Allow constructor and method signatures in classes

src/parsing/parser.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_PARSING_PARSER_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 482 matching lines @@
                        const AstRawString* arg,
                        ParseErrorType error_type = kSyntaxError);
 
   // "null" return type creators.
   static const AstRawString* EmptyIdentifier() {
     return NULL;
   }
   static Expression* EmptyExpression() {
     return NULL;
   }
+  static bool IsEmptyExpression(Expression* e) { return e == nullptr; }
   static Literal* EmptyLiteral() {
     return NULL;
   }
   static ObjectLiteralProperty* EmptyObjectLiteralProperty() { return NULL; }
   static FunctionLiteral* EmptyFunctionLiteral() { return NULL; }
 
   static typesystem::Type* EmptyType() { return nullptr; }
   static ZoneList<typesystem::Type*>* NullTypeList() { return nullptr; }
   V8_INLINE ZoneList<typesystem::Type*>* EmptyTypeList() const;
   static ZoneList<typesystem::TypeParameter*>* NullTypeParameters() {
@@ skipping 808 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_