First version of the new generators implementation.

src/objects.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 7338 matching lines @@
   // [operand_stack]: Saved operand stack.
   DECL_ACCESSORS(operand_stack, FixedArray)
 
   DECLARE_CAST(JSGeneratorObject)
 
   // Dispatched behavior.
   DECLARE_PRINTER(JSGeneratorObject)
   DECLARE_VERIFIER(JSGeneratorObject)
 
   // Magic sentinel values for the continuation.
-  static const int kGeneratorExecuting = -1;
-  static const int kGeneratorClosed = 0;
+  static const int kGeneratorExecuting = -2;
+  static const int kGeneratorClosed = -1;
 
   // Layout description.
   static const int kFunctionOffset = JSObject::kHeaderSize;
   static const int kContextOffset = kFunctionOffset + kPointerSize;
   static const int kReceiverOffset = kContextOffset + kPointerSize;
   static const int kInputOffset = kReceiverOffset + kPointerSize;
   static const int kResumeModeOffset = kInputOffset + kPointerSize;
   static const int kContinuationOffset = kResumeModeOffset + kPointerSize;
   static const int kOperandStackOffset = kContinuationOffset + kPointerSize;
   static const int kSize = kOperandStackOffset + kPointerSize;
@@ skipping 3409 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_