Calling a generator function returns a generator object

src/full-codegen.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 1535 matching lines @@
   Comment cmnt(masm_, "[ SharedFunctionInfoLiteral");
   EmitNewClosure(expr->shared_function_info(), false);
 }
 
 
 void FullCodeGenerator::VisitYield(Yield* expr) {
   if (expr->is_delegating_yield())
     UNIMPLEMENTED();
 
   Comment cmnt(masm_, "[ Yield");
+  // TODO(wingo): Actually update the iterator state.
+  VisitForEffect(expr->generator_object());
   VisitForAccumulatorValue(expr->expression());
   // TODO(wingo): Assert that the operand stack depth is 0, at least while
   // general yield expressions are unimplemented.
 
   // TODO(wingo): What follows is as in VisitReturnStatement.  Replace it with a
   // call to a builtin that will resume the generator.
   NestedStatement* current = nesting_stack_;
   int stack_depth = 0;
   int context_length = 0;
   while (current != NULL) {
@@ skipping 42 matching lines @@
   }
 
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal