Allow operators to be captured, example: &+/2

Author: José Valim

lib/elixir/src/elixir_tokenizer.erl

@@ -493,13 +493,19 @@ handle_unary_op([$:|Rest], Line, _Kind, Op, Scope, Tokens) when ?is_space(hd(Res
   tokenize(Rest, Line, Scope, [{ kw_identifier, Line, Op }|Tokens]);
 
 handle_unary_op(Rest, Line, Kind, Op, Scope, Tokens) ->
-  tokenize(Rest, Line, Scope, [{ Kind, Line, Op }|Tokens]).
+  case strip_space(Rest, 0) of
+    { [$/|_], _ } -> tokenize(Rest, Line, Scope, [{ identifier, Line, Op }|Tokens]);
+    _ -> tokenize(Rest, Line, Scope, [{ Kind, Line, Op }|Tokens])
+  end.
 
 handle_op([$:|Rest], Line, _Kind, Op, Scope, Tokens) when ?is_space(hd(Rest)) ->
   tokenize(Rest, Line, Scope, [{ kw_identifier, Line, Op }|Tokens]);
 
 handle_op(Rest, Line, Kind, Op, Scope, Tokens) ->
-  tokenize(Rest, Line, Scope, add_token_with_nl({ Kind, Line, Op }, Tokens)).
+  case strip_space(Rest, 0) of
+    { [$/|_], _ } -> tokenize(Rest, Line, Scope, [{ identifier, Line, Op }|Tokens]);
+    _ -> tokenize(Rest, Line, Scope, add_token_with_nl({ Kind, Line, Op }, Tokens))
+  end.
 
 % ## Three Token Operators
 handle_dot([$.,T1,T2,T3|Rest], Line, Scope, Tokens) when

lib/elixir/test/elixir/kernel/fn_test.exs

@@ -52,6 +52,11 @@ defmodule Kernel.FnTest do
     assert (&Kernel.to_string(&1)).(:a) == "a"
   end
 
+  test "capture operator" do
+    assert is_function &+/2
+    assert is_function &(&&/2)
+  end
+
   test "local partial application" do
     assert (&atb(&1, :utf8)).(:a) == "a"
     assert (&atb(list_to_atom(&1), :utf8)).('a') == "a"