ES6: Implement generator method shorthand

src/globals.h

 // Copyright 2012 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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include "include/v8stdint.h"
 
 #include "src/base/build_config.h"
@@ skipping 743 matching lines @@
 enum MinusZeroMode {
   TREAT_MINUS_ZERO_AS_ZERO,
   FAIL_ON_MINUS_ZERO
 };
 
 
 enum FunctionKind {
   kNormalFunction = 0,
   kArrowFunction = 1,
   kGeneratorFunction = 2,
-  kConciseMethod = 4
+  kConciseMethod = 4,
+  kConciseGeneratorMethod = kGeneratorFunction | kConciseMethod
 };
 
 
 inline bool IsValidFunctionKind(FunctionKind kind) {
-  // At the moment these are mutually exclusive but in the future that wont be
-  // the case since ES6 allows concise generator methods.
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
          kind == FunctionKind::kGeneratorFunction ||
-         kind == FunctionKind::kConciseMethod;
+         kind == FunctionKind::kConciseMethod ||
+         kind == FunctionKind::kConciseGeneratorMethod;
 }
 
 
 inline bool IsArrowFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kArrowFunction;
 }
 
 
 inline bool IsGeneratorFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kGeneratorFunction;
 }
 
 
 inline bool IsConciseMethod(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kConciseMethod;
 }
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_