nobu	2016-08-19 11:39:09 +0900 (Fri, 19 Aug 2016)

  New Revision: 55965

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=55965

  Log:
    parse.y: lparen_arg statement
    
    * parse.y (primary): allow parenthesised statement as a method
      argument.  [Feature #12686]

  Modified files:
    trunk/ChangeLog
    trunk/parse.y
    trunk/test/ruby/test_syntax.rb
Index: parse.y
===================================================================
--- parse.y	(revision 55964)
+++ parse.y	(revision 55965)
@@ -2659,7 +2659,7 @@ primary		: literal https://github.com/ruby/ruby/blob/trunk/parse.y#L2659
 			$<val>1 = cmdarg_stack;
 			CMDARG_SET(0);
 		    }
-		  expr {SET_LEX_STATE(EXPR_ENDARG);} rparen
+		  stmt {SET_LEX_STATE(EXPR_ENDARG);} rparen
 		    {
 			CMDARG_SET($<val>1);
 		    /*%%%*/
Index: test/ruby/test_syntax.rb
===================================================================
--- test/ruby/test_syntax.rb	(revision 55964)
+++ test/ruby/test_syntax.rb	(revision 55965)
@@ -827,6 +827,11 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/test_syntax.rb#L827
     end
   end
 
+  def test_parenthesised_statement_argument
+    assert_syntax_error("foo(bar rescue nil)", /unexpected modifier_rescue/)
+    assert_valid_syntax("foo (bar rescue nil)")
+  end
+
   private
 
   def not_label(x) @result = x; @not_label ||= nil end
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 55964)
+++ ChangeLog	(revision 55965)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Fri Aug 19 11:39:06 2016  Nobuyoshi Nakada  <nobu@r...>
+
+	* parse.y (primary): allow parenthesised statement as a method
+	  argument.  [Feature #12686]
+
 Fri Aug 19 09:12:45 2016  Nobuyoshi Nakada  <nobu@r...>
 
 	* vm.c (vm_set_main_stack): TOPLEVEL_BINDING must be built.

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