Set up rewriting triggers

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 920 matching lines @@
                                            PreParserExpressionList args,
                                            int pos);
 
   inline void RewriteDestructuringAssignments() {}
 
   inline void QueueDestructuringAssignmentForRewriting(PreParserExpression) {}
 
   void SetFunctionNameFromPropertyName(PreParserExpression,
                                        PreParserIdentifier) {}
 
-  inline PreParserExpression RewriteExpression(PreParserExpression expr) {
-    return expr;
-  }
+  inline PreParserExpression RewriteExpression(
+      PreParserExpression expr, const ExpressionClassifier* classifier,
+      bool* ok);
   inline PreParserExpression RewriteObjectLiteralProperty(
-      PreParserExpression property) {
-    return property;
-  }
+      PreParserExpression property, const ExpressionClassifier* classifier,
+      bool* ok);
 
  private:
   PreParser* pre_parser_;
 };
 
 
 // Preparsing checks a JavaScript program and emits preparse-data that helps
 // a later parsing to be faster.
 // See preparse-data-format.h for the data format.
 
@@ skipping 162 matching lines @@
   // TODO(wingo): Detect duplicated identifiers in paramlists.  Detect parameter
   // lists that are too long.
 }
 
 
 PreParserExpression PreParserTraits::ParseDoExpression(bool* ok) {
   return pre_parser_->ParseDoExpression(ok);
 }
 
 
+PreParserExpression PreParserTraits::RewriteExpression(
+    PreParserExpression expr, const ExpressionClassifier* classifier,
+    bool* ok) {
+  pre_parser_->ValidateExpression(classifier, ok);
+  return expr;
+}
+
+
+PreParserExpression PreParserTraits::RewriteObjectLiteralProperty(
+    PreParserExpression property, const ExpressionClassifier* classifier,
+    bool* ok) {
+  pre_parser_->ValidateExpression(classifier, ok);
+  return property;
+}
+
+
 PreParserStatementList PreParser::ParseEagerFunctionBody(
     PreParserIdentifier function_name, int pos,
     const PreParserFormalParameters& parameters, FunctionKind kind,
     FunctionLiteral::FunctionType function_type, bool* ok) {
   ParsingModeScope parsing_mode(this, PARSE_EAGERLY);
 
   ParseStatementList(Token::RBRACE, ok);
   if (!*ok) return PreParserStatementList();
 
   Expect(Token::RBRACE, ok);
   return PreParserStatementList();
 }
 
 
 PreParserStatementList PreParserTraits::ParseEagerFunctionBody(
     PreParserIdentifier function_name, int pos,
     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