Properly disallow 'yield' in class expressions and arrow parameters

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 873 matching lines @@
 
   // Temporary glue; these functions will move to ParserBase.
   PreParserExpression ParseV8Intrinsic(bool* ok);
   V8_INLINE PreParserExpression ParseDoExpression(bool* ok);
   PreParserExpression ParseFunctionLiteral(
       PreParserIdentifier name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_position, FunctionLiteral::FunctionType type,
       LanguageMode language_mode, bool* ok);
 
-  PreParserExpression ParseClassLiteral(PreParserIdentifier name,
+  PreParserExpression ParseClassLiteral(Type::ExpressionClassifier* classifier,
+                                        PreParserIdentifier name,
                                         Scanner::Location class_name_location,
                                         bool name_is_strict_reserved, int pos,
                                         bool* ok);
 
   V8_INLINE void MarkTailPosition(PreParserExpression) {}
 
   PreParserExpressionList PrepareSpreadArguments(PreParserExpressionList list) {
     return list;
   }
 
@@ skipping 184 matching lines @@
       FunctionLiteral::FunctionType function_type, bool* ok);
 
   Expression ParseFunctionLiteral(
       Identifier name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_pos, FunctionLiteral::FunctionType function_type,
       LanguageMode language_mode, bool* ok);
   void ParseLazyFunctionLiteralBody(bool* ok,
                                     Scanner::BookmarkScope* bookmark = nullptr);
 
-  PreParserExpression ParseClassLiteral(PreParserIdentifier name,
+  PreParserExpression ParseClassLiteral(ExpressionClassifier* classifier,
+                                        PreParserIdentifier name,
                                         Scanner::Location class_name_location,
                                         bool name_is_strict_reserved, int pos,
                                         bool* ok);
 
   int* use_counts_;
 };
 
 
 void PreParserTraits::MaterializeTemplateCallsiteLiterals() {
   pre_parser_->function_state_->NextMaterializedLiteralIndex();
@@ skipping 87 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