->
-        {:ok, for({:attribute, _, :callback, value} <- abstract_code, do: value)}
-
-      :error ->
-        :error
-    end
-  end
-
-  defp typespecs_abstract_code(module) do
-    with {module, binary} <- get_module_and_beam(module),
-         {:ok, {_, [debug_info: {:debug_info_v1, backend, data}]}} <-
-           :beam_lib.chunks(binary, [:debug_info]) do
-      case data do
-        {:elixir_v1, %{}, specs} ->
-          # Fast path to avoid translation to Erlang from Elixir.
-          {:ok, specs}
-
-        _ ->
-          case backend.debug_info(:erlang_v1, module, data, []) do
-            {:ok, abstract_code} -> {:ok, abstract_code}
-            _ -> :error
-          end
-      end
-    else
-      _ -> :error
-    end
-  end
-
-  defp get_module_and_beam(module) when is_atom(module) do
-    case :code.get_object_code(module) do
-      {^module, beam, _filename} -> {module, beam}
-      :error -> :error
-    end
-  end
-
-  defp get_module_and_beam(beam) when is_binary(beam) do
-    case :beam_lib.info(beam) do
-      [_ | _] = info -> {info[:module], beam}
-      _ -> :error
-    end
-  end
-
-  ## To AST conversion
-
-  defp collect_vars({:ann_type, _line, args}) when is_list(args) do
-    []
-  end
-
-  defp collect_vars({:type, _line, _kind, args}) when is_list(args) do
-    Enum.flat_map(args, &collect_vars/1)
-  end
-
-  defp collect_vars({:remote_type, _line, args}) when is_list(args) do
-    Enum.flat_map(args, &collect_vars/1)
-  end
-
-  defp collect_vars({:typed_record_field, _line, type}) do
-    collect_vars(type)
-  end
-
-  defp collect_vars({:paren_type, _line, [type]}) do
-    collect_vars(type)
-  end
-
-  defp collect_vars({:var, _line, var}) do
-    [erl_to_ex_var(var)]
-  end
-
-  defp collect_vars(_) do
-    []
-  end
-
-  defp typespec_to_quoted({:user_type, line, name, args}) do
-    typespec_to_quoted({:type, line, name, args})
-  end
-
-  defp typespec_to_quoted({:type, line, :tuple, :any}) do
-    {:tuple, [line: line], []}
-  end
-
-  defp typespec_to_quoted({:type, line, :tuple, args}) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    {:{}, [line: line], args}
-  end
-
-  defp typespec_to_quoted({:type, _line, :list, [{:type, _, :union, unions} = arg]}) do
-    case unpack_typespec_kw(unions, []) do
-      {:ok, ast} -> ast
-      :error -> [typespec_to_quoted(arg)]
-    end
-  end
-
-  defp typespec_to_quoted({:type, line, :list, []}) do
-    {:list, [line: line], []}
-  end
-
-  defp typespec_to_quoted({:type, _line, :list, [arg]}) do
-    [typespec_to_quoted(arg)]
-  end
-
-  defp typespec_to_quoted({:type, line, :nonempty_list, []}) do
-    [{:..., [line: line], nil}]
-  end
-
-  defp typespec_to_quoted({:type, line, :nonempty_list, [arg]}) do
-    [typespec_to_quoted(arg), {:..., [line: line], nil}]
-  end
-
-  defp typespec_to_quoted({:type, line, :map, :any}) do
-    {:map, [line: line], []}
-  end
-
-  defp typespec_to_quoted({:type, line, :map, fields}) do
-    fields =
-      Enum.map(fields, fn
-        {:type, _, :map_field_assoc, :any} ->
-          {{:optional, [], [{:any, [], []}]}, {:any, [], []}}
-
-        {:type, _, :map_field_exact, [{:atom, _, k}, v]} ->
-          {k, typespec_to_quoted(v)}
-
-        {:type, _, :map_field_exact, [k, v]} ->
-          {{:required, [], [typespec_to_quoted(k)]}, typespec_to_quoted(v)}
-
-        {:type, _, :map_field_assoc, [k, v]} ->
-          {{:optional, [], [typespec_to_quoted(k)]}, typespec_to_quoted(v)}
-      end)
-
-    {struct, fields} = Keyword.pop(fields, :__struct__)
-    map = {:%{}, [line: line], fields}
-
-    if struct do
-      {:%, [line: line], [struct, map]}
-    else
-      map
-    end
-  end
-
-  defp typespec_to_quoted({:type, line, :binary, [arg1, arg2]}) do
-    [arg1, arg2] = for arg <- [arg1, arg2], do: typespec_to_quoted(arg)
-
-    case {typespec_to_quoted(arg1), typespec_to_quoted(arg2)} do
-      {arg1, 0} ->
-        quote(line: line, do: <<_::unquote(arg1)>>)
-
-      {0, arg2} ->
-        quote(line: line, do: <<_::_*unquote(arg2)>>)
-
-      {arg1, arg2} ->
-        quote(line: line, do: <<_::unquote(arg1), _::_*unquote(arg2)>>)
-    end
-  end
-
-  defp typespec_to_quoted({:type, line, :union, args}) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    Enum.reduce(Enum.reverse(args), fn arg, expr -> {:|, [line: line], [arg, expr]} end)
-  end
-
-  defp typespec_to_quoted({:type, line, :fun, [{:type, _, :product, args}, result]}) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    [{:->, [line: line], [args, typespec_to_quoted(result)]}]
-  end
-
-  defp typespec_to_quoted({:type, line, :fun, [args, result]}) do
-    [{:->, [line: line], [[typespec_to_quoted(args)], typespec_to_quoted(result)]}]
-  end
-
-  defp typespec_to_quoted({:type, line, :fun, []}) do
-    typespec_to_quoted({:type, line, :fun, [{:type, line, :any}, {:type, line, :any, []}]})
-  end
-
-  defp typespec_to_quoted({:type, line, :range, [left, right]}) do
-    {:.., [line: line], [typespec_to_quoted(left), typespec_to_quoted(right)]}
-  end
-
-  defp typespec_to_quoted({:type, _line, nil, []}) do
-    []
-  end
-
-  defp typespec_to_quoted({:type, line, name, args}) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    {name, [line: line], args}
-  end
-
-  defp typespec_to_quoted({:var, line, var}) do
-    {erl_to_ex_var(var), line, nil}
-  end
-
-  defp typespec_to_quoted({:op, line, op, arg}) do
-    {op, [line: line], [typespec_to_quoted(arg)]}
-  end
-
-  defp typespec_to_quoted({:remote_type, line, [mod, name, args]}) do
-    remote_type(line, mod, name, args)
-  end
-
-  defp typespec_to_quoted({:ann_type, line, [var, type]}) do
-    {:::, [line: line], [typespec_to_quoted(var), typespec_to_quoted(type)]}
-  end
-
-  defp typespec_to_quoted(
-         {:typed_record_field, {:record_field, line, {:atom, line1, name}}, type}
-       ) do
-    typespec_to_quoted({:ann_type, line, [{:var, line1, name}, type]})
-  end
-
-  defp typespec_to_quoted({:type, _, :any}) do
-    quote(do: ...)
-  end
-
-  defp typespec_to_quoted({:paren_type, _, [type]}) do
-    typespec_to_quoted(type)
-  end
-
-  defp typespec_to_quoted({type, _line, atom}) when is_atom(type) do
-    atom
-  end
-
-  defp typespec_to_quoted(other), do: other
-
-  ## Helpers
-
-  defp remote_type(line, {:atom, _, :elixir}, {:atom, _, :charlist}, []) do
-    typespec_to_quoted({:type, line, :charlist, []})
-  end
-
-  defp remote_type(line, {:atom, _, :elixir}, {:atom, _, :nonempty_charlist}, []) do
-    typespec_to_quoted({:type, line, :nonempty_charlist, []})
-  end
-
-  defp remote_type(line, {:atom, _, :elixir}, {:atom, _, :struct}, []) do
-    typespec_to_quoted({:type, line, :struct, []})
-  end
-
-  defp remote_type(line, {:atom, _, :elixir}, {:atom, _, :as_boolean}, [arg]) do
-    typespec_to_quoted({:type, line, :as_boolean, [arg]})
-  end
-
-  defp remote_type(line, {:atom, _, :elixir}, {:atom, _, :keyword}, args) do
-    typespec_to_quoted({:type, line, :keyword, args})
-  end
-
-  defp remote_type(line, mod, name, args) do
-    args = for arg <- args, do: typespec_to_quoted(arg)
-    dot = {:., [line: line], [typespec_to_quoted(mod), typespec_to_quoted(name)]}
-    {dot, [line: line], args}
-  end
-
-  defp erl_to_ex_var(var) do
-    case Atom.to_string(var) do
-      <<"_", c::utf8, rest::binary>> ->
-        String.to_atom("_#{String.downcase(<<c::utf8>>)}#{rest}")
-
-      <<c::utf8, rest::binary>> ->
-        String.to_atom("#{String.downcase(<<c::utf8>>)}#{rest}")
-    end
-  end
-
-  defp unpack_typespec_kw([{:type, _, :tuple, [{:atom, _, atom}, type]} | t], acc) do
-    unpack_typespec_kw(t, [{atom, typespec_to_quoted(type)} | acc])
-  end
-
-  defp unpack_typespec_kw([], acc) do
-    {:ok, Enum.reverse(acc)}
-  end
-
-  defp unpack_typespec_kw(_, _acc) do
-    :error
-  end
-end

lib/elixir/lib/collectable.ex

@@ -1,153 +0,0 @@
-defprotocol Collectable do
-  @moduledoc """
-  A protocol to traverse data structures.
-
-  The `Enum.into/2` function uses this protocol to insert an
-  enumerable into a collection:
-
-      iex> Enum.into([a: 1, b: 2], %{})
-      %{a: 1, b: 2}
-
-  ## Why Collectable?
-
-  The `Enumerable` protocol is useful to take values out of a collection.
-  In order to support a wide range of values, the functions provided by
-  the `Enumerable` protocol do not keep shape. For example, passing a
-  map to `Enum.map/2` always returns a list.
-
-  This design is intentional. `Enumerable` was designed to support infinite
-  collections, resources and other structures with fixed shape. For example,
-  it doesn't make sense to insert values into a range, as it has a fixed
-  shape where just the range limits are stored.
-
-  The `Collectable` module was designed to fill the gap left by the
-  `Enumerable` protocol. `into/1` can be seen as the opposite of
-  `Enumerable.reduce/3`. If `Enumerable` is about taking values out,
-  `Collectable.into/1` is about collecting those values into a structure.
-
-  ## Examples
-
-  To show how to manually use the `Collectable` protocol, let's play with its
-  implementation for `MapSet`.
-
-      iex> {initial_acc, collector_fun} = Collectable.into(MapSet.new())
-      iex> updated_acc = Enum.reduce([1, 2, 3], initial_acc, fn elem, acc ->
-      ...>   collector_fun.(acc, {:cont, elem})
-      ...> end)
-      iex> collector_fun.(updated_acc, :done)
-      #MapSet<[1, 2, 3]>
-
-  To show how the protocol can be implemented, we can take again a look at the
-  implementation for `MapSet`. In this implementation "collecting" elements
-  simply means inserting them in the set through `MapSet.put/2`.
-
-      defimpl Collectable, for: MapSet do
-        def into(original) do
-          collector_fun = fn
-            set, {:cont, elem} -> MapSet.put(set, elem)
-            set, :done -> set
-            _set, :halt -> :ok
-          end
-
-          {original, collector_fun}
-        end
-      end
-
-  """
-
-  @type command :: {:cont, term} | :done | :halt
-
-  @doc """
-  Returns an initial accumulator and a "collector" function.
-
-  The returned function receives a term and a command and injects the term into
-  the collectable on every `{:cont, term}` command.
-
-  `:done` is passed as a command when no further values will be injected. This
-  is useful when there's a need to close resources or normalizing values. A
-  collectable must be returned when the command is `:done`.
-
-  If injection is suddenly interrupted, `:halt` is passed and the function
-  can return any value as it won't be used.
-
-  For examples on how to use the `Collectable` protocol and `into/1` see the
-  module documentation.
-  """
-  @spec into(t) :: {term, (term, command -> t | term)}
-  def into(collectable)
-end
-
-defimpl Collectable, for: List do
-  def into(original) do
-    if original != [] do
-      IO.warn(
-        "the Collectable protocol is deprecated for non-empty lists. The behaviour of " <>
-          "things like Enum.into/2 or \"for\" comprehensions with an :into option is incorrect " <>
-          "when collecting into non-empty lists. If you're collecting into a non-empty keyword " <>
-          "list, consider using Keyword.merge/2 instead. If you're collecting into a non-empty " <>
-          "list, consider concatenating the two lists with the ++ operator."
-      )
-    end
-
-    fun = fn
-      list, {:cont, x} -> [x | list]
-      list, :done -> original ++ :lists.reverse(list)
-      _, :halt -> :ok
-    end
-
-    {[], fun}
-  end
-end
-
-defimpl Collectable, for: BitString do
-  def into(original) when is_binary(original) do
-    fun = fn
-      acc, {:cont, x} when is_binary(x) and is_list(acc) ->
-        [acc | x]
-
-      acc, {:cont, x} when is_bitstring(x) and is_bitstring(acc) ->
-        <<acc::bitstring, x::bitstring>>
-
-      acc, {:cont, x} when is_bitstring(x) ->
-        <<IO.iodata_to_binary(acc)::bitstring, x::bitstring>>
-
-      acc, :done when is_bitstring(acc) ->
-        acc
-
-      acc, :done ->
-        IO.iodata_to_binary(acc)
-
-      _, :halt ->
-        :ok
-    end
-
-    {[original], fun}
-  end
-
-  def into(original) when is_bitstring(original) do
-    fun = fn
-      acc, {:cont, x} when is_bitstring(x) ->
-        <<acc::bitstring, x::bitstring>>
-
-      acc, :done ->
-        acc
-
-      _, :halt ->
-        :ok
-    end
-
-    {original, fun}
-  end
-end
-
-defimpl Collectable, for: Map do
-  def into(original) do
-    fun = fn
-      map, {:cont, {k, v}} -> :maps.put(k, v, map)
-      map, :done -> map
-      _, :halt -> :ok
-    end
-
-    {original, fun}
-  end
-end

lib/elixir/lib/dict.ex

@@ -1,442 +0,0 @@
-defmodule Dict do
-  @moduledoc ~S"""
-  Generic API for dictionaries.
-
-  If you need a general dictionary, use the `Map` module.
-  If you need to manipulate keyword lists, use `Keyword`.
-
-  To convert maps into keywords and vice-versa, use the
-  `new` function in the respective modules.
-  """
-
-  @moduledoc deprecated: "Use Map or Keyword modules instead"
-
-  @type key :: any
-  @type value :: any
-  @type t :: list | map
-
-  message =
-    "Use the Map module for working with maps or the Keyword module for working with keyword lists"
-
-  # TODO: Remove by 2.0
-
-  @deprecated message
-  defmacro __using__(_) do
-    # Use this import to guarantee proper code expansion
-    import Kernel, except: [size: 1]
-
-    quote do
-      message = "Use maps and the Map module instead"
-
-      @deprecated message
-      def get(dict, key, default \\ nil) do
-        case fetch(dict, key) do
-          {:ok, value} -> value
-          :error -> default
-        end
-      end
-
-      @deprecated message
-      def get_lazy(dict, key, fun) when is_function(fun, 0) do
-        case fetch(dict, key) do
-          {:ok, value} -> value
-          :error -> fun.()
-        end
-      end
-
-      @deprecated message
-      def get_and_update(dict, key, fun) do
-        current_value = get(dict, key)
-        {get, new_value} = fun.(current_value)
-        {get, put(dict, key, new_value)}
-      end
-
-      @deprecated message
-      def fetch!(dict, key) do
-        case fetch(dict, key) do
-          {:ok, value} -> value
-          :error -> raise KeyError, key: key, term: dict
-        end
-      end
-
-      @deprecated message
-      def has_key?(dict, key) do
-        match?({:ok, _}, fetch(dict, key))
-      end
-
-      @deprecated message
-      def put_new(dict, key, value) do
-        case has_key?(dict, key) do
-          true -> dict
-          false -> put(dict, key, value)
-        end
-      end
-
-      @deprecated message
-      def put_new_lazy(dict, key, fun) when is_function(fun, 0) do
-        case has_key?(dict, key) do
-          true -> dict
-          false -> put(dict, key, fun.())
-        end
-      end
-
-      @deprecated message
-      def drop(dict, keys) do
-        Enum.reduce(keys, dict, &delete(&2, &1))
-      end
-
-      @deprecated message
-      def take(dict, keys) do
-        Enum.reduce(keys, new(), fn key, acc ->
-          case fetch(dict, key) do
-            {:ok, value} -> put(acc, key, value)
-            :error -> acc
-          end
-        end)
-      end
-
-      @deprecated message
-      def to_list(dict) do
-        reduce(dict, {:cont, []}, fn kv, acc -> {:cont, [kv | acc]} end)
-        |> elem(1)
-        |> :lists.reverse()
-      end
-
-      @deprecated message
-      def keys(dict) do
-        reduce(dict, {:cont, []}, fn {k, _}, acc -> {:cont, [k | acc]} end)
-        |> elem(1)
-        |> :lists.reverse()
-      end
-
-      @deprecated message
-      def values(dict) do
-        reduce(dict, {:cont, []}, fn {_, v}, acc -> {:cont, [v | acc]} end)
-        |> elem(1)
-        |> :lists.reverse()
-      end
-
-      @deprecated message
-      def equal?(dict1, dict2) do
-        # Use this import to avoid conflicts in the user code
-        import Kernel, except: [size: 1]
-
-        case size(dict1) == size(dict2) do
-          false ->
-            false
-
-          true ->
-            reduce(dict1, {:cont, true}, fn {k, v}, _acc ->
-              case fetch(dict2, k) do
-                {:ok, ^v} -> {:cont, true}
-                _ -> {:halt, false}
-              end
-            end)
-            |> elem(1)
-        end
-      end
-
-      @deprecated message
-      def merge(dict1, dict2, fun \\ fn _k, _v1, v2 -> v2 end) do
-        # Use this import to avoid conflicts in the user code
-        import Kernel, except: [size: 1]
-
-        if size(dict1) < size(dict2) do
-          reduce(dict1, {:cont, dict2}, fn {k, v1}, acc ->
-            {:cont, update(acc, k, v1, &fun.(k, v1, &1))}
-          end)
-        else
-          reduce(dict2, {:cont, dict1}, fn {k, v2}, acc ->
-            {:cont, update(acc, k, v2, &fun.(k, &1, v2))}
-          end)
-        end
-        |> elem(1)
-      end
-
-      @deprecated message
-      def update(dict, key, initial, fun) do
-        case fetch(dict, key) do
-          {:ok, value} ->
-            put(dict, key, fun.(value))
-
-          :error ->
-            put(dict, key, initial)
-        end
-      end
-
-      @deprecated message
-      def update!(dict, key, fun) do
-        case fetch(dict, key) do
-          {:ok, value} ->
-            put(dict, key, fun.(value))
-
-          :error ->
-            raise KeyError, key: key, term: dict
-        end
-      end
-
-      @deprecated message
-      def pop(dict, key, default \\ nil) do
-        case fetch(dict, key) do
-          {:ok, value} ->
-            {value, delete(dict, key)}
-
-          :error ->
-            {default, dict}
-        end
-      end
-
-      @deprecated message
-      def pop_lazy(dict, key, fun) when is_function(fun, 0) do
-        case fetch(dict, key) do
-          {:ok, value} ->
-            {value, delete(dict, key)}
-
-          :error ->
-            {fun.(), dict}
-        end
-      end
-
-      @deprecated message
-      def split(dict, keys) do
-        Enum.reduce(keys, {new(), dict}, fn key, {inc, exc} = acc ->
-          case fetch(exc, key) do
-            {:ok, value} ->
-              {put(inc, key, value), delete(exc, key)}
-
-            :error ->
-              acc
-          end
-        end)
-      end
-
-      defoverridable merge: 2,
-                     merge: 3,
-                     equal?: 2,
-                     to_list: 1,
-                     keys: 1,
-                     values: 1,
-                     take: 2,
-                     drop: 2,
-                     get: 2,
-                     get: 3,
-                     fetch!: 2,
-                     has_key?: 2,
-                     put_new: 3,
-                     pop: 2,
-                     pop: 3,
-                     split: 2,
-                     update: 4,
-                     update!: 3,
-                     get_and_update: 3,
-                     get_lazy: 3,
-                     pop_lazy: 3,
-                     put_new_lazy: 3
-    end
-  end
-
-  defmacrop target(dict) do
-    quote do
-      case unquote(dict) do
-        %module{} -> module
-        %{} -> Map
-        dict when is_list(dict) -> Keyword
-        dict -> unsupported_dict(dict)
-      end
-    end
-  end
-
-  @deprecated message
-  @spec keys(t) :: [key]
-  def keys(dict) do
-    target(dict).keys(dict)
-  end
-
-  @deprecated message
-  @spec values(t) :: [value]
-  def values(dict) do
-    target(dict).values(dict)
-  end
-
-  @deprecated message
-  @spec size(t) :: non_neg_integer
-  def size(dict) do
-    target(dict).size(dict)
-  end
-
-  @deprecated message
-  @spec has_key?(t, key) :: boolean
-  def has_key?(dict, key) do
-    target(dict).has_key?(dict, key)
-  end
-
-  @deprecated message
-  @spec get(t, key, value) :: value
-  def get(dict, key, default \\ nil) do
-    target(dict).get(dict, key, default)
-  end
-
-  @deprecated message
-  @spec get_lazy(t, key, (() -> value)) :: value
-  def get_lazy(dict, key, fun) do
-    target(dict).get_lazy(dict, key, fun)
-  end
-
-  @deprecated message
-  @spec get_and_update(t, key, (value -> {value, value})) :: {value, t}
-  def get_and_update(dict, key, fun) do
-    target(dict).get_and_update(dict, key, fun)
-  end
-
-  @deprecated message
-  @spec fetch(t, key) :: value
-  def fetch(dict, key) do
-    target(dict).fetch(dict, key)
-  end
-
-  @deprecated message
-  @spec fetch!(t, key) :: value
-  def fetch!(dict, key) do
-    target(dict).fetch!(dict, key)
-  end
-
-  @deprecated message
-  @spec put(t, key, value) :: t
-  def put(dict, key, val) do
-    target(dict).put(dict, key, val)
-  end
-
-  @deprecated message
-  @spec put_new(t, key, value) :: t
-  def put_new(dict, key, val) do
-    target(dict).put_new(dict, key, val)
-  end
-
-  @deprecated message
-  @spec put_new_lazy(t, key, (() -> value)) :: t
-  def put_new_lazy(dict, key, fun) do
-    target(dict).put_new_lazy(dict, key, fun)
-  end
-
-  @deprecated message
-  @spec delete(t, key) :: t
-  def delete(dict, key) do
-    target(dict).delete(dict, key)
-  end
-
-  @deprecated message
-  @spec merge(t, t) :: t
-  def merge(dict1, dict2) do
-    target1 = target(dict1)
-    target2 = target(dict2)
-
-    if target1 == target2 do
-      target1.merge(dict1, dict2)
-    else
-      do_merge(target1, dict1, dict2, fn _k, _v1, v2 -> v2 end)
-    end
-  end
-
-  @deprecated message
-  @spec merge(t, t, (key, value, value -> value)) :: t
-  def merge(dict1, dict2, fun) do
-    target1 = target(dict1)
-    target2 = target(dict2)
-
-    if target1 == target2 do
-      target1.merge(dict1, dict2, fun)
-    else
-      do_merge(target1, dict1, dict2, fun)
-    end
-  end
-
-  defp do_merge(target1, dict1, dict2, fun) do
-    Enumerable.reduce(dict2, {:cont, dict1}, fn {k, v}, acc ->
-      {:cont, target1.update(acc, k, v, fn other -> fun.(k, other, v) end)}
-    end)
-    |> elem(1)
-  end
-
-  @deprecated message
-  @spec pop(t, key, value) :: {value, t}
-  def pop(dict, key, default \\ nil) do
-    target(dict).pop(dict, key, default)
-  end
-
-  @deprecated message
-  @spec pop_lazy(t, key, (() -> value)) :: {value, t}
-  def pop_lazy(dict, key, fun) do
-    target(dict).pop_lazy(dict, key, fun)
-  end
-
-  @deprecated message
-  @spec update!(t, key, (value -> value)) :: t
-  def update!(dict, key, fun) do
-    target(dict).update!(dict, key, fun)
-  end
-
-  @deprecated message
-  @spec update(t, key, value, (value -> value)) :: t
-  def update(dict, key, initial, fun) do
-    target(dict).update(dict, key, initial, fun)
-  end
-
-  @deprecated message
-  @spec split(t, [key]) :: {t, t}
-  def split(dict, keys) do
-    target(dict).split(dict, keys)
-  end
-
-  @deprecated message
-  @spec drop(t, [key]) :: t
-  def drop(dict, keys) do
-    target(dict).drop(dict, keys)
-  end
-
-  @deprecated message
-  @spec take(t, [key]) :: t
-  def take(dict, keys) do
-    target(dict).take(dict, keys)
-  end
-
-  @deprecated message
-  @spec empty(t) :: t
-  def empty(dict) do
-    target(dict).empty(dict)
-  end
-
-  @deprecated message
-  @spec equal?(t, t) :: boolean
-  def equal?(dict1, dict2) do
-    target1 = target(dict1)
-    target2 = target(dict2)
-
-    cond do
-      target1 == target2 ->
-        target1.equal?(dict1, dict2)
-
-      target1.size(dict1) == target2.size(dict2) ->
-        Enumerable.reduce(dict2, {:cont, true}, fn {k, v}, _acc ->
-          case target1.fetch(dict1, k) do
-            {:ok, ^v} -> {:cont, true}
-            _ -> {:halt, false}
-          end
-        end)
-        |> elem(1)
-
-      true ->
-        false
-    end
-  end
-
-  @deprecated message
-  @spec to_list(t) :: list
-  def to_list(dict) do
-    target(dict).to_list(dict)
-  end
-
-  @spec unsupported_dict(t) :: no_return
-  defp unsupported_dict(dict) do
-    raise ArgumentError, "unsupported dict: #{inspect(dict)}"
-  end
-end

lib/elixir/lib/file/stat.ex

@@ -1,93 +0,0 @@
-require Record
-
-defmodule File.Stat do
-  @moduledoc """
-  A struct that holds file information.
-
-  In Erlang, this struct is represented by a `:file_info` record.
-  Therefore this module also provides functions for converting
-  between the Erlang record and the Elixir struct.
-
-  Its fields are:
-
-    * `size` - size of file in bytes.
-
-    * `type` - `:device | :directory | :regular | :other | :symlink`; the type of the
-      file.
-
-    * `access` - `:read | :write | :read_write | :none`; the current system
-      access to the file.
-
-    * `atime` - the last time the file was read.
-
-    * `mtime` - the last time the file was written.
-
-    * `ctime` - the interpretation of this time field depends on the operating
-      system. On Unix, it is the last time the file or the inode was changed.
-      In Windows, it is the time of creation.
-
-    * `mode` - the file permissions.
-
-    * `links` - the number of links to this file. This is always 1 for file
-      systems which have no concept of links.
-
-    * `major_device` - identifies the file system where the file is located.
-      In Windows, the number indicates a drive as follows: 0 means A:, 1 means
-      B:, and so on.
-
-    * `minor_device` - only valid for character devices on Unix. In all other
-      cases, this field is zero.
-
-    * `inode` - gives the inode number. On non-Unix file systems, this field
-      will be zero.
-
-    * `uid` - indicates the owner of the file. Will be zero for non-Unix file
-      systems.
-
-    * `gid` - indicates the group that owns the file. Will be zero for
-      non-Unix file systems.
-
-  The time type returned in `atime`, `mtime`, and `ctime` is dependent on the
-  time type set in options. `{:time, type}` where type can be `:local`,
-  `:universal`, or `:posix`. Default is `:universal`.
-  """
-
-  record = Record.extract(:file_info, from_lib: "kernel/include/file.hrl")
-  keys = :lists.map(&elem(&1, 0), record)
-  vals = :lists.map(&{&1, [], nil}, keys)
-  pairs = :lists.zip(keys, vals)
-
-  defstruct keys
-
-  @type t :: %__MODULE__{
-          size: non_neg_integer(),
-          type: :device | :directory | :regular | :other | :symlink,
-          access: :read | :write | :read_write | :none,
-          atime: :calendar.datetime(),
-          mtime: :calendar.datetime(),
-          ctime: :calendar.datetime(),
-          mode: non_neg_integer(),
-          links: non_neg_integer(),
-          major_device: non_neg_integer(),
-          minor_device: non_neg_integer(),
-          inode: non_neg_integer(),
-          uid: non_neg_integer(),
-          gid: non_neg_integer()
-        }
-
-  @doc """
-  Converts a `File.Stat` struct to a `:file_info` record.
-  """
-  def to_record(%File.Stat{unquote_splicing(pairs)}) do
-    {:file_info, unquote_splicing(vals)}
-  end
-
-  @doc """
-  Converts a `:file_info` record into a `File.Stat`.
-  """
-  def from_record(file_info)
-
-  def from_record({:file_info, unquote_splicing(vals)}) do
-    %File.Stat{unquote_splicing(pairs)}
-  end
-end

lib/elixir/lib/file/stream.ex

@@ -1,190 +0,0 @@
-defmodule File.Stream do
-  @moduledoc """
-  Defines a `File.Stream` struct returned by `File.stream!/3`.
-
-  The following fields are public:
-
-    * `path`          - the file path
-    * `modes`         - the file modes
-    * `raw`           - a boolean indicating if bin functions should be used
-    * `line_or_bytes` - if reading should read lines or a given number of bytes
-
-  """
-
-  defstruct path: nil, modes: [], line_or_bytes: :line, raw: true
-
-  @type t :: %__MODULE__{}
-
-  @doc false
-  def __build__(path, modes, line_or_bytes) do
-    raw = :lists.keyfind(:encoding, 1, modes) == false
-
-    modes =
-      case raw do
-        true ->
-          case :lists.keyfind(:read_ahead, 1, modes) do
-            {:read_ahead, false} -> [:raw | :lists.keydelete(:read_ahead, 1, modes)]
-            {:read_ahead, _} -> [:raw | modes]
-            false -> [:raw, :read_ahead | modes]
-          end
-
-        false ->
-          modes
-      end
-
-    %File.Stream{path: path, modes: modes, raw: raw, line_or_bytes: line_or_bytes}
-  end
-
-  defimpl Collectable do
-    def into(%{path: path, modes: modes, raw: raw} = stream) do
-      modes = for mode <- modes, mode not in [:read], do: mode
-
-      case :file.open(path, [:write | modes]) do
-        {:ok, device} ->
-          {:ok, into(device, stream, raw)}
-
-        {:error, reason} ->
-          raise File.Error, reason: reason, action: "stream", path: path
-      end
-    end
-
-    defp into(device, stream, raw) do
-      fn
-        :ok, {:cont, x} ->
-          case raw do
-            true -> IO.binwrite(device, x)
-            false -> IO.write(device, x)
-          end
-
-        :ok, :done ->
-          # If delayed_write option is used and the last write failed will
-          # MatchError here as {:error, _} is returned.
-          :ok = :file.close(device)
-          stream
-
-        :ok, :halt ->
-          # If delayed_write option is used and the last write failed will
-          # MatchError here as {:error, _} is returned.
-          :ok = :file.close(device)
-      end
-    end
-  end
-
-  defimpl Enumerable do
-    @read_ahead_size 64 * 1024
-
-    def reduce(%{path: path, modes: modes, line_or_bytes: line_or_bytes, raw: raw}, acc, fun) do
-      start_fun = fn ->
-        case :file.open(path, read_modes(modes)) do
-          {:ok, device} ->
-            if :trim_bom in modes, do: trim_bom(device, raw) |> elem(0), else: device
-
-          {:error, reason} ->
-            raise File.Error, reason: reason, action: "stream", path: path
-        end
-      end
-
-      next_fun =
-        case raw do
-          true -> &IO.each_binstream(&1, line_or_bytes)
-          false -> &IO.each_stream(&1, line_or_bytes)
-        end
-
-      Stream.resource(start_fun, next_fun, &:file.close/1).(acc, fun)
-    end
-
-    def count(%{path: path, modes: modes, line_or_bytes: :line} = stream) do
-      pattern = :binary.compile_pattern("\n")
-      counter = &count_lines(&1, path, pattern, read_function(stream), 0)
-
-      case File.open(path, read_modes(modes), counter) do
-        {:ok, count} ->
-          {:ok, count}
-
-        {:error, reason} ->
-          raise File.Error, reason: reason, action: "stream", path: path
-      end
-    end
-
-    def count(%{path: path, line_or_bytes: bytes, raw: true, modes: modes}) do
-      case File.stat(path) do
-        {:ok, %{size: 0}} ->
-          {:error, __MODULE__}
-
-        {:ok, %{size: size}} ->
-          remainder = if rem(size, bytes) == 0, do: 0, else: 1
-          {:ok, div(size, bytes) + remainder - count_raw_bom(path, modes)}
-
-        {:error, reason} ->
-          raise File.Error, reason: reason, action: "stream", path: path
-      end
-    end
-
-    def count(_stream) do
-      {:error, __MODULE__}
-    end
-
-    def member?(_stream, _term) do
-      {:error, __MODULE__}
-    end
-
-    def slice(_stream) do
-      {:error, __MODULE__}
-    end
-
-    defp count_raw_bom(path, modes) do
-      if :trim_bom in modes do
-        File.open!(path, read_modes(modes), &(&1 |> trim_bom(true) |> elem(1)))
-      else
-        0
-      end
-    end
-
-    defp trim_bom(device, true) do
-      bom_length = device |> IO.binread(4) |> bom_length()
-      {:ok, new_pos} = :file.position(device, bom_length)
-      {device, new_pos}
-    end
-
-    defp trim_bom(device, false) do
-      # Or we read the bom in the correct amount or it isn't there
-      case bom_length(IO.read(device, 1)) do
-        0 ->
-          {:ok, _} = :file.position(device, 0)
-          {device, 0}
-
-        _ ->
-          {device, 1}
-      end
-    end
-
-    defp bom_length(<<239, 187, 191, _rest::binary>>), do: 3
-    defp bom_length(<<254, 255, _rest::binary>>), do: 2
-    defp bom_length(<<255, 254, _rest::binary>>), do: 2
-    defp bom_length(<<0, 0, 254, 255, _rest::binary>>), do: 4
-    defp bom_length(<<254, 255, 0, 0, _rest::binary>>), do: 4
-    defp bom_length(_binary), do: 0
-
-    defp read_modes(modes) do
-      for mode <- modes, mode not in [:write, :append, :trim_bom], do: mode
-    end
-
-    defp count_lines(device, path, pattern, read, count) do
-      case read.(device) do
-        data when is_binary(data) ->
-          count_lines(device, path, pattern, read, count + count_lines(data, pattern))
-
-        :eof ->
-          count
-
-        {:error, reason} ->
-          raise File.Error, reason: reason, action: "stream", path: path
-      end
-    end
-
-    defp count_lines(data, pattern), do: length(:binary.matches(data, pattern))
-
-    defp read_function(%{raw: true}), do: &IO.binread(&1, @read_ahead_size)
-    defp read_function(%{raw: false}), do: &IO.read(&1, @read_ahead_size)
-  end
-end

lib/elixir/lib/float.ex

@@ -1,524 +0,0 @@
-import Kernel, except: [round: 1]
-
-defmodule Float do
-  @moduledoc """
-  Functions for working with floating-point numbers.
-
-  ## Kernel functions
-
-  There are functions related to floating-point numbers on the `Kernel` module
-  too. Here is a list of them:
-
-    * `Kernel.round/1`: rounds a number to the nearest integer.
-    * `Kernel.trunc/1`: returns the integer part of a number.
-
-  ## Known issues
-
-  There are some very well known problems with floating-point numbers
-  and arithmetics due to the fact most decimal fractions cannot be
-  represented by a floating-point binary and most operations are not exact,
-  but operate on approximations. Those issues are not specific
-  to Elixir, they are a property of floating point representation itself.
-
-  For example, the numbers 0.1 and 0.01 are two of them, what means the result
-  of squaring 0.1 does not give 0.01 neither the closest representable. Here is
-  what happens in this case:
-
-    * The closest representable number to 0.1 is 0.1000000014
-    * The closest representable number to 0.01 is 0.0099999997
-    * Doing 0.1 * 0.1 should return 0.01, but because 0.1 is actually 0.1000000014,
-      the result is 0.010000000000000002, and because this is not the closest
-      representable number to 0.01, you'll get the wrong result for this operation
-
-  There are also other known problems like flooring or rounding numbers. See
-  `round/2` and `floor/2` for more details about them.
-
-  To learn more about floating-point arithmetic visit:
-
-    * [0.30000000000000004.com](http://0.30000000000000004.com/)
-    * [What Every Programmer Should Know About Floating-Point Arithmetic](http://floating-point-gui.de/)
-
-  """
-
-  import Bitwise
-
-  @power_of_2_to_52 4_503_599_627_370_496
-  @precision_range 0..15
-  @type precision_range :: 0..15
-
-  @doc """
-  Parses a binary into a float.
-
-  If successful, returns a tuple in the form of `{float, remainder_of_binary}`;
-  when the binary cannot be coerced into a valid float, the atom `:error` is
-  returned.
-
-  If the size of float exceeds the maximum size of `1.7976931348623157e+308`,
-  the `ArgumentError` exception is raised.
-
-  If you want to convert a string-formatted float directly to a float,
-  `String.to_float/1` can be used instead.
-
-  ## Examples
-
-      iex> Float.parse("34")
-      {34.0, ""}
-      iex> Float.parse("34.25")
-      {34.25, ""}
-      iex> Float.parse("56.5xyz")
-      {56.5, "xyz"}
-
-      iex> Float.parse("pi")
-      :error
-
-  """
-  @spec parse(binary) :: {float, binary} | :error
-  def parse("-" <> binary) do
-    case parse_unsigned(binary) do
-      :error -> :error
-      {number, remainder} -> {-number, remainder}
-    end
-  end
-
-  def parse("+" <> binary) do
-    parse_unsigned(binary)
-  end
-
-  def parse(binary) do
-    parse_unsigned(binary)
-  end
-
-  defp parse_unsigned(<<digit, rest::binary>>) when digit in ?0..?9,
-    do: parse_unsigned(rest, false, false, <<digit>>)
-
-  defp parse_unsigned(binary) when is_binary(binary), do: :error
-
-  defp parse_unsigned(<<digit, rest::binary>>, dot?, e?, acc) when digit in ?0..?9,
-    do: parse_unsigned(rest, dot?, e?, <<acc::binary, digit>>)
-
-  defp parse_unsigned(<<?., digit, rest::binary>>, false, false, acc) when digit in ?0..?9,
-    do: parse_unsigned(rest, true, false, <<acc::binary, ?., digit>>)
-
-  defp parse_unsigned(<<exp_marker, digit, rest::binary>>, dot?, false, acc)
-       when exp_marker in 'eE' and digit in ?0..?9,
-       do: parse_unsigned(rest, true, true, <<add_dot(acc, dot?)::binary, ?e, digit>>)
-
-  defp parse_unsigned(<<exp_marker, sign, digit, rest::binary>>, dot?, false, acc)
-       when exp_marker in 'eE' and sign in '-+' and digit in ?0..?9,
-       do: parse_unsigned(rest, true, true, <<add_dot(acc, dot?)::binary, ?e, sign, digit>>)
-
-  defp parse_unsigned(rest, dot?, _e?, acc),
-    do: {:erlang.binary_to_float(add_dot(acc, dot?)), rest}
-
-  defp add_dot(acc, true), do: acc
-  defp add_dot(acc, false), do: acc <> ".0"
-
-  @doc """
-  Rounds a float to the largest number less than or equal to `num`.
-
-  `floor/2` also accepts a precision to round a floating-point value down
-  to an arbitrary number of fractional digits (between 0 and 15).
-  The operation is performed on the binary floating point, without a
-  conversion to decimal.
-
-  This function always returns a float. `Kernel.trunc/1` may be used instead to
-  truncate the result to an integer afterwards.
-
-  ## Known issues
-
-  The behaviour of `floor/2` for floats can be surprising. For example:
-
-      iex> Float.floor(12.52, 2)
-      12.51
-
-  One may have expected it to floor to 12.52. This is not a bug.
-  Most decimal fractions cannot be represented as a binary floating point
-  and therefore the number above is internally represented as 12.51999999,
-  which explains the behaviour above.
-
-  ## Examples
-
-      iex> Float.floor(34.25)
-      34.0
-      iex> Float.floor(-56.5)
-      -57.0
-      iex> Float.floor(34.259, 2)
-      34.25
-
-  """
-  @spec floor(float, precision_range) :: float
-  def floor(number, precision \\ 0)
-
-  def floor(number, 0) when is_float(number) do
-    :math.floor(number)
-  end
-
-  def floor(number, precision) when is_float(number) and precision in @precision_range do
-    round(number, precision, :floor)
-  end
-
-  def floor(number, precision) when is_float(number) do
-    raise ArgumentError, invalid_precision_message(precision)
-  end
-
-  @doc """
-  Rounds a float to the smallest integer greater than or equal to `num`.
-
-  `ceil/2` also accepts a precision to round a floating-point value down
-  to an arbitrary number of fractional digits (between 0 and 15).
-
-  The operation is performed on the binary floating point, without a
-  conversion to decimal.
-
-  The behaviour of `ceil/2` for floats can be surprising. For example:
-
-      iex> Float.ceil(-12.52, 2)
-      -12.51
-
-  One may have expected it to ceil to -12.52. This is not a bug.
-  Most decimal fractions cannot be represented as a binary floating point
-  and therefore the number above is internally represented as -12.51999999,
-  which explains the behaviour above.
-
-  This function always returns floats. `Kernel.trunc/1` may be used instead to
-  truncate the result to an integer afterwards.
-
-  ## Examples
-
-      iex> Float.ceil(34.25)
-      35.0
-      iex> Float.ceil(-56.5)
-      -56.0
-      iex> Float.ceil(34.251, 2)
-      34.26
-
-  """
-  @spec ceil(float, precision_range) :: float
-  def ceil(number, precision \\ 0)
-
-  def ceil(number, 0) when is_float(number) do
-    :math.ceil(number)
-  end
-
-  def ceil(number, precision) when is_float(number) and precision in @precision_range do
-    round(number, precision, :ceil)
-  end
-
-  def ceil(number, precision) when is_float(number) do
-    raise ArgumentError, invalid_precision_message(precision)
-  end
-
-  @doc """
-  Rounds a floating-point value to an arbitrary number of fractional
-  digits (between 0 and 15).
-
-  The rounding direction always ties to half up. The operation is
-  performed on the binary floating point, without a conversion to decimal.
-
-  This function only accepts floats and always returns a float. Use
-  `Kernel.round/1` if you want a function that accepts both floats
-  and integers and always returns an integer.
-
-  ## Known issues
-
-  The behaviour of `round/2` for floats can be surprising. For example:
-
-      iex> Float.round(5.5675, 3)
-      5.567
-
-  One may have expected it to round to the half up 5.568. This is not a bug.
-  Most decimal fractions cannot be represented as a binary floating point
-  and therefore the number above is internally represented as 5.567499999,
-  which explains the behaviour above. If you want exact rounding for decimals,
-  you must use a decimal library. The behaviour above is also in accordance
-  to reference implementations, such as "Correctly Rounded Binary-Decimal and
-  Decimal-Binary Conversions" by David M. Gay.
-
-  ## Examples
-
-      iex> Float.round(12.5)
-      13.0
-      iex> Float.round(5.5674, 3)
-      5.567
-      iex> Float.round(5.5675, 3)
-      5.567
-      iex> Float.round(-5.5674, 3)
-      -5.567
-      iex> Float.round(-5.5675)
-      -6.0
-      iex> Float.round(12.341444444444441, 15)
-      12.341444444444441
-
-  """
-  @spec round(float, precision_range) :: float
-  # This implementation is slow since it relies on big integers.
-  # Faster implementations are available on more recent papers
-  # and could be implemented in the future.
-  def round(float, precision \\ 0)
-
-  def round(float, 0) when is_float(float) do
-    float |> :erlang.round() |> :erlang.float()
-  end
-
-  def round(float, precision) when is_float(float) and precision in @precision_range do
-    round(float, precision, :half_up)
-  end
-
-  def round(float, precision) when is_float(float) do
-    raise ArgumentError, invalid_precision_message(precision)
-  end
-
-  defp round(float, precision, rounding) do
-    <<sign::1, exp::11, significant::52-bitstring>> = <<float::float>>
-    {num, count, _} = decompose(significant, 1)
-    count = count - exp + 1023
-
-    cond do
-      # There is no decimal precision on subnormal floats
-      count <= 0 or exp == 0 ->
-        float
-
-      # Precision beyond 15 digits
-      count >= 104 ->
-        case rounding do
-          :ceil when sign === 0 -> 1 / power_of_10(precision)
-          :floor when sign === 1 -> -1 / power_of_10(precision)
-          _ -> 0.0
-        end
-
-      # We are asking more precision than we have
-      count <= precision ->
-        float
-
-      true ->
-        # Difference in precision between float and asked precision
-        # We subtract 1 because we need to calculate the remainder too
-        diff = count - precision - 1
-
-        # Get up to latest so we calculate the remainder
-        power_of_10 = power_of_10(diff)
-
-        # Convert the numerand to decimal base
-        num = num * power_of_5(count)
-
-        # Move to the given precision - 1
-        num = div(num, power_of_10)
-        div = div(num, 10)
-        num = rounding(rounding, sign, num, div)
-
-        # Convert back to float without loss
-        # http://www.exploringbinary.com/correct-decimal-to-floating-point-using-big-integers/
-        den = power_of_10(precision)
-        boundary = den <<< 52
-
-        cond do
-          num == 0 ->
-            0.0
-
-          num >= boundary ->
-            {den, exp} = scale_down(num, boundary, 52)
-            decimal_to_float(sign, num, den, exp)
-
-          true ->
-            {num, exp} = scale_up(num, boundary, 52)
-            decimal_to_float(sign, num, den, exp)
-        end
-    end
-  end
-
-  defp scale_up(num, boundary, exp) when num >= boundary, do: {num, exp}
-  defp scale_up(num, boundary, exp), do: scale_up(num <<< 1, boundary, exp - 1)
-
-  defp scale_down(num, den, exp) do
-    new_den = den <<< 1
-
-    if num < new_den do
-      {den >>> 52, exp}
-    else
-      scale_down(num, new_den, exp + 1)
-    end
-  end
-
-  defp decimal_to_float(sign, num, den, exp) do
-    quo = div(num, den)
-    rem = num - quo * den
-
-    tmp =
-      case den >>> 1 do
-        den when rem > den -> quo + 1
-        den when rem < den -> quo
-        _ when (quo &&& 1) === 1 -> quo + 1
-        _ -> quo
-      end
-
-    tmp = tmp - @power_of_2_to_52
-    <<tmp::float>> = <<sign::1, exp + 1023::11, tmp::52>>
-    tmp
-  end
-
-  defp rounding(:floor, 1, _num, div), do: div + 1
-  defp rounding(:ceil, 0, _num, div), do: div + 1
-
-  defp rounding(:half_up, _sign, num, div) do
-    case rem(num, 10) do
-      rem when rem < 5 -> div
-      rem when rem >= 5 -> div + 1
-    end
-  end
-
-  defp rounding(_, _, _, div), do: div
-
-  Enum.reduce(0..104, 1, fn x, acc ->
-    defp power_of_10(unquote(x)), do: unquote(acc)
-    acc * 10
-  end)
-
-  Enum.reduce(0..104, 1, fn x, acc ->
-    defp power_of_5(unquote(x)), do: unquote(acc)
-    acc * 5
-  end)
-
-  @doc """
-  Returns a pair of integers whose ratio is exactly equal
-  to the original float and with a positive denominator.
-
-  ## Examples
-
-      iex> Float.ratio(0.0)
-      {0, 1}
-      iex> Float.ratio(3.14)
-      {7070651414971679, 2251799813685248}
-      iex> Float.ratio(-3.14)
-      {-7070651414971679, 2251799813685248}
-      iex> Float.ratio(1.5)
-      {3, 2}
-      iex> Float.ratio(-1.5)
-      {-3, 2}
-      iex> Float.ratio(16.0)
-      {16, 1}
-      iex> Float.ratio(-16.0)
-      {-16, 1}
-
-  """
-  @doc since: "1.4.0"
-  @spec ratio(float) :: {integer, pos_integer}
-  def ratio(0.0), do: {0, 1}
-
-  def ratio(float) when is_float(float) do
-    case <<float::float>> do
-      <<sign::1, 0::11, significant::52-bitstring>> ->
-        {num, _, den} = decompose(significant, 0)
-        {sign(sign, num), shift_left(den, 1022)}
-
-      <<sign::1, exp::11, significant::52-bitstring>> ->
-        {num, _, den} = decompose(significant, 1)
-        num = sign(sign, num)
-
-        case exp - 1023 do
-          exp when exp > 0 ->
-            {den, exp} = shift_right(den, exp)
-            {shift_left(num, exp), den}
-
-          exp when exp < 0 ->
-            {num, shift_left(den, -exp)}
-
-          0 ->
-            {num, den}
-        end
-    end
-  end
-
-  defp decompose(significant, initial) do
-    decompose(significant, 1, 0, 2, 1, initial)
-  end
-
-  defp decompose(<<1::1, bits::bitstring>>, count, last_count, power, _last_power, acc) do
-    decompose(bits, count + 1, count, power <<< 1, power, shift_left(acc, count - last_count) + 1)
-  end
-
-  defp decompose(<<0::1, bits::bitstring>>, count, last_count, power, last_power, acc) do
-    decompose(bits, count + 1, last_count, power <<< 1, last_power, acc)
-  end
-
-  defp decompose(<<>>, _count, last_count, _power, last_power, acc) do
-    {acc, last_count, last_power}
-  end
-
-  defp sign(0, num), do: num
-  defp sign(1, num), do: -num
-
-  defp shift_left(num, 0), do: num
-  defp shift_left(num, times), do: shift_left(num <<< 1, times - 1)
-
-  defp shift_right(num, 0), do: {num, 0}
-  defp shift_right(1, times), do: {1, times}
-  defp shift_right(num, times), do: shift_right(num >>> 1, times - 1)
-
-  @doc """
-  Returns a charlist which corresponds to the text representation
-  of the given float.
-
-  It uses the shortest representation according to algorithm described
-  in "Printing Floating-Point Numbers Quickly and Accurately" in
-  Proceedings of the SIGPLAN '96 Conference on Programming Language
-  Design and Implementation.
-
-  ## Examples
-
-      iex> Float.to_charlist(7.0)
-      '7.0'
-
-  """
-  @spec to_charlist(float) :: charlist
-  def to_charlist(float) when is_float(float) do
-    :io_lib_format.fwrite_g(float)
-  end
-
-  @doc """
-  Returns a binary which corresponds to the text representation
-  of the given float.
-
-  It uses the shortest representation according to algorithm described
-  in "Printing Floating-Point Numbers Quickly and Accurately" in
-  Proceedings of the SIGPLAN '96 Conference on Programming Language
-  Design and Implementation.
-
-  ## Examples
-
-      iex> Float.to_string(7.0)
-      "7.0"
-
-  """
-  @spec to_string(float) :: String.t()
-  def to_string(float) when is_float(float) do
-    IO.iodata_to_binary(:io_lib_format.fwrite_g(float))
-  end
-
-  @doc false
-  # TODO: Remove by 2.0
-  @deprecated "Use Float.to_charlist/1 instead"
-  def to_char_list(float), do: Float.to_charlist(float)
-
-  @doc false
-  # TODO: Remove by 2.0
-  @deprecated "Use :erlang.float_to_list/2 instead"
-  def to_char_list(float, options) do
-    :erlang.float_to_list(float, expand_compact(options))
-  end
-
-  @doc false
-  # TODO: Remove by 2.0
-  @deprecated "Use :erlang.float_to_binary/2 instead"
-  def to_string(float, options) do
-    :erlang.float_to_binary(float, expand_compact(options))
-  end
-
-  defp invalid_precision_message(precision) do
-    "precision #{precision} is out of valid range of #{inspect(@precision_range)}"
-  end
-
-  defp expand_compact([{:compact, false} | t]), do: expand_compact(t)
-  defp expand_compact([{:compact, true} | t]), do: [:compact | expand_compact(t)]
-  defp expand_compact([h | t]), do: [h | expand_compact(t)]
-  defp expand_compact([]), do: []
-end

lib/elixir/lib/function.ex

@@ -1,137 +0,0 @@
-defmodule Function do
-  @moduledoc """
-  A set of functions for working with functions.
-
-  There are two types of captured functions: **external** and **local**.
-  External functions are functions residing in modules that are captured
-  with `&/1`, such as `&String.length/1`. Local functions are anonymous functions
-  defined with `fn/1` or with the capture operator `&/1` using `&1`, `&2`,
-  and so on as replacements.
-  """
-
-  @type information ::
-          :arity
-          | :env
-          | :index
-          | :module
-          | :name
-          | :new_index
-          | :new_uniq
-          | :pid
-          | :type
-          | :uniq
-
-  @doc """
-  Captures the given function.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Function.capture(String, :length, 1)
-      &String.length/1
-
-  """
-  @doc since: "1.7.0"
-  @spec capture(module, atom, arity) :: fun
-  def capture(module, function_name, arity) do
-    :erlang.make_fun(module, function_name, arity)
-  end
-
-  @doc """
-  Returns a keyword list with information about a function.
-
-  The returned keys (with the corresponding possible values) for
-  all types of functions (local and external) are the following:
-
-    * `:type` - `:local` (for anonymous functions) or `:external` (for
-      named functions).
-
-    * `:module` - an atom which is the module where the function is defined when
-    anonymous or the module which the function refers to when it's a named function.
-
-    * `:arity` - (integer) the number of arguments the function is to be called with.
-
-    * `:name` - (atom) the name of the function.
-
-    * `:env` - a list of the environment or free variables. For named
-      functions, the returned list is always empty.
-
-  When `fun` is an anonymous function (that is, the type is `:local`), the following
-  additional keys are returned:
-
-    * `:pid` - PID of the process that originally created the function.
-
-    * `:index` - (integer) an index into the module function table.
-
-    * `:new_index` - (integer) an index into the module function table.
-
-    * `:new_uniq` - (binary) a unique value for this function. It's
-      calculated from the compiled code for the entire module.
-
-    * `:uniq` - (integer) a unique value for this function. This integer is
-      calculated from the compiled code for the entire module.
-
-  **Note**: this function must be used only for debugging purposes.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> fun = fn x -> x end
-      iex> info = Function.info(fun)
-      iex> Keyword.get(info, :arity)
-      1
-      iex> Keyword.get(info, :type)
-      :local
-
-      iex> fun = &String.length/1
-      iex> info = Function.info(fun)
-      iex> Keyword.get(info, :type)
-      :external
-      iex> Keyword.get(info, :name)
-      :length
-
-  """
-  @doc since: "1.7.0"
-  @spec info(fun) :: [{information, term}]
-  def info(fun), do: :erlang.fun_info(fun)
-
-  @doc """
-  Returns a specific information about the function.
-
-  The returned information is a two-element tuple in the shape of
-  `{info, value}`.
-
-  For any function, the information asked for can be any of the atoms
-  `:module`, `:name`, `:arity`, `:env`, or `:type`.
-
-  For anonymous functions, there is also information about any of the
-  atoms `:index`, `:new_index`, `:new_uniq`, `:uniq`, and `:pid`.
-  For a named function, the value of any of these items is always the
-  atom `:undefined`.
-
-  For more information on each of the possible returned values, see
-  `info/1`.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> f = fn x -> x end
-      iex> Function.info(f, :arity)
-      {:arity, 1}
-      iex> Function.info(f, :type)
-      {:type, :local}
-
-      iex> fun = &String.length/1
-      iex> Function.info(fun, :name)
-      {:name, :length}
-      iex> Function.info(fun, :pid)
-      {:pid, :undefined}
-
-  """
-  @doc since: "1.7.0"
-  @spec info(fun, item) :: {item, term} when item: information
-  def info(fun, item), do: :erlang.fun_info(fun, item)
-end

lib/elixir/lib/gen_event.ex

@@ -1,914 +0,0 @@
-defmodule GenEvent do
-  # TODO: Remove by 2.0
-
-  # Functions from this module are deprecated in elixir_dispatch.
-
-  @moduledoc """
-  A event manager with event handlers behaviour.
-
-  If you are interested in implementing an event manager, please read the
-  "Alternatives" section below. If you have to implement an event handler to
-  integrate with an existing system, such as Elixir's Logger, please use
-  `:gen_event` instead.
-
-  ## Alternatives
-
-  There are a few suitable alternatives to replace GenEvent. Each of them can be
-  the most beneficial based on the use case.
-
-  ### Supervisor and GenServers
-
-  One alternative to GenEvent is a very minimal solution consisting of using a
-  supervisor and multiple GenServers started under it. The supervisor acts as
-  the "event manager" and the children GenServers act as the "event handlers".
-  This approach has some shortcomings (it provides no backpressure for example)
-  but can still replace GenEvent for low-profile usages of it. [This blog post
-  by José
-  Valim](http://blog.plataformatec.com.br/2016/11/replacing-genevent-by-a-supervisor-genserver/)
-  has more detailed information on this approach.
-
-  ### GenStage
-
-  If the use case where you were using GenEvent requires more complex logic,
-  [GenStage](https://github.com/elixir-lang/gen_stage) provides a great
-  alternative. GenStage is an external Elixir library maintained by the Elixir
-  team; it provides a tool to implement systems that exchange events in a
-  demand-driven way with built-in support for backpressure. See the [GenStage
-  documentation](https://hexdocs.pm/gen_stage) for more information.
-
-  ### `:gen_event`
-
-  If your use case requires exactly what GenEvent provided, or you have to
-  integrate with an existing `:gen_event`-based system, you can still use the
-  [`:gen_event`](http://erlang.org/doc/man/gen_event.html) Erlang module.
-  """
-
-  @moduledoc deprecated: "Use Erlang/OTP's :gen_event module instead"
-
-  @callback init(args :: term) ::
-              {:ok, state}
-              | {:ok, state, :hibernate}
-              | {:error, reason :: any}
-            when state: any
-
-  @callback handle_event(event :: term, state :: term) ::
-              {:ok, new_state}
-              | {:ok, new_state, :hibernate}
-              | :remove_handler
-            when new_state: term
-
-  @callback handle_call(request :: term, state :: term) ::
-              {:ok, reply, new_state}
-              | {:ok, reply, new_state, :hibernate}
-              | {:remove_handler, reply}
-            when reply: term, new_state: term
-
-  @callback handle_info(msg :: term, state :: term) ::
-              {:ok, new_state}
-              | {:ok, new_state, :hibernate}
-              | :remove_handler
-            when new_state: term
-
-  @callback terminate(reason, state :: term) :: term
-            when reason: :stop | {:stop, term} | :remove_handler | {:error, term} | term
-
-  @callback code_change(old_vsn, state :: term, extra :: term) :: {:ok, new_state :: term}
-            when old_vsn: term | {:down, term}
-
-  @type on_start :: {:ok, pid} | {:error, {:already_started, pid}}
-
-  @type name :: atom | {:global, term} | {:via, module, term}
-
-  @type options :: [name: name]
-
-  @type manager :: pid | name | {atom, node}
-
-  @type handler :: atom | {atom, term}
-
-  message = "Use one of the alternatives described in the documentation for the GenEvent module"
-
-  @deprecated message
-  @doc false
-  defmacro __using__(_) do
-    %{file: file, line: line} = __CALLER__
-
-    deprecation_message =
-      "the GenEvent module is deprecated, see its documentation for alternatives"
-
-    :elixir_errors.warn(line, file, deprecation_message)
-
-    quote location: :keep do
-      @behaviour :gen_event
-
-      @doc false
-      def init(args) do
-        {:ok, args}
-      end
-
-      @doc false
-      def handle_event(_event, state) do
-        {:ok, state}
-      end
-
-      @doc false
-      def handle_call(msg, state) do
-        proc =
-          case Process.info(self(), :registered_name) do
-            {_, []} -> self()
-            {_, name} -> name
-          end
-
-        # We do this to trick Dialyzer to not complain about non-local returns.
-        case :erlang.phash2(1, 1) do
-          0 ->
-            raise "attempted to call GenEvent #{inspect(proc)} but no handle_call/2 clause was provided"
-
-          1 ->
-            {:remove_handler, {:bad_call, msg}}
-        end
-      end
-
-      @doc false
-      def handle_info(_msg, state) do
-        {:ok, state}
-      end
-
-      @doc false
-      def terminate(_reason, _state) do
-        :ok
-      end
-
-      @doc false
-      def code_change(_old, state, _extra) do
-        {:ok, state}
-      end
-
-      defoverridable init: 1,
-                     handle_event: 2,
-                     handle_call: 2,
-                     handle_info: 2,
-                     terminate: 2,
-                     code_change: 3
-    end
-  end
-
-  @doc false
-  @deprecated message
-  @spec start_link(options) :: on_start
-  def start_link(options \\ []) when is_list(options) do
-    do_start(:link, options)
-  end
-
-  @doc false
-  @deprecated message
-  @spec start(options) :: on_start
-  def start(options \\ []) when is_list(options) do
-    do_start(:nolink, options)
-  end
-
-  @no_callback :"no callback module"
-
-  defp do_start(mode, options) do
-    case Keyword.get(options, :name) do
-      nil ->
-        :gen.start(GenEvent, mode, @no_callback, [], [])
-
-      atom when is_atom(atom) ->
-        :gen.start(GenEvent, mode, {:local, atom}, @no_callback, [], [])
-
-      {:global, _term} = tuple ->
-        :gen.start(GenEvent, mode, tuple, @no_callback, [], [])
-
-      {:via, via_module, _term} = tuple when is_atom(via_module) ->
-        :gen.start(GenEvent, mode, tuple, @no_callback, [], [])
-
-      other ->
-        raise ArgumentError, """
-        expected :name option to be one of the following:
-
-          * nil
-          * atom
-          * {:global, term}
-          * {:via, module, term}
-
-        Got: #{inspect(other)}
-        """
-    end
-  end
-
-  @doc false
-  @deprecated message
-  @spec stream(manager, keyword) :: GenEvent.Stream.t()
-  def stream(manager, options \\ []) do
-    %GenEvent.Stream{manager: manager, timeout: Keyword.get(options, :timeout, :infinity)}
-  end
-
-  @doc false
-  @deprecated message
-  @spec add_handler(manager, handler, term) :: :ok | {:error, term}
-  def add_handler(manager, handler, args) do
-    rpc(manager, {:add_handler, handler, args})
-  end
-
-  @doc false
-  @deprecated message
-  @spec add_mon_handler(manager, handler, term) :: :ok | {:error, term}
-  def add_mon_handler(manager, handler, args) do
-    rpc(manager, {:add_mon_handler, handler, args, self()})
-  end
-
-  @doc false
-  @deprecated message
-  @spec notify(manager, term) :: :ok
-  def notify(manager, event)
-
-  def notify({:global, name}, msg) do
-    try do
-      :global.send(name, {:notify, msg})
-      :ok
-    catch
-      _, _ -> :ok
-    end
-  end
-
-  def notify({:via, mod, name}, msg) when is_atom(mod) do
-    try do
-      mod.send(name, {:notify, msg})
-      :ok
-    catch
-      _, _ -> :ok
-    end
-  end
-
-  def notify(manager, msg)
-      when is_pid(manager)
-      when is_atom(manager)
-      when tuple_size(manager) == 2 and is_atom(elem(manager, 0)) and is_atom(elem(manager, 1)) do
-    send(manager, {:notify, msg})
-    :ok
-  end
-
-  @doc false
-  @deprecated message
-  @spec sync_notify(manager, term) :: :ok
-  def sync_notify(manager, event) do
-    rpc(manager, {:sync_notify, event})
-  end
-
-  @doc false
-  @deprecated message
-  @spec ack_notify(manager, term) :: :ok
-  def ack_notify(manager, event) do
-    rpc(manager, {:ack_notify, event})
-  end
-
-  @doc false
-  @deprecated message
-  @spec call(manager, handler, term, timeout) :: term | {:error, term}
-  def call(manager, handler, request, timeout \\ 5000) do
-    try do
-      :gen.call(manager, self(), {:call, handler, request}, timeout)
-    catch
-      :exit, reason ->
-        exit({reason, {__MODULE__, :call, [manager, handler, request, timeout]}})
-    else
-      {:ok, res} -> res
-    end
-  end
-
-  @doc false
-  @deprecated message
-  @spec remove_handler(manager, handler, term) :: term | {:error, term}
-  def remove_handler(manager, handler, args) do
-    rpc(manager, {:delete_handler, handler, args})
-  end
-
-  @doc false
-  @deprecated message
-  @spec swap_handler(manager, handler, term, handler, term) :: :ok | {:error, term}
-  def swap_handler(manager, handler1, args1, handler2, args2) do
-    rpc(manager, {:swap_handler, handler1, args1, handler2, args2})
-  end
-
-  @doc false
-  @deprecated message
-  @spec swap_mon_handler(manager, handler, term, handler, term) :: :ok | {:error, term}
-  def swap_mon_handler(manager, handler1, args1, handler2, args2) do
-    rpc(manager, {:swap_mon_handler, handler1, args1, handler2, args2, self()})
-  end
-
-  @doc false
-  @deprecated message
-  @spec which_handlers(manager) :: [handler]
-  def which_handlers(manager) do
-    rpc(manager, :which_handlers)
-  end
-
-  @doc false
-  @deprecated message
-  @spec stop(manager, reason :: term, timeout) :: :ok
-  def stop(manager, reason \\ :normal, timeout \\ :infinity) do
-    :gen.stop(manager, reason, timeout)
-  end
-
-  defp rpc(module, cmd) do
-    {:ok, reply} = :gen.call(module, self(), cmd, :infinity)
-    reply
-  end
-
-  ## Init callbacks
-
-  require Record
-  Record.defrecordp(:handler, [:module, :id, :state, :pid, :ref])
-
-  @doc false
-  def init_it(starter, :self, name, mod, args, options) do
-    init_it(starter, self(), name, mod, args, options)
-  end
-
-  def init_it(starter, parent, name, _mod, _args, options) do
-    Process.put(:"$initial_call", {__MODULE__, :init_it, 6})
-
-    debug =
-      if function_exported?(:gen, :debug_options, 2) do
-        :gen.debug_options(name, options)
-      else
-        :gen.debug_options(options)
-      end
-
-    :proc_lib.init_ack(starter, {:ok, self()})
-    loop(parent, name(name), [], debug, false)
-  end
-
-  @doc false
-  def init_hib(parent, name, handlers, debug) do
-    fetch_msg(parent, name, handlers, debug, true)
-  end
-
-  defp name({:local, name}), do: name
-  defp name({:global, name}), do: name
-  defp name({:via, _, name}), do: name
-  defp name(pid) when is_pid(pid), do: pid
-
-  ## Loop
-
-  defp loop(parent, name, handlers, debug, true) do
-    :proc_lib.hibernate(__MODULE__, :init_hib, [parent, name, handlers, debug])
-  end
-
-  defp loop(parent, name, handlers, debug, false) do
-    fetch_msg(parent, name, handlers, debug, false)
-  end
-
-  defp fetch_msg(parent, name, handlers, debug, hib) do
-    receive do
-      {:system, from, req} ->
-        :sys.handle_system_msg(req, from, parent, __MODULE__, debug, [name, handlers, hib], hib)
-
-      {:EXIT, ^parent, reason} ->
-        server_terminate(reason, parent, handlers, name)
-
-      msg when debug == [] ->
-        handle_msg(msg, parent, name, handlers, [])
-
-      msg ->
-        debug = :sys.handle_debug(debug, &print_event/3, name, {:in, msg})
-        handle_msg(msg, parent, name, handlers, debug)
-    end
-  end
-
-  defp handle_msg(msg, parent, name, handlers, debug) do
-    case msg do
-      {:notify, event} ->
-        {hib, handlers} = server_event(:async, event, handlers, name)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, _tag, {:notify, event}} ->
-        {hib, handlers} = server_event(:async, event, handlers, name)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:ack_notify, event}} ->
-        reply(tag, :ok)
-        {hib, handlers} = server_event(:ack, event, handlers, name)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:sync_notify, event}} ->
-        {hib, handlers} = server_event(:sync, event, handlers, name)
-        reply(tag, :ok)
-        loop(parent, name, handlers, debug, hib)
-
-      {:DOWN, ref, :process, _pid, reason} = other ->
-        case handle_down(ref, reason, handlers, name) do
-          {:ok, handlers} ->
-            loop(parent, name, handlers, debug, false)
-
-          :error ->
-            {hib, handlers} = server_info(other, handlers, name)
-            loop(parent, name, handlers, debug, hib)
-        end
-
-      {_from, tag, {:call, handler, query}} ->
-        {hib, reply, handlers} = server_call(handler, query, handlers, name)
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:add_handler, handler, args}} ->
-        {hib, reply, handlers} = server_add_handler(handler, args, handlers)
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:add_mon_handler, handler, args, notify}} ->
-        {hib, reply, handlers} = server_add_mon_handler(handler, args, handlers, notify)
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:add_process_handler, pid, notify}} ->
-        {hib, reply, handlers} = server_add_process_handler(pid, handlers, notify)
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:delete_handler, handler, args}} ->
-        {reply, handlers} = server_remove_handler(handler, args, handlers, name)
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, false)
-
-      {_from, tag, {:swap_handler, handler1, args1, handler2, args2}} ->
-        {hib, reply, handlers} =
-          server_swap_handler(handler1, args1, handler2, args2, handlers, nil, name)
-
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, {:swap_mon_handler, handler1, args1, handler2, args2, mon}} ->
-        {hib, reply, handlers} =
-          server_swap_handler(handler1, args1, handler2, args2, handlers, mon, name)
-
-        reply(tag, reply)
-        loop(parent, name, handlers, debug, hib)
-
-      {_from, tag, :which_handlers} ->
-        reply(tag, server_which_handlers(handlers))
-        loop(parent, name, handlers, debug, false)
-
-      {_from, tag, :get_modules} ->
-        reply(tag, server_get_modules(handlers))
-        loop(parent, name, handlers, debug, false)
-
-      other ->
-        {hib, handlers} = server_info(other, handlers, name)
-        loop(parent, name, handlers, debug, hib)
-    end
-  end
-
-  ## System callbacks
-
-  @doc false
-  def system_continue(parent, debug, [name, handlers, hib]) do
-    loop(parent, name, handlers, debug, hib)
-  end
-
-  @doc false
-  def system_terminate(reason, parent, _debug, [name, handlers, _hib]) do
-    server_terminate(reason, parent, handlers, name)
-  end
-
-  @doc false
-  def system_code_change([name, handlers, hib], module, old_vsn, extra) do
-    handlers =
-      for handler <- handlers do
-        if handler(handler, :module) == module do
-          {:ok, state} = module.code_change(old_vsn, handler(handler, :state), extra)
-          handler(handler, state: state)
-        else
-          handler
-        end
-      end
-
-    {:ok, [name, handlers, hib]}
-  end
-
-  @doc false
-  def system_get_state([_name, handlers, _hib]) do
-    tuples =
-      for handler(module: mod, id: id, state: state) <- handlers do
-        {mod, id, state}
-      end
-
-    {:ok, tuples}
-  end
-
-  @doc false
-  def system_replace_state(fun, [name, handlers, hib]) do
-    {handlers, states} =
-      :lists.unzip(
-        for handler <- handlers do
-          handler(module: mod, id: id, state: state) = handler
-          cur = {mod, id, state}
-
-          try do
-            new = {^mod, ^id, new_state} = fun.(cur)
-            {handler(handler, state: new_state), new}
-          catch
-            _, _ ->
-              {handler, cur}
-          end
-        end
-      )
-
-    {:ok, states, [name, handlers, hib]}
-  end
-
-  @doc false
-  def format_status(opt, status_data) do
-    [pdict, sys_state, parent, _debug, [name, handlers, _hib]] = status_data
-    header = :gen.format_status_header('Status for event handler', name)
-
-    formatted =
-      for handler <- handlers do
-        handler(module: module, state: state) = handler
-
-        if function_exported?(module, :format_status, 2) do
-          try do
-            state = module.format_status(opt, [pdict, state])
-            handler(handler, state: state)
-          catch
-            _, _ -> handler
-          end
-        else
-          handler
-        end
-      end
-
-    [
-      header: header,
-      data: [{'Status', sys_state}, {'Parent', parent}],
-      items: {'Installed handlers', formatted}
-    ]
-  end
-
-  ## Loop helpers
-
-  defp print_event(dev, {:in, msg}, name) do
-    case msg do
-      {:notify, event} ->
-        IO.puts(dev, "*DBG* #{inspect(name)} got event #{inspect(event)}")
-
-      {_, _, {:call, handler, query}} ->
-        IO.puts(
-          dev,
-          "*DBG* #{inspect(name)} (handler #{inspect(handler)}) got call #{inspect(query)}"
-        )
-
-      _ ->
-        IO.puts(dev, "*DBG* #{inspect(name)} got #{inspect(msg)}")
-    end
-  end
-
-  defp print_event(dev, dbg, name) do
-    IO.puts(dev, "*DBG* #{inspect(name)}: #{inspect(dbg)}")
-  end
-
-  defp server_add_handler({module, id}, args, handlers) do
-    handler = handler(module: module, id: {module, id})
-    do_add_handler(module, handler, args, handlers, :ok)
-  end
-
-  defp server_add_handler(module, args, handlers) do
-    handler = handler(module: module, id: module)
-    do_add_handler(module, handler, args, handlers, :ok)
-  end
-
-  defp server_add_mon_handler({module, id}, args, handlers, notify) do
-    ref = Process.monitor(notify)
-    handler = handler(module: module, id: {module, id}, pid: notify, ref: ref)
-    do_add_handler(module, handler, args, handlers, :ok)
-  end
-
-  defp server_add_mon_handler(module, args, handlers, notify) do
-    ref = Process.monitor(notify)
-    handler = handler(module: module, id: module, pid: notify, ref: ref)
-    do_add_handler(module, handler, args, handlers, :ok)
-  end
-
-  defp server_add_process_handler(pid, handlers, notify) do
-    ref = Process.monitor(pid)
-    handler = handler(module: GenEvent.Stream, id: {self(), ref}, pid: notify, ref: ref)
-    do_add_handler(GenEvent.Stream, handler, {pid, ref}, handlers, {self(), ref})
-  end
-
-  defp server_remove_handler(module, args, handlers, name) do
-    do_take_handler(module, args, handlers, name, :remove, :normal)
-  end
-
-  defp server_swap_handler(module1, args1, module2, args2, handlers, sup, name) do
-    {state, handlers} =
-      do_take_handler(module1, args1, handlers, name, :swapped, {:swapped, module2, sup})
-
-    if sup do
-      server_add_mon_handler(module2, {args2, state}, handlers, sup)
-    else
-      server_add_handler(module2, {args2, state}, handlers)
-    end
-  end
-
-  defp server_info(event, handlers, name) do
-    handlers = :lists.reverse(handlers)
-    server_notify(event, :handle_info, handlers, name, handlers, [], false)
-  end
-
-  defp server_event(mode, event, handlers, name) do
-    {handlers, streams} = server_split_process_handlers(mode, event, handlers, [], [])
-    {hib, handlers} = server_notify(event, :handle_event, handlers, name, handlers, [], false)
-    {hib, server_collect_process_handlers(mode, event, streams, handlers, name)}
-  end
-
-  defp server_split_process_handlers(mode, event, [handler | t], handlers, streams) do
-    case handler(handler, :id) do
-      {pid, _ref} when is_pid(pid) ->
-        server_process_notify(mode, event, handler)
-        server_split_process_handlers(mode, event, t, handlers, [handler | streams])
-
-      _ ->
-        server_split_process_handlers(mode, event, t, [handler | handlers], streams)
-    end
-  end
-
-  defp server_split_process_handlers(_mode, _event, [], handlers, streams) do
-    {handlers, streams}
-  end
-
-  defp server_process_notify(mode, event, handler(state: {pid, ref})) do
-    send(pid, {self(), {self(), ref}, {mode_to_tag(mode), event}})
-  end
-
-  defp mode_to_tag(:ack), do: :ack_notify
-  defp mode_to_tag(:sync), do: :sync_notify
-  defp mode_to_tag(:async), do: :notify
-
-  defp server_notify(event, fun, [handler | t], name, handlers, acc, hib) do
-    case server_update(handler, fun, event, name, handlers) do
-      {new_hib, handler} ->
-        server_notify(event, fun, t, name, handlers, [handler | acc], hib or new_hib)
-
-      :error ->
-        server_notify(event, fun, t, name, handlers, acc, hib)
-    end
-  end
-
-  defp server_notify(_, _, [], _, _, acc, hib) do
-    {hib, acc}
-  end
-
-  defp server_update(handler, fun, event, name, _handlers) do
-    handler(module: module, state: state) = handler
-
-    case do_handler(module, fun, [event, state]) do
-      {:ok, res} ->
-        case res do
-          {:ok, state} ->
-            {false, handler(handler, state: state)}
-
-          {:ok, state, :hibernate} ->
-            {true, handler(handler, state: state)}
-
-          :remove_handler ->
-            do_terminate(handler, :remove_handler, event, name, :normal)
-            :error
-
-          other ->
-            reason = {:bad_return_value, other}
-            do_terminate(handler, {:error, reason}, event, name, reason)
-            :error
-        end
-
-      {:error, reason} ->
-        do_terminate(handler, {:error, reason}, event, name, reason)
-        :error
-    end
-  end
-
-  defp server_collect_process_handlers(:async, event, [handler | t], handlers, name) do
-    server_collect_process_handlers(:async, event, t, [handler | handlers], name)
-  end
-
-  defp server_collect_process_handlers(mode, event, [handler | t], handlers, name)
-       when mode in [:sync, :ack] do
-    handler(ref: ref, id: id) = handler
-
-    receive do
-      {^ref, :ok} ->
-        server_collect_process_handlers(mode, event, t, [handler | handlers], name)
-
-      {_from, tag, {:delete_handler, ^id, args}} ->
-        do_terminate(handler, args, :remove, name, :normal)
-        reply(tag, :ok)
-        server_collect_process_handlers(mode, event, t, handlers, name)
-
-      {:DOWN, ^ref, _, _, reason} ->
-        do_terminate(handler, {:stop, reason}, :DOWN, name, :shutdown)
-        server_collect_process_handlers(mode, event, t, handlers, name)
-    end
-  end
-
-  defp server_collect_process_handlers(_mode, _event, [], handlers, _name) do
-    handlers
-  end
-
-  defp server_call(module, query, handlers, name) do
-    case :lists.keyfind(module, handler(:id) + 1, handlers) do
-      false ->
-        {false, {:error, :not_found}, handlers}
-
-      handler ->
-        case server_call_update(handler, query, name, handlers) do
-          {{hib, handler}, reply} ->
-            {hib, reply, :lists.keyreplace(module, handler(:id) + 1, handlers, handler)}
-
-          {:error, reply} ->
-            {false, reply, :lists.keydelete(module, handler(:id) + 1, handlers)}
-        end
-    end
-  end
-
-  defp server_call_update(handler, query, name, _handlers) do
-    handler(module: module, state: state) = handler
-
-    case do_handler(module, :handle_call, [query, state]) do
-      {:ok, res} ->
-        case res do
-          {:ok, reply, state} ->
-            {{false, handler(handler, state: state)}, reply}
-
-          {:ok, reply, state, :hibernate} ->
-            {{true, handler(handler, state: state)}, reply}
-
-          {:remove_handler, reply} ->
-            do_terminate(handler, :remove_handler, query, name, :normal)
-            {:error, reply}
-
-          other ->
-            reason = {:bad_return_value, other}
-            do_terminate(handler, {:error, reason}, query, name, reason)
-            {:error, {:error, reason}}
-        end
-
-      {:error, reason} ->
-        do_terminate(handler, {:error, reason}, query, name, reason)
-        {:error, {:error, reason}}
-    end
-  end
-
-  defp server_get_modules(handlers) do
-    for(handler(module: module) <- handlers, do: module)
-    |> :ordsets.from_list()
-    |> :ordsets.to_list()
-  end
-
-  defp server_which_handlers(handlers) do
-    for handler(id: id) <- handlers, do: id
-  end
-
-  defp server_terminate(reason, _parent, handlers, name) do
-    _ =
-      for handler <- handlers do
-        do_terminate(handler, :stop, :stop, name, :shutdown)
-      end
-
-    exit(reason)
-  end
-
-  defp reply({from, ref}, msg) do
-    send(from, {ref, msg})
-  end
-
-  defp handle_down(ref, reason, handlers, name) do
-    case :lists.keyfind(ref, handler(:ref) + 1, handlers) do
-      false ->
-        :error
-
-      handler ->
-        do_terminate(handler, {:stop, reason}, :DOWN, name, :shutdown)
-        {:ok, :lists.keydelete(ref, handler(:ref) + 1, handlers)}
-    end
-  end
-
-  defp do_add_handler(module, handler, arg, handlers, succ) do
-    case :lists.keyfind(handler(handler, :id), handler(:id) + 1, handlers) do
-      false ->
-        case do_handler(module, :init, [arg]) do
-          {:ok, res} ->
-            case res do
-              {:ok, state} ->
-                {false, succ, [handler(handler, state: state) | handlers]}
-
-              {:ok, state, :hibernate} ->
-                {true, succ, [handler(handler, state: state) | handlers]}
-
-              {:error, _} = error ->
-                {false, error, handlers}
-
-              other ->
-                {false, {:error, {:bad_return_value, other}}, handlers}
-            end
-
-          {:error, _} = error ->
-            {false, error, handlers}
-        end
-
-      _ ->
-        {false, {:error, :already_present}, handlers}
-    end
-  end
-
-  defp do_take_handler(module, args, handlers, name, last_in, reason) do
-    case :lists.keytake(module, handler(:id) + 1, handlers) do
-      {:value, handler, handlers} ->
-        {do_terminate(handler, args, last_in, name, reason), handlers}
-
-      false ->
-        {{:error, :not_found}, handlers}
-    end
-  end
-
-  defp do_terminate(handler, arg, last_in, name, reason) do
-    handler(module: module, state: state) = handler
-
-    res =
-      case do_handler(module, :terminate, [arg, state]) do
-        {:ok, res} -> res
-        {:error, _} = error -> error
-      end
-
-    report_terminate(handler, reason, state, last_in, name)
-    res
-  end
-
-  defp do_handler(mod, fun, args) do
-    try do
-      apply(mod, fun, args)
-    catch
-      :throw, val -> {:ok, val}
-      :error, val -> {:error, {val, __STACKTRACE__}}
-      :exit, val -> {:error, val}
-    else
-      res -> {:ok, res}
-    end
-  end
-
-  defp report_terminate(handler, reason, state, last_in, name) do
-    report_error(handler, reason, state, last_in, name)
-
-    if ref = handler(handler, :ref) do
-      Process.demonitor(ref, [:flush])
-    end
-
-    if pid = handler(handler, :pid) do
-      send(pid, {:gen_event_EXIT, handler(handler, :id), reason})
-    end
-  end
-
-  defp report_error(_handler, :normal, _, _, _), do: :ok
-  defp report_error(_handler, :shutdown, _, _, _), do: :ok
-  defp report_error(_handler, {:swapped, _, _}, _, _, _), do: :ok
-
-  defp report_error(handler, reason, state, last_in, name) do
-    reason =
-      case reason do
-        {:undef, [{m, f, a, _} | _] = mfas} ->
-          cond do
-            :code.is_loaded(m) == false ->
-              {:"module could not be loaded", mfas}
-
-            function_exported?(m, f, length(a)) ->
-              reason
-
-            true ->
-              {:"function not exported", mfas}
-          end
-
-        _ ->
-          reason
-      end
-
-    formatted = report_status(handler, state)
-
-    :error_logger.error_msg(
-      '** gen_event handler ~p crashed.~n' ++
-        '** Was installed in ~p~n' ++
-        '** Last event was: ~p~n' ++ '** When handler state == ~p~n' ++ '** Reason == ~p~n',
-      [handler(handler, :id), name, last_in, formatted, reason]
-    )
-  end
-
-  defp report_status(handler(module: module), state) do
-    if function_exported?(module, :format_status, 2) do
-      try do
-        module.format_status(:terminate, [Process.get(), state])
-      catch
-        _, _ -> state
-      end
-    else
-      state
-    end
-  end
-end

lib/elixir/lib/gen_event/stream.ex

@@ -1,171 +0,0 @@
-defmodule GenEvent.Stream do
-  @moduledoc false
-  defstruct manager: nil, timeout: :infinity
-
-  @type t :: %__MODULE__{manager: GenEvent.manager(), timeout: timeout}
-
-  @doc false
-  def init({_pid, _ref} = state) do
-    {:ok, state}
-  end
-
-  @doc false
-  def handle_event(event, _state) do
-    # We do this to trick Dialyzer to not complain about non-local returns.
-    case :erlang.phash2(1, 1) do
-      0 -> exit({:bad_event, event})
-      1 -> :remove_handler
-    end
-  end
-
-  @doc false
-  def handle_call(msg, _state) do
-    # We do this to trick Dialyzer to not complain about non-local returns.
-    reason = {:bad_call, msg}
-
-    case :erlang.phash2(1, 1) do
-      0 -> exit(reason)
-      1 -> {:remove_handler, reason}
-    end
-  end
-
-  @doc false
-  def handle_info(_msg, state) do
-    {:ok, state}
-  end
-
-  @doc false
-  def terminate(_reason, _state) do
-    :ok
-  end
-
-  @doc false
-  def code_change(_old, state, _extra) do
-    {:ok, state}
-  end
-end
-
-defimpl Enumerable, for: GenEvent.Stream do
-  def reduce(stream, acc, fun) do
-    start_fun = fn -> start(stream) end
-    next_fun = &next(stream, &1)
-    stop_fun = &stop(stream, &1)
-    Stream.resource(start_fun, next_fun, stop_fun).(acc, wrap_reducer(fun))
-  end
-
-  def count(_stream) do
-    {:error, __MODULE__}
-  end
-
-  def member?(_stream, _item) do
-    {:error, __MODULE__}
-  end
-
-  def slice(_stream) do
-    {:error, __MODULE__}
-  end
-
-  defp wrap_reducer(fun) do
-    fn
-      {:ack, manager, ref, event}, acc ->
-        send(manager, {ref, :ok})
-        fun.(event, acc)
-
-      {:async, _manager, _ref, event}, acc ->
-        fun.(event, acc)
-
-      {:sync, manager, ref, event}, acc ->
-        try do
-          fun.(event, acc)
-        after
-          send(manager, {ref, :ok})
-        end
-    end
-  end
-
-  defp start(%{manager: manager} = stream) do
-    try do
-      {:ok, {pid, ref}} =
-        :gen.call(manager, self(), {:add_process_handler, self(), self()}, :infinity)
-
-      mon_ref = Process.monitor(pid)
-      {pid, ref, mon_ref}
-    catch
-      :exit, reason -> exit({reason, {__MODULE__, :start, [stream]}})
-    end
-  end
-
-  defp next(%{timeout: timeout} = stream, {pid, ref, mon_ref} = acc) do
-    self = self()
-
-    receive do
-      # Got an async event.
-      {_from, {^pid, ^ref}, {:notify, event}} ->
-        {[{:async, pid, ref, event}], acc}
-
-      # Got a sync event.
-      {_from, {^pid, ^ref}, {:sync_notify, event}} ->
-        {[{:sync, pid, ref, event}], acc}
-
-      # Got an ack event.
-      {_from, {^pid, ^ref}, {:ack_notify, event}} ->
-        {[{:ack, pid, ref, event}], acc}
-
-      # The handler was removed. Stop iteration, resolve the
-      # event later. We need to demonitor now, otherwise DOWN
-      # appears with higher priority in the shutdown process.
-      {:gen_event_EXIT, {^pid, ^ref}, _reason} = event ->
-        Process.demonitor(mon_ref, [:flush])
-        send(self, event)
-        {:halt, {:removed, acc}}
-
-      # The manager died. Stop iteration, resolve the event later.
-      {:DOWN, ^mon_ref, _, _, _} = event ->
-        send(self, event)
-        {:halt, {:removed, acc}}
-    after
-      timeout ->
-        exit({:timeout, {__MODULE__, :next, [stream, acc]}})
-    end
-  end
-
-  # If we reach this branch, we know the handler was already
-  # removed, so we don't trigger a request for doing so.
-  defp stop(stream, {:removed, {pid, ref, mon_ref} = acc}) do
-    case wait_for_handler_removal(pid, ref, mon_ref) do
-      :ok ->
-        flush_events(ref)
-
-      {:error, reason} ->
-        exit({reason, {__MODULE__, :stop, [stream, acc]}})
-    end
-  end
-
-  # If we reach this branch, the handler was not removed yet,
-  # so we trigger a request for doing so.
-  defp stop(stream, {pid, ref, _} = acc) do
-    _ = :gen_event.delete_handler(pid, {pid, ref}, :shutdown)
-    stop(stream, {:removed, acc})
-  end
-
-  defp wait_for_handler_removal(pid, ref, mon_ref) do
-    receive do
-      {:gen_event_EXIT, {^pid, ^ref}, _reason} ->
-        Process.demonitor(mon_ref, [:flush])
-        :ok
-
-      {:DOWN, ^mon_ref, _, _, reason} ->
-        {:error, reason}
-    end
-  end
-
-  defp flush_events(ref) do
-    receive do
-      {_from, {_pid, ^ref}, {notify, _event}}
-      when notify in [:notify, :ack_notify, :sync_notify] ->
-        flush_events(ref)
-    after
-      0 -> :ok
-    end
-  end
-end

lib/elixir/lib/hash_dict.ex

@@ -1,311 +0,0 @@
-defmodule HashDict do
-  @moduledoc """
-  Tuple-based HashDict implementation.
-
-  This module is deprecated. Use the `Map` module instead.
-  """
-
-  @moduledoc deprecated: "Use Map instead"
-
-  # TODO: Remove by 2.0
-
-  use Dict
-
-  @node_bitmap 0b111
-  @node_shift 3
-  @node_size 8
-  @node_template :erlang.make_tuple(@node_size, [])
-
-  @opaque t :: %__MODULE__{size: non_neg_integer, root: term}
-  @doc false
-  defstruct size: 0, root: @node_template
-
-  # Inline common instructions
-  @compile :inline_list_funcs
-  @compile {:inline, key_hash: 1, key_mask: 1, key_shift: 1}
-
-  message = "Use maps and the Map module instead"
-
-  @doc """
-  Creates a new empty dict.
-  """
-  @spec new :: Dict.t()
-  @deprecated message
-  def new do
-    %HashDict{}
-  end
-
-  @deprecated message
-  def put(%HashDict{root: root, size: size}, key, value) do
-    {root, counter} = do_put(root, key, value, key_hash(key))
-    %HashDict{root: root, size: size + counter}
-  end
-
-  @deprecated message
-  def update!(%HashDict{root: root, size: size} = dict, key, fun) when is_function(fun, 1) do
-    {root, counter} =
-      do_update(root, key, fn -> raise KeyError, key: key, term: dict end, fun, key_hash(key))
-
-    %HashDict{root: root, size: size + counter}
-  end
-
-  @deprecated message
-  def update(%HashDict{root: root, size: size}, key, initial, fun) when is_function(fun, 1) do
-    {root, counter} = do_update(root, key, fn -> initial end, fun, key_hash(key))
-    %HashDict{root: root, size: size + counter}
-  end
-
-  @deprecated message
-  def fetch(%HashDict{root: root}, key) do
-    do_fetch(root, key, key_hash(key))
-  end
-
-  @deprecated message
-  def delete(dict, key) do
-    case dict_delete(dict, key) do
-      {dict, _value} -> dict
-      :error -> dict
-    end
-  end
-
-  @deprecated message
-  def pop(dict, key, default \\ nil) do
-    case dict_delete(dict, key) do
-      {dict, value} -> {value, dict}
-      :error -> {default, dict}
-    end
-  end
-
-  @deprecated message
-  def size(%HashDict{size: size}) do
-    size
-  end
-
-  @doc false
-  @deprecated message
-  def reduce(%HashDict{root: root}, acc, fun) do
-    do_reduce(root, acc, fun, @node_size, fn
-      {:suspend, acc} -> {:suspended, acc, &{:done, elem(&1, 1)}}
-      {:halt, acc} -> {:halted, acc}
-      {:cont, acc} -> {:done, acc}
-    end)
-  end
-
-  ## General helpers
-
-  @doc false
-  def dict_delete(%HashDict{root: root, size: size}, key) do
-    case do_delete(root, key, key_hash(key)) do
-      {root, value} -> {%HashDict{root: root, size: size - 1}, value}
-      :error -> :error
-    end
-  end
-
-  ## Dict manipulation
-
-  defp do_fetch(node, key, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [^key | v] -> {:ok, v}
-      {^key, v, _} -> {:ok, v}
-      {_, _, n} -> do_fetch(n, key, key_shift(hash))
-      _ -> :error
-    end
-  end
-
-  defp do_put(node, key, value, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] ->
-        {put_elem(node, index, [key | value]), 1}
-
-      [^key | _] ->
-        {put_elem(node, index, [key | value]), 0}
-
-      [k | v] ->
-        n = put_elem(@node_template, key_mask(key_shift(hash)), [key | value])
-        {put_elem(node, index, {k, v, n}), 1}
-
-      {^key, _, n} ->
-        {put_elem(node, index, {key, value, n}), 0}
-
-      {k, v, n} ->
-        {n, counter} = do_put(n, key, value, key_shift(hash))
-        {put_elem(node, index, {k, v, n}), counter}
-    end
-  end
-
-  defp do_update(node, key, initial, fun, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] ->
-        {put_elem(node, index, [key | initial.()]), 1}
-
-      [^key | value] ->
-        {put_elem(node, index, [key | fun.(value)]), 0}
-
-      [k | v] ->
-        n = put_elem(@node_template, key_mask(key_shift(hash)), [key | initial.()])
-        {put_elem(node, index, {k, v, n}), 1}
-
-      {^key, value, n} ->
-        {put_elem(node, index, {key, fun.(value), n}), 0}
-
-      {k, v, n} ->
-        {n, counter} = do_update(n, key, initial, fun, key_shift(hash))
-        {put_elem(node, index, {k, v, n}), counter}
-    end
-  end
-
-  defp do_delete(node, key, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] ->
-        :error
-
-      [^key | value] ->
-        {put_elem(node, index, []), value}
-
-      [_ | _] ->
-        :error
-
-      {^key, value, n} ->
-        {put_elem(node, index, do_compact_node(n)), value}
-
-      {k, v, n} ->
-        case do_delete(n, key, key_shift(hash)) do
-          {@node_template, value} ->
-            {put_elem(node, index, [k | v]), value}
-
-          {n, value} ->
-            {put_elem(node, index, {k, v, n}), value}
-
-          :error ->
-            :error
-        end
-    end
-  end
-
-  Enum.each(0..(@node_size - 1), fn index ->
-    defp do_compact_node(node) when elem(node, unquote(index)) != [] do
-      case elem(node, unquote(index)) do
-        [k | v] ->
-          case put_elem(node, unquote(index), []) do
-            @node_template -> [k | v]
-            n -> {k, v, n}
-          end
-
-        {k, v, n} ->
-          {k, v, put_elem(node, unquote(index), do_compact_node(n))}
-      end
-    end
-  end)
-
-  ## Dict reduce
-
-  defp do_reduce_each(_node, {:halt, acc}, _fun, _next) do
-    {:halted, acc}
-  end
-
-  defp do_reduce_each(node, {:suspend, acc}, fun, next) do
-    {:suspended, acc, &do_reduce_each(node, &1, fun, next)}
-  end
-
-  defp do_reduce_each([], acc, _fun, next) do
-    next.(acc)
-  end
-
-  defp do_reduce_each([k | v], {:cont, acc}, fun, next) do
-    next.(fun.({k, v}, acc))
-  end
-
-  defp do_reduce_each({k, v, n}, {:cont, acc}, fun, next) do
-    do_reduce(n, fun.({k, v}, acc), fun, @node_size, next)
-  end
-
-  defp do_reduce(node, acc, fun, count, next) when count > 0 do
-    do_reduce_each(
-      :erlang.element(count, node),
-      acc,
-      fun,
-      &do_reduce(node, &1, fun, count - 1, next)
-    )
-  end
-
-  defp do_reduce(_node, acc, _fun, 0, next) do
-    next.(acc)
-  end
-
-  ## Key operations
-
-  import Bitwise
-
-  defp key_hash(key) do
-    :erlang.phash2(key)
-  end
-
-  defp key_mask(hash) do
-    hash &&& @node_bitmap
-  end
-
-  defp key_shift(hash) do
-    hash >>> @node_shift
-  end
-end
-
-defimpl Enumerable, for: HashDict do
-  def reduce(dict, acc, fun) do
-    # Avoid warnings about HashDict being deprecated.
-    module = HashDict
-    module.reduce(dict, acc, fun)
-  end
-
-  def member?(dict, {key, value}) do
-    # Avoid warnings about HashDict being deprecated.
-    module = HashDict
-    {:ok, match?({:ok, ^value}, module.fetch(dict, key))}
-  end
-
-  def member?(_dict, _) do
-    {:ok, false}
-  end
-
-  def count(dict) do
-    # Avoid warnings about HashDict being deprecated.
-    module = HashDict
-    {:ok, module.size(dict)}
-  end
-
-  def slice(_dict) do
-    {:error, __MODULE__}
-  end
-end
-
-defimpl Collectable, for: HashDict do
-  def into(original) do
-    # Avoid warnings about HashDict being deprecated.
-    module = HashDict
-
-    collector_fun = fn
-      dict, {:cont, {key, value}} -> module.put(dict, key, value)
-      dict, :done -> dict
-      _, :halt -> :ok
-    end
-
-    {original, collector_fun}
-  end
-end
-
-defimpl Inspect, for: HashDict do
-  import Inspect.Algebra
-
-  def inspect(dict, opts) do
-    # Avoid warnings about HashDict being deprecated.
-    module = HashDict
-    concat(["#HashDict<", Inspect.List.inspect(module.to_list(dict), opts), ">"])
-  end
-end

lib/elixir/lib/hash_set.ex

@@ -1,319 +0,0 @@
-defmodule HashSet do
-  @moduledoc """
-  Tuple-based HashSet implementation.
-
-  This module is deprecated. Use the `MapSet` module instead.
-  """
-
-  @moduledoc deprecated: "Use MapSet instead"
-
-  @node_bitmap 0b111
-  @node_shift 3
-  @node_size 8
-  @node_template :erlang.make_tuple(@node_size, [])
-
-  message = "Use the MapSet module instead"
-
-  @opaque t :: %__MODULE__{size: non_neg_integer, root: term}
-  @doc false
-  defstruct size: 0, root: @node_template
-
-  # Inline common instructions
-  @compile :inline_list_funcs
-  @compile {:inline, key_hash: 1, key_mask: 1, key_shift: 1}
-
-  @deprecated message
-  @spec new :: Set.t()
-  def new do
-    %HashSet{}
-  end
-
-  @deprecated message
-  def union(%HashSet{size: size1} = set1, %HashSet{size: size2} = set2) when size1 <= size2 do
-    set_fold(set1, set2, fn v, acc -> put(acc, v) end)
-  end
-
-  @deprecated message
-  def union(%HashSet{} = set1, %HashSet{} = set2) do
-    set_fold(set2, set1, fn v, acc -> put(acc, v) end)
-  end
-
-  @deprecated message
-  def intersection(%HashSet{} = set1, %HashSet{} = set2) do
-    set_fold(set1, %HashSet{}, fn v, acc ->
-      if member?(set2, v), do: put(acc, v), else: acc
-    end)
-  end
-
-  @deprecated message
-  def difference(%HashSet{} = set1, %HashSet{} = set2) do
-    set_fold(set2, set1, fn v, acc -> delete(acc, v) end)
-  end
-
-  @deprecated message
-  def to_list(set) do
-    set_fold(set, [], &[&1 | &2]) |> :lists.reverse()
-  end
-
-  @deprecated message
-  def equal?(%HashSet{size: size1} = set1, %HashSet{size: size2} = set2) do
-    case size1 do
-      ^size2 -> subset?(set1, set2)
-      _ -> false
-    end
-  end
-
-  @deprecated message
-  def subset?(%HashSet{} = set1, %HashSet{} = set2) do
-    reduce(set1, {:cont, true}, fn member, acc ->
-      case member?(set2, member) do
-        true -> {:cont, acc}
-        _ -> {:halt, false}
-      end
-    end)
-    |> elem(1)
-  end
-
-  @deprecated message
-  def disjoint?(%HashSet{} = set1, %HashSet{} = set2) do
-    reduce(set2, {:cont, true}, fn member, acc ->
-      case member?(set1, member) do
-        false -> {:cont, acc}
-        _ -> {:halt, false}
-      end
-    end)
-    |> elem(1)
-  end
-
-  @deprecated message
-  def member?(%HashSet{root: root}, term) do
-    do_member?(root, term, key_hash(term))
-  end
-
-  @deprecated message
-  def put(%HashSet{root: root, size: size}, term) do
-    {root, counter} = do_put(root, term, key_hash(term))
-    %HashSet{root: root, size: size + counter}
-  end
-
-  @deprecated message
-  def delete(%HashSet{root: root, size: size} = set, term) do
-    case do_delete(root, term, key_hash(term)) do
-      {:ok, root} -> %HashSet{root: root, size: size - 1}
-      :error -> set
-    end
-  end
-
-  @doc false
-  def reduce(%HashSet{root: root}, acc, fun) do
-    do_reduce(root, acc, fun, @node_size, fn
-      {:suspend, acc} -> {:suspended, acc, &{:done, elem(&1, 1)}}
-      {:halt, acc} -> {:halted, acc}
-      {:cont, acc} -> {:done, acc}
-    end)
-  end
-
-  @deprecated message
-  def size(%HashSet{size: size}) do
-    size
-  end
-
-  ## Set helpers
-
-  defp set_fold(%HashSet{root: root}, acc, fun) do
-    do_fold(root, acc, fun, @node_size)
-  end
-
-  ## Set manipulation
-
-  defp do_member?(node, term, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] -> false
-      [^term | _] -> true
-      [_] -> false
-      [_ | n] -> do_member?(n, term, key_shift(hash))
-    end
-  end
-
-  defp do_put(node, term, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] ->
-        {put_elem(node, index, [term]), 1}
-
-      [^term | _] ->
-        {node, 0}
-
-      [t] ->
-        n = put_elem(@node_template, key_mask(key_shift(hash)), [term])
-        {put_elem(node, index, [t | n]), 1}
-
-      [t | n] ->
-        {n, counter} = do_put(n, term, key_shift(hash))
-        {put_elem(node, index, [t | n]), counter}
-    end
-  end
-
-  defp do_delete(node, term, hash) do
-    index = key_mask(hash)
-
-    case elem(node, index) do
-      [] ->
-        :error
-
-      [^term] ->
-        {:ok, put_elem(node, index, [])}
-
-      [_] ->
-        :error
-
-      [^term | n] ->
-        {:ok, put_elem(node, index, do_compact_node(n))}
-
-      [t | n] ->
-        case do_delete(n, term, key_shift(hash)) do
-          {:ok, @node_template} ->
-            {:ok, put_elem(node, index, [t])}
-
-          {:ok, n} ->
-            {:ok, put_elem(node, index, [t | n])}
-
-          :error ->
-            :error
-        end
-    end
-  end
-
-  Enum.each(0..(@node_size - 1), fn index ->
-    defp do_compact_node(node) when elem(node, unquote(index)) != [] do
-      case elem(node, unquote(index)) do
-        [t] ->
-          case put_elem(node, unquote(index), []) do
-            @node_template -> [t]
-            n -> [t | n]
-          end
-
-        [t | n] ->
-          [t | put_elem(node, unquote(index), do_compact_node(n))]
-      end
-    end
-  end)
-
-  ## Set fold
-
-  defp do_fold_each([], acc, _fun), do: acc
-  defp do_fold_each([t], acc, fun), do: fun.(t, acc)
-  defp do_fold_each([t | n], acc, fun), do: do_fold(n, fun.(t, acc), fun, @node_size)
-
-  defp do_fold(node, acc, fun, count) when count > 0 do
-    acc = do_fold_each(:erlang.element(count, node), acc, fun)
-    do_fold(node, acc, fun, count - 1)
-  end
-
-  defp do_fold(_node, acc, _fun, 0) do
-    acc
-  end
-
-  ## Set reduce
-
-  defp do_reduce_each(_node, {:halt, acc}, _fun, _next) do
-    {:halted, acc}
-  end
-
-  defp do_reduce_each(node, {:suspend, acc}, fun, next) do
-    {:suspended, acc, &do_reduce_each(node, &1, fun, next)}
-  end
-
-  defp do_reduce_each([], acc, _fun, next) do
-    next.(acc)
-  end
-
-  defp do_reduce_each([t], {:cont, acc}, fun, next) do
-    next.(fun.(t, acc))
-  end
-
-  defp do_reduce_each([t | n], {:cont, acc}, fun, next) do
-    do_reduce(n, fun.(t, acc), fun, @node_size, next)
-  end
-
-  defp do_reduce(node, acc, fun, count, next) when count > 0 do
-    do_reduce_each(
-      :erlang.element(count, node),
-      acc,
-      fun,
-      &do_reduce(node, &1, fun, count - 1, next)
-    )
-  end
-
-  defp do_reduce(_node, acc, _fun, 0, next) do
-    next.(acc)
-  end
-
-  ## Key operations
-
-  import Bitwise
-
-  defp key_hash(key) do
-    :erlang.phash2(key)
-  end
-
-  defp key_mask(hash) do
-    hash &&& @node_bitmap
-  end
-
-  defp key_shift(hash) do
-    hash >>> @node_shift
-  end
-end
-
-defimpl Enumerable, for: HashSet do
-  def reduce(set, acc, fun) do
-    # Avoid warnings about HashSet being deprecated.
-    module = HashSet
-    module.reduce(set, acc, fun)
-  end
-
-  def member?(set, term) do
-    # Avoid warnings about HashSet being deprecated.
-    module = HashSet
-    {:ok, module.member?(set, term)}
-  end
-
-  def count(set) do
-    # Avoid warnings about HashSet being deprecated.
-    module = HashSet
-    {:ok, module.size(set)}
-  end
-
-  def slice(_set) do
-    {:error, __MODULE__}
-  end
-end
-
-defimpl Collectable, for: HashSet do
-  def into(original) do
-    # Avoid warnings about HashSet being deprecated.
-    module = HashSet
-
-    collector_fun = fn
-      set, {:cont, term} -> module.put(set, term)
-      set, :done -> set
-      _, :halt -> :ok
-    end
-
-    {original, collector_fun}
-  end
-end
-
-defimpl Inspect, for: HashSet do
-  import Inspect.Algebra
-
-  def inspect(set, opts) do
-    # Avoid warnings about HashSet being deprecated.
-    module = HashSet
-    concat(["#HashSet<", Inspect.List.inspect(module.to_list(set), opts), ">"])
-  end
-end

lib/elixir/lib/inspect.ex

@@ -1,455 +0,0 @@
-import Kernel, except: [inspect: 1]
-import Inspect.Algebra
-
-alias Code.Identifier
-
-defprotocol Inspect do
-  @moduledoc """
-  The `Inspect` protocol converts an Elixir data structure into an
-  algebra document.
-
-  This documentation refers to implementing the `Inspect` protocol
-  for your own data structures. To learn more about using inspect,
-  see `Kernel.inspect/2` and `IO.inspect/2`.
-
-  The `inspect/2` function receives the entity to be inspected
-  followed by the inspecting options, represented by the struct
-  `Inspect.Opts`. Building of the algebra document is done with
-  `Inspect.Algebra`.
-
-  ## Examples
-
-  Many times, inspecting a structure can be implemented in function
-  of existing entities. For example, here is `MapSet`'s `inspect/2`
-  implementation:
-
-      defimpl Inspect, for: MapSet do
-        import Inspect.Algebra
-
-        def inspect(dict, opts) do
-          concat(["#MapSet<", to_doc(MapSet.to_list(dict), opts), ">"])
-        end
-      end
-
-  The `concat/1` function comes from `Inspect.Algebra` and it
-  concatenates algebra documents together. In the example above,
-  it is concatenating the string `"MapSet<"` (all strings are
-  valid algebra documents that keep their formatting when pretty
-  printed), the document returned by `Inspect.Algebra.to_doc/2` and the
-  other string `">"`.
-
-  Since regular strings are valid entities in an algebra document,
-  an implementation of the `Inspect` protocol may simply return a
-  string, although that will devoid it of any pretty-printing.
-
-  ## Error handling
-
-  In case there is an error while your structure is being inspected,
-  Elixir will raise an `ArgumentError` error and will automatically fall back
-  to a raw representation for printing the structure.
-
-  You can however access the underlying error by invoking the `Inspect`
-  implementation directly. For example, to test `Inspect.MapSet` above,
-  you can invoke it as:
-
-      Inspect.MapSet.inspect(MapSet.new(), %Inspect.Opts{})
-
-  ## Deriving
-
-  The `Inspect` protocol can be derived to hide certain fields from
-  structs, so they don't show up in logs, inspects and similar. This
-  is especially useful for fields containing private information.
-
-  The options `:only` and `:except` can be used with `@derive` to
-  specify which fields should and should not appear in the
-  algebra document:
-
-      defmodule User do
-        @derive {Inspect, only: [:id, :name]}
-        defstruct [:id, :name, :address]
-      end
-
-      inspect(%User{id: 1, name: "Homer", address: "742 Evergreen Terrace"})
-      #=> #User<id: 1, name: "Homer", ...>
-
-  """
-
-  # Handle structs in Any
-  @fallback_to_any true
-
-  def inspect(term, opts)
-end
-
-defimpl Inspect, for: Atom do
-  require Macro
-
-  def inspect(atom, opts) do
-    color(Identifier.inspect_as_atom(atom), color_key(atom), opts)
-  end
-
-  defp color_key(atom) when is_boolean(atom), do: :boolean
-  defp color_key(nil), do: nil
-  defp color_key(_), do: :atom
-end
-
-defimpl Inspect, for: BitString do
-  def inspect(term, opts) when is_binary(term) do
-    %Inspect.Opts{binaries: bins, base: base, printable_limit: printable_limit} = opts
-
-    if base == :decimal and
-         (bins == :as_strings or (bins == :infer and String.printable?(term, printable_limit))) do
-      inspected =
-        case Identifier.escape(term, ?", printable_limit) do
-          {escaped, ""} -> [?", escaped, ?"]
-          {escaped, _} -> [?", escaped, ?", " <> ..."]
-        end
-
-      color(IO.iodata_to_binary(inspected), :string, opts)
-    else
-      inspect_bitstring(term, opts)
-    end
-  end
-
-  def inspect(term, opts) do
-    inspect_bitstring(term, opts)
-  end
-
-  defp inspect_bitstring("", opts) do
-    color("<<>>", :binary, opts)
-  end
-
-  defp inspect_bitstring(bitstring, opts) do
-    left = color("<<", :binary, opts)
-    right = color(">>", :binary, opts)
-    inner = each_bit(bitstring, opts.limit, opts)
-    group(concat(concat(left, nest(inner, 2)), right))
-  end
-
-  defp each_bit(_, 0, _) do
-    "..."
-  end
-
-  defp each_bit(<<>>, _counter, _opts) do
-    :doc_nil
-  end
-
-  defp each_bit(<<h::8>>, _counter, opts) do
-    Inspect.Integer.inspect(h, opts)
-  end
-
-  defp each_bit(<<h, t::bitstring>>, counter, opts) do
-    flex_glue(
-      concat(Inspect.Integer.inspect(h, opts), ","),
-      each_bit(t, decrement(counter), opts)
-    )
-  end
-
-  defp each_bit(bitstring, _counter, opts) do
-    size = bit_size(bitstring)
-    <<h::size(size)>> = bitstring
-    Inspect.Integer.inspect(h, opts) <> "::size(" <> Integer.to_string(size) <> ")"
-  end
-
-  @compile {:inline, decrement: 1}
-  defp decrement(:infinity), do: :infinity
-  defp decrement(counter), do: counter - 1
-end
-
-defimpl Inspect, for: List do
-  def inspect([], opts) do
-    color("[]", :list, opts)
-  end
-
-  # TODO: Remove :char_list and :as_char_lists handling in 2.0
-  def inspect(term, opts) do
-    %Inspect.Opts{
-      charlists: lists,
-      char_lists: lists_deprecated,
-      printable_limit: printable_limit
-    } = opts
-
-    lists =
-      if lists == :infer and lists_deprecated != :infer do
-        case lists_deprecated do
-          :as_char_lists ->
-            IO.warn(
-              "the :char_lists inspect option and its :as_char_lists " <>
-                "value are deprecated, use the :charlists option and its " <>
-                ":as_charlists value instead"
-            )
-
-            :as_charlists
-
-          _ ->
-            IO.warn("the :char_lists inspect option is deprecated, use :charlists instead")
-            lists_deprecated
-        end
-      else
-        lists
-      end
-
-    open = color("[", :list, opts)
-    sep = color(",", :list, opts)
-    close = color("]", :list, opts)
-
-    cond do
-      lists == :as_charlists or (lists == :infer and List.ascii_printable?(term, printable_limit)) ->
-        inspected =
-          case Identifier.escape(IO.chardata_to_string(term), ?', printable_limit) do
-            {escaped, ""} -> [?', escaped, ?']
-            {escaped, _} -> [?', escaped, ?', " ++ ..."]
-          end
-
-        IO.iodata_to_binary(inspected)
-
-      keyword?(term) ->
-        container_doc(open, term, close, opts, &keyword/2, separator: sep, break: :strict)
-
-      true ->
-        container_doc(open, term, close, opts, &to_doc/2, separator: sep)
-    end
-  end
-
-  @doc false
-  def keyword({key, value}, opts) do
-    key = color(Identifier.inspect_as_key(key), :atom, opts)
-    concat(key, concat(" ", to_doc(value, opts)))
-  end
-
-  @doc false
-  def keyword?([{key, _value} | rest]) when is_atom(key) do
-    case Atom.to_charlist(key) do
-      'Elixir.' ++ _ -> false
-      _ -> keyword?(rest)
-    end
-  end
-
-  def keyword?([]), do: true
-  def keyword?(_other), do: false
-end
-
-defimpl Inspect, for: Tuple do
-  def inspect(tuple, opts) do
-    open = color("{", :tuple, opts)
-    sep = color(",", :tuple, opts)
-    close = color("}", :tuple, opts)
-    container_opts = [separator: sep, break: :flex]
-    container_doc(open, Tuple.to_list(tuple), close, opts, &to_doc/2, container_opts)
-  end
-end
-
-defimpl Inspect, for: Map do
-  def inspect(map, opts) do
-    inspect(map, "", opts)
-  end
-
-  def inspect(map, name, opts) do
-    map = :maps.to_list(map)
-    open = color("%" <> name <> "{", :map, opts)
-    sep = color(",", :map, opts)
-    close = color("}", :map, opts)
-    container_doc(open, map, close, opts, traverse_fun(map, opts), separator: sep, break: :strict)
-  end
-
-  defp traverse_fun(list, opts) do
-    if Inspect.List.keyword?(list) do
-      &Inspect.List.keyword/2
-    else
-      sep = color(" => ", :map, opts)
-      &to_map(&1, &2, sep)
-    end
-  end
-
-  defp to_map({key, value}, opts, sep) do
-    concat(concat(to_doc(key, opts), sep), to_doc(value, opts))
-  end
-end
-
-defimpl Inspect, for: Integer do
-  def inspect(term, %Inspect.Opts{base: base} = opts) do
-    inspected = Integer.to_string(term, base_to_value(base)) |> prepend_prefix(base)
-    color(inspected, :number, opts)
-  end
-
-  defp base_to_value(base) do
-    case base do
-      :binary -> 2
-      :decimal -> 10
-      :octal -> 8
-      :hex -> 16
-    end
-  end
-
-  defp prepend_prefix(value, :decimal), do: value
-
-  defp prepend_prefix(<<?-, value::binary>>, base) do
-    "-" <> prepend_prefix(value, base)
-  end
-
-  defp prepend_prefix(value, base) do
-    prefix =
-      case base do
-        :binary -> "0b"
-        :octal -> "0o"
-        :hex -> "0x"
-      end
-
-    prefix <> value
-  end
-end
-
-defimpl Inspect, for: Float do
-  def inspect(term, opts) do
-    inspected = IO.iodata_to_binary(:io_lib_format.fwrite_g(term))
-    color(inspected, :number, opts)
-  end
-end
-
-defimpl Inspect, for: Regex do
-  def inspect(regex, opts) do
-    {escaped, _} = Identifier.escape(regex.source, ?/, :infinity, &escape_map/1)
-    source = IO.iodata_to_binary(['~r/', escaped, ?/, regex.opts])
-    color(source, :regex, opts)
-  end
-
-  defp escape_map(?\a), do: '\\a'
-  defp escape_map(?\f), do: '\\f'
-  defp escape_map(?\n), do: '\\n'
-  defp escape_map(?\r), do: '\\r'
-  defp escape_map(?\t), do: '\\t'
-  defp escape_map(?\v), do: '\\v'
-  defp escape_map(_), do: false
-end
-
-defimpl Inspect, for: Function do
-  def inspect(function, _opts) do
-    fun_info = Function.info(function)
-    mod = fun_info[:module]
-    name = fun_info[:name]
-
-    cond do
-      fun_info[:type] == :external and fun_info[:env] == [] ->
-        inspected_as_atom = Identifier.inspect_as_atom(mod)
-        inspected_as_function = Identifier.inspect_as_function(name)
-        "&#{inspected_as_atom}.#{inspected_as_function}/#{fun_info[:arity]}"
-
-      match?('elixir_compiler_' ++ _, Atom.to_charlist(mod)) ->
-        if function_exported?(mod, :__RELATIVE__, 0) do
-          "#Function<#{uniq(fun_info)} in file:#{mod.__RELATIVE__}>"
-        else
-          default_inspect(mod, fun_info)
-        end
-
-      true ->
-        default_inspect(mod, fun_info)
-    end
-  end
-
-  defp default_inspect(mod, fun_info) do
-    inspected_as_atom = Identifier.inspect_as_atom(mod)
-    extracted_name = extract_name(fun_info[:name])
-    "#Function<#{uniq(fun_info)}/#{fun_info[:arity]} in #{inspected_as_atom}#{extracted_name}>"
-  end
-
-  defp extract_name([]) do
-    ""
-  end
-
-  defp extract_name(name) do
-    case Identifier.extract_anonymous_fun_parent(name) do
-      {name, arity} ->
-        "." <> Identifier.inspect_as_function(name) <> "/" <> arity
-
-      :error ->
-        "." <> Identifier.inspect_as_function(name)
-    end
-  end
-
-  defp uniq(fun_info) do
-    Integer.to_string(fun_info[:new_index]) <> "." <> Integer.to_string(fun_info[:uniq])
-  end
-end
-
-defimpl Inspect, for: PID do
-  def inspect(pid, _opts) do
-    "#PID" <> IO.iodata_to_binary(:erlang.pid_to_list(pid))
-  end
-end
-
-defimpl Inspect, for: Port do
-  def inspect(port, _opts) do
-    IO.iodata_to_binary(:erlang.port_to_list(port))
-  end
-end
-
-defimpl Inspect, for: Reference do
-  def inspect(ref, _opts) do
-    '#Ref' ++ rest = :erlang.ref_to_list(ref)
-    "#Reference" <> IO.iodata_to_binary(rest)
-  end
-end
-
-defimpl Inspect, for: Any do
-  defmacro __deriving__(module, struct, options) do
-    fields =
-      struct
-      |> Map.drop([:__exception__, :__struct__])
-      |> Map.keys()
-
-    only = Keyword.get(options, :only, fields)
-    except = Keyword.get(options, :except, [])
-
-    filtered_fields =
-      fields
-      |> Enum.reject(&(&1 in except))
-      |> Enum.filter(&(&1 in only))
-
-    inspect_module =
-      if fields == only and except == [] do
-        quote(do: Inspect.Map)
-      else
-        quote(do: Inspect.Any)
-      end
-
-    quote do
-      defimpl Inspect, for: unquote(module) do
-        def inspect(struct, opts) do
-          map = Map.take(struct, unquote(filtered_fields))
-          colorless_opts = %{opts | syntax_colors: []}
-          name = Inspect.Atom.inspect(unquote(module), colorless_opts)
-          unquote(inspect_module).inspect(map, name, opts)
-        end
-      end
-    end
-  end
-
-  def inspect(%module{} = struct, opts) do
-    try do
-      module.__struct__
-    rescue
-      _ -> Inspect.Map.inspect(struct, opts)
-    else
-      dunder ->
-        if :maps.keys(dunder) == :maps.keys(struct) do
-          pruned = :maps.remove(:__exception__, :maps.remove(:__struct__, struct))
-          colorless_opts = %{opts | syntax_colors: []}
-          Inspect.Map.inspect(pruned, Inspect.Atom.inspect(module, colorless_opts), opts)
-        else
-          Inspect.Map.inspect(struct, opts)
-        end
-    end
-  end
-
-  def inspect(map, name, opts) do
-    # Use the :limit option and an extra element to force
-    # `container_doc/6` to append "...".
-    opts = %{opts | limit: min(opts.limit, map_size(map))}
-    map = :maps.to_list(map) ++ ["..."]
-
-    open = color("#" <> name <> "<", :map, opts)
-    sep = color(",", :map, opts)
-    close = color(">", :map, opts)
-
-    container_doc(open, map, close, opts, &Inspect.List.keyword/2, separator: sep, break: :strict)
-  end
-end

lib/elixir/lib/integer.ex

@@ -1,421 +0,0 @@
-defmodule Integer do
-  @moduledoc """
-  Functions for working with integers.
-
-  Some functions that work on integers are found in `Kernel`:
-
-    * `abs/1`
-    * `div/2`
-    * `max/2`
-    * `min/2`
-    * `rem/2`
-
-  """
-
-  import Bitwise
-
-  @doc """
-  Determines if `integer` is odd.
-
-  Returns `true` if the given `integer` is an odd number,
-  otherwise it returns `false`.
-
-  Allowed in guard clauses.
-
-  ## Examples
-
-      iex> Integer.is_odd(5)
-      true
-
-      iex> Integer.is_odd(6)
-      false
-
-      iex> Integer.is_odd(-5)
-      true
-
-      iex> Integer.is_odd(0)
-      false
-
-  """
-  defguard is_odd(integer) when is_integer(integer) and (integer &&& 1) == 1
-
-  @doc """
-  Determines if an `integer` is even.
-
-  Returns `true` if the given `integer` is an even number,
-  otherwise it returns `false`.
-
-  Allowed in guard clauses.
-
-  ## Examples
-
-      iex> Integer.is_even(10)
-      true
-
-      iex> Integer.is_even(5)
-      false
-
-      iex> Integer.is_even(-10)
-      true
-
-      iex> Integer.is_even(0)
-      true
-
-  """
-  defguard is_even(integer) when is_integer(integer) and (integer &&& 1) == 0
-
-  @doc """
-  Computes the modulo remainder of an integer division.
-
-  `Integer.mod/2` uses floored division, which means that
-  the result will always have the sign of the `divisor`.
-
-  Raises an `ArithmeticError` exception if one of the arguments is not an
-  integer, or when the `divisor` is `0`.
-
-  ## Examples
-
-      iex> Integer.mod(5, 2)
-      1
-      iex> Integer.mod(6, -4)
-      -2
-
-  """
-  @doc since: "1.4.0"
-  @spec mod(integer, neg_integer | pos_integer) :: integer
-  def mod(dividend, divisor) do
-    remainder = rem(dividend, divisor)
-
-    if remainder * divisor < 0 do
-      remainder + divisor
-    else
-      remainder
-    end
-  end
-
-  @doc """
-  Performs a floored integer division.
-
-  Raises an `ArithmeticError` exception if one of the arguments is not an
-  integer, or when the `divisor` is `0`.
-
-  `Integer.floor_div/2` performs *floored* integer division. This means that
-  the result is always rounded towards negative infinity.
-
-  If you want to perform truncated integer division (rounding towards zero),
-  use `Kernel.div/2` instead.
-
-  ## Examples
-
-      iex> Integer.floor_div(5, 2)
-      2
-      iex> Integer.floor_div(6, -4)
-      -2
-      iex> Integer.floor_div(-99, 2)
-      -50
-
-  """
-  @doc since: "1.4.0"
-  @spec floor_div(integer, neg_integer | pos_integer) :: integer
-  def floor_div(dividend, divisor) do
-    if dividend * divisor < 0 and rem(dividend, divisor) != 0 do
-      div(dividend, divisor) - 1
-    else
-      div(dividend, divisor)
-    end
-  end
-
-  @doc """
-  Returns the ordered digits for the given `integer`.
-
-  An optional `base` value may be provided representing the radix for the returned
-  digits. This one must be an integer >= 2.
-
-  ## Examples
-
-      iex> Integer.digits(123)
-      [1, 2, 3]
-
-      iex> Integer.digits(170, 2)
-      [1, 0, 1, 0, 1, 0, 1, 0]
-
-      iex> Integer.digits(-170, 2)
-      [-1, 0, -1, 0, -1, 0, -1, 0]
-
-  """
-  @spec digits(integer, pos_integer) :: [integer, ...]
-  def digits(integer, base \\ 10)
-      when is_integer(integer) and is_integer(base) and base >= 2 do
-    do_digits(integer, base, [])
-  end
-
-  defp do_digits(integer, base, acc) when abs(integer) < base, do: [integer | acc]
-
-  defp do_digits(integer, base, acc),
-    do: do_digits(div(integer, base), base, [rem(integer, base) | acc])
-
-  @doc """
-  Returns the integer represented by the ordered `digits`.
-
-  An optional `base` value may be provided representing the radix for the `digits`.
-  Base has to be an integer greater than or equal to `2`.
-
-  ## Examples
-
-      iex> Integer.undigits([1, 2, 3])
-      123
-
-      iex> Integer.undigits([1, 4], 16)
-      20
-
-      iex> Integer.undigits([])
-      0
-
-  """
-  @spec undigits([integer], pos_integer) :: integer
-  def undigits(digits, base \\ 10) when is_list(digits) and is_integer(base) and base >= 2 do
-    do_undigits(digits, base, 0)
-  end
-
-  defp do_undigits([], _base, acc), do: acc
-
-  defp do_undigits([digit | _], base, _) when is_integer(digit) and digit >= base,
-    do: raise(ArgumentError, "invalid digit #{digit} in base #{base}")
-
-  defp do_undigits([digit | tail], base, acc) when is_integer(digit),
-    do: do_undigits(tail, base, acc * base + digit)
-
-  @doc """
-  Parses a text representation of an integer.
-
-  An optional `base` to the corresponding integer can be provided.
-  If `base` is not given, 10 will be used.
-
-  If successful, returns a tuple in the form of `{integer, remainder_of_binary}`.
-  Otherwise `:error`.
-
-  Raises an error if `base` is less than 2 or more than 36.
-
-  If you want to convert a string-formatted integer directly to an integer,
-  `String.to_integer/1` or `String.to_integer/2` can be used instead.
-
-  ## Examples
-
-      iex> Integer.parse("34")
-      {34, ""}
-
-      iex> Integer.parse("34.5")
-      {34, ".5"}
-
-      iex> Integer.parse("three")
-      :error
-
-      iex> Integer.parse("34", 10)
-      {34, ""}
-
-      iex> Integer.parse("f4", 16)
-      {244, ""}
-
-      iex> Integer.parse("Awww++", 36)
-      {509216, "++"}
-
-      iex> Integer.parse("fab", 10)
-      :error
-
-      iex> Integer.parse("a2", 38)
-      ** (ArgumentError) invalid base 38
-
-  """
-  @spec parse(binary, 2..36) :: {integer, binary} | :error
-  def parse(binary, base \\ 10)
-
-  def parse(_binary, base) when base not in 2..36 do
-    raise ArgumentError, "invalid base #{inspect(base)}"
-  end
-
-  def parse(binary, base) do
-    case count_digits(binary, base) do
-      0 ->
-        :error
-
-      count ->
-        {digits, rem} = :erlang.split_binary(binary, count)
-        {:erlang.binary_to_integer(digits, base), rem}
-    end
-  end
-
-  defp count_digits(<<sign, rest::binary>>, base) when sign in '+-' do
-    case count_digits_nosign(rest, base, 1) do
-      1 -> 0
-      count -> count
-    end
-  end
-
-  defp count_digits(<<rest::binary>>, base) do
-    count_digits_nosign(rest, base, 0)
-  end
-
-  digits = [{?0..?9, -?0}, {?A..?Z, 10 - ?A}, {?a..?z, 10 - ?a}]
-
-  for {chars, diff} <- digits,
-      char <- chars do
-    digit = char + diff
-
-    defp count_digits_nosign(<<unquote(char), rest::binary>>, base, count)
-         when base > unquote(digit) do
-      count_digits_nosign(rest, base, count + 1)
-    end
-  end
-
-  defp count_digits_nosign(<<_::binary>>, _, count), do: count
-
-  @doc """
-  Returns a binary which corresponds to the text representation
-  of `integer`.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Integer.to_string(123)
-      "123"
-
-      iex> Integer.to_string(+456)
-      "456"
-
-      iex> Integer.to_string(-789)
-      "-789"
-
-      iex> Integer.to_string(0123)
-      "123"
-
-  """
-  @spec to_string(integer) :: String.t()
-  def to_string(integer) do
-    :erlang.integer_to_binary(integer)
-  end
-
-  @doc """
-  Returns a binary which corresponds to the text representation
-  of `integer` in the given `base`.
-
-  `base` can be an integer between 2 and 36.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Integer.to_string(100, 16)
-      "64"
-
-      iex> Integer.to_string(-100, 16)
-      "-64"
-
-      iex> Integer.to_string(882_681_651, 36)
-      "ELIXIR"
-
-  """
-  @spec to_string(integer, 2..36) :: String.t()
-  def to_string(integer, base) do
-    :erlang.integer_to_binary(integer, base)
-  end
-
-  @doc """
-  Returns a charlist which corresponds to the text representation of the given `integer`.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Integer.to_charlist(123)
-      '123'
-
-      iex> Integer.to_charlist(+456)
-      '456'
-
-      iex> Integer.to_charlist(-789)
-      '-789'
-
-      iex> Integer.to_charlist(0123)
-      '123'
-
-  """
-  @spec to_charlist(integer) :: charlist
-  def to_charlist(integer) do
-    :erlang.integer_to_list(integer)
-  end
-
-  @doc """
-  Returns a charlist which corresponds to the text representation of `integer` in the given `base`.
-
-  `base` can be an integer between 2 and 36.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> Integer.to_charlist(100, 16)
-      '64'
-
-      iex> Integer.to_charlist(-100, 16)
-      '-64'
-
-      iex> Integer.to_charlist(882_681_651, 36)
-      'ELIXIR'
-
-  """
-  @spec to_charlist(integer, 2..36) :: charlist
-  def to_charlist(integer, base) do
-    :erlang.integer_to_list(integer, base)
-  end
-
-  @doc """
-  Returns the greatest common divisor of the two given integers.
-
-  The greatest common divisor (GCD) of `integer1` and `integer2` is the largest positive
-  integer that divides both `integer1` and `integer2` without leaving a remainder.
-
-  By convention, `gcd(0, 0)` returns `0`.
-
-  ## Examples
-
-      iex> Integer.gcd(2, 3)
-      1
-
-      iex> Integer.gcd(8, 12)
-      4
-
-      iex> Integer.gcd(8, -12)
-      4
-
-      iex> Integer.gcd(10, 0)
-      10
-
-      iex> Integer.gcd(7, 7)
-      7
-
-      iex> Integer.gcd(0, 0)
-      0
-
-  """
-  @doc since: "1.5.0"
-  @spec gcd(0, 0) :: 0
-  @spec gcd(integer, integer) :: pos_integer
-  def gcd(integer1, integer2) when is_integer(integer1) and is_integer(integer2) do
-    gcd_positive(abs(integer1), abs(integer2))
-  end
-
-  defp gcd_positive(0, integer2), do: integer2
-  defp gcd_positive(integer1, 0), do: integer1
-  defp gcd_positive(integer1, integer2), do: gcd_positive(integer2, rem(integer1, integer2))
-
-  # TODO: Remove by 2.0
-  @doc false
-  @deprecated "Use Integer.to_charlist/1 instead"
-  def to_char_list(integer), do: Integer.to_charlist(integer)
-
-  # TODO: Remove by 2.0
-  @doc false
-  @deprecated "Use Integer.to_charlist/2 instead"
-  def to_char_list(integer, base), do: Integer.to_charlist(integer, base)
-end

lib/elixir/lib/io.ex

@@ -1,554 +0,0 @@
-defmodule IO do
-  @moduledoc """
-  Functions handling input/output (IO).
-
-  Many functions in this module expect an IO device as an argument.
-  An IO device must be a PID or an atom representing a process.
-  For convenience, Elixir provides `:stdio` and `:stderr` as
-  shortcuts to Erlang's `:standard_io` and `:standard_error`.
-
-  The majority of the functions expect chardata, i.e. strings or
-  lists of characters and strings. In case another type is given,
-  functions will convert to string via the `String.Chars` protocol
-  (as shown in typespecs).
-
-  The functions starting with `bin` expect iodata as an argument,
-  i.e. binaries or lists of bytes and binaries.
-
-  ## IO devices
-
-  An IO device may be an atom or a PID. In case it is an atom,
-  the atom must be the name of a registered process. In addition,
-  Elixir provides two shortcuts:
-
-    * `:stdio` - a shortcut for `:standard_io`, which maps to
-      the current `Process.group_leader/0` in Erlang
-
-    * `:stderr` - a shortcut for the named process `:standard_error`
-      provided in Erlang
-
-  IO devices maintain their position, which means subsequent calls to any
-  reading or writing functions will start from the place where the device
-  was last accessed. The position of files can be changed using the
-  `:file.position/2` function.
-
-  """
-
-  @type device :: atom | pid
-  @type nodata :: {:error, term} | :eof
-  @type chardata :: String.t() | maybe_improper_list(char | chardata, String.t() | [])
-
-  defmacrop is_iodata(data) do
-    quote do
-      is_list(unquote(data)) or is_binary(unquote(data))
-    end
-  end
-
-  @doc """
-  Reads from the IO `device`.
-
-  The `device` is iterated by the given number of characters or line by line if
-  `:line` is given.
-  Alternatively, if `:all` is given, then whole `device` is returned.
-
-  It returns:
-
-    * `data` - the output characters
-
-    * `:eof` - end of file was encountered
-
-    * `{:error, reason}` - other (rare) error condition;
-      for instance, `{:error, :estale}` if reading from an
-      NFS volume
-
-  If `:all` is given, `:eof` is never returned, but an
-  empty string in case the device has reached EOF.
-  """
-  @spec read(device, :all | :line | non_neg_integer) :: chardata | nodata
-  def read(device \\ :stdio, line_or_chars)
-
-  def read(device, :all) do
-    do_read_all(map_dev(device), "")
-  end
-
-  def read(device, :line) do
-    :io.get_line(map_dev(device), '')
-  end
-
-  def read(device, count) when is_integer(count) and count >= 0 do
-    :io.get_chars(map_dev(device), '', count)
-  end
-
-  defp do_read_all(mapped_dev, acc) do
-    case :io.get_line(mapped_dev, "") do
-      line when is_binary(line) -> do_read_all(mapped_dev, acc <> line)
-      :eof -> acc
-      other -> other
-    end
-  end
-
-  @doc """
-  Reads from the IO `device`. The operation is Unicode unsafe.
-
-  The `device` is iterated by the given number of bytes or line by line if
-  `:line` is given.
-  Alternatively, if `:all` is given, then whole `device` is returned.
-
-  It returns:
-
-    * `data` - the output bytes
-
-    * `:eof` - end of file was encountered
-
-    * `{:error, reason}` - other (rare) error condition;
-      for instance, `{:error, :estale}` if reading from an
-      NFS volume
-
-  If `:all` is given, `:eof` is never returned, but an
-  empty string in case the device has reached EOF.
-
-  Note: do not use this function on IO devices in Unicode mode
-  as it will return the wrong result.
-  """
-  @spec binread(device, :all | :line | non_neg_integer) :: iodata | nodata
-  def binread(device \\ :stdio, line_or_chars)
-
-  def binread(device, :all) do
-    do_binread_all(map_dev(device), "")
-  end
-
-  def binread(device, :line) do
-    case :file.read_line(map_dev(device)) do
-      {:ok, data} -> data
-      other -> other
-    end
-  end
-
-  def binread(device, count) when is_integer(count) and count >= 0 do
-    case :file.read(map_dev(device), count) do
-      {:ok, data} -> data
-      other -> other
-    end
-  end
-
-  @read_all_size 4096
-  defp do_binread_all(mapped_dev, acc) do
-    case :file.read(mapped_dev, @read_all_size) do
-      {:ok, data} -> do_binread_all(mapped_dev, acc <> data)
-      :eof -> acc
-      other -> other
-    end
-  end
-
-  @doc """
-  Writes `item` to the given `device`.
-
-  By default, the `device` is the standard output.
-
-  ## Examples
-
-      IO.write("sample")
-      #=> sample
-
-      IO.write(:stderr, "error")
-      #=> error
-
-  """
-  @spec write(device, chardata | String.Chars.t()) :: :ok
-  def write(device \\ :stdio, item) do
-    :io.put_chars(map_dev(device), to_chardata(item))
-  end
-
-  @doc """
-  Writes `item` as a binary to the given `device`.
-  No Unicode conversion happens.
-  The operation is Unicode unsafe.
-
-  Check `write/2` for more information.
-
-  Note: do not use this function on IO devices in Unicode mode
-  as it will return the wrong result.
-  """
-  @spec binwrite(device, iodata) :: :ok | {:error, term}
-  def binwrite(device \\ :stdio, item) when is_iodata(item) do
-    :file.write(map_dev(device), item)
-  end
-
-  @doc """
-  Writes `item` to the given `device`, similar to `write/2`,
-  but adds a newline at the end.
-
-  By default, the `device` is the standard output. It returns `:ok`
-  if it succeeds.
-
-  ## Examples
-
-      IO.puts("Hello World!")
-      #=> Hello World!
-
-      IO.puts(:stderr, "error")
-      #=> error
-
-  """
-  @spec puts(device, chardata | String.Chars.t()) :: :ok
-  def puts(device \\ :stdio, item) do
-    :io.put_chars(map_dev(device), [to_chardata(item), ?\n])
-  end
-
-  @doc """
-  Writes a `message` to stderr, along with the given `stacktrace`.
-
-  This function also notifies the compiler a warning was printed
-  (in case --warnings-as-errors was enabled). It returns `:ok`
-  if it succeeds.
-
-  An empty list can be passed to avoid stacktrace printing.
-
-  ## Examples
-
-      stacktrace = [{MyApp, :main, 1, [file: 'my_app.ex', line: 4]}]
-      IO.warn("variable bar is unused", stacktrace)
-      #=> warning: variable bar is unused
-      #=>   my_app.ex:4: MyApp.main/1
-
-  """
-  @spec warn(chardata | String.Chars.t(), Exception.stacktrace()) :: :ok
-  def warn(message, []) do
-    :elixir_errors.bare_warn(nil, nil, [to_chardata(message), ?\n])
-  end
-
-  def warn(message, [{_, _, _, opts} | _] = stacktrace) do
-    formatted_trace = Enum.map_join(stacktrace, "\n  ", &Exception.format_stacktrace_entry(&1))
-    message = [to_chardata(message), ?\n, "  ", formatted_trace, ?\n]
-    line = opts[:line]
-    file = opts[:file]
-    :elixir_errors.bare_warn(line, file && List.to_string(file), message)
-  end
-
-  @doc """
-  Writes a `message` to stderr, along with the current stacktrace.
-
-  It returns `:ok` if it succeeds.
-
-  ## Examples
-
-      IO.warn("variable bar is unused")
-      #=> warning: variable bar is unused
-      #=>   (iex) evaluator.ex:108: IEx.Evaluator.eval/4
-
-  """
-  @spec warn(chardata | String.Chars.t()) :: :ok
-  def warn(message) do
-    {:current_stacktrace, stacktrace} = Process.info(self(), :current_stacktrace)
-    warn(message, Enum.drop(stacktrace, 2))
-  end
-
-  @doc """
-  Inspects and writes the given `item` to the device.
-
-  It's important to note that it returns the given `item` unchanged.
-  This makes it possible to "spy" on values by inserting an
-  `IO.inspect/2` call almost anywhere in your code, for example,
-  in the middle of a pipeline.
-
-  It enables pretty printing by default with width of
-  80 characters. The width can be changed by explicitly
-  passing the `:width` option.
-
-  The output can be decorated with a label, by providing the `:label`
-  option to easily distinguish it from other `IO.inspect/2` calls.
-  The label will be printed before the inspected `item`.
-
-  See `Inspect.Opts` for a full list of remaining formatting options.
-
-  ## Examples
-
-      IO.inspect(<<0, 1, 2>>, width: 40)
-
-  Prints:
-
-      <<0, 1, 2>>
-
-  We can use the `:label` option to decorate the output:
-
-      IO.inspect(1..100, label: "a wonderful range")
-
-  Prints:
-
-      a wonderful range: 1..100
-
-  The `:label` option is especially useful with pipelines:
-
-      [1, 2, 3]
-      |> IO.inspect(label: "before")
-      |> Enum.map(&(&1 * 2))
-      |> IO.inspect(label: "after")
-      |> Enum.sum()
-
-  Prints:
-
-      before: [1, 2, 3]
-      after: [2, 4, 6]
-
-  """
-  @spec inspect(item, keyword) :: item when item: var
-  def inspect(item, opts \\ []) do
-    inspect(:stdio, item, opts)
-  end
-
-  @doc """
-  Inspects `item` according to the given options using the IO `device`.
-
-  See `inspect/2` for a full list of options.
-  """
-  @spec inspect(device, item, keyword) :: item when item: var
-  def inspect(device, item, opts) when is_list(opts) do
-    label = if label = opts[:label], do: [to_chardata(label), ": "], else: []
-    opts = struct(Inspect.Opts, opts)
-    doc = Inspect.Algebra.group(Inspect.Algebra.to_doc(item, opts))
-    chardata = Inspect.Algebra.format(doc, opts.width)
-    puts(device, [label, chardata])
-    item
-  end
-
-  @doc """
-  Gets a number of bytes from IO device `:stdio`.
-
-  If `:stdio` is a Unicode device, `count` implies
-  the number of Unicode codepoints to be retrieved.
-  Otherwise, `count` is the number of raw bytes to be retrieved.
-
-  See `IO.getn/3` for a description of return values.
-
-  """
-  @spec getn(chardata | String.Chars.t(), pos_integer) :: chardata | nodata
-  @spec getn(device, chardata | String.Chars.t()) :: chardata | nodata
-  def getn(prompt, count \\ 1)
-
-  def getn(prompt, count) when is_integer(count) and count > 0 do
-    getn(:stdio, prompt, count)
-  end
-
-  def getn(device, prompt) when not is_integer(prompt) do
-    getn(device, prompt, 1)
-  end
-
-  @doc """
-  Gets a number of bytes from the IO `device`.
-
-  If the IO `device` is a Unicode device, `count` implies
-  the number of Unicode codepoints to be retrieved.
-  Otherwise, `count` is the number of raw bytes to be retrieved.
-
-  It returns:
-
-    * `data` - the input characters
-
-    * `:eof` - end of file was encountered
-
-    * `{:error, reason}` - other (rare) error condition;
-      for instance, `{:error, :estale}` if reading from an
-      NFS volume
-
-  """
-  @spec getn(device, chardata | String.Chars.t(), pos_integer) :: chardata | nodata
-  def getn(device, prompt, count) when is_integer(count) and count > 0 do
-    :io.get_chars(map_dev(device), to_chardata(prompt), count)
-  end
-
-  @doc ~S"""
-  Reads a line from the IO `device`.
-
-  It returns:
-
-    * `data` - the characters in the line terminated
-      by a line-feed (LF) or end of file (EOF)
-
-    * `:eof` - end of file was encountered
-
-    * `{:error, reason}` - other (rare) error condition;
-      for instance, `{:error, :estale}` if reading from an
-      NFS volume
-
-  ## Examples
-
-  To display "What is your name?" as a prompt and await user input:
-
-      IO.gets("What is your name?\n")
-
-  """
-  @spec gets(device, chardata | String.Chars.t()) :: chardata | nodata
-  def gets(device \\ :stdio, prompt) do
-    :io.get_line(map_dev(device), to_chardata(prompt))
-  end
-
-  @doc """
-  Converts the IO `device` into an `IO.Stream`.
-
-  An `IO.Stream` implements both `Enumerable` and
-  `Collectable`, allowing it to be used for both read
-  and write.
-
-  The `device` is iterated by the given number of characters or line by line if
-  `:line` is given.
-
-  This reads from the IO as UTF-8. Check out
-  `IO.binstream/2` to handle the IO as a raw binary.
-
-  Note that an IO stream has side effects and every time
-  you go over the stream you may get different results.
-
-  ## Examples
-
-  Here is an example on how we mimic an echo server
-  from the command line:
-
-      Enum.each(IO.stream(:stdio, :line), &IO.write(&1))
-
-  """
-  @spec stream(device, :line | pos_integer) :: Enumerable.t()
-  def stream(device, line_or_codepoints)
-      when line_or_codepoints == :line
-      when is_integer(line_or_codepoints) and line_or_codepoints > 0 do
-    IO.Stream.__build__(map_dev(device), false, line_or_codepoints)
-  end
-
-  @doc """
-  Converts the IO `device` into an `IO.Stream`. The operation is Unicode unsafe.
-
-  An `IO.Stream` implements both `Enumerable` and
-  `Collectable`, allowing it to be used for both read
-  and write.
-
-  The `device` is iterated by the given number of bytes or line by line if
-  `:line` is given.
-  This reads from the IO device as a raw binary.
-
-  Note that an IO stream has side effects and every time
-  you go over the stream you may get different results.
-
-  Finally, do not use this function on IO devices in Unicode
-  mode as it will return the wrong result.
-
-  """
-  @spec binstream(device, :line | pos_integer) :: Enumerable.t()
-  def binstream(device, line_or_bytes)
-      when line_or_bytes == :line
-      when is_integer(line_or_bytes) and line_or_bytes > 0 do
-    IO.Stream.__build__(map_dev(device), true, line_or_bytes)
-  end
-
-  @doc """
-  Converts chardata (a list of integers representing codepoints,
-  lists and strings) into a string.
-
-  In case the conversion fails, it raises an `UnicodeConversionError`.
-  If a string is given, it returns the string itself.
-
-  ## Examples
-
-      iex> IO.chardata_to_string([0x00E6, 0x00DF])
-      "æß"
-
-      iex> IO.chardata_to_string([0x0061, "bc"])
-      "abc"
-
-      iex> IO.chardata_to_string("string")
-      "string"
-
-  """
-  @spec chardata_to_string(chardata) :: String.t()
-  def chardata_to_string(string) when is_binary(string) do
-    string
-  end
-
-  def chardata_to_string(list) when is_list(list) do
-    List.to_string(list)
-  end
-
-  @doc """
-  Converts iodata (a list of integers representing bytes, lists
-  and binaries) into a binary.
-  The operation is Unicode unsafe.
-
-  Notice that this function treats lists of integers as raw bytes
-  and does not perform any kind of encoding conversion. If you want
-  to convert from a charlist to a string (UTF-8 encoded), please
-  use `chardata_to_string/1` instead.
-
-  If this function receives a binary, the same binary is returned.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> bin1 = <<1, 2, 3>>
-      iex> bin2 = <<4, 5>>
-      iex> bin3 = <<6>>
-      iex> IO.iodata_to_binary([bin1, 1, [2, 3, bin2], 4 | bin3])
-      <<1, 2, 3, 1, 2, 3, 4, 5, 4, 6>>
-
-      iex> bin = <<1, 2, 3>>
-      iex> IO.iodata_to_binary(bin)
-      <<1, 2, 3>>
-
-  """
-  @spec iodata_to_binary(iodata) :: binary
-  def iodata_to_binary(item) do
-    :erlang.iolist_to_binary(item)
-  end
-
-  @doc """
-  Returns the size of an iodata.
-
-  Inlined by the compiler.
-
-  ## Examples
-
-      iex> IO.iodata_length([1, 2 | <<3, 4>>])
-      4
-
-  """
-  @spec iodata_length(iodata) :: non_neg_integer
-  def iodata_length(item) do
-    :erlang.iolist_size(item)
-  end
-
-  @doc false
-  def each_stream(device, line_or_codepoints) do
-    case read(device, line_or_codepoints) do
-      :eof ->
-        {:halt, device}
-
-      {:error, reason} ->
-        raise IO.StreamError, reason: reason
-
-      data ->
-        {[data], device}
-    end
-  end
-
-  @doc false
-  def each_binstream(device, line_or_chars) do
-    case binread(device, line_or_chars) do
-      :eof ->
-        {:halt, device}
-
-      {:error, reason} ->
-        raise IO.StreamError, reason: reason
-
-      data ->
-        {[data], device}
-    end
-  end
-
-  @compile {:inline, map_dev: 1, to_chardata: 1}
-
-  # Map the Elixir names for standard IO and error to Erlang names
-  defp map_dev(:stdio), do: :standard_io
-  defp map_dev(:stderr), do: :standard_error
-  defp map_dev(other) when is_atom(other) or is_pid(other) or is_tuple(other), do: other
-
-  defp to_chardata(list) when is_list(list), do: list
-  defp to_chardata(other), do: to_string(other)
-end

lib/elixir/lib/io/ansi.ex

@@ -1,280 +0,0 @@
-defmodule IO.ANSI.Sequence do
-  @moduledoc false
-
-  defmacro defsequence(name, code, terminator \\ "m") do
-    quote bind_quoted: [name: name, code: code, terminator: terminator] do
-      def unquote(name)() do
-        "\e[#{unquote(code)}#{unquote(terminator)}"
-      end
-
-      defp format_sequence(unquote(name)) do
-        unquote(name)()
-      end
-    end
-  end
-end
-
-defmodule IO.ANSI do
-  @moduledoc """
-  Functionality to render ANSI escape sequences.
-
-  [ANSI escape sequences](https://en.wikipedia.org/wiki/ANSI_escape_code)
-  are characters embedded in text used to control formatting, color, and
-  other output options on video text terminals.
-  """
-
-  import IO.ANSI.Sequence
-
-  @type ansicode :: atom
-  @type ansilist ::
-          maybe_improper_list(char | ansicode | binary | ansilist, binary | ansicode | [])
-  @type ansidata :: ansilist | ansicode | binary
-
-  @doc """
-  Checks if ANSI coloring is supported and enabled on this machine.
-
-  This function simply reads the configuration value for
-  `:ansi_enabled` in the `:elixir` application. The value is by
-  default `false` unless Elixir can detect during startup that
-  both `stdout` and `stderr` are terminals.
-  """
-  @spec enabled? :: boolean
-  def enabled? do
-    Application.get_env(:elixir, :ansi_enabled, false)
-  end
-
-  @doc "Sets foreground color."
-  @spec color(0..255) :: String.t()
-  def color(code) when code in 0..255, do: "\e[38;5;#{code}m"
-
-  @doc ~S"""
-  Sets the foreground color from individual RGB values.
-
-  Valid values for each color are in the range 0 to 5.
-  """
-  @spec color(0..5, 0..5, 0..5) :: String.t()
-  def color(r, g, b) when r in 0..5 and g in 0..5 and b in 0..5 do
-    color(16 + 36 * r + 6 * g + b)
-  end
-
-  @doc "Sets background color."
-  @spec color_background(0..255) :: String.t()
-  def color_background(code) when code in 0..255, do: "\e[48;5;#{code}m"
-
-  @doc ~S"""
-  Sets the background color from individual RGB values.
-
-  Valid values for each color are in the range 0 to 5.
-  """
-  @spec color_background(0..5, 0..5, 0..5) :: String.t()
-  def color_background(r, g, b) when r in 0..5 and g in 0..5 and b in 0..5 do
-    color_background(16 + 36 * r + 6 * g + b)
-  end
-
-  @doc "Resets all attributes."
-  defsequence(:reset, 0)
-
-  @doc "Bright (increased intensity) or bold."
-  defsequence(:bright, 1)
-
-  @doc "Faint (decreased intensity). Not widely supported."
-  defsequence(:faint, 2)
-
-  @doc "Italic: on. Not widely supported. Sometimes treated as inverse."
-  defsequence(:italic, 3)
-
-  @doc "Underline: single."
-  defsequence(:underline, 4)
-
-  @doc "Blink: slow. Less than 150 per minute."
-  defsequence(:blink_slow, 5)
-
-  @doc "Blink: rapid. MS-DOS ANSI.SYS; 150 per minute or more; not widely supported."
-  defsequence(:blink_rapid, 6)
-
-  @doc "Image: negative. Swap foreground and background."
-  defsequence(:inverse, 7)
-
-  @doc "Image: negative. Swap foreground and background."
-  defsequence(:reverse, 7)
-
-  @doc "Conceal. Not widely supported."
-  defsequence(:conceal, 8)
-
-  @doc "Crossed-out. Characters legible, but marked for deletion. Not widely supported."
-  defsequence(:crossed_out, 9)
-
-  @doc "Sets primary (default) font."
-  defsequence(:primary_font, 10)
-
-  for font_n <- [1, 2, 3, 4, 5, 6, 7, 8, 9] do
-    @doc "Sets alternative font #{font_n}."
-    defsequence(:"font_#{font_n}", font_n + 10)
-  end
-
-  @doc "Normal color or intensity."
-  defsequence(:normal, 22)
-
-  @doc "Not italic."
-  defsequence(:not_italic, 23)
-
-  @doc "Underline: none."
-  defsequence(:no_underline, 24)
-
-  @doc "Blink: off."
-  defsequence(:blink_off, 25)
-
-  @doc "Image: positive. Normal foreground and background."
-  defsequence(:inverse_off, 27)
-
-  @doc "Image: positive. Normal foreground and background."
-  defsequence(:reverse_off, 27)
-
-  colors = [:black, :red, :green, :yellow, :blue, :magenta, :cyan, :white]
-
-  for {color, code} <- Enum.with_index(colors) do
-    @doc "Sets foreground color to #{color}."
-    defsequence(color, code + 30)
-
-    @doc "Sets foreground color to light #{color}."
-    defsequence(:"light_#{color}", code + 90)
-
-    @doc "Sets background color to #{color}."
-    defsequence(:"#{color}_background", code + 40)
-
-    @doc "Sets background color to light #{color}."
-    defsequence(:"light_#{color}_background", code + 100)
-  end
-
-  @doc "Default text color."
-  defsequence(:default_color, 39)
-
-  @doc "Default background color."
-  defsequence(:default_background, 49)
-
-  @doc "Framed."
-  defsequence(:framed, 51)
-
-  @doc "Encircled."
-  defsequence(:encircled, 52)
-
-  @doc "Overlined."
-  defsequence(:overlined, 53)
-
-  @doc "Not framed or encircled."
-  defsequence(:not_framed_encircled, 54)
-
-  @doc "Not overlined."
-  defsequence(:not_overlined, 55)
-
-  @doc "Sends cursor home."
-  defsequence(:home, "", "H")
-
-  @doc """
-  Sends cursor to the absolute position specified by `line` and `column`.
-
-  Line `0` and column `0` would mean the top left corner.
-  """
-  @spec cursor(non_neg_integer, non_neg_integer) :: String.t()
-  def cursor(line, column)
-      when is_integer(line) and line >= 0 and is_integer(column) and column >= 0 do
-    "\e[#{line};#{column}H"
-  end
-
-  @doc "Sends cursor `lines` up."
-  @spec cursor_up(pos_integer) :: String.t()
-  def cursor_up(lines \\ 1) when is_integer(lines) and lines >= 1, do: "\e[#{lines}A"
-
-  @doc "Sends cursor `lines` down."
-  @spec cursor_down(pos_integer) :: String.t()
-  def cursor_down(lines \\ 1) when is_integer(lines) and lines >= 1, do: "\e[#{lines}B"
-
-  @doc "Sends cursor `columns` to the right."
-  @spec cursor_right(pos_integer) :: String.t()
-  def cursor_right(columns \\ 1) when is_integer(columns) and columns >= 1, do: "\e[#{columns}C"
-
-  @doc "Sends cursor `columns` to the left."
-  @spec cursor_left(pos_integer) :: String.t()
-  def cursor_left(columns \\ 1) when is_integer(columns) and columns >= 1, do: "\e[#{columns}D"
-
-  @doc "Clears screen."
-  defsequence(:clear, "2", "J")
-
-  @doc "Clears line."
-  defsequence(:clear_line, "2", "K")
-
-  defp format_sequence(other) do
-    raise ArgumentError, "invalid ANSI sequence specification: #{inspect(other)}"
-  end
-
-  @doc ~S"""
-  Formats a chardata-like argument by converting named ANSI sequences into actual
-  ANSI codes.
-
-  The named sequences are represented by atoms.
-
-  It will also append an `IO.ANSI.reset/0` to the chardata when a conversion is
-  performed. If you don't want this behaviour, use `format_fragment/2`.
-
-  An optional boolean parameter can be passed to enable or disable
-  emitting actual ANSI codes. When `false`, no ANSI codes will emitted.
-  By default checks if ANSI is enabled using the `enabled?/0` function.
-
-  ## Examples
-
-      iex> IO.ANSI.format(["Hello, ", :red, :bright, "world!"], true)
-      [[[[[[], "Hello, "] | "\e[31m"] | "\e[1m"], "world!"] | "\e[0m"]
-
-  """
-  def format(chardata, emit? \\ enabled?()) when is_boolean(emit?) do
-    do_format(chardata, [], [], emit?, :maybe)
-  end
-
-  @doc ~S"""
-  Formats a chardata-like argument by converting named ANSI sequences into actual
-  ANSI codes.
-
-  The named sequences are represented by atoms.
-
-  An optional boolean parameter can be passed to enable or disable
-  emitting actual ANSI codes. When `false`, no ANSI codes will emitted.
-  By default checks if ANSI is enabled using the `enabled?/0` function.
-
-  ## Examples
-
-      iex> IO.ANSI.format_fragment([:bright, 'Word'], true)
-      [[[[[[] | "\e[1m"], 87], 111], 114], 100]
-
-  """
-  def format_fragment(chardata, emit? \\ enabled?()) when is_boolean(emit?) do
-    do_format(chardata, [], [], emit?, false)
-  end
-
-  defp do_format([term | rest], rem, acc, emit?, append_reset) do
-    do_format(term, [rest | rem], acc, emit?, append_reset)
-  end
-
-  defp do_format(term, rem, acc, true, append_reset) when is_atom(term) do
-    do_format([], rem, [acc | format_sequence(term)], true, !!append_reset)
-  end
-
-  defp do_format(term, rem, acc, false, append_reset) when is_atom(term) do
-    do_format([], rem, acc, false, append_reset)
-  end
-
-  defp do_format(term, rem, acc, emit?, append_reset) when not is_list(term) do
-    do_format([], rem, [acc, term], emit?, append_reset)
-  end
-
-  defp do_format([], [next | rest], acc, emit?, append_reset) do
-    do_format(next, rest, acc, emit?, append_reset)
-  end
-
-  defp do_format([], [], acc, true, true) do
-    [acc | IO.ANSI.reset()]
-  end
-
-  defp do_format([], [], acc, _emit?, _append_reset) do
-    acc
-  end
-end

lib/elixir/lib/io/ansi/docs.ex

@@ -1,668 +0,0 @@
-defmodule IO.ANSI.Docs do
-  @moduledoc false
-
-  @bullets [?*, ?-, ?+]
-  @spaces [" ", "\n", "\t"]
-
-  @doc """
-  The default options used by this module.
-
-  The supported keys are:
-
-    * `:enabled`           - toggles coloring on and off (true)
-    * `:doc_bold`          - bold text (bright)
-    * `:doc_code`          - code blocks (cyan)
-    * `:doc_headings`      - h1, h2, h3, h4, h5, h6 headings (yellow)
-    * `:doc_metadata`      - documentation metadata keys (yellow)
-    * `:doc_inline_code`   - inline code (cyan)
-    * `:doc_table_heading` - the style for table headings
-    * `:doc_title`         - top level heading (reverse, yellow)
-    * `:doc_underline`     - underlined text (underline)
-    * `:width`             - the width to format the text (80)
-
-  Values for the color settings are strings with
-  comma-separated ANSI values.
-  """
-  @spec default_options() :: keyword
-  def default_options do
-    [
-      enabled: true,
-      doc_bold: [:bright],
-      doc_code: [:cyan],
-      doc_headings: [:yellow],
-      doc_metadata: [:yellow],
-      doc_inline_code: [:cyan],
-      doc_table_heading: [:reverse],
-      doc_title: [:reverse, :yellow],
-      doc_underline: [:underline],
-      width: 80
-    ]
-  end
-
-  @doc """
-  Prints the head of the documentation (i.e. the function signature).
-
-  See `default_options/0` for docs on the supported options.
-  """
-  @spec print_heading(String.t(), keyword) :: :ok
-  def print_heading(heading, options \\ []) do
-    IO.puts(IO.ANSI.reset())
-    options = Keyword.merge(default_options(), options)
-    width = options[:width]
-    padding = div(width + String.length(heading), 2)
-    heading = heading |> String.pad_leading(padding) |> String.pad_trailing(width)
-    write(:doc_title, heading, options)
-    newline_after_block()
-  end
-
-  @doc """
-  Prints documentation metadata (only `delegate_to`, `deprecated`, `guard`, and `since` for now).
-
-  See `default_options/0` for docs on the supported options.
-  """
-  @spec print_metadata(map, keyword) :: :ok
-  def print_metadata(metadata, options \\ []) when is_map(metadata) do
-    options = Keyword.merge(default_options(), options)
-    print_each_metadata(metadata, options) && IO.write("\n")
-  end
-
-  @metadata_filter [:deprecated, :guard, :since]
-
-  defp print_each_metadata(metadata, options) do
-    Enum.reduce(metadata, false, fn
-      {key, value}, _printed when is_binary(value) and key in @metadata_filter ->
-        label = metadata_label(key, options)
-        indent = String.duplicate(" ", length_without_escape(label, 0) + 1)
-        write_with_wrap([label | String.split(value, @spaces)], options[:width], indent, true)
-
-      {key, value}, _printed when is_boolean(value) and key in @metadata_filter ->
-        IO.puts([metadata_label(key, options), ' ', to_string(value)])
-
-      {:delegate_to, {m, f, a}}, _printed ->
-        label = metadata_label(:delegate_to, options)
-        IO.puts([label, ' ', Exception.format_mfa(m, f, a)])
-
-      _metadata, printed ->
-        printed
-    end)
-  end
-
-  defp metadata_label(key, options) do
-    if options[:enabled] do
-      "#{color(:doc_metadata, options)}#{key}:#{IO.ANSI.reset()}"
-    else
-      "#{key}:"
-    end
-  end
-
-  @doc """
-  Prints the documentation body.
-
-  In addition to the printing string, takes a set of `options`
-  defined in `default_options/0`.
-  """
-  @spec print(String.t(), keyword) :: :ok
-  def print(doc, options \\ []) do
-    options = Keyword.merge(default_options(), options)
-
-    doc
-    |> String.split(["\r\n", "\n"], trim: false)
-    |> Enum.map(&String.trim_trailing/1)
-    |> process([], "", options)
-  end
-
-  defp process([], text, indent, options) do
-    write_text(text, indent, options)
-  end
-
-  defp process(["# " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["## " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["### " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["#### " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["##### " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["###### " <> _ = heading | rest], text, indent, options) do
-    write_heading(heading, rest, text, indent, options)
-  end
-
-  defp process(["" | rest], text, indent, options) do
-    write_text(text, indent, options)
-    process(rest, [], indent, options)
-  end
-
-  defp process(["    " <> line | rest], text, indent, options) do
-    write_text(text, indent, options)
-    process_code(rest, [line], indent, options)
-  end
-
-  defp process(["```" <> _line | rest], text, indent, options) do
-    process_fenced_code_block(rest, text, indent, options, _delimiter = "```")
-  end
-
-  defp process(["~~~" <> _line | rest], text, indent, options) do
-    process_fenced_code_block(rest, text, indent, options, _delimiter = "~~~")
-  end
-
-  defp process(all = [line | rest], text, indent, options) do
-    {stripped, count} = strip_spaces(line, 0, :infinity)
-
-    cond do
-      link_label?(stripped, count) ->
-        write_text([line], indent, options, true)
-        process(rest, text, indent, options)
-
-      table_line?(stripped) and rest != [] and table_line?(hd(rest)) ->
-        write_text(text, indent, options)
-        process_table(all, indent, options)
-
-      true ->
-        process_rest(stripped, rest, count, text, indent, options)
-    end
-  end
-
-  ## Headings
-
-  defp write_heading(heading, rest, text, indent, options) do
-    write_text(text, indent, options)
-    write(:doc_headings, heading, options)
-    newline_after_block()
-    process(rest, [], "", options)
-  end
-
-  ## Lists
-
-  defp process_rest(stripped, rest, count, text, indent, options) do
-    case stripped do
-      <<bullet, ?\s, item::binary>> when bullet in @bullets ->
-        write_text(text, indent, options)
-        process_list("• ", item, rest, count, indent, options)
-
-      <<d1, ?., ?\s, item::binary>> when d1 in ?0..?9 ->
-        write_text(text, indent, options)
-        process_list(<<d1, ?., ?\s>>, item, rest, count, indent, options)
-
-      <<d1, d2, ?., ?\s, item::binary>> when d1 in ?0..?9 and d2 in ?0..?9 ->
-        write_text(text, indent, options)
-        process_list(<<d1, d2, ?., ?\s>>, item, rest, count, indent, options)
-
-      _ ->
-        process(rest, [stripped | text], indent, options)
-    end
-  end
-
-  defp process_list(entry, line, rest, count, indent, options) do
-    # The first list always win some extra padding
-    entry = if indent == "", do: "  " <> entry, else: entry
-    new_indent = indent <> String.duplicate(" ", String.length(entry))
-
-    {contents, rest, done} = process_list_next(rest, count, byte_size(new_indent), [])
-    process(contents, [indent <> entry <> line, :no_wrap], new_indent, options)
-
-    if done, do: newline_after_block()
-    process(rest, [], indent, options)
-  end
-
-  defp process_list_next([line | rest], count, max, acc) do
-    {stripped, next_count} = strip_spaces(line, 0, max)
-
-    case process_list_next_kind(stripped, rest, count, next_count) do
-      :next -> process_list_next(rest, count, max, [stripped | acc])
-      :done -> {Enum.reverse(acc), [line | rest], true}
-      :list -> {Enum.reverse(acc), [line | rest], false}
-    end
-  end
-
-  defp process_list_next([], _count, _max, acc) do
-    {Enum.reverse(acc), [], true}
-  end
-
-  defp process_list_next_kind(stripped, rest, count, next_count) do
-    case {stripped, rest} do
-      {<<bullet, ?\s, _::binary>>, _} when bullet in @bullets and next_count <= count ->
-        :list
-
-      {<<d1, ?., ?\s, _::binary>>, _} when d1 in ?0..?9 and next_count <= count ->
-        :list
-
-      {<<d1, d2, ?., ?\s, _::binary>>, _}
-      when d1 in ?0..?9 and d2 in ?0..?9 and next_count <= count ->
-        :list
-
-      {"", [" " <> _ | _]} ->
-        :next
-
-      {"", _} ->
-        :done
-
-      _ ->
-        :next
-    end
-  end
-
-  ## Text
-
-  defp write_text(text, indent, options) do
-    case Enum.reverse(text) do
-      [:no_wrap | rest] -> write_text(rest, indent, options, true)
-      rest -> write_text(rest, indent, options, false)
-    end
-  end
-
-  defp write_text([], _indent, _options, _no_wrap) do
-    :ok
-  end
-
-  defp write_text(lines, indent, options, no_wrap) do
-    lines
-    |> Enum.join(" ")
-    |> handle_links
-    |> handle_inline(options)
-    |> String.split(@spaces)
-    |> write_with_wrap(options[:width] - byte_size(indent), indent, no_wrap)
-
-    unless no_wrap, do: newline_after_block()
-  end
-
-  ## Code blocks
-
-  defp process_code([], code, indent, options) do
-    write_code(code, indent, options)
-  end
-
-  # Blank line between code blocks
-  defp process_code(["", "    " <> line | rest], code, indent, options) do
-    process_code(rest, [line, "" | code], indent, options)
-  end
-
-  defp process_code(["    " <> line | rest], code, indent, options) do
-    process_code(rest, [line | code], indent, options)
-  end
-
-  defp process_code(rest, code, indent, options) do
-    write_code(code, indent, options)
-    process(rest, [], indent, options)
-  end
-
-  defp process_fenced_code_block(rest, text, indent, options, delimiter) do
-    write_text(text, indent, options)
-    process_fenced_code(rest, [], indent, options, delimiter)
-  end
-
-  defp process_fenced_code([], code, indent, options, _delimiter) do
-    write_code(code, indent, options)
-  end
-
-  defp process_fenced_code([line | rest], code, indent, options, delimiter) do
-    if line === delimiter do
-      process_code(rest, code, indent, options)
-    else
-      process_fenced_code(rest, [line | code], indent, options, delimiter)
-    end
-  end
-
-  defp write_code(code, indent, options) do
-    write(:doc_code, "#{indent}    #{Enum.join(Enum.reverse(code), "\n#{indent}    ")}", options)
-    newline_after_block()
-  end
-
-  ## Tables
-
-  defp process_table(lines, indent, options) do
-    {table, rest} = Enum.split_while(lines, &table_line?/1)
-    table_lines(table, options)
-    newline_after_block()
-    process(rest, [], indent, options)
-  end
-
-  defp table_lines(lines, options) do
-    lines = Enum.map(lines, &split_into_columns(&1, options))
-    count = Enum.map(lines, &length/1) |> Enum.max()
-    lines = Enum.map(lines, &pad_to_number_of_columns(&1, count))
-
-    widths =
-      for line <- lines do
-        if table_header?(line) do
-          for _ <- line, do: 0
-        else
-          for {_col, length} <- line, do: length
-        end
-      end
-
-    col_widths = Enum.reduce(widths, List.duplicate(0, count), &max_column_widths/2)
-    render_table(lines, col_widths, options)
-  end
-
-  defp split_into_columns(line, options) do
-    line
-    |> String.trim("|")
-    |> String.trim()
-    |> String.split(" | ")
-    |> Enum.map(&render_column(&1, options))
-  end
-
-  defp render_column(col, options) do
-    col =
-      col
-      |> String.replace("\\\|", "|")
-      |> String.trim()
-      |> handle_links
-      |> handle_inline(options)
-
-    {col, length_without_escape(col, 0)}
-  end
-
-  defp pad_to_number_of_columns(cols, col_count),
-    do: cols ++ List.duplicate({"", 0}, col_count - length(cols))
-
-  defp max_column_widths(cols, widths),
-    do: Enum.zip(cols, widths) |> Enum.map(fn {a, b} -> max(a, b) end)
-
-  # If second line is heading separator, use the heading style on the first
-  defp render_table([first, second | rest], widths, options) do
-    combined = Enum.zip(first, widths)
-
-    if table_header?(second) do
-      alignments = Enum.map(second, &column_alignment/1)
-      options = Keyword.put_new(options, :alignments, alignments)
-      draw_table_row(combined, options, :heading)
-      render_table(rest, widths, options)
-    else
-      draw_table_row(combined, options)
-      render_table([second | rest], widths, options)
-    end
-  end
-
-  defp render_table([first | rest], widths, options) do
-    combined = Enum.zip(first, widths)
-    draw_table_row(combined, options)
-    render_table(rest, widths, options)
-  end
-
-  defp render_table([], _, _), do: nil
-
-  defp column_alignment({line, _}) do
-    cond do
-      String.starts_with?(line, ":") and String.ends_with?(line, ":") -> :center
-      String.ends_with?(line, ":") -> :right
-      true -> :left
-    end
-  end
-
-  defp table_header?(line) do
-    Enum.all?(line, fn {col, _} -> table_header_column?(col) end)
-  end
-
-  defp table_header_column?(":" <> rest), do: table_header_contents?(rest)
-  defp table_header_column?(col), do: table_header_contents?(col)
-
-  defp table_header_contents?("-" <> rest), do: table_header_contents?(rest)
-  defp table_header_contents?(":"), do: true
-  defp table_header_contents?(""), do: true
-  defp table_header_contents?(_), do: false
-
-  defp draw_table_row(cols_and_widths, options, heading \\ false) do
-    default_alignments = List.duplicate(:left, length(cols_and_widths))
-    alignments = Keyword.get(options, :alignments, default_alignments)
-
-    columns =
-      cols_and_widths
-      |> Enum.zip(alignments)
-      |> Enum.map_join(" | ", &generate_table_cell/1)
-
-    if heading do
-      write(:doc_table_heading, columns, options)
-    else
-      IO.puts(columns)
-    end
-  end
-
-  defp generate_table_cell({{{col, length}, width}, :center}) do
-    ansi_diff = byte_size(col) - length
-    width = width + ansi_diff
-
-    col
-    |> String.pad_leading(div(width, 2) - div(length, 2) + length)
-    |> String.pad_trailing(width + 1 - rem(width, 2))
-  end
-
-  defp generate_table_cell({{{col, length}, width}, :right}) do
-    ansi_diff = byte_size(col) - length
-    String.pad_leading(col, width + ansi_diff)
-  end
-
-  defp generate_table_cell({{{col, length}, width}, :left}) do
-    ansi_diff = byte_size(col) - length
-    String.pad_trailing(col, width + ansi_diff)
-  end
-
-  defp table_line?(line) do
-    line =~ " | "
-  end
-
-  ## Helpers
-
-  defp link_label?("[" <> rest, count) when count <= 3, do: link_label?(rest)
-  defp link_label?(_, _), do: false
-
-  defp link_label?("]: " <> _), do: true
-  defp link_label?("]" <> _), do: false
-  defp link_label?(""), do: false
-  defp link_label?(<<_>> <> rest), do: link_label?(rest)
-
-  defp strip_spaces(" " <> line, acc, max) when acc < max, do: strip_spaces(line, acc + 1, max)
-  defp strip_spaces(rest, acc, _max), do: {rest, acc}
-
-  defp write(style, string, options) do
-    IO.puts([color(style, options), string, IO.ANSI.reset()])
-  end
-
-  defp write_with_wrap([], _available, _indent, _first) do
-    :ok
-  end
-
-  defp write_with_wrap(words, available, indent, first) do
-    {words, rest} = take_words(words, available, [])
-    IO.puts(if(first, do: "", else: indent) <> Enum.join(words, " "))
-    write_with_wrap(rest, available, indent, false)
-  end
-
-  defp take_words([word | words], available, acc) do
-    available = available - length_without_escape(word, 0)
-
-    cond do
-      # It fits, take one for space and continue decreasing
-      available > 0 ->
-        take_words(words, available - 1, [word | acc])
-
-      # No space but we got no words
-      acc == [] ->
-        {[word], words}
-
-      # Otherwise
-      true ->
-        {Enum.reverse(acc), [word | words]}
-    end
-  end
-
-  defp take_words([], _available, acc) do
-    {Enum.reverse(acc), []}
-  end
-
-  defp length_without_escape(<<?\e, ?[, _, _, ?m>> <> rest, count) do
-    length_without_escape(rest, count)
-  end
-
-  defp length_without_escape(<<?\e, ?[, _, ?m>> <> rest, count) do
-    length_without_escape(rest, count)
-  end
-
-  defp length_without_escape(rest, count) do
-    case String.next_grapheme(rest) do
-      {_, rest} -> length_without_escape(rest, count + 1)
-      nil -> count
-    end
-  end
-
-  defp handle_links(text) do
-    text
-    |> remove_square_brackets_in_link
-    |> escape_underlines_in_link
-  end
-
-  defp escape_underlines_in_link(text) do
-    # Regular expression adapted from https://tools.ietf.org/html/rfc3986#appendix-B
-    ~r{[a-z][a-z0-9\+\-\.]*://\S*}i
-    |> Regex.recompile!()
-    |> Regex.replace(text, &String.replace(&1, "_", "\\_"))
-  end
-
-  defp remove_square_brackets_in_link(text) do
-    ~r{\[(.*?)\]\((.*?)\)}
-    |> Regex.recompile!()
-    |> Regex.replace(text, "\\1 (\\2)")
-  end
-
-  # We have four entries: **, *, _ and `.
-  #
-  # The first three behave the same while the last one is simpler
-  # when it comes to delimiters as it ignores spaces and escape
-  # characters. But, since the first has two characters, we need to
-  # handle 3 cases:
-  #
-  # 1. **
-  # 2. _ and *
-  # 3. `
-  #
-  # Where the first two should have the same code but match differently.
-  @single [?_, ?*]
-
-  # Characters that can mark the beginning or the end of a word.
-  # Only support the most common ones at this moment.
-  @delimiters [?\s, ?', ?", ?!, ?@, ?#, ?$, ?%, ?^, ?&] ++
-                [?-, ?+, ?(, ?), ?[, ?], ?{, ?}, ?<, ?>, ?.]
-
-  # Inline start
-
-  defp handle_inline(<<?*, ?*, rest::binary>>, options) do
-    handle_inline(rest, ?d, ["**"], [], options)
-  end
-
-  defp handle_inline(<<mark, rest::binary>>, options) when mark in @single do
-    handle_inline(rest, mark, [<<mark>>], [], options)
-  end
-
-  defp handle_inline(rest, options) do
-    handle_inline(rest, nil, [], [], options)
-  end
-
-  # Inline delimiters
-
-  defp handle_inline(<<delimiter, ?*, ?*, rest::binary>>, nil, buffer, acc, options)
-       when rest != "" and delimiter in @delimiters do
-    handle_inline(rest, ?d, ["**"], [delimiter, Enum.reverse(buffer) | acc], options)
-  end
-
-  defp handle_inline(<<delimiter, mark, rest::binary>>, nil, buffer, acc, options)
-       when rest != "" and delimiter in @delimiters and mark in @single do
-    handle_inline(rest, mark, [<<mark>>], [delimiter, Enum.reverse(buffer) | acc], options)
-  end
-
-  defp handle_inline(<<?`, rest::binary>>, nil, buffer, acc, options)
-       when rest != "" do
-    handle_inline(rest, ?`, ["`"], [Enum.reverse(buffer) | acc], options)
-  end
-
-  # Clauses for handling escape
-
-  defp handle_inline(<<?\\, ?\\, ?*, ?*, rest::binary>>, nil, buffer, acc, options)
-       when rest != "" do
-    handle_inline(rest, ?d, ["**"], [?\\, Enum.reverse(buffer) | acc], options)
-  end
-
-  defp handle_inline(<<?\\, ?\\, mark, rest::binary>>, nil, buffer, acc, options)
-       when rest != "" and mark in @single do
-    handle_inline(rest, mark, [<<mark>>], [?\\, Enum.reverse(buffer) | acc], options)
-  end
-
-  defp handle_inline(<<?\\, ?\\, rest::binary>>, limit, buffer, acc, options) do
-    handle_inline(rest, limit, [?\\ | buffer], acc, options)
-  end
-
-  # An escape is not valid inside `
-  defp handle_inline(<<?\\, mark, rest::binary>>, limit, buffer, acc, options) when limit != ?` do
-    handle_inline(rest, limit, [mark | buffer], acc, options)
-  end
-
-  # Inline end
-
-  defp handle_inline(<<?*, ?*, delimiter, rest::binary>>, ?d, buffer, acc, options)
-       when delimiter in @delimiters do
-    inline_buffer = inline_buffer(buffer, options)
-    handle_inline(<<delimiter, rest::binary>>, nil, [], [inline_buffer | acc], options)
-  end
-
-  defp handle_inline(<<mark, delimiter, rest::binary>>, mark, buffer, acc, options)
-       when delimiter in @delimiters and mark in @single do
-    inline_buffer = inline_buffer(buffer, options)
-    handle_inline(<<delimiter, rest::binary>>, nil, [], [inline_buffer | acc], options)
-  end
-
-  defp handle_inline(<<?*, ?*, rest::binary>>, ?d, buffer, acc, options)
-       when rest == "" do
-    handle_inline(<<>>, nil, [], [inline_buffer(buffer, options) | acc], options)
-  end
-
-  defp handle_inline(<<mark, rest::binary>>, mark, buffer, acc, options)
-       when rest == "" and mark in @single do
-    handle_inline(<<>>, nil, [], [inline_buffer(buffer, options) | acc], options)
-  end
-
-  defp handle_inline(<<?`, rest::binary>>, ?`, buffer, acc, options) do
-    handle_inline(rest, nil, [], [inline_buffer(buffer, options) | acc], options)
-  end
-
-  # Catch all
-
-  defp handle_inline(<<char, rest::binary>>, mark, buffer, acc, options) do
-    handle_inline(rest, mark, [char | buffer], acc, options)
-  end
-
-  defp handle_inline(<<>>, _mark, buffer, acc, _options) do
-    IO.iodata_to_binary(Enum.reverse([Enum.reverse(buffer) | acc]))
-  end
-
-  defp inline_buffer(buffer, options) do
-    [h | t] = Enum.reverse([IO.ANSI.reset() | buffer])
-    [color_for(h, options) | t]
-  end
-
-  defp color_for(mark, colors) do
-    case mark do
-      "`" -> color(:doc_inline_code, colors)
-      "_" -> color(:doc_underline, colors)
-      "*" -> color(:doc_bold, colors)
-      "**" -> color(:doc_bold, colors)
-    end
-  end
-
-  defp color(style, colors) do
-    color = colors[style]
-    IO.ANSI.format_fragment(color, colors[:enabled])
-  end
-
-  defp newline_after_block, do: IO.puts(IO.ANSI.reset())
-end

lib/elixir/lib/io/stream.ex

@@ -1,78 +0,0 @@
-defmodule IO.StreamError do
-  defexception [:reason, :message]
-
-  @impl true
-  def exception(opts) do
-    reason = opts[:reason]
-    formatted = IO.iodata_to_binary(:file.format_error(reason))
-    %IO.StreamError{message: "error during streaming: #{formatted}", reason: reason}
-  end
-end
-
-defmodule IO.Stream do
-  @moduledoc """
-  Defines an `IO.Stream` struct returned by `IO.stream/2` and `IO.binstream/2`.
-
-  The following fields are public:
-
-    * `device`        - the IO device
-    * `raw`           - a boolean indicating if bin functions should be used
-    * `line_or_bytes` - if reading should read lines or a given number of bytes
-
-  It is worth noting that an IO stream has side effects and every time you go
-  over the stream you may get different results.
-
-  """
-
-  defstruct device: nil, raw: true, line_or_bytes: :line
-
-  @type t :: %__MODULE__{}
-
-  @doc false
-  def __build__(device, raw, line_or_bytes) do
-    %IO.Stream{device: device, raw: raw, line_or_bytes: line_or_bytes}
-  end
-
-  defimpl Collectable do
-    def into(%{device: device, raw: raw} = stream) do
-      {:ok, into(stream, device, raw)}
-    end
-
-    defp into(stream, device, raw) do
-      fn
-        :ok, {:cont, x} ->
-          case raw do
-            true -> IO.binwrite(device, x)
-            false -> IO.write(device, x)
-          end
-
-        :ok, _ ->
-          stream
-      end
-    end
-  end
-
-  defimpl Enumerable do
-    def reduce(%{device: device, raw: raw, line_or_bytes: line_or_bytes}, acc, fun) do
-      next_fun =
-        case raw do
-          true -> &IO.each_binstream(&1, line_or_bytes)
-          false -> &IO.each_stream(&1, line_or_bytes)
-        end
-
-      Stream.resource(fn -> device end, next_fun, & &1).(acc, fun)
-    end
-
-    def count(_stream) do
-      {:error, __MODULE__}
-    end
-
-    def member?(_stream, _term) do
-      {:error, __MODULE__}
-    end
-
-    def slice(_stream) do
-      {:error, __MODULE__}
-    end
-  end
-end

lib/elixir/lib/kernel/cli.ex

@@ -1,522 +0,0 @@
-defmodule Kernel.CLI do
-  @moduledoc false
-
-  @blank_config %{
-    commands: [],
-    output: ".",
-    compile: [],
-    halt: true,
-    compiler_options: [],
-    errors: [],
-    pa: [],
-    pz: [],
-    verbose_compile: false
-  }
-
-  @doc """
-  This is the API invoked by Elixir boot process.
-  """
-  def main(argv) do
-    argv = for arg <- argv, do: IO.chardata_to_string(arg)
-
-    {config, argv} = parse_argv(argv)
-    System.argv(argv)
-
-    fun = fn _ ->
-      errors = process_commands(config)
-
-      if errors != [] do
-        Enum.each(errors, &IO.puts(:stderr, &1))
-        System.halt(1)
-      end
-    end
-
-    run(fun, config.halt)
-  end
-
-  @doc """
-  Runs the given function by catching any failure
-  and printing them to stdout. `at_exit` hooks are
-  also invoked before exiting.
-
-  This function is used by Elixir's CLI and also
-  by escripts generated by Elixir.
-  """
-  def run(fun, halt \\ true) do
-    {ok_or_shutdown, status} = exec_fun(fun, {:ok, 0})
-
-    if ok_or_shutdown == :shutdown or halt do
-      {_, status} = at_exit({ok_or_shutdown, status})
-
-      # Ensure Logger messages are flushed before halting
-      case :erlang.whereis(Logger) do
-        pid when is_pid(pid) -> Logger.flush()
-        _ -> :ok
-      end
-
-      System.halt(status)
-    end
-  end
-
-  @doc false
-  def parse_argv(argv) do
-    parse_argv(argv, @blank_config)
-  end
-
-  @doc false
-  def process_commands(config) do
-    results = Enum.map(Enum.reverse(config.commands), &process_command(&1, config))
-    errors = for {:error, msg} <- results, do: msg
-    Enum.reverse(config.errors, errors)
-  end
-
-  @doc false
-  def format_error(kind, reason, stacktrace) do
-    {blamed, stacktrace} = Exception.blame(kind, reason, stacktrace)
-
-    iodata =
-      case blamed do
-        %FunctionClauseError{} ->
-          formatted = Exception.format_banner(kind, reason, stacktrace)
-          padded_blame = pad(FunctionClauseError.blame(blamed, &inspect/1, &blame_match/2))
-          [formatted, padded_blame]
-
-        _ ->
-          Exception.format_banner(kind, blamed, stacktrace)
-      end
-
-    [iodata, ?\n, Exception.format_stacktrace(prune_stacktrace(stacktrace))]
-  end
-
-  ## Helpers
-
-  defp at_exit(res) do
-    hooks = :elixir_config.get_and_put(:at_exit, [])
-    res = Enum.reduce(hooks, res, &exec_fun/2)
-    if hooks == [], do: res, else: at_exit(res)
-  end
-
-  defp exec_fun(fun, res) when is_function(fun, 1) and is_tuple(res) do
-    parent = self()
-
-    {pid, ref} =
-      spawn_monitor(fn ->
-        try do
-          fun.(elem(res, 1))
-        catch
-          :exit, {:shutdown, int} when is_integer(int) ->
-            send(parent, {self(), {:shutdown, int}})
-            exit({:shutdown, int})
-
-          :exit, reason
-          when reason == :normal
-          when reason == :shutdown
-          when tuple_size(reason) == 2 and elem(reason, 0) == :shutdown ->
-            send(parent, {self(), {:shutdown, 0}})
-            exit(reason)
-
-          kind, reason ->
-            print_error(kind, reason, __STACKTRACE__)
-            send(parent, {self(), {:shutdown, 1}})
-            exit(to_exit(kind, reason, __STACKTRACE__))
-        else
-          _ ->
-            send(parent, {self(), res})
-        end
-      end)
-
-    receive do
-      {^pid, res} ->
-        :erlang.demonitor(ref, [:flush])
-        res
-
-      {:DOWN, ^ref, _, _, other} ->
-        print_error({:EXIT, pid}, other, [])
-        {:shutdown, 1}
-    end
-  end
-
-  defp to_exit(:throw, reason, stack), do: {{:nocatch, reason}, stack}
-  defp to_exit(:error, reason, stack), do: {reason, stack}
-  defp to_exit(:exit, reason, _stack), do: reason
-
-  defp shared_option?(list, config, callback) do
-    case parse_shared(list, config) do
-      {[h | hs], _} when h == hd(list) ->
-        new_config = %{config | errors: ["#{h} : Unknown option" | config.errors]}
-        callback.(hs, new_config)
-
-      {new_list, new_config} ->
-        callback.(new_list, new_config)
-    end
-  end
-
-  ## Error handling
-
-  defp print_error(kind, reason, stacktrace) do
-    IO.write(:stderr, format_error(kind, reason, stacktrace))
-  end
-
-  defp blame_match(%{match?: true, node: node}, _), do: blame_ansi(:normal, "+", node)
-  defp blame_match(%{match?: false, node: node}, _), do: blame_ansi(:red, "-", node)
-  defp blame_match(_, string), do: string
-
-  defp blame_ansi(color, no_ansi, node) do
-    if IO.ANSI.enabled?() do
-      [color | Macro.to_string(node)]
-      |> IO.ANSI.format(true)
-      |> IO.iodata_to_binary()
-    else
-      no_ansi <> Macro.to_string(node) <> no_ansi
-    end
-  end
-
-  defp pad(string) do
-    "    " <> String.replace(string, "\n", "\n    ")
-  end
-
-  @elixir_internals [:elixir, :elixir_aliases, :elixir_expand, :elixir_compiler, :elixir_module] ++
-                      [:elixir_clauses, :elixir_lexical, :elixir_def, :elixir_map] ++
-                      [:elixir_erl, :elixir_erl_clauses, :elixir_erl_pass, Kernel.ErrorHandler]
-
-  defp prune_stacktrace([{mod, _, _, _} | t]) when mod in @elixir_internals do
-    prune_stacktrace(t)
-  end
-
-  defp prune_stacktrace([{__MODULE__, :wrapper, 1, _} | _]) do
-    []
-  end
-
-  defp prune_stacktrace([h | t]) do
-    [h | prune_stacktrace(t)]
-  end
-
-  defp prune_stacktrace([]) do
-    []
-  end
-
-  # Parse shared options
-
-  defp parse_shared([opt | _t], _config) when opt in ["-v", "--version"] do
-    if function_exported?(IEx, :started?, 0) and IEx.started?() do
-      IO.puts("IEx " <> System.build_info()[:build])
-    else
-      IO.puts(:erlang.system_info(:system_version))
-      IO.puts("Elixir " <> System.build_info()[:build])
-    end
-
-    System.halt(0)
-  end
-
-  defp parse_shared(["-pa", h | t], config) do
-    paths = expand_code_path(h)
-    Enum.each(paths, &:code.add_patha/1)
-    parse_shared(t, %{config | pa: config.pa ++ paths})
-  end
-
-  defp parse_shared(["-pz", h | t], config) do
-    paths = expand_code_path(h)
-    Enum.each(paths, &:code.add_pathz/1)
-    parse_shared(t, %{config | pz: config.pz ++ paths})
-  end
-
-  defp parse_shared(["--app", h | t], config) do
-    parse_shared(t, %{config | commands: [{:app, h} | config.commands]})
-  end
-
-  defp parse_shared(["--no-halt" | t], config) do
-    parse_shared(t, %{config | halt: false})
-  end
-
-  defp parse_shared(["-e", h | t], config) do
-    parse_shared(t, %{config | commands: [{:eval, h} | config.commands]})
-  end
-
-  defp parse_shared(["-r", h | t], config) do
-    parse_shared(t, %{config | commands: [{:require, h} | config.commands]})
-  end
-
-  defp parse_shared(["-pr", h | t], config) do
-    parse_shared(t, %{config | commands: [{:parallel_require, h} | config.commands]})
-  end
-
-  @erl_arg_options ["--erl", "--sname", "--name", "--cookie"] ++
-                     ["--logger-otp-reports", "--logger-sasl-reports"]
-
-  @erl_boolean_options ["--detached", "--hidden", "--werl"]
-
-  defp parse_shared([erl, _ | t], config) when erl in @erl_arg_options do
-    parse_shared(t, config)
-  end
-
-  defp parse_shared([erl | t], config) when erl in @erl_boolean_options do
-    parse_shared(t, config)
-  end
-
-  defp parse_shared(list, config) do
-    {list, config}
-  end
-
-  defp expand_code_path(path) do
-    path = Path.expand(path)
-
-    case Path.wildcard(path) do
-      [] -> [to_charlist(path)]
-      list -> Enum.map(list, &to_charlist/1)
-    end
-  end
-
-  # Process init options
-
-  defp parse_argv(["--" | t], config) do
-    {config, t}
-  end
-
-  defp parse_argv(["+elixirc" | t], config) do
-    parse_compiler(t, config)
-  end
-
-  defp parse_argv(["+iex" | t], config) do
-    parse_iex(t, config)
-  end
-
-  defp parse_argv(["-S", h | t], config) do
-    {%{config | commands: [{:script, h} | config.commands]}, t}
-  end
-
-  defp parse_argv([h | t] = list, config) do
-    case h do
-      "-" <> _ ->
-        shared_option?(list, config, &parse_argv(&1, &2))
-
-      _ ->
-        if Keyword.has_key?(config.commands, :eval) do
-          {config, list}
-        else
-          {%{config | commands: [{:file, h} | config.commands]}, t}
-        end
-    end
-  end
-
-  defp parse_argv([], config) do
-    {config, []}
-  end
-
-  # Parse compiler options
-
-  defp parse_compiler(["--" | t], config) do
-    {config, t}
-  end
-
-  defp parse_compiler(["-o", h | t], config) do
-    parse_compiler(t, %{config | output: h})
-  end
-
-  defp parse_compiler(["--no-docs" | t], config) do
-    parse_compiler(t, %{config | compiler_options: [{:docs, false} | config.compiler_options]})
-  end
-
-  defp parse_compiler(["--no-debug-info" | t], config) do
-    compiler_options = [{:debug_info, false} | config.compiler_options]
-    parse_compiler(t, %{config | compiler_options: compiler_options})
-  end
-
-  defp parse_compiler(["--ignore-module-conflict" | t], config) do
-    compiler_options = [{:ignore_module_conflict, true} | config.compiler_options]
-    parse_compiler(t, %{config | compiler_options: compiler_options})
-  end
-
-  defp parse_compiler(["--warnings-as-errors" | t], config) do
-    compiler_options = [{:warnings_as_errors, true} | config.compiler_options]
-    parse_compiler(t, %{config | compiler_options: compiler_options})
-  end
-
-  defp parse_compiler(["--verbose" | t], config) do
-    parse_compiler(t, %{config | verbose_compile: true})
-  end
-
-  defp parse_compiler([h | t] = list, config) do
-    case h do
-      "-" <> _ ->
-        shared_option?(list, config, &parse_compiler(&1, &2))
-
-      _ ->
-        pattern = if File.dir?(h), do: "#{h}/**/*.ex", else: h
-        parse_compiler(t, %{config | compile: [pattern | config.compile]})
-    end
-  end
-
-  defp parse_compiler([], config) do
-    {%{config | commands: [{:compile, config.compile} | config.commands]}, []}
-  end
-
-  # Parse IEx options
-
-  defp parse_iex(["--" | t], config) do
-    {config, t}
-  end
-
-  # This clause is here so that Kernel.CLI does not
-  # error out with "unknown option"
-  defp parse_iex(["--dot-iex", _ | t], config) do
-    parse_iex(t, config)
-  end
-
-  defp parse_iex([opt, _ | t], config) when opt in ["--remsh"] do
-    parse_iex(t, config)
-  end
-
-  defp parse_iex(["-S", h | t], config) do
-    {%{config | commands: [{:script, h} | config.commands]}, t}
-  end
-
-  defp parse_iex([h | t] = list, config) do
-    case h do
-      "-" <> _ -> shared_option?(list, config, &parse_iex(&1, &2))
-      _ -> {%{config | commands: [{:file, h} | config.commands]}, t}
-    end
-  end
-
-  defp parse_iex([], config) do
-    {config, []}
-  end
-
-  # Process commands
-
-  defp process_command({:cookie, h}, _config) do
-    if Node.alive?() do
-      wrapper(fn -> Node.set_cookie(String.to_atom(h)) end)
-    else
-      {:error, "--cookie : Cannot set cookie if the node is not alive (set --name or --sname)"}
-    end
-  end
-
-  defp process_command({:eval, expr}, _config) when is_binary(expr) do
-    wrapper(fn -> Code.eval_string(expr, []) end)
-  end
-
-  defp process_command({:app, app}, _config) when is_binary(app) do
-    case Application.ensure_all_started(String.to_atom(app)) do
-      {:error, {app, reason}} ->
-        msg = "--app : Could not start application #{app}: " <> Application.format_error(reason)
-        {:error, msg}
-
-      {:ok, _} ->
-        :ok
-    end
-  end
-
-  defp process_command({:script, file}, _config) when is_binary(file) do
-    if exec = find_elixir_executable(file) do
-      wrapper(fn -> Code.require_file(exec) end)
-    else
-      {:error, "-S : Could not find executable #{file}"}
-    end
-  end
-
-  defp process_command({:file, file}, _config) when is_binary(file) do
-    if File.regular?(file) do
-      wrapper(fn -> Code.require_file(file) end)
-    else
-      {:error, "No file named #{file}"}
-    end
-  end
-
-  defp process_command({:require, pattern}, _config) when is_binary(pattern) do
-    files = filter_patterns(pattern)
-
-    if files != [] do
-      wrapper(fn -> Enum.map(files, &Code.require_file(&1)) end)
-    else
-      {:error, "-r : No files matched pattern #{pattern}"}
-    end
-  end
-
-  defp process_command({:parallel_require, pattern}, _config) when is_binary(pattern) do
-    files = filter_patterns(pattern)
-
-    if files != [] do
-      wrapper(fn ->
-        case Kernel.ParallelCompiler.require(files) do
-          {:ok, _, _} -> :ok
-          {:error, _, _} -> exit({:shutdown, 1})
-        end
-      end)
-    else
-      {:error, "-pr : No files matched pattern #{pattern}"}
-    end
-  end
-
-  defp process_command({:compile, patterns}, config) do
-    # If ensuring the dir returns an error no files will be found.
-    _ = :filelib.ensure_dir(:filename.join(config.output, "."))
-
-    case filter_multiple_patterns(patterns) do
-      {:ok, []} ->
-        {:error, "No files matched provided patterns"}
-
-      {:ok, files} ->
-        wrapper(fn ->
-          Code.compiler_options(config.compiler_options)
-
-          opts =
-            if config.verbose_compile do
-              [each_long_compilation: &IO.puts("Compiling #{&1} (it's taking more than 15s)")]
-            else
-              []
-            end
-
-          case Kernel.ParallelCompiler.compile_to_path(files, config.output, opts) do
-            {:ok, _, _} -> :ok
-            {:error, _, _} -> exit({:shutdown, 1})
-          end
-        end)
-
-      {:missing, missing} ->
-        {:error, "No files matched pattern(s) #{Enum.join(missing, ",")}"}
-    end
-  end
-
-  defp filter_patterns(pattern) do
-    pattern
-    |> Path.wildcard()
-    |> :lists.usort()
-    |> Enum.filter(&File.regular?/1)
-  end
-
-  defp filter_multiple_patterns(patterns) do
-    {files, missing} =
-      Enum.reduce(patterns, {[], []}, fn pattern, {files, missing} ->
-        case filter_patterns(pattern) do
-          [] -> {files, [pattern | missing]}
-          match -> {match ++ files, missing}
-        end
-      end)
-
-    case missing do
-      [] -> {:ok, :lists.usort(files)}
-      _ -> {:missing, :lists.usort(missing)}
-    end
-  end
-
-  defp wrapper(fun) do
-    _ = fun.()
-    :ok
-  end
-
-  defp find_elixir_executable(file) do
-    if exec = System.find_executable(file) do
-      # If we are on Windows, the executable is going to be
-      # a .bat file that must be in the same directory as
-      # the actual Elixir executable.
-      case :os.type() do
-        {:win32, _} ->
-          base = Path.rootname(exec)
-          if File.regular?(base), do: base, else: exec
-
-        _ ->
-          exec
-      end
-    end
-  end
-end

lib/elixir/lib/kernel/error_handler.ex

@@ -1,43 +0,0 @@
-# Implement error_handler pattern for Erlang
-# which is integrated with Kernel.ParallelCompiler
-defmodule Kernel.ErrorHandler do
-  @moduledoc false
-
-  @spec undefined_function(module, atom, list) :: term
-  def undefined_function(module, fun, args) do
-    ensure_loaded(module) or ensure_compiled(module, :module)
-    :error_handler.undefined_function(module, fun, args)
-  end
-
-  @spec undefined_lambda(module, fun, list) :: term
-  def undefined_lambda(module, fun, args) do
-    ensure_loaded(module) or ensure_compiled(module, :module)
-    :error_handler.undefined_lambda(module, fun, args)
-  end
-
-  @spec ensure_loaded(module) :: boolean
-  def ensure_loaded(module) do
-    case :code.ensure_loaded(module) do
-      {:module, _} -> true
-      {:error, _} -> false
-    end
-  end
-
-  @spec ensure_compiled(module, atom) :: boolean
-  # Never wait on nil because it should never be defined.
-  def ensure_compiled(nil, _kind) do
-    false
-  end
-
-  def ensure_compiled(module, kind) do
-    parent = :erlang.get(:elixir_compiler_pid)
-    ref = :erlang.make_ref()
-    send(parent, {:waiting, kind, self(), ref, module, :elixir_module.compiler_modules()})
-    :erlang.garbage_collect(self())
-
-    receive do
-      {^ref, :found} -> true
-      {^ref, :not_found} -> false
-    end
-  end
-end

lib/elixir/lib/kernel/lexical_tracker.ex

@@ -1,298 +0,0 @@
-# This is an Elixir module responsible for tracking references
-# to modules, remote dispatches, and the usage of
-# aliases/imports/requires in the Elixir scope.
-#
-# Note that since this is required for bootstrap, we can't use
-# any of the `GenServer.Behaviour` conveniences.
-defmodule Kernel.LexicalTracker do
-  @moduledoc false
-  @timeout 30000
-  @behaviour :gen_server
-
-  @doc """
-  Returns all remotes referenced in this lexical scope.
-  """
-  def remote_references(arg) do
-    :gen_server.call(to_pid(arg), :remote_references, @timeout)
-  end
-
-  @doc """
-  Returns all remote dispatches in this lexical scope.
-  """
-  def remote_dispatches(arg) do
-    :gen_server.call(to_pid(arg), :remote_dispatches, @timeout)
-  end
-
-  defp to_pid(pid) when is_pid(pid), do: pid
-
-  defp to_pid(mod) when is_atom(mod) do
-    {set, _} = :elixir_module.data_tables(mod)
-    :ets.lookup_element(set, {:elixir, :lexical_tracker}, 2)
-  end
-
-  # Internal API
-
-  # Starts the tracker and returns its PID.
-  @doc false
-  def start_link() do
-    :gen_server.start_link(__MODULE__, :ok, [])
-  end
-
-  @doc false
-  def stop(pid) do
-    :gen_server.cast(pid, :stop)
-  end
-
-  @doc false
-  def add_import(pid, module, fas, line, warn) when is_atom(module) do
-    :gen_server.cast(pid, {:add_import, module, fas, line, warn})
-  end
-
-  @doc false
-  def add_alias(pid, module, line, warn) when is_atom(module) do
-    :gen_server.cast(pid, {:add_alias, module, line, warn})
-  end
-
-  @doc false
-  def remote_reference(pid, module, mode) when is_atom(module) do
-    :gen_server.cast(pid, {:remote_reference, module, mode})
-  end
-
-  @doc false
-  def remote_dispatch(pid, module, fa, line, mode) when is_atom(module) do
-    :gen_server.cast(pid, {:remote_dispatch, module, fa, line, mode})
-  end
-
-  @doc false
-  def remote_struct(pid, module, line) when is_atom(module) do
-    :gen_server.cast(pid, {:remote_struct, module, line})
-  end
-
-  @doc false
-  def import_dispatch(pid, module, fa, line, mode) when is_atom(module) do
-    :gen_server.cast(pid, {:import_dispatch, module, fa, line, mode})
-  end
-
-  @doc false
-  def alias_dispatch(pid, module) when is_atom(module) do
-    :gen_server.cast(pid, {:alias_dispatch, module})
-  end
-
-  @doc false
-  def set_file(pid, file) do
-    :gen_server.cast(pid, {:set_file, file})
-  end
-
-  @doc false
-  def reset_file(pid) do
-    :gen_server.cast(pid, :reset_file)
-  end
-
-  @doc false
-  def write_cache(pid, value) do
-    key = :erlang.unique_integer()
-    :gen_server.cast(pid, {:write_cache, key, value})
-    key
-  end
-
-  @doc false
-  def read_cache(pid, key) do
-    :gen_server.call(pid, {:read_cache, key}, @timeout)
-  end
-
-  @doc false
-  def collect_unused_imports(pid) do
-    unused(pid, :import)
-  end
-
-  @doc false
-  def collect_unused_aliases(pid) do
-    unused(pid, :alias)
-  end
-
-  defp unused(pid, tag) do
-    :gen_server.call(pid, {:unused, tag}, @timeout)
-  end
-
-  # Callbacks
-
-  def init(:ok) do
-    state = %{
-      directives: %{},
-      references: %{},
-      compile: %{},
-      runtime: %{},
-      structs: %{},
-      cache: %{},
-      file: nil
-    }
-
-    {:ok, state}
-  end
-
-  @doc false
-  def handle_call({:unused, tag}, _from, state) do
-    directives =
-      for {{^tag, module_or_mfa}, marker} <- state.directives, is_integer(marker) do
-        {module_or_mfa, marker}
-      end
-
-    {:reply, Enum.sort(directives), state}
-  end
-
-  def handle_call(:remote_references, _from, state) do
-    {compile, runtime} = partition(:maps.to_list(state.references), [], [])
-    {:reply, {compile, :maps.keys(state.structs), runtime}, state}
-  end
-
-  def handle_call(:remote_dispatches, _from, state) do
-    {:reply, {state.compile, state.runtime}, state}
-  end
-
-  def handle_call({:read_cache, key}, _from, %{cache: cache} = state) do
-    {:reply, :maps.get(key, cache), state}
-  end
-
-  def handle_cast({:write_cache, key, value}, %{cache: cache} = state) do
-    {:noreply, %{state | cache: :maps.put(key, value, cache)}}
-  end
-
-  def handle_cast({:remote_reference, module, mode}, state) do
-    {:noreply, %{state | references: add_reference(state.references, module, mode)}}
-  end
-
-  def handle_cast({:remote_struct, module, line}, state) do
-    state = add_remote_dispatch(state, module, {:__struct__, 0}, line, :compile)
-    structs = :maps.put(module, true, state.structs)
-    {:noreply, %{state | structs: structs}}
-  end
-
-  def handle_cast({:remote_dispatch, module, fa, line, mode}, state) do
-    references = add_reference(state.references, module, mode)
-    state = add_remote_dispatch(state, module, fa, line, mode)
-    {:noreply, %{state | references: references}}
-  end
-
-  def handle_cast({:import_dispatch, module, {function, arity} = fa, line, mode}, state) do
-    state =
-      state
-      |> add_import_dispatch(module, function, arity)
-      |> add_remote_dispatch(module, fa, line, mode)
-
-    {:noreply, state}
-  end
-
-  def handle_cast({:alias_dispatch, module}, state) do
-    {:noreply, %{state | directives: add_dispatch(state.directives, module, :alias)}}
-  end
-
-  def handle_cast({:set_file, file}, state) do
-    {:noreply, %{state | file: file}}
-  end
-
-  def handle_cast(:reset_file, state) do
-    {:noreply, %{state | file: nil}}
-  end
-
-  def handle_cast({:add_import, module, fas, line, warn}, state) do
-    directives =
-      state.directives
-      |> Enum.reject(&match?({{:import, {^module, _, _}}, _}, &1))
-      |> :maps.from_list()
-      |> add_directive(module, line, warn, :import)
-
-    directives =
-      Enum.reduce(fas, directives, fn {function, arity}, directives ->
-        add_directive(directives, {module, function, arity}, line, warn, :import)
-      end)
-
-    {:noreply, %{state | directives: directives}}
-  end
-
-  def handle_cast({:add_alias, module, line, warn}, state) do
-    {:noreply, %{state | directives: add_directive(state.directives, module, line, warn, :alias)}}
-  end
-
-  def handle_cast(:stop, state) do
-    {:stop, :normal, state}
-  end
-
-  @doc false
-  def handle_info(_msg, state) do
-    {:noreply, state}
-  end
-
-  @doc false
-  def terminate(_reason, _state) do
-    :ok
-  end
-
-  @doc false
-  def code_change(_old, state, _extra) do
-    {:ok, state}
-  end
-
-  defp partition([{remote, :compile} | t], compile, runtime),
-    do: partition(t, [remote | compile], runtime)
-
-  defp partition([{remote, :runtime} | t], compile, runtime),
-    do: partition(t, compile, [remote | runtime])
-
-  defp partition([], compile, runtime), do: {compile, runtime}
-
-  # Callbacks helpers
-
-  defp add_reference(references, module, :compile) when is_atom(module),
-    do: :maps.put(module, :compile, references)
-
-  defp add_reference(references, module, :runtime) when is_atom(module) do
-    case :maps.find(module, references) do
-      {:ok, _} -> references
-      :error -> :maps.put(module, :runtime, references)
-    end
-  end
-
-  defp add_remote_dispatch(state, module, fa, line, mode) when is_atom(module) do
-    location = location(state.file, line)
-
-    map_update(mode, %{module => %{fa => [location]}}, state, fn mode_dispatches ->
-      map_update(module, %{fa => [location]}, mode_dispatches, fn module_dispatches ->
-        map_update(fa, [location], module_dispatches, &[location | List.delete(&1, location)])
-      end)
-    end)
-  end
-
-  defp location(nil, line), do: line
-  defp location(file, line), do: {file, line}
-
-  defp add_import_dispatch(state, module, function, arity) do
-    directives =
-      add_dispatch(state.directives, module, :import)
-      |> add_dispatch({module, function, arity}, :import)
-
-    # Always compile time because we depend
-    # on the module at compile time
-    references = add_reference(state.references, module, :compile)
-
-    %{state | directives: directives, references: references}
-  end
-
-  # In the map we keep imports and aliases.
-  # If the value is a line, it was imported/aliased and has a pending warning
-  # If the value is true, it was imported/aliased and used
-  defp add_directive(directives, module_or_mfa, line, warn, tag) do
-    marker = if warn, do: line, else: true
-    :maps.put({tag, module_or_mfa}, marker, directives)
-  end
-
-  defp add_dispatch(directives, module_or_mfa, tag) do
-    :maps.put({tag, module_or_mfa}, true, directives)
-  end
-
-  defp map_update(key, initial, map, fun) do
-    case :maps.find(key, map) do
-      {:ok, val} -> :maps.put(key, fun.(val), map)
-      :error -> :maps.put(key, initial, map)
-    end
-  end
-end

lib/elixir/lib/kernel/parallel_compiler.ex

@@ -1,528 +0,0 @@
-defmodule Kernel.ParallelCompiler do
-  @moduledoc """
-  A module responsible for compiling and requiring files in parallel.
-  """
-
-  @doc """
-  Starts a task for parallel compilation.
-
-  If you have a file that needs to compile other modules in parallel,
-  the spawned processes need to be aware of the compiler environment.
-  This function allows a developer to create a task that is aware of
-  those environments.
-
-  See `Task.async/1` for more information. The task spawned must be
-  always awaited on by calling `Task.await/1`
-  """
-  @doc since: "1.6.0"
-  def async(fun) when is_function(fun) do
-    if parent = :erlang.get(:elixir_compiler_pid) do
-      file = :erlang.get(:elixir_compiler_file)
-      dest = :erlang.get(:elixir_compiler_dest)
-      {:error_handler, error_handler} = :erlang.process_info(self(), :error_handler)
-
-      Task.async(fn ->
-        :erlang.put(:elixir_compiler_pid, parent)
-        :erlang.put(:elixir_compiler_file, file)
-        dest != :undefined and :erlang.put(:elixir_compiler_dest, dest)
-        :erlang.process_flag(:error_handler, error_handler)
-        fun.()
-      end)
-    else
-      raise ArgumentError,
-            "cannot spawn parallel compiler task because " <>
-              "the current file is not being compiled/required"
-    end
-  end
-
-  @doc """
-  Compiles the given files.
-
-  Those files are compiled in parallel and can automatically
-  detect dependencies between them. Once a dependency is found,
-  the current file stops being compiled until the dependency is
-  resolved.
-
-  It returns `{:ok, modules, warnings}` or `{:error, errors, warnings}`.
-
-  Both errors and warnings are a list of three-element tuples containing
-  the file, line and the formatted error/warning.
-
-  ## Options
-
-    * `:each_file` - for each file compiled, invokes the callback passing the
-      file
-
-    * `:each_long_compilation` - for each file that takes more than a given
-      timeout (see the `:long_compilation_threshold` option) to compile, invoke
-      this callback passing the file as its argument
-
-    * `:each_module` - for each module compiled, invokes the callback passing
-      the file, module and the module bytecode
-
-    * `:each_cycle` - after the given files are compiled, invokes this function
-      that return a list with potentially more files to compile
-
-    * `:long_compilation_threshold` - the timeout (in seconds) after the
-      `:each_long_compilation` callback is invoked; defaults to `15`
-
-    * `:dest` - the destination directory for the BEAM files. When using `files/2`,
-      this information is only used to properly annotate the BEAM files before
-      they are loaded into memory. If you want a file to actually be written to
-      `dest`, use `compile_to_path/3` instead.
-
-  """
-  @doc since: "1.6.0"
-  def compile(files, options \\ []) when is_list(options) do
-    spawn_workers(files, :compile, options)
-  end
-
-  @doc since: "1.6.0"
-  def compile_to_path(files, path, options \\ []) when is_binary(path) and is_list(options) do
-    spawn_workers(files, {:compile, path}, options)
-  end
-
-  @doc """
-  Requires the given files in parallel.
-
-  Opposite to compile, dependencies are not attempted to be
-  automatically solved between files.
-
-  It returns `{:ok, modules, warnings}` or `{:error, errors, warnings}`.
-
-  Both errors and warnings are a list of three-element tuples containing
-  the file, line and the formatted error/warning.
-
-  ## Options
-
-    * `:each_file` - for each file compiled, invokes the callback passing the
-      file
-
-    * `:each_module` - for each module compiled, invokes the callback passing
-      the file, module and the module bytecode
-
-  """
-  @doc since: "1.6.0"
-  def require(files, options \\ []) when is_list(options) do
-    spawn_workers(files, :require, options)
-  end
-
-  # TODO: Remove on 2.0
-  @doc false
-  @deprecated "Use Kernel.ParallelCompiler.compile/2 instead"
-  def files(files, options \\ []) when is_list(options) do
-    case spawn_workers(files, :compile, options) do
-      {:ok, modules, _} -> modules
-      {:error, _, _} -> exit({:shutdown, 1})
-    end
-  end
-
-  # TODO: Remove on 2.0
-  @doc false
-  @deprecated "Use Kernel.ParallelCompiler.compile_to_path/2 instead"
-  def files_to_path(files, path, options \\ []) when is_binary(path) and is_list(options) do
-    case spawn_workers(files, {:compile, path}, options) do
-      {:ok, modules, _} -> modules
-      {:error, _, _} -> exit({:shutdown, 1})
-    end
-  end
-
-  defp spawn_workers(files, output, options) do
-    {:module, _} = :code.ensure_loaded(Kernel.ErrorHandler)
-    compiler_pid = self()
-    :elixir_code_server.cast({:reset_warnings, compiler_pid})
-    schedulers = max(:erlang.system_info(:schedulers_online), 2)
-
-    result =
-      spawn_workers(files, [], [], [], [], %{
-        dest: Keyword.get(options, :dest),
-        each_cycle: Keyword.get(options, :each_cycle, fn -> [] end),
-        each_file: Keyword.get(options, :each_file, fn _file -> :ok end),
-        each_long_compilation: Keyword.get(options, :each_long_compilation, fn _file -> :ok end),
-        each_module: Keyword.get(options, :each_module, fn _file, _module, _binary -> :ok end),
-        output: output,
-        long_compilation_threshold: Keyword.get(options, :long_compilation_threshold, 15),
-        schedulers: schedulers
-      })
-
-    # In case --warning-as-errors is enabled and there was a warning,
-    # compilation status will be set to error.
-    compilation_status = :elixir_code_server.call({:compilation_status, compiler_pid})
-
-    case {result, compilation_status} do
-      {{:ok, _, warnings}, :error} ->
-        message = "Compilation failed due to warnings while using the --warnings-as-errors option"
-        IO.puts(:stderr, message)
-        {:error, warnings, []}
-
-      {{:error, errors, warnings}, :error} ->
-        {:error, errors ++ warnings, []}
-
-      _ ->
-        result
-    end
-  end
-
-  # We already have n=schedulers currently running, don't spawn new ones
-  defp spawn_workers(files, waiting, queued, result, warnings, %{schedulers: schedulers} = state)
-       when length(queued) - length(waiting) >= schedulers do
-    wait_for_messages(files, waiting, queued, result, warnings, state)
-  end
-
-  # Release waiting processes
-  defp spawn_workers([{ref, found} | t], waiting, queued, result, warnings, state) do
-    waiting =
-      case List.keytake(waiting, ref, 2) do
-        {{_kind, pid, ^ref, _on, _defining}, waiting} ->
-          send(pid, {ref, found})
-          waiting
-
-        nil ->
-          waiting
-      end
-
-    spawn_workers(t, waiting, queued, result, warnings, state)
-  end
-
-  defp spawn_workers([file | files], waiting, queued, result, warnings, state) do
-    %{output: output, long_compilation_threshold: threshold, dest: dest} = state
-    parent = self()
-
-    {pid, ref} =
-      :erlang.spawn_monitor(fn ->
-        :erlang.put(:elixir_compiler_pid, parent)
-        :erlang.put(:elixir_compiler_file, file)
-
-        result =
-          try do
-            _ =
-              case output do
-                {:compile, path} ->
-                  :erlang.process_flag(:error_handler, Kernel.ErrorHandler)
-                  :erlang.put(:elixir_compiler_dest, path)
-                  :elixir_compiler.file_to_path(Path.expand(file), path)
-
-                :compile ->
-                  :erlang.process_flag(:error_handler, Kernel.ErrorHandler)
-                  :erlang.put(:elixir_compiler_dest, dest)
-                  Code.compile_file(file)
-
-                :require ->
-                  Code.require_file(file)
-              end
-
-            :ok
-          catch
-            kind, reason ->
-              {kind, reason, __STACKTRACE__}
-          end
-
-        send(parent, {:file_done, self(), file, result})
-        exit(:shutdown)
-      end)
-
-    timer_ref = Process.send_after(self(), {:timed_out, pid}, threshold * 1000)
-    queued = [{pid, ref, file, timer_ref} | queued]
-    spawn_workers(files, waiting, queued, result, warnings, state)
-  end
-
-  # No more files, nothing waiting, queue is empty, this cycle is done
-  defp spawn_workers([], [], [], result, warnings, state) do
-    case state.each_cycle.() do
-      [] ->
-        modules = for {:module, mod} <- result, do: mod
-        warnings = Enum.reverse(warnings)
-        {:ok, modules, warnings}
-
-      more ->
-        spawn_workers(more, [], [], result, warnings, state)
-    end
-  end
-
-  # Queued x, waiting for x: POSSIBLE ERROR! Release processes so we get the failures
-
-  # Single entry, just release it.
-  defp spawn_workers([], [_] = waiting, [_] = queued, result, warnings, state) do
-    [{_, _, ref, _, _}] = waiting
-    spawn_workers([{ref, :not_found}], waiting, queued, result, warnings, state)
-  end
-
-  # Multiple entries, try to release modules.
-  defp spawn_workers([], waiting, queued, result, warnings, state)
-       when length(waiting) == length(queued) do
-    # The goal of this function is to find leaves in the dependency graph,
-    # i.e. to find code that depends on code that we know is not being defined.
-    without_definition =
-      for {pid, _, _, _} <- queued,
-          entry = waiting_on_without_definition(waiting, pid),
-          do: entry
-
-    # Note we only release modules because those can be rescued. A missing
-    # struct is a guaranteed compile error, so we never release it and treat
-    # it exclusively a missing entry/deadlock.
-    pending =
-      for {:module, _, ref, on, _} <- without_definition,
-          do: {on, {ref, :not_found}}
-
-    # Instead of releasing all files at once, we release them in groups
-    # based on the module they are waiting on. We pick the module being
-    # depended on with less edges, as it is the mostly likely source of
-    # error (for example, someone made a typo). This may not always be
-    # true though. For example, if there is a macro injecting code into
-    # multiple modules and such code becomes faulty, now multiple modules
-    # are waiting on the same module required by the faulty code. However,
-    # since we need to pick something to be first, the one with fewer edges
-    # sounds like a sane choice.
-    pending
-    |> Enum.group_by(&elem(&1, 0), &elem(&1, 1))
-    |> Enum.sort_by(&length(elem(&1, 1)))
-    |> case do
-      [{_on, refs} | _] ->
-        spawn_workers(refs, waiting, queued, result, warnings, state)
-
-      [] ->
-        # There is a deadlock. Instead of printing a deadlock, let's release
-        # structs, as a missing struct error is clearer than a deadlock one.
-        structs = for {:struct, _, ref, _, _} <- without_definition, do: {ref, :not_found}
-
-        if structs != [] do
-          spawn_workers(structs, waiting, queued, result, warnings, state)
-        else
-          errors = handle_deadlock(waiting, queued)
-          {:error, errors, warnings}
-        end
-    end
-  end
-
-  # No more files, but queue and waiting are not full or do not match
-  defp spawn_workers([], waiting, queued, result, warnings, state) do
-    wait_for_messages([], waiting, queued, result, warnings, state)
-  end
-
-  defp waiting_on_without_definition(waiting, pid) do
-    {_, ^pid, _, on, _} = entry = List.keyfind(waiting, pid, 1)
-
-    if Enum.any?(waiting, fn {_, _, _, _, defining} -> on in defining end) do
-      nil
-    else
-      entry
-    end
-  end
-
-  # Wait for messages from child processes
-  defp wait_for_messages(files, waiting, queued, result, warnings, state) do
-    %{output: output} = state
-
-    receive do
-      {:struct_available, module} ->
-        available =
-          for {:struct, _, ref, waiting_module, _defining} <- waiting,
-              module == waiting_module,
-              do: {ref, :found}
-
-        result = [{:struct, module} | result]
-        spawn_workers(available ++ files, waiting, queued, result, warnings, state)
-
-      {:module_available, child, ref, file, module, binary} ->
-        state.each_module.(file, module, binary)
-
-        # Release the module loader which is waiting for an ack
-        send(child, {ref, :ack})
-
-        available =
-          for {:module, _, ref, waiting_module, _defining} <- waiting,
-              module == waiting_module,
-              do: {ref, :found}
-
-        cancel_waiting_timer(queued, child)
-
-        result = [{:module, module} | result]
-        spawn_workers(available ++ files, waiting, queued, result, warnings, state)
-
-      # If we are simply requiring files, we do not add to waiting.
-      {:waiting, _kind, child, ref, _on, _defining} when output == :require ->
-        send(child, {ref, :not_found})
-        spawn_workers(files, waiting, queued, result, warnings, state)
-
-      {:waiting, kind, child, ref, on, defining} ->
-        # Oops, we already got it, do not put it on waiting.
-        # Alternatively, we're waiting on ourselves,
-        # send :found so that we can crash with a better error.
-        waiting =
-          if :lists.any(&match?({^kind, ^on}, &1), result) or on in defining do
-            send(child, {ref, :found})
-            waiting
-          else
-            [{kind, child, ref, on, defining} | waiting]
-          end
-
-        spawn_workers(files, waiting, queued, result, warnings, state)
-
-      {:timed_out, child} ->
-        case List.keyfind(queued, child, 0) do
-          {^child, _, file, _} ->
-            state.each_long_compilation.(file)
-
-          _ ->
-            :ok
-        end
-
-        spawn_workers(files, waiting, queued, result, warnings, state)
-
-      {:warning, file, line, message} ->
-        file = file && Path.absname(file)
-        message = :unicode.characters_to_binary(message)
-        warning = {file, line, message}
-        wait_for_messages(files, waiting, queued, result, [warning | warnings], state)
-
-      {:file_done, child_pid, file, :ok} ->
-        discard_down(child_pid)
-        state.each_file.(file)
-        cancel_waiting_timer(queued, child_pid)
-
-        # Sometimes we may have spurious entries in the waiting
-        # list because someone invoked try/rescue UndefinedFunctionError
-        new_files = List.delete(files, child_pid)
-        new_queued = List.keydelete(queued, child_pid, 0)
-        new_waiting = List.keydelete(waiting, child_pid, 1)
-        spawn_workers(new_files, new_waiting, new_queued, result, warnings, state)
-
-      {:file_done, child_pid, file, {kind, reason, stack}} ->
-        discard_down(child_pid)
-        print_error(file, kind, reason, stack)
-        cancel_waiting_timer(queued, child_pid)
-
-        queued
-        |> List.keydelete(child_pid, 0)
-        |> terminate()
-
-        {:error, [to_error(file, kind, reason, stack)], warnings}
-
-      {:DOWN, ref, :process, _pid, reason} ->
-        case handle_down(queued, ref, reason) do
-          :ok -> wait_for_messages(files, waiting, queued, result, warnings, state)
-          {:error, errors} -> {:error, errors, warnings}
-        end
-    end
-  end
-
-  defp discard_down(pid) do
-    receive do
-      {:DOWN, _, :process, ^pid, _} -> :ok
-    end
-  end
-
-  defp handle_down(_queued, _ref, :normal) do
-    :ok
-  end
-
-  defp handle_down(queued, ref, reason) do
-    case List.keyfind(queued, ref, 1) do
-      {child_pid, ^ref, file, _timer_ref} ->
-        print_error(file, :exit, reason, [])
-
-        queued
-        |> List.keydelete(child_pid, 0)
-        |> terminate()
-
-        {:error, [to_error(file, :exit, reason, [])]}
-
-      _ ->
-        :ok
-    end
-  end
-
-  defp handle_deadlock(waiting, queued) do
-    deadlock =
-      for {pid, _, file, _} <- queued do
-        {:current_stacktrace, stacktrace} = Process.info(pid, :current_stacktrace)
-        Process.exit(pid, :kill)
-
-        {kind, ^pid, _, on, _} = List.keyfind(waiting, pid, 1)
-        description = "deadlocked waiting on #{kind} #{inspect(on)}"
-        error = CompileError.exception(description: description, file: nil, line: nil)
-        print_error(file, :error, error, stacktrace)
-
-        {file, on, description}
-      end
-
-    IO.puts("""
-
-    Compilation failed because of a deadlock between files.
-    The following files depended on the following modules:
-    """)
-
-    max =
-      deadlock
-      |> Enum.map(&(&1 |> elem(0) |> String.length()))
-      |> Enum.max()
-
-    for {file, mod, _} <- deadlock do
-      IO.puts(["  ", String.pad_leading(file, max), " => " | inspect(mod)])
-    end
-
-    IO.puts(
-      "\nEnsure there are no compile-time dependencies between those files " <>
-        "and that the modules they reference exist and are correctly named\n"
-    )
-
-    for {file, _, description} <- deadlock, do: {Path.absname(file), nil, description}
-  end
-
-  defp terminate(queued) do
-    for {pid, _, _, _} <- queued, do: Process.exit(pid, :kill)
-    for {pid, _, _, _} <- queued, do: discard_down(pid)
-    :ok
-  end
-
-  defp print_error(file, kind, reason, stack) do
-    IO.write([
-      "\n== Compilation error in file #{Path.relative_to_cwd(file)} ==\n",
-      Kernel.CLI.format_error(kind, reason, stack)
-    ])
-  end
-
-  defp cancel_waiting_timer(queued, child_pid) do
-    case List.keyfind(queued, child_pid, 0) do
-      {^child_pid, _ref, _file, timer_ref} ->
-        Process.cancel_timer(timer_ref)
-        # Let's flush the message in case it arrived before we canceled the
-        # timeout.
-        receive do
-          {:timed_out, ^child_pid} -> :ok
-        after
-          0 -> :ok
-        end
-
-      nil ->
-        :ok
-    end
-  end
-
-  defp to_error(file, kind, reason, stack) do
-    line = get_line(file, reason, stack)
-    file = Path.absname(file)
-    message = :unicode.characters_to_binary(Kernel.CLI.format_error(kind, reason, stack))
-    {file, line, message}
-  end
-
-  defp get_line(_file, %{line: line}, _stack) when is_integer(line) and line > 0 do
-    line
-  end
-
-  defp get_line(file, :undef, [{_, _, _, []}, {_, _, _, info} | _]) do
-    if Keyword.get(info, :file) == to_charlist(Path.relative_to_cwd(file)) do
-      Keyword.get(info, :line)
-    end
-  end
-
-  defp get_line(file, _reason, [{_, _, _, info} | _]) do
-    if Keyword.get(info, :file) == to_charlist(Path.relative_to_cwd(file)) do
-      Keyword.get(info, :line)
-    end
-  end
-
-  defp get_line(_, _, _) do
-    nil
-  end
-end

lib/elixir/lib/kernel/parallel_require.ex

@@ -1,18 +0,0 @@
-defmodule Kernel.ParallelRequire do
-  # TODO: Remove on 2.0
-  @moduledoc false
-
-  @deprecated "Use Kernel.ParallelCompiler.require/2 instead"
-  def files(files, callbacks \\ [])
-
-  def files(files, callback) when is_function(callback, 1) do
-    files(files, each_file: callback)
-  end
-
-  def files(files, options) when is_list(options) do
-    case Kernel.ParallelCompiler.require(files, options) do
-      {:ok, modules, _} -> modules
-      {:error, _, _} -> exit({:shutdown, 1})
-    end
-  end
-end

lib/elixir/lib/kernel/typespec.ex

@@ -1,954 +0,0 @@
-defmodule Kernel.Typespec do
-  # TODO: Remove deprecated code on 2.0 and move this module to Module.Typespec.
-  @moduledoc false
-
-  ## Deprecated API moved to Code.Typespec
-
-  @doc false
-  @deprecated "Use Code.Typespec.spec_to_quoted/2 instead"
-  def spec_to_ast(name, spec) do
-    Code.Typespec.spec_to_quoted(name, spec)
-  end
-
-  @doc false
-  @deprecated "Use Code.Typespec.type_to_quoted/1 instead"
-  def type_to_ast(type) do
-    Code.Typespec.type_to_quoted(type)
-  end
-
-  @doc false
-  @deprecated "Use Code.fetch_docs/1 instead"
-  def beam_typedocs(module) when is_atom(module) or is_binary(module) do
-    case Code.fetch_docs(module) do
-      {:docs_v1, _, _, _, _, _, docs} ->
-        for {{:type, name, arity}, _, _, doc, _} <- docs do
-          case doc do
-            :none -> {{name, arity}, nil}
-            :hidden -> {{name, arity}, false}
-            %{"en" => doc_string} -> {{name, arity}, doc_string}
-          end
-        end
-
-      {:error, _} ->
-        nil
-    end
-  end
-
-  @doc false
-  @deprecated "Use Code.Typespec.fetch_types/1 instead"
-  def beam_types(module) when is_atom(module) or is_binary(module) do
-    case Code.Typespec.fetch_types(module) do
-      {:ok, types} -> types
-      :error -> nil
-    end
-  end
-
-  @doc false
-  @deprecated "Use Code.Typespec.fetch_specs/1 instead"
-  def beam_specs(module) when is_atom(module) or is_binary(module) do
-    case Code.Typespec.fetch_specs(module) do
-      {:ok, specs} -> specs
-      :error -> nil
-    end
-  end
-
-  @doc false
-  @deprecated "Use Code.Typespec.fetch_callbacks/1 instead"
-  def beam_callbacks(module) when is_atom(module) or is_binary(module) do
-    case Code.Typespec.fetch_callbacks(module) do
-      {:ok, callbacks} -> callbacks
-      :error -> nil
-    end
-  end
-
-  ## Hooks for Module functions
-
-  def defines_type?(module, {name, arity} = signature)
-      when is_atom(module) and is_atom(name) and arity in 0..255 do
-    {_set, bag} = :elixir_module.data_tables(module)
-
-    finder = fn {_kind, expr, _caller} ->
-      type_to_signature(expr) == signature
-    end
-
-    :lists.any(finder, get_typespecs(bag, [:type, :opaque, :typep]))
-  end
-
-  def spec_to_callback(module, {name, arity} = signature)
-      when is_atom(module) and is_atom(name) and arity in 0..255 do
-    {_set, bag} = :elixir_module.data_tables(module)
-
-    filter = fn {:spec, expr, pos} ->
-      if spec_to_signature(expr) == signature do
-        delete_typespec(bag, :spec, expr, pos)
-        store_typespec(bag, :callback, expr, pos)
-        true
-      else
-        false
-      end
-    end
-
-    :lists.filter(filter, get_typespecs(bag, :spec)) != []
-  end
-
-  ## Typespec definition and storage
-
-  @doc """
-  Defines a typespec.
-
-  Invoked by `Kernel.@/1` expansion.
-  """
-  def deftypespec(:spec, expr, _line, _file, module, pos) do
-    {_set, bag} = :elixir_module.data_tables(module)
-    store_typespec(bag, :spec, expr, pos)
-  end
-
-  def deftypespec(kind, expr, line, _file, module, pos)
-      when kind in [:callback, :macrocallback] do
-    {set, bag} = :elixir_module.data_tables(module)
-
-    case spec_to_signature(expr) do
-      {name, arity} ->
-        {line, doc} = get_doc_info(set, :doc, line)
-        store_doc(set, kind, name, arity, line, :doc, doc, %{})
-
-      :error ->
-        :error
-    end
-
-    store_typespec(bag, kind, expr, pos)
-  end
-
-  def deftypespec(kind, expr, line, file, module, pos)
-      when kind in [:type, :typep, :opaque] do
-    {set, bag} = :elixir_module.data_tables(module)
-
-    case type_to_signature(expr) do
-      {name, arity} when kind == :typep ->
-        {line, doc} = get_doc_info(set, :typedoc, line)
-
-        if doc do
-          warning =
-            "type #{name}/#{arity} is private, @typedoc's are always discarded for private types"
-
-          :elixir_errors.warn(line, file, warning)
-        end
-
-      {name, arity} ->
-        {line, doc} = get_doc_info(set, :typedoc, line)
-        spec_meta = if kind == :opaque, do: %{opaque: true}, else: %{}
-        store_doc(set, :type, name, arity, line, :typedoc, doc, spec_meta)
-
-      :error ->
-        :error
-    end
-
-    store_typespec(bag, kind, expr, pos)
-  end
-
-  defp get_typespecs(bag, keys) when is_list(keys) do
-    :lists.flatmap(&get_typespecs(bag, &1), keys)
-  end
-
-  defp get_typespecs(bag, key) do
-    :ets.lookup_element(bag, {:accumulate, key}, 2)
-  catch
-    :error, :badarg -> []
-  end
-
-  defp take_typespecs(bag, keys) when is_list(keys) do
-    :lists.flatmap(&take_typespecs(bag, &1), keys)
-  end
-
-  defp take_typespecs(bag, key) do
-    :lists.map(&elem(&1, 1), :ets.take(bag, {:accumulate, key}))
-  end
-
-  defp store_typespec(bag, key, expr, pos) do
-    :ets.insert(bag, {{:accumulate, key}, {key, expr, pos}})
-    :ok
-  end
-
-  defp delete_typespec(bag, key, expr, pos) do
-    :ets.delete_object(bag, {{:accumulate, key}, {key, expr, pos}})
-    :ok
-  end
-
-  defp store_doc(set, kind, name, arity, line, doc_kind, doc, spec_meta) do
-    doc_meta = get_doc_meta(spec_meta, doc_kind, set)
-    :ets.insert(set, {{kind, name, arity}, line, doc, doc_meta})
-  end
-
-  defp get_doc_info(set, attr, line) do
-    case :ets.take(set, attr) do
-      [{^attr, {line, doc}, _}] -> {line, doc}
-      [] -> {line, nil}
-    end
-  end
-
-  defp get_doc_meta(spec_meta, doc_kind, set) do
-    case :ets.take(set, {doc_kind, :meta}) do
-      [{{^doc_kind, :meta}, metadata, _}] -> Map.merge(metadata, spec_meta)
-      [] -> spec_meta
-    end
-  end
-
-  defp spec_to_signature({:when, _, [spec, _]}), do: type_to_signature(spec)
-  defp spec_to_signature(other), do: type_to_signature(other)
-
-  defp type_to_signature({:::, _, [{name, _, context}, _]})
-       when is_atom(name) and name != ::: and is_atom(context),
-       do: {name, 0}
-
-  defp type_to_signature({:::, _, [{name, _, args}, _]}) when is_atom(name) and name != :::,
-    do: {name, length(args)}
-
-  defp type_to_signature(_), do: :error
-
-  ## Translation from Elixir AST to typespec AST
-
-  @doc false
-  def translate_typespecs_for_module(_set, bag) do
-    type_typespecs = take_typespecs(bag, [:type, :opaque, :typep])
-    defined_type_pairs = collect_defined_type_pairs(type_typespecs)
-
-    state = %{
-      defined_type_pairs: defined_type_pairs,
-      used_type_pairs: [],
-      local_vars: %{},
-      undefined_type_error_enabled?: true
-    }
-
-    {types, state} = Enum.map_reduce(type_typespecs, state, &translate_type/2)
-    {specs, state} = Enum.map_reduce(take_typespecs(bag, :spec), state, &translate_spec/2)
-    {callbacks, state} = Enum.map_reduce(take_typespecs(bag, :callback), state, &translate_spec/2)
-
-    {macrocallbacks, state} =
-      Enum.map_reduce(take_typespecs(bag, :macrocallback), state, &translate_spec/2)
-
-    optional_callbacks = List.flatten(get_typespecs(bag, :optional_callbacks))
-    used_types = filter_used_types(types, state)
-
-    {used_types, specs, callbacks, macrocallbacks, optional_callbacks}
-  end
-
-  defp collect_defined_type_pairs(type_typespecs) do
-    Enum.reduce(type_typespecs, %{}, fn {_kind, expr, pos}, type_pairs ->
-      %{file: file, line: line} = env = :elixir_locals.get_cached_env(pos)
-
-      case type_to_signature(expr) do
-        {name, arity} = type_pair ->
-          if built_in_type?(name, arity) do
-            message = "type #{name}/#{arity} is a built-in type and it cannot be redefined"
-            compile_error(env, message)
-          end
-
-          if Map.has_key?(type_pairs, type_pair) do
-            compile_error(env, "type #{name}/#{arity} is already defined")
-          end
-
-          Map.put(type_pairs, type_pair, {file, line})
-
-        :error ->
-          compile_error(env, "invalid type specification: #{Macro.to_string(expr)}")
-      end
-    end)
-  end
-
-  defp filter_used_types(types, state) do
-    Enum.filter(types, fn {_kind, {name, arity} = type_pair, _line, _type, export} ->
-      if type_pair not in state.used_type_pairs and not export do
-        %{^type_pair => {file, line}} = state.defined_type_pairs
-        :elixir_errors.warn(line, file, "type #{name}/#{arity} is unused")
-        false
-      else
-        true
-      end
-    end)
-  end
-
-  defp translate_type({kind, {:::, _, [{name, _, args}, definition]}, pos}, state) do
-    caller = :elixir_locals.get_cached_env(pos)
-    state = clean_local_state(state)
-
-    args =
-      if is_atom(args) do
-        []
-      else
-        for(arg <- args, do: variable(arg))
-      end
-
-    vars = for {:var, _, var} <- args, do: var
-    state = Enum.reduce(vars, state, &update_local_vars(&2, &1))
-    {spec, state} = typespec(definition, vars, caller, state)
-    vars = for {:var, _, _} = var <- args, do: var
-    type = {name, spec, vars}
-    arity = length(args)
-
-    ensure_no_unused_local_vars!(caller, state.local_vars)
-
-    {kind, export} =
-      case kind do
-        :type -> {:type, true}
-        :typep -> {:type, false}
-        :opaque -> {:opaque, true}
-      end
-
-    invalid_args = Enum.reject(args, &valid_variable_ast?/1)
-
-    unless invalid_args == [] do
-      invalid_args = invalid_args |> Enum.map(&Macro.to_string/1) |> Enum.join(", ")
-
-      message =
-        "@type definitions expect all arguments to be variables. The type " <>
-          "#{name}/#{arity} has an invalid argument(s): #{invalid_args}"
-
-      compile_error(caller, message)
-    end
-
-    if underspecified?(kind, arity, spec) do
-      message = "@#{kind} type #{name}/#{arity} is underspecified and therefore meaningless"
-      :elixir_errors.warn(caller.line, caller.file, message)
-    end
-
-    {{kind, {name, arity}, caller.line, type, export}, state}
-  end
-
-  defp valid_variable_ast?({variable_name, _, context})
-       when is_atom(variable_name) and is_atom(context),
-       do: true
-
-  defp valid_variable_ast?(_), do: false
-
-  defp underspecified?(:opaque, 0, {:type, _, type, []}) when type in [:any, :term], do: true
-  defp underspecified?(_kind, _arity, _spec), do: false
-
-  defp translate_spec({kind, {:when, _meta, [spec, guard]}, pos}, state) do
-    caller = :elixir_locals.get_cached_env(pos)
-    translate_spec(kind, spec, guard, caller, state)
-  end
-
-  defp translate_spec({kind, spec, pos}, state) do
-    caller = :elixir_locals.get_cached_env(pos)
-    translate_spec(kind, spec, [], caller, state)
-  end
-
-  defp translate_spec(kind, {:::, meta, [{name, _, args}, return]}, guard, caller, state)
-       when is_atom(name) and name != ::: do
-    translate_spec(kind, meta, name, args, return, guard, caller, state)
-  end
-
-  defp translate_spec(_kind, {name, _meta, _args} = spec, _guard, caller, _state)
-       when is_atom(name) and name != ::: do
-    spec = Macro.to_string(spec)
-    compile_error(caller, "type specification missing return type: #{spec}")
-  end
-
-  defp translate_spec(_kind, spec, _guard, caller, _state) do
-    spec = Macro.to_string(spec)
-    compile_error(caller, "invalid type specification: #{spec}")
-  end
-
-  defp translate_spec(kind, meta, name, args, return, guard, caller, state) when is_atom(args),
-    do: translate_spec(kind, meta, name, [], return, guard, caller, state)
-
-  defp translate_spec(kind, meta, name, args, return, guard, caller, state) do
-    ensure_no_defaults!(args)
-    state = clean_local_state(state)
-
-    unless Keyword.keyword?(guard) do
-      error = "expected keywords as guard in type specification, got: #{Macro.to_string(guard)}"
-      compile_error(caller, error)
-    end
-
-    line = line(meta)
-    vars = Keyword.keys(guard)
-    {fun_args, state} = fn_args(meta, args, return, vars, caller, state)
-    spec = {:type, line, :fun, fun_args}
-
-    {spec, state} =
-      case guard_to_constraints(guard, vars, meta, caller, state) do
-        {[], state} -> {spec, state}
-        {constraints, state} -> {{:type, line, :bounded_fun, [spec, constraints]}, state}
-      end
-
-    ensure_no_unused_local_vars!(caller, state.local_vars)
-
-    arity = length(args)
-    {{kind, {name, arity}, caller.line, spec}, state}
-  end
-
-  # TODO: Remove char_list type by 2.0
-  defp built_in_type?(:char_list, 0), do: true
-  defp built_in_type?(:charlist, 0), do: true
-  defp built_in_type?(:as_boolean, 1), do: true
-  defp built_in_type?(:struct, 0), do: true
-  defp built_in_type?(:nonempty_charlist, 0), do: true
-  defp built_in_type?(:keyword, 0), do: true
-  defp built_in_type?(:keyword, 1), do: true
-  defp built_in_type?(:var, 0), do: true
-  defp built_in_type?(name, arity), do: :erl_internal.is_type(name, arity)
-
-  defp ensure_no_defaults!(args) do
-    Enum.each(args, fn
-      {:::, _, [left, right]} ->
-        ensure_not_default(left)
-        ensure_not_default(right)
-        left
-
-      other ->
-        ensure_not_default(other)
-        other
-    end)
-  end
-
-  defp ensure_not_default({:\\, _, [_, _]}) do
-    raise ArgumentError, "default arguments \\\\ not supported in typespecs"
-  end
-
-  defp ensure_not_default(_), do: :ok
-
-  defp guard_to_constraints(guard, vars, meta, caller, state) do
-    line = line(meta)
-
-    Enum.flat_map_reduce(guard, state, fn
-      {_name, {:var, _, context}}, state when is_atom(context) ->
-        {[], state}
-
-      {name, type}, state ->
-        {spec, state} = typespec(type, vars, caller, state)
-        constraint = [{:atom, line, :is_subtype}, [{:var, line, name}, spec]]
-        state = update_local_vars(state, name)
-
-        {[{:type, line, :constraint, constraint}], state}
-    end)
-  end
-
-  ## To typespec conversion
-
-  defp line(meta) do
-    Keyword.get(meta, :line, 0)
-  end
-
-  # Handle unions
-  defp typespec({:|, meta, [_, _]} = exprs, vars, caller, state) do
-    exprs = collect_union(exprs)
-    {union, state} = Enum.map_reduce(exprs, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :union, union}, state}
-  end
-
-  # Handle binaries
-  defp typespec({:<<>>, meta, []}, _, _, state) do
-    line = line(meta)
-    {{:type, line, :binary, [{:integer, line, 0}, {:integer, line, 0}]}, state}
-  end
-
-  defp typespec(
-         {:<<>>, meta, [{:::, unit_meta, [{:_, _, ctx1}, {:*, _, [{:_, _, ctx2}, unit]}]}]},
-         _,
-         _,
-         state
-       )
-       when is_atom(ctx1) and is_atom(ctx2) and is_integer(unit) and unit >= 0 do
-    line = line(meta)
-    {{:type, line, :binary, [{:integer, line, 0}, {:integer, line(unit_meta), unit}]}, state}
-  end
-
-  defp typespec({:<<>>, meta, [{:::, size_meta, [{:_, _, ctx}, size]}]}, _, _, state)
-       when is_atom(ctx) and is_integer(size) and size >= 0 do
-    line = line(meta)
-    {{:type, line, :binary, [{:integer, line(size_meta), size}, {:integer, line, 0}]}, state}
-  end
-
-  defp typespec(
-         {
-           :<<>>,
-           meta,
-           [
-             {:::, size_meta, [{:_, _, ctx1}, size]},
-             {:::, unit_meta, [{:_, _, ctx2}, {:*, _, [{:_, _, ctx3}, unit]}]}
-           ]
-         },
-         _,
-         _,
-         state
-       )
-       when is_atom(ctx1) and is_atom(ctx2) and is_atom(ctx3) and is_integer(size) and
-              is_integer(unit) and size >= 0 and unit >= 0 do
-    args = [{:integer, line(size_meta), size}, {:integer, line(unit_meta), unit}]
-    {{:type, line(meta), :binary, args}, state}
-  end
-
-  defp typespec({:<<>>, _meta, _args}, _vars, caller, _state) do
-    message =
-      "invalid binary specification, expected <<_::size>>, <<_::_*unit>>, " <>
-        "or <<_::size, _::_*unit>> with size and unit being non-negative integers"
-
-    compile_error(caller, message)
-  end
-
-  ## Handle maps and structs
-  defp typespec({:map, meta, args}, _vars, _caller, state) when args == [] or is_atom(args) do
-    {{:type, line(meta), :map, :any}, state}
-  end
-
-  defp typespec({:%{}, meta, fields} = map, vars, caller, state) do
-    {fields, state} =
-      Enum.map_reduce(fields, state, fn
-        {k, v}, state when is_atom(k) ->
-          {arg1, state} = typespec(k, vars, caller, state)
-          {arg2, state} = typespec(v, vars, caller, state)
-          {{:type, line(meta), :map_field_exact, [arg1, arg2]}, state}
-
-        {{:required, meta2, [k]}, v}, state ->
-          {arg1, state} = typespec(k, vars, caller, state)
-          {arg2, state} = typespec(v, vars, caller, state)
-          {{:type, line(meta2), :map_field_exact, [arg1, arg2]}, state}
-
-        {{:optional, meta2, [k]}, v}, state ->
-          {arg1, state} = typespec(k, vars, caller, state)
-          {arg2, state} = typespec(v, vars, caller, state)
-          {{:type, line(meta2), :map_field_assoc, [arg1, arg2]}, state}
-
-        {k, v}, state ->
-          # TODO: Warn on Elixir v1.8 (since v1.6 is the first version to drop support for 18 and
-          # older)
-          # warning =
-          #   "invalid map specification. %{foo => bar} is deprecated in favor of " <>
-          #   "%{required(foo) => bar} and %{optional(foo) => bar}."
-          # :elixir_errors.warn(caller.line, caller.file, warning)
-          {arg1, state} = typespec(k, vars, caller, state)
-          {arg2, state} = typespec(v, vars, caller, state)
-          {{:type, line(meta), :map_field_assoc, [arg1, arg2]}, state}
-
-        {:|, _, [_, _]}, _state ->
-          error =
-            "invalid map specification. When using the | operator in the map key, " <>
-              "make sure to wrap the key type in parentheses: #{Macro.to_string(map)}"
-
-          compile_error(caller, error)
-
-        _, _state ->
-          compile_error(caller, "invalid map specification: #{Macro.to_string(map)}")
-      end)
-
-    {{:type, line(meta), :map, fields}, state}
-  end
-
-  defp typespec({:%, _, [name, {:%{}, meta, fields}]}, vars, caller, state) do
-    # We cannot set a function name to avoid tracking
-    # as a compile time dependency, because for structs it actually is one.
-    module = Macro.expand(name, caller)
-
-    struct =
-      module
-      |> Macro.struct!(caller)
-      |> Map.from_struct()
-      |> Map.to_list()
-
-    unless Keyword.keyword?(fields) do
-      compile_error(caller, "expected key-value pairs in struct #{Macro.to_string(name)}")
-    end
-
-    types =
-      Enum.map(struct, fn {field, _} ->
-        {field, Keyword.get(fields, field, quote(do: term()))}
-      end)
-
-    Enum.each(fields, fn {field, _} ->
-      unless Keyword.has_key?(struct, field) do
-        compile_error(
-          caller,
-          "undefined field #{inspect(field)} on struct #{Macro.to_string(name)}"
-        )
-      end
-    end)
-
-    typespec({:%{}, meta, [__struct__: module] ++ types}, vars, caller, state)
-  end
-
-  # Handle records
-  defp typespec({:record, meta, [atom]}, vars, caller, state) when is_atom(atom) do
-    typespec({:record, meta, [atom, []]}, vars, caller, state)
-  end
-
-  defp typespec({:record, meta, [tag, field_specs]}, vars, caller, state) when is_atom(tag) do
-    # We cannot set a function name to avoid tracking
-    # as a compile time dependency because for records it actually is one.
-    case Macro.expand({tag, [], [{:{}, [], []}]}, caller) do
-      {_, _, [name, fields | _]} when is_list(fields) ->
-        types =
-          Enum.map(fields, fn {field, _} ->
-            Keyword.get(field_specs, field, quote(do: term()))
-          end)
-
-        Enum.each(field_specs, fn {field, _} ->
-          unless Keyword.has_key?(fields, field) do
-            compile_error(caller, "undefined field #{field} on record #{inspect(tag)}")
-          end
-        end)
-
-        typespec({:{}, meta, [name | types]}, vars, caller, state)
-
-      _ ->
-        compile_error(caller, "unknown record #{inspect(tag)}")
-    end
-  end
-
-  defp typespec({:record, _meta, _args}, _vars, caller, _state) do
-    compile_error(caller, "invalid record specification, expected the record name to be an atom")
-  end
-
-  # Handle ranges
-  defp typespec({:.., meta, [left, right]}, vars, caller, state) do
-    {left, state} = typespec(left, vars, caller, state)
-    {right, state} = typespec(right, vars, caller, state)
-    :ok = validate_range(left, right, caller)
-
-    {{:type, line(meta), :range, [left, right]}, state}
-  end
-
-  # Handle special forms
-  defp typespec({:__MODULE__, _, atom}, vars, caller, state) when is_atom(atom) do
-    typespec(caller.module, vars, caller, state)
-  end
-
-  defp typespec({:__aliases__, _, _} = alias, vars, caller, state) do
-    # We set a function name to avoid tracking
-    # aliases in typespecs as compile time dependencies.
-    atom = Macro.expand(alias, %{caller | function: {:typespec, 0}})
-    typespec(atom, vars, caller, state)
-  end
-
-  # Handle funs
-  defp typespec([{:->, meta, [arguments, return]}], vars, caller, state)
-       when is_list(arguments) do
-    {args, state} = fn_args(meta, arguments, return, vars, caller, state)
-    {{:type, line(meta), :fun, args}, state}
-  end
-
-  # Handle type operator
-  defp typespec(
-         {:::, meta, [{var_name, var_meta, context}, expr]} = ann_type,
-         vars,
-         caller,
-         state
-       )
-       when is_atom(var_name) and is_atom(context) do
-    case typespec(expr, vars, caller, state) do
-      {{:ann_type, _, _}, _state} ->
-        message =
-          "invalid type annotation. Type annotations cannot be nested: " <>
-            "#{Macro.to_string(ann_type)}"
-
-        # TODO: make this an error in elixir 2.0 and remove the code below
-        :elixir_errors.warn(caller.line, caller.file, message)
-
-        # This may be generating an invalid typespec but we need to generate it
-        # to avoid breaking existing code that was valid but only broke dialyzer
-        {right, state} = typespec(expr, vars, caller, state)
-        {{:ann_type, line(meta), [{:var, line(var_meta), var_name}, right]}, state}
-
-      {right, state} ->
-        {{:ann_type, line(meta), [{:var, line(var_meta), var_name}, right]}, state}
-    end
-  end
-
-  defp typespec({:::, meta, [left, right]} = expr, vars, caller, state) do
-    message =
-      "invalid type annotation. When using the | operator to represent the union of types, " <>
-        "make sure to wrap type annotations in parentheses: #{Macro.to_string(expr)}"
-
-    # TODO: make this an error in Elixir 2.0, and remove the code below and the
-    # :undefined_type_error_enabled? key from the state
-    :elixir_errors.warn(caller.line, caller.file, message)
-
-    # This may be generating an invalid typespec but we need to generate it
-    # to avoid breaking existing code that was valid but only broke dialyzer
-    state = %{state | undefined_type_error_enabled?: false}
-    {left, state} = typespec(left, vars, caller, state)
-    state = %{state | undefined_type_error_enabled?: true}
-    {right, state} = typespec(right, vars, caller, state)
-    {{:ann_type, line(meta), [left, right]}, state}
-  end
-
-  # Handle unary ops
-  defp typespec({op, meta, [integer]}, _, _, state) when op in [:+, :-] and is_integer(integer) do
-    line = line(meta)
-    {{:op, line, op, {:integer, line, integer}}, state}
-  end
-
-  # Handle remote calls in the form of @module_attribute.type.
-  # These are not handled by the general remote type clause as calling
-  # Macro.expand/2 on the remote does not expand module attributes (but expands
-  # things like __MODULE__).
-  defp typespec(
-         {{:., meta, [{:@, _, [{attr, _, _}]}, name]}, _, args} = orig,
-         vars,
-         caller,
-         state
-       ) do
-    remote = Module.get_attribute(caller.module, attr)
-
-    unless is_atom(remote) and remote != nil do
-      message =
-        "invalid remote in typespec: #{Macro.to_string(orig)} (@#{attr} is #{inspect(remote)})"
-
-      compile_error(caller, message)
-    end
-
-    {remote_spec, state} = typespec(remote, vars, caller, state)
-    {name_spec, state} = typespec(name, vars, caller, state)
-    type = {remote_spec, meta, name_spec, args}
-    remote_type(type, vars, caller, state)
-  end
-
-  # Handle remote calls
-  defp typespec({{:., meta, [remote, name]}, _, args} = orig, vars, caller, state) do
-    # We set a function name to avoid tracking
-    # aliases in typespecs as compile time dependencies.
-    remote = Macro.expand(remote, %{caller | function: {:typespec, 0}})
-
-    unless is_atom(remote) do
-      compile_error(caller, "invalid remote in typespec: #{Macro.to_string(orig)}")
-    end
-
-    {remote_spec, state} = typespec(remote, vars, caller, state)
-    {name_spec, state} = typespec(name, vars, caller, state)
-    type = {remote_spec, meta, name_spec, args}
-    remote_type(type, vars, caller, state)
-  end
-
-  # Handle tuples
-  defp typespec({:tuple, meta, []}, _vars, _caller, state) do
-    {{:type, line(meta), :tuple, :any}, state}
-  end
-
-  defp typespec({:{}, meta, t}, vars, caller, state) when is_list(t) do
-    {args, state} = Enum.map_reduce(t, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :tuple, args}, state}
-  end
-
-  defp typespec({left, right}, vars, caller, state) do
-    typespec({:{}, [], [left, right]}, vars, caller, state)
-  end
-
-  # Handle blocks
-  defp typespec({:__block__, _meta, [arg]}, vars, caller, state) do
-    typespec(arg, vars, caller, state)
-  end
-
-  # Handle variables or local calls
-  defp typespec({name, meta, atom}, vars, caller, state) when is_atom(atom) do
-    if name in vars do
-      state = update_local_vars(state, name)
-      {{:var, line(meta), name}, state}
-    else
-      typespec({name, meta, []}, vars, caller, state)
-    end
-  end
-
-  # Handle local calls
-  defp typespec({:string, meta, arguments}, vars, caller, state) do
-    warning =
-      "string() type use is discouraged. " <>
-        "For character lists, use charlist() type, for strings, String.t()\n" <>
-        Exception.format_stacktrace(Macro.Env.stacktrace(caller))
-
-    :elixir_errors.warn(caller.line, caller.file, warning)
-
-    {arguments, state} = Enum.map_reduce(arguments, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :string, arguments}, state}
-  end
-
-  defp typespec({:nonempty_string, meta, arguments}, vars, caller, state) do
-    warning =
-      "nonempty_string() type use is discouraged. " <>
-        "For non-empty character lists, use nonempty_charlist() type, for strings, String.t()\n" <>
-        Exception.format_stacktrace(Macro.Env.stacktrace(caller))
-
-    :elixir_errors.warn(caller.line, caller.file, warning)
-
-    {arguments, state} = Enum.map_reduce(arguments, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :nonempty_string, arguments}, state}
-  end
-
-  # TODO: Remove char_list type by 2.0
-  defp typespec({type, _meta, []}, vars, caller, state) when type in [:charlist, :char_list] do
-    if type == :char_list do
-      warning = "the char_list() type is deprecated, use charlist()"
-      :elixir_errors.warn(caller.line, caller.file, warning)
-    end
-
-    typespec(quote(do: :elixir.charlist()), vars, caller, state)
-  end
-
-  defp typespec({:nonempty_charlist, _meta, []}, vars, caller, state) do
-    typespec(quote(do: :elixir.nonempty_charlist()), vars, caller, state)
-  end
-
-  defp typespec({:struct, _meta, []}, vars, caller, state) do
-    typespec(quote(do: :elixir.struct()), vars, caller, state)
-  end
-
-  defp typespec({:as_boolean, _meta, [arg]}, vars, caller, state) do
-    typespec(quote(do: :elixir.as_boolean(unquote(arg))), vars, caller, state)
-  end
-
-  defp typespec({:keyword, _meta, args}, vars, caller, state) when length(args) <= 1 do
-    typespec(quote(do: :elixir.keyword(unquote_splicing(args))), vars, caller, state)
-  end
-
-  defp typespec({:fun, meta, args}, vars, caller, state) do
-    {args, state} = Enum.map_reduce(args, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :fun, args}, state}
-  end
-
-  defp typespec({name, meta, arguments}, vars, caller, state) do
-    {arguments, state} = Enum.map_reduce(arguments, state, &typespec(&1, vars, caller, &2))
-    arity = length(arguments)
-
-    case :erl_internal.is_type(name, arity) do
-      true ->
-        {{:type, line(meta), name, arguments}, state}
-
-      false ->
-        if state.undefined_type_error_enabled? and
-             not Map.has_key?(state.defined_type_pairs, {name, arity}) do
-          compile_error(caller, "type #{name}/#{arity} undefined")
-        end
-
-        state =
-          if {name, arity} in state.used_type_pairs do
-            state
-          else
-            %{state | used_type_pairs: [{name, arity} | state.used_type_pairs]}
-          end
-
-        {{:user_type, line(meta), name, arguments}, state}
-    end
-  end
-
-  # Handle literals
-  defp typespec(atom, _, _, state) when is_atom(atom) do
-    {{:atom, 0, atom}, state}
-  end
-
-  defp typespec(integer, _, _, state) when is_integer(integer) do
-    {{:integer, 0, integer}, state}
-  end
-
-  defp typespec([], vars, caller, state) do
-    typespec({nil, [], []}, vars, caller, state)
-  end
-
-  defp typespec([{:..., _, atom}], vars, caller, state) when is_atom(atom) do
-    typespec({:nonempty_list, [], []}, vars, caller, state)
-  end
-
-  defp typespec([spec, {:..., _, atom}], vars, caller, state) when is_atom(atom) do
-    typespec({:nonempty_list, [], [spec]}, vars, caller, state)
-  end
-
-  defp typespec([spec], vars, caller, state) do
-    typespec({:list, [], [spec]}, vars, caller, state)
-  end
-
-  defp typespec(list, vars, caller, state) when is_list(list) do
-    [head | tail] = Enum.reverse(list)
-
-    union =
-      Enum.reduce(tail, validate_kw(head, list, caller), fn elem, acc ->
-        {:|, [], [validate_kw(elem, list, caller), acc]}
-      end)
-
-    typespec({:list, [], [union]}, vars, caller, state)
-  end
-
-  defp typespec(other, _vars, caller, _state) do
-    compile_error(caller, "unexpected expression in typespec: #{Macro.to_string(other)}")
-  end
-
-  ## Helpers
-
-  defp compile_error(caller, desc) do
-    raise CompileError, file: caller.file, line: caller.line, description: desc
-  end
-
-  defp remote_type({remote, meta, name, arguments}, vars, caller, state) do
-    {arguments, state} = Enum.map_reduce(arguments, state, &typespec(&1, vars, caller, &2))
-    {{:remote_type, line(meta), [remote, name, arguments]}, state}
-  end
-
-  defp collect_union({:|, _, [a, b]}), do: [a | collect_union(b)]
-  defp collect_union(v), do: [v]
-
-  defp validate_kw({key, _} = t, _, _caller) when is_atom(key), do: t
-
-  defp validate_kw(_, original, caller) do
-    compile_error(caller, "unexpected list in typespec: #{Macro.to_string(original)}")
-  end
-
-  defp validate_range({:op, _, :-, {:integer, meta, first}}, last, caller) do
-    validate_range({:integer, meta, -first}, last, caller)
-  end
-
-  defp validate_range(first, {:op, _, :-, {:integer, meta, last}}, caller) do
-    validate_range(first, {:integer, meta, -last}, caller)
-  end
-
-  defp validate_range({:integer, _, first}, {:integer, _, last}, _caller) when first < last do
-    :ok
-  end
-
-  defp validate_range(_, _, caller) do
-    message =
-      "invalid range specification, expected both sides to be integers, " <>
-        "with the left side lower than the right side"
-
-    compile_error(caller, message)
-  end
-
-  defp fn_args(meta, args, return, vars, caller, state) do
-    {fun_args, state} = fn_args(meta, args, vars, caller, state)
-    {spec, state} = typespec(return, vars, caller, state)
-
-    case [fun_args, spec] do
-      [{:type, _, :any}, {:type, _, :any, []}] -> {[], state}
-      x -> {x, state}
-    end
-  end
-
-  defp fn_args(meta, [{:..., _, _}], _vars, _caller, state) do
-    {{:type, line(meta), :any}, state}
-  end
-
-  defp fn_args(meta, args, vars, caller, state) do
-    {args, state} = Enum.map_reduce(args, state, &typespec(&1, vars, caller, &2))
-    {{:type, line(meta), :product, args}, state}
-  end
-
-  defp variable({name, meta, args}) when is_atom(name) and is_atom(args) do
-    {:var, line(meta), name}
-  end
-
-  defp variable(expr), do: expr
-
-  defp clean_local_state(state) do
-    %{state | local_vars: %{}}
-  end
-
-  defp update_local_vars(%{local_vars: local_vars} = state, var_name) do
-    case Map.fetch(local_vars, var_name) do
-      {:ok, :used_once} -> %{state | local_vars: Map.put(local_vars, var_name, :used_multiple)}
-      {:ok, :used_multiple} -> state
-      :error -> %{state | local_vars: Map.put(local_vars, var_name, :used_once)}
-    end
-  end
-
-  defp ensure_no_unused_local_vars!(caller, local_vars) do
-    for {name, :used_once} <- local_vars do
-      compile_error(caller, "type variable #{name} is unused")
-    end
-  end
-end

lib/elixir/lib/kernel/utils.ex

@@ -1,279 +0,0 @@
-import Kernel, except: [destructure: 2, defdelegate: 2, defstruct: 2]
-
-defmodule Kernel.Utils do
-  @moduledoc false
-
-  @doc """
-  Callback for destructure.
-  """
-  def destructure(list, count)
-      when is_list(list) and is_integer(count) and count >= 0,
-      do: destructure_list(list, count)
-
-  def destructure(nil, count)
-      when is_integer(count) and count >= 0,
-      do: destructure_nil(count)
-
-  defp destructure_list(_, 0), do: []
-  defp destructure_list([], count), do: destructure_nil(count)
-  defp destructure_list([h | t], count), do: [h | destructure_list(t, count - 1)]
-
-  defp destructure_nil(0), do: []
-  defp destructure_nil(count), do: [nil | destructure_nil(count - 1)]
-
-  @doc """
-  Callback for defdelegate.
-  """
-  def defdelegate(fun, opts) when is_list(opts) do
-    # TODO: Remove by 2.0
-    append_first? = Keyword.get(opts, :append_first, false)
-
-    {name, args} =
-      case Macro.decompose_call(fun) do
-        {_, _} = pair -> pair
-        _ -> raise ArgumentError, "invalid syntax in defdelegate #{Macro.to_string(fun)}"
-      end
-
-    as = Keyword.get(opts, :as, name)
-    as_args = build_as_args(args, append_first?)
-
-    {name, args, as, as_args}
-  end
-
-  defp build_as_args(args, append_first?) do
-    as_args = :lists.map(&build_as_arg/1, args)
-
-    case append_first? do
-      true -> tl(as_args) ++ [hd(as_args)]
-      false -> as_args
-    end
-  end
-
-  defp build_as_arg({:\\, _, [arg, _default_arg]}), do: validate_arg(arg)
-  defp build_as_arg(arg), do: validate_arg(arg)
-
-  defp validate_arg({name, _, mod} = arg) when is_atom(name) and is_atom(mod) do
-    arg
-  end
-
-  defp validate_arg(ast) do
-    raise ArgumentError,
-          "defdelegate/2 only accepts function parameters, got: #{Macro.to_string(ast)}"
-  end
-
-  @doc """
-  Callback for defstruct.
-  """
-  def defstruct(module, fields) do
-    case fields do
-      fs when is_list(fs) ->
-        :ok
-
-      other ->
-        raise ArgumentError, "struct fields definition must be list, got: #{inspect(other)}"
-    end
-
-    mapper = fn
-      {key, val} when is_atom(key) ->
-        try do
-          Macro.escape(val)
-        rescue
-          e in [ArgumentError] ->
-            raise ArgumentError, "invalid value for struct field #{key}, " <> Exception.message(e)
-        else
-          _ -> {key, val}
-        end
-
-      key when is_atom(key) ->
-        {key, nil}
-
-      other ->
-        raise ArgumentError, "struct field names must be atoms, got: #{inspect(other)}"
-    end
-
-    fields = :lists.map(mapper, fields)
-    enforce_keys = List.wrap(Module.get_attribute(module, :enforce_keys))
-
-    foreach = fn
-      key when is_atom(key) ->
-        :ok
-
-      key ->
-        raise ArgumentError, "keys given to @enforce_keys must be atoms, got: #{inspect(key)}"
-    end
-
-    :lists.foreach(foreach, enforce_keys)
-
-    struct = :maps.put(:__struct__, module, :maps.from_list(fields))
-    {struct, enforce_keys, Module.get_attribute(module, :derive)}
-  end
-
-  @doc """
-  Announcing callback for defstruct.
-  """
-  def announce_struct(module) do
-    case :erlang.get(:elixir_compiler_pid) do
-      :undefined -> :ok
-      pid -> send(pid, {:struct_available, module})
-    end
-  end
-
-  @doc """
-  Callback for raise.
-  """
-  def raise(msg) when is_binary(msg) do
-    RuntimeError.exception(msg)
-  end
-
-  def raise(module) when is_atom(module) do
-    module.exception([])
-  end
-
-  def raise(%_{__exception__: true} = exception) do
-    exception
-  end
-
-  def raise(other) do
-    ArgumentError.exception(
-      "raise/1 and reraise/2 expect a module name, string or exception " <>
-        "as the first argument, got: #{inspect(other)}"
-    )
-  end
-
-  @doc """
-  Callback for defguard.
-
-  Rewrites an expression so it can be used both inside and outside a guard.
-
-  Take, for example, the expression:
-
-      is_integer(value) and rem(value, 2) == 0
-
-  If we wanted to create a macro, `is_even`, from this expression, that could be
-  used in guards, we'd have to take several things into account.
-
-  First, if this expression is being used inside a guard, `value` needs to be
-  unquoted each place it occurs, since it has not yet been at that point in our
-  macro.
-
-  Secondly, if the expression is being used outside of a guard, we want to unquote
-  `value`, but only once, and then re-use the unquoted form throughout the expression.
-
-  This helper does exactly that: takes the AST for an expression and a list of
-  variable references it should be aware of, and rewrites it into a new expression
-  that checks for its presence in a guard, then unquotes the variable references as
-  appropriate.
-
-  The resulting transformation looks something like this:
-
-      > expression = quote do: is_integer(value) and rem(value, 2) == 0
-      > variable_references = [value: Elixir]
-      > Kernel.Utils.defguard(expression, variable_references) |> Macro.to_string |> IO.puts
-
-      case Macro.Env.in_guard?(__CALLER__) do
-        true ->
-          quote do
-            is_integer(unquote(value)) and rem(unquote(value), 2) == 0
-          end
-
-        false ->
-          quote do
-            value = unquote(value)
-            is_integer(value) and rem(value, 2) == 0
-          end
-      end
-
-  """
-  defmacro defguard(args, expr) do
-    defguard(args, expr, __CALLER__)
-  end
-
-  @spec defguard([Macro.t()], Macro.t(), Macro.Env.t()) :: Macro.t()
-  def defguard(args, expr, env) do
-    {^args, vars} = extract_refs_from_args(args)
-    env = :elixir_env.with_vars(%{env | context: :guard}, vars)
-    {expr, _scope} = :elixir_expand.expand(expr, env)
-
-    quote do
-      case Macro.Env.in_guard?(__CALLER__) do
-        true -> unquote(literal_quote(unquote_every_ref(expr, vars)))
-        false -> unquote(literal_quote(unquote_refs_once(expr, vars)))
-      end
-    end
-  end
-
-  defp extract_refs_from_args(args) do
-    Macro.postwalk(args, [], fn
-      {ref, meta, context} = var, acc when is_atom(ref) and is_atom(context) ->
-        {var, [{ref, var_context(meta, context)} | acc]}
-
-      node, acc ->
-        {node, acc}
-    end)
-  end
-
-  # Finds every reference to `refs` in `guard` and wraps them in an unquote.
-  defp unquote_every_ref(guard, refs) do
-    Macro.postwalk(guard, fn
-      {ref, meta, context} = var when is_atom(ref) and is_atom(context) ->
-        case {ref, var_context(meta, context)} in refs do
-          true -> literal_unquote(var)
-          false -> var
-        end
-
-      node ->
-        node
-    end)
-  end
-
-  # Prefaces `guard` with unquoted versions of `refs`.
-  defp unquote_refs_once(guard, refs) do
-    {guard, used_refs} =
-      Macro.postwalk(guard, %{}, fn
-        {ref, meta, context} = var, acc when is_atom(ref) and is_atom(context) ->
-          pair = {ref, var_context(meta, context)}
-
-          case pair in refs do
-            true ->
-              case acc do
-                %{^pair => {new_var, _}} ->
-                  {new_var, acc}
-
-                %{} ->
-                  generated = String.to_atom("arg" <> Integer.to_string(map_size(acc)))
-                  new_var = Macro.var(generated, Elixir)
-                  {new_var, Map.put(acc, pair, {new_var, var})}
-              end
-
-            false ->
-              {var, acc}
-          end
-
-        node, acc ->
-          {node, acc}
-      end)
-
-    all_used = for ref <- :lists.reverse(refs), used = :maps.get(ref, used_refs, nil), do: used
-    {vars, exprs} = :lists.unzip(all_used)
-
-    quote do
-      {unquote_splicing(vars)} = {unquote_splicing(Enum.map(exprs, &literal_unquote/1))}
-      unquote(guard)
-    end
-  end
-
-  defp literal_quote(ast) do
-    {:quote, [], [[do: ast]]}
-  end
-
-  defp literal_unquote(ast) do
-    {:unquote, [], List.wrap(ast)}
-  end
-
-  defp var_context(meta, kind) do
-    case :lists.keyfind(:counter, 1, meta) do
-      {:counter, counter} -> counter
-      false -> kind
-    end
-  end
-end

lib/elixir/lib/list/chars.ex

@@ -1,62 +0,0 @@
-defprotocol List.Chars do
-  @moduledoc ~S"""
-  The `List.Chars` protocol is responsible for
-  converting a structure to a charlist (only if applicable).
-
-  The only function required to be implemented is
-  `to_charlist/1` which does the conversion.
-
-  The `to_charlist/1` function automatically imported
-  by `Kernel` invokes this protocol.
-  """
-
-  @doc """
-  Converts `term` to a charlist.
-  """
-  @spec to_charlist(t) :: charlist
-  def to_charlist(term)
-
-  @doc false
-  # TODO: Remove by 2.0
-  @deprecated "Use List.Chars.to_charlist/1 instead"
-  Kernel.def to_char_list(term) do
-    __MODULE__.to_charlist(term)
-  end
-end
-
-defimpl List.Chars, for: Atom do
-  def to_charlist(atom), do: Atom.to_charlist(atom)
-end
-
-defimpl List.Chars, for: BitString do
-  @doc """
-  Returns the given binary `term` converted to a charlist.
-  """
-  def to_charlist(term) when is_binary(term) do
-    String.to_charlist(term)
-  end
-
-  def to_charlist(term) do
-    raise Protocol.UndefinedError,
-      protocol: @protocol,
-      value: term,
-      description: "cannot convert a bitstring to a charlist"
-  end
-end
-
-defimpl List.Chars, for: List do
-  # Note that same inlining is used for the rewrite rule.
-  def to_charlist(list), do: list
-end
-
-defimpl List.Chars, for: Integer do
-  def to_charlist(term) do
-    Integer.to_charlist(term)
-  end
-end
-
-defimpl List.Chars, for: Float do
-  def to_charlist(term) do
-    :io_lib_format.fwrite_g(term)
-  end
-end

lib/elixir/lib/macro/env.ex

@@ -1,213 +0,0 @@
-defmodule Macro.Env do
-  @moduledoc """
-  A struct that holds compile time environment information.
-
-  The current environment can be accessed at any time as
-  `__ENV__/0`. Inside macros, the caller environment can be
-  accessed as `__CALLER__/0`.
-
-  An instance of `Macro.Env` must not be modified by hand. If you need to
-  create a custom environment to pass to `Code.eval_quoted/3`, use the
-  following trick:
-
-      def make_custom_env do
-        import SomeModule, only: [some_function: 2]
-        alias A.B.C
-        __ENV__
-      end
-
-  You may then call `make_custom_env()` to get a struct with the desired
-  imports and aliases included.
-
-  It contains the following fields:
-
-    * `module` - the current module name
-    * `file` - the current file name as a binary
-    * `line` - the current line as an integer
-    * `function` - a tuple as `{atom, integer}`, where the first
-      element is the function name and the second its arity; returns
-      `nil` if not inside a function
-    * `context` - the context of the environment; it can be `nil`
-      (default context), `:guard` (inside a guard) or `:match` (inside a match)
-    * `aliases` -  a list of two-element tuples, where the first
-      element is the aliased name and the second one the actual name
-    * `requires` - the list of required modules
-    * `functions` - a list of functions imported from each module
-    * `macros` - a list of macros imported from each module
-    * `macro_aliases` - a list of aliases defined inside the current macro
-    * `context_modules` - a list of modules defined in the current context
-    * `lexical_tracker` - PID of the lexical tracker which is responsible for
-      keeping user info
-
-  The following fields pertain to variable handling and must not be accessed or
-  relied on. To get a list of all variables, see `vars/1`:
-
-    * `current_vars`
-    * `unused_vars`
-    * `prematch_vars`
-    * `contextual_vars`
-
-  The following fields are deprecated and must not be accessed or relied on:
-
-    * `vars` - a list keeping all defined variables as `{var, context}`
-
-  """
-
-  @type name_arity :: {atom, arity}
-  @type file :: binary
-  @type line :: non_neg_integer
-  @type aliases :: [{module, module}]
-  @type macro_aliases :: [{module, {term, module}}]
-  @type context :: :match | :guard | nil
-  @type requires :: [module]
-  @type functions :: [{module, [name_arity]}]
-  @type macros :: [{module, [name_arity]}]
-  @type context_modules :: [module]
-  @type lexical_tracker :: pid | nil
-  @type variable :: {atom, atom | term}
-
-  @typep vars :: [variable]
-  @typep var_type :: :term
-  @typep var_version :: non_neg_integer
-  @typep unused_vars :: %{{variable, var_version} => non_neg_integer | false}
-  @typep current_vars :: %{variable => {var_version, var_type}}
-  @typep prematch_vars :: current_vars | :warn | :raise | :pin | :apply
-  @typep contextual_vars :: [atom]
-
-  @type t :: %{
-          __struct__: __MODULE__,
-          module: atom,
-          file: file,
-          line: line,
-          function: name_arity | nil,
-          context: context,
-          requires: requires,
-          aliases: aliases,
-          functions: functions,
-          macros: macros,
-          macro_aliases: aliases,
-          context_modules: context_modules,
-          vars: vars,
-          unused_vars: unused_vars,
-          current_vars: current_vars,
-          prematch_vars: prematch_vars,
-          lexical_tracker: lexical_tracker,
-          contextual_vars: contextual_vars
-        }
-
-  # TODO: Remove :vars field on v2.0
-  def __struct__ do
-    %{
-      __struct__: __MODULE__,
-      module: nil,
-      file: "nofile",
-      line: 0,
-      function: nil,
-      context: nil,
-      requires: [],
-      aliases: [],
-      functions: [],
-      macros: [],
-      macro_aliases: [],
-      context_modules: [],
-      vars: [],
-      unused_vars: %{},
-      current_vars: %{},
-      prematch_vars: :warn,
-      lexical_tracker: nil,
-      contextual_vars: []
-    }
-  end
-
-  def __struct__(kv) do
-    Enum.reduce(kv, __struct__(), fn {k, v}, acc -> :maps.update(k, v, acc) end)
-  end
-
-  @doc """
-  Returns a list of variables in the current environment.
-
-  Each variable is identified by a tuple of two elements,
-  where the first element is the variable name as an atom
-  and the second element is its context, which may be an
-  atom or an integer.
-  """
-  @doc since: "1.7.0"
-  @spec vars(t) :: [variable]
-  def vars(env)
-
-  def vars(%{__struct__: Macro.Env, current_vars: current_vars}) do
-    Map.keys(current_vars)
-  end
-
-  @doc """
-  Checks if a variable belongs to the environment.
-  """
-  @doc since: "1.7.0"
-  @spec has_var?(t, variable) :: boolean()
-  def has_var?(env, var)
-
-  def has_var?(%{__struct__: Macro.Env, current_vars: current_vars}, var) do
-    Map.has_key?(current_vars, var)
-  end
-
-  @doc """
-  Returns a keyword list containing the file and line
-  information as keys.
-  """
-  @spec location(t) :: keyword
-  def location(env)
-
-  def location(%{__struct__: Macro.Env, file: file, line: line}) do
-    [file: file, line: line]
-  end
-
-  @doc """
-  Returns a `Macro.Env` in the match context.
-  """
-  @spec to_match(t) :: t
-  def to_match(%{__struct__: Macro.Env, context: :match} = env) do
-    env
-  end
-
-  def to_match(%{__struct__: Macro.Env, current_vars: vars} = env) do
-    %{env | context: :match, prematch_vars: vars}
-  end
-
-  @doc """
-  Returns whether the compilation environment is currently
-  inside a guard.
-  """
-  @spec in_guard?(t) :: boolean
-  def in_guard?(env)
-  def in_guard?(%{__struct__: Macro.Env, context: context}), do: context == :guard
-
-  @doc """
-  Returns whether the compilation environment is currently
-  inside a match clause.
-  """
-  @spec in_match?(t) :: boolean
-  def in_match?(env)
-  def in_match?(%{__struct__: Macro.Env, context: context}), do: context == :match
-
-  @doc """
-  Returns the environment stacktrace.
-  """
-  @spec stacktrace(t) :: list
-  def stacktrace(%{__struct__: Macro.Env} = env) do
-    cond do
-      is_nil(env.module) ->
-        [{:elixir_compiler, :__FILE__, 1, relative_location(env)}]
-
-      is_nil(env.function) ->
-        [{env.module, :__MODULE__, 0, relative_location(env)}]
-
-      true ->
-        {name, arity} = env.function
-        [{env.module, name, arity, relative_location(env)}]
-    end
-  end
-
-  defp relative_location(env) do
-    [file: String.to_charlist(Path.relative_to_cwd(env.file)), line: env.line]
-  end
-end