Implement use as a very simply hook mechanism.

RELEASE.md

@@ -14,7 +14,7 @@ This document simply outlines the release process:
 
 ## Places where version is mentioned
 
-* ebin/elixir.app
+* src/elixir.app.src
 * lib/code.ex
 * README
 * CHANGELOG

lib/ex_unit/case.ex

@@ -1,15 +1,13 @@
 module ExUnit::Case
 
-defmacro prepare(opts // []) do
-  sync = Orddict.fetch(opts, :sync, false)
+defmacro __using__(module, opts // []) do
+  if Orddict.fetch(opts, :sync, false) do
+    ExUnit::Server.add_sync_case(module)
+  else:
+    ExUnit::Server.add_case(module)
+  end
 
   quote do
-    if unquote(sync) do
-      ExUnit::Server.add_sync_case(__MODULE__)
-    else:
-      ExUnit::Server.add_case(__MODULE__)
-    end
-
     def __tests__ do
       ExUnit::Case.tests_for(__MODULE__)
     end

src/elixir_translator.erl

@@ -105,6 +105,15 @@ translate_each({'{}', Line, Args}, S) when is_list(Args) ->
 
 %% Modules
 
+translate_each({use, Line, [Ref|Args]}, S) ->
+  case S#elixir_scope.module of
+    {0,nil} ->
+      elixir_errors:syntax_error(Line, S#elixir_scope.filename, "invalid scope for: ", "use");
+    {_,Module} ->
+      Call = { { '.', Line, [Ref, '__using__'] }, Line, [Module|Args] },
+      translate_each(Call, S)
+  end;
+
 translate_each({module, Line, [Ref|Tail]}, S) ->
   case S#elixir_scope.function of
     [] ->

test/elixir/assertion_test.exs

@@ -1,6 +1,6 @@
 module AssertionTest
 
-ExUnit::Case.prepare
+use ExUnit::Case
 
 def test_always_pass do
   true = true

test/elixir/elixir/errors_test.exs

@@ -4,7 +4,7 @@ module __MODULE__ :: UnproperMacro do
   defmacro unproper(args), do: args
 end
 
-ExUnit::Case.prepare
+use ExUnit::Case
 
 def test_invalid_token do
   "nofile:1: invalid token: \end" = format_catch '\end'