[es7] Implement async functions parsing

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 907 matching lines @@
   FAIL_ON_MINUS_ZERO
 };
 
 
 enum Signedness { kSigned, kUnsigned };
 
 
 enum FunctionKind {
   kNormalFunction = 0,
   kArrowFunction = 1 << 0,
-  kGeneratorFunction = 1 << 1,
-  kConciseMethod = 1 << 2,
+  kAsyncFunction = 1 << 1,
+  kGeneratorFunction = 1 << 2,
+  kConciseMethod = 1 << 3,
   kConciseGeneratorMethod = kGeneratorFunction | kConciseMethod,
-  kAccessorFunction = 1 << 3,
-  kDefaultConstructor = 1 << 4,
-  kSubclassConstructor = 1 << 5,
-  kBaseConstructor = 1 << 6,
-  kInObjectLiteral = 1 << 7,
+  kAccessorFunction = 1 << 4,
+  kDefaultConstructor = 1 << 5,
+  kSubclassConstructor = 1 << 6,
+  kBaseConstructor = 1 << 7,
+  kInObjectLiteral = 1 << 8,
   kDefaultBaseConstructor = kDefaultConstructor | kBaseConstructor,
   kDefaultSubclassConstructor = kDefaultConstructor | kSubclassConstructor,
   kConciseMethodInObjectLiteral = kConciseMethod | kInObjectLiteral,
   kConciseGeneratorMethodInObjectLiteral =
       kConciseGeneratorMethod | kInObjectLiteral,
   kAccessorFunctionInObjectLiteral = kAccessorFunction | kInObjectLiteral,
 };
 
 
 inline bool IsValidFunctionKind(FunctionKind kind) {
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
+         kind == FunctionKind::kAsyncFunction ||
          kind == FunctionKind::kGeneratorFunction ||
          kind == FunctionKind::kConciseMethod ||
          kind == FunctionKind::kConciseGeneratorMethod ||
          kind == FunctionKind::kAccessorFunction ||
          kind == FunctionKind::kDefaultBaseConstructor ||
          kind == FunctionKind::kDefaultSubclassConstructor ||
          kind == FunctionKind::kBaseConstructor ||
          kind == FunctionKind::kSubclassConstructor ||
          kind == FunctionKind::kConciseMethodInObjectLiteral ||
          kind == FunctionKind::kConciseGeneratorMethodInObjectLiteral ||
          kind == FunctionKind::kAccessorFunctionInObjectLiteral;
 }
 
 
 inline bool IsArrowFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kArrowFunction;
 }
 
 
+inline bool IsAsyncFunction(FunctionKind kind) {
+  DCHECK(IsValidFunctionKind(kind));
+  return kind & FunctionKind::kAsyncFunction;
+}
+
+
 inline bool IsGeneratorFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kGeneratorFunction;
 }
 
 
 inline bool IsConciseMethod(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kConciseMethod;
 }
@@ skipping 41 matching lines @@
   kind = static_cast<FunctionKind>(kind | FunctionKind::kInObjectLiteral);
   DCHECK(IsValidFunctionKind(kind));
   return kind;
 }
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_