From 7ab19565daede1f649dceab8a2b2914bebc68836 Mon Sep 17 00:00:00 2001
From: "Julian Doherty (madlep)" <madlep@madlep.com>
Date: Sat, 20 Jul 2013 21:04:20 +1000
Subject: [PATCH] reverse @__behaviour_docs__

These are top accumlated as module attributes, so are therefore stored
in reverse order to how they were added. When we get them back out,
reverse them again so they're back in the right order.

This is used by ex_doc, and callbacks are listed backwards otherwise
---
 lib/elixir/lib/behaviour.ex               |  2 +-
 lib/elixir/test/elixir/behaviour_test.exs | 18 +++++++++++++-----
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/lib/elixir/lib/behaviour.ex b/lib/elixir/lib/behaviour.ex
index bdde6b594e5..c58cd2574e3 100644
--- a/lib/elixir/lib/behaviour.ex
+++ b/lib/elixir/lib/behaviour.ex
@@ -109,7 +109,7 @@ defmodule Behaviour do
       end
 
       def __behaviour__(:docs) do
-        @__behaviour_docs__
+         Enum.reverse(@__behaviour_docs__)
       end
     end
   end
diff --git a/lib/elixir/test/elixir/behaviour_test.exs b/lib/elixir/test/elixir/behaviour_test.exs
index 11a111c2383..facc54b34c9 100644
--- a/lib/elixir/test/elixir/behaviour_test.exs
+++ b/lib/elixir/test/elixir/behaviour_test.exs
@@ -6,27 +6,35 @@ defmodule BehaviourTest do
   defmodule Sample do
     use Behaviour
 
+    @doc "I should be first."
+    defcallback first(integer) :: integer
+
     @doc "Foo"
     defcallback foo(atom, binary) :: binary
 
     @doc "Bar"
     defcallback bar(External.hello, my_var :: binary) :: binary
+
+    @doc "I should be last."
+    defcallback last(integer) :: integer
   end
 
   test :docs do
-    docs = Enum.sort(Sample.__behaviour__(:docs))
+    docs = Sample.__behaviour__(:docs)
     assert docs == [
-      {{:bar, 2}, 13, "Bar"},
-      {{:foo, 2}, 10, "Foo"}
+      {{:first, 1}, 10, "I should be first."},
+      {{:foo, 2}, 13, "Foo"},
+      {{:bar, 2}, 16, "Bar"},
+      {{:last, 1}, 19, "I should be last."}
     ]
   end
 
   test :callbacks do
-    assert Sample.__behaviour__(:callbacks) == [foo: 2, bar: 2]
+    assert Sample.__behaviour__(:callbacks) == [first: 1, foo: 2, bar: 2, last: 1]
   end
 
   test :specs do
-    assert length(Keyword.get_values(Sample.module_info[:attributes], :callback)) == 2
+    assert length(Keyword.get_values(Sample.module_info[:attributes], :callback)) == 4
   end
 
   test :default_is_not_supported do