Allow constructor and method signatures in classes

src/parsing/preparser.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_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/hashmap.h"
@@ skipping 165 matching lines @@
         TypeField::encode(kExpression) |
         ExpressionTypeField::encode(kSuperCallReference));
   }
 
   static PreParserExpression NoTemplateTag() {
     return PreParserExpression(
         TypeField::encode(kExpression) |
         ExpressionTypeField::encode(kNoTemplateTagExpression));
   }
 
+  static PreParserExpression Empty() {
+    return PreParserExpression(TypeField::encode(kEmptyExpression));
+  }
+
+  bool IsEmpty() const { return TypeField::decode(code_) == kEmptyExpression; }
+
   bool IsIdentifier() const {
     return TypeField::decode(code_) == kIdentifierExpression;
   }
 
   PreParserIdentifier AsIdentifier() const {
     DCHECK(IsIdentifier());
     return PreParserIdentifier(IdentifierTypeField::decode(code_));
   }
 
   bool IsAssignment() const {
@@ skipping 79 matching lines @@
   // More dummy implementations of things PreParser doesn't need to track:
   void set_index(int index) {}  // For YieldExpressions
   void set_should_eager_compile() {}
 
   int position() const { return RelocInfo::kNoPosition; }
   void set_function_token_position(int position) {}
 
  private:
   enum Type {
     kExpression,
+    kEmptyExpression,
     kIdentifierExpression,
     kStringLiteralExpression,
     kBinaryOperationExpression,
     kSpreadExpression,
     kObjectLiteralExpression,
     kArrayLiteralExpression
   };
 
   enum ExpressionType {
     kThisExpression,
@@ skipping 703 matching lines @@
                        ParseErrorType error_type = kSyntaxError);
 
   // "null" return type creators.
   static PreParserIdentifier EmptyIdentifier() {
     return PreParserIdentifier::Default();
   }
   static PreParserIdentifier EmptyIdentifierString() {
     return PreParserIdentifier::Default();
   }
   static PreParserExpression EmptyExpression() {
-    return PreParserExpression::Default();
+    return PreParserExpression::Empty();
   }
   static PreParserExpression EmptyLiteral() {
     return PreParserExpression::Default();
   }
   static PreParserExpression EmptyObjectLiteralProperty() {
     return PreParserExpression::Default();
   }
   static PreParserExpression EmptyFunctionLiteral() {
     return PreParserExpression::Default();
   }
@@ skipping 33 matching lines @@
   }
   static typesystem::PreParserType HoleTypeElement() {
     return typesystem::PreParserType::Default(false);
   }
   static typesystem::PreParserTypeMembers EmptyTypeMembers() {
     return typesystem::PreParserTypeMembers();
   }
   static typesystem::PreParserTypeMember EmptyTypeMember() {
     return typesystem::PreParserTypeMember::Default(false, false);
   }
+  static bool IsEmptyExpression(const PreParserExpression& expression) {
+    return expression.IsEmpty();
+  }
 
   // Odd-ball literal creators.
   static PreParserExpression GetLiteralTheHole(int position,
                                                PreParserFactory* factory) {
     return PreParserExpression::Default();
   }
 
   // Producing data during the recursive descent.
   PreParserIdentifier GetSymbol(Scanner* scanner);
   PreParserIdentifier GetNumberAsSymbol(Scanner* scanner);
@@ skipping 413 matching lines @@
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   return pre_parser_->ParseEagerFunctionBody(function_name, pos, parameters,
                                              kind, function_type, ok);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H