Generator objects can suspend

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 1530 matching lines @@
 }
 
 
 void FullCodeGenerator::VisitSharedFunctionInfoLiteral(
     SharedFunctionInfoLiteral* expr) {
   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) {
-    current = current->Exit(&stack_depth, &context_length);
-  }
-  __ Drop(stack_depth);
-  EmitReturnSequence();
-}
-
-
 void FullCodeGenerator::VisitThrow(Throw* expr) {
   Comment cmnt(masm_, "[ Throw");
   VisitForStackValue(expr->exception());
   __ CallRuntime(Runtime::kThrow, 1);
   // Never returns here.
 }
 
 
 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryCatch::Exit(
     int* stack_depth,
@@ skipping 25 matching lines @@
   }
 
   return false;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal