From 2aee6bdf2dff13748af465e53dd13ba67f2db348 Mon Sep 17 00:00:00 2001
From: Yurii Rashkovskii <yrashk@gmail.com>
Date: Fri, 30 Nov 2012 01:53:05 -0800
Subject: [PATCH] Add support for h(function_name) helper in IEx

Allows printing documentation for IEx helpers and Kernel's functions/macros without specifying arity.
---
 lib/iex/lib/iex/helpers.ex | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/iex/lib/iex/helpers.ex b/lib/iex/lib/iex/helpers.ex
index d1d09698bb..5d8fa9dee9 100644
--- a/lib/iex/lib/iex/helpers.ex
+++ b/lib/iex/lib/iex/helpers.ex
@@ -117,6 +117,13 @@ defmodule IEx.Helpers do
     end
   end
 
+  defmacro h({ name, _, args }) when args in [nil, []] do
+    quote do
+      h(unquote(__MODULE__), unquote(name))
+      h(Kernel, unquote(name))
+    end
+  end
+
   defmacro h(other) do
     quote do
       h(unquote(other), [])