Implement yield* (delegating yield)

src/parser.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3095 matching lines @@
 Expression* Parser::ParseYieldExpression(bool* ok) {
   // YieldExpression ::
   //   'yield' '*'? AssignmentExpression
   int position = scanner().peek_location().beg_pos;
   Expect(Token::YIELD, CHECK_OK);
   Yield::Kind kind =
       Check(Token::MUL) ? Yield::DELEGATING : Yield::SUSPEND;
   Expression* generator_object = factory()->NewVariableProxy(
       current_function_state_->generator_object_variable());
   Expression* expression = ParseAssignmentExpression(false, CHECK_OK);
-  return factory()->NewYield(generator_object, expression, kind, position);
+  Yield* yield =
+      factory()->NewYield(generator_object, expression, kind, position);
+  if (kind == Yield::DELEGATING) {
+    yield->set_index(current_function_state_->NextHandlerIndex());
+  }
+  return yield;
 }
 
 
 // Precedence = 3
 Expression* Parser::ParseConditionalExpression(bool accept_IN, bool* ok) {
   // ConditionalExpression ::
   //   LogicalOrExpression
   //   LogicalOrExpression '?' AssignmentExpression ':' AssignmentExpression
 
   // We start using the binary expression parser for prec >= 4 only!
@@ skipping 2909 matching lines @@
       ASSERT(info()->isolate()->has_pending_exception());
     } else {
       result = ParseProgram();
     }
   }
   info()->SetFunction(result);
   return (result != NULL);
 }
 
 } }  // namespace v8::internal