Traitify ParserBase and move functions there.

src/parser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 386 matching lines @@
   bool multiline_;
   bool simple_;
   bool contains_anchor_;
   bool is_scanned_for_captures_;
   bool failed_;
 };
 
 // ----------------------------------------------------------------------------
 // JAVASCRIPT PARSING
 
-// Forward declaration.
+class Parser;
 class SingletonLogger;
 
-class Parser : public ParserBase {
+class ParserTraits {
+ public:
+  typedef Parser* ParserType;
+  // Return types for traversing functions.
+  typedef Handle<String> IdentifierType;
+
+  explicit ParserTraits(Parser* parser) : parser_(parser) {}
+
+  // Helper functions for recursive descent.
+  bool is_classic_mode() const;
+  bool is_generator() const;
+  bool IsEvalOrArguments(Handle<String> identifier) const;
+
+  // Reporting errors.
+  void ReportMessageAt(Scanner::Location source_location,
+                       const char* message,
+                       Vector<const char*> args);
+  void ReportMessage(const char* message, Vector<Handle<String> > args);
+  void ReportMessageAt(Scanner::Location source_location,
+                       const char* message,
+                       Vector<Handle<String> > args);
+
+  // Identifiers:
+  static IdentifierType EmptyIdentifier() {
+    return Handle<String>();
+  }
+
+  IdentifierType GetSymbol();
+
+ private:
+  Parser* parser_;
+};
+
+
+class Parser : public ParserBase<ParserTraits> {
  public:
   explicit Parser(CompilationInfo* info);
   ~Parser() {
     delete reusable_preparser_;
     reusable_preparser_ = NULL;
   }
 
   // Parses the source code represented by the compilation info and sets its
   // function literal.  Returns false (and deallocates any allocated AST
   // nodes) if parsing failed.
   static bool Parse(CompilationInfo* info,
                     bool allow_lazy = false) {
     Parser parser(info);
     parser.set_allow_lazy(allow_lazy);
     return parser.Parse();
   }
   bool Parse();
 
  private:
+  friend class ParserTraits;
+
   static const int kMaxNumFunctionLocals = 131071;  // 2^17-1
 
   enum Mode {
     PARSE_LAZILY,
     PARSE_EAGERLY
   };
 
   enum VariableDeclarationContext {
     kModuleElement,
     kBlockElement,
@@ skipping 74 matching lines @@
     }
     ~ParsingModeScope() {
       parser_->mode_ = old_mode_;
     }
 
    private:
     Parser* parser_;
     Mode old_mode_;
   };
 
-  virtual bool is_classic_mode() {
-    return top_scope_->is_classic_mode();
-  }
-
   // Returns NULL if parsing failed.
   FunctionLiteral* ParseProgram();
 
   FunctionLiteral* ParseLazy();
   FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
 
   Isolate* isolate() { return isolate_; }
   Zone* zone() const { return zone_; }
   CompilationInfo* info() const { return info_; }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info,
                                   Handle<String> source);
 
   // Report syntax error
   void ReportInvalidPreparseData(Handle<String> name, bool* ok);
-  void ReportMessage(const char* message, Vector<const char*> args);
-  void ReportMessage(const char* message, Vector<Handle<String> > args);
-  void ReportMessageAt(Scanner::Location location, const char* type) {
-    ReportMessageAt(location, type, Vector<const char*>::empty());
-  }
-  void ReportMessageAt(Scanner::Location loc,
-                       const char* message,
-                       Vector<const char*> args);
-  void ReportMessageAt(Scanner::Location loc,
-                       const char* message,
-                       Vector<Handle<String> > args);
 
   void set_pre_parse_data(ScriptDataImpl *data) {
     pre_parse_data_ = data;
     symbol_cache_.Initialize(data ? data->symbol_count() : 0, zone());
   }
 
   bool inside_with() const { return top_scope_->inside_with(); }
   Scanner& scanner()  { return scanner_; }
   Mode mode() const { return mode_; }
   ScriptDataImpl* pre_parse_data() const { return pre_parse_data_; }
   bool is_extended_mode() {
     ASSERT(top_scope_ != NULL);
     return top_scope_->is_extended_mode();
   }
   Scope* DeclarationScope(VariableMode mode) {
     return IsLexicalVariableMode(mode)
         ? top_scope_ : top_scope_->DeclarationScope();
   }
 
-  // Check if the given string is 'eval' or 'arguments'.
-  bool IsEvalOrArguments(Handle<String> string);
-
   // All ParseXXX functions take as the last argument an *ok parameter
   // which is set to false if parsing failed; it is unchanged otherwise.
   // By making the 'exception handling' explicit, we are forced to check
   // for failure at the call sites.
   void* ParseSourceElements(ZoneList<Statement*>* processor, int end_token,
                             bool is_eval, bool is_global, bool* ok);
   Statement* ParseModuleElement(ZoneStringList* labels, bool* ok);
   Statement* ParseModuleDeclaration(ZoneStringList* names, bool* ok);
   Module* ParseModule(bool* ok);
   Module* ParseModuleLiteral(bool* ok);
@@ skipping 66 matching lines @@
       Scanner::Location function_name_location,
       bool name_is_strict_reserved,
       bool is_generator,
       int function_token_position,
       FunctionLiteral::FunctionType type,
       bool* ok);
 
   // Magical syntax support.
   Expression* ParseV8Intrinsic(bool* ok);
 
-  bool is_generator() const { return current_function_state_->is_generator(); }
-
   bool CheckInOrOf(bool accept_OF, ForEachStatement::VisitMode* visit_mode);
 
   Handle<String> LiteralString(PretenureFlag tenured) {
     if (scanner().is_literal_ascii()) {
       return isolate_->factory()->NewStringFromAscii(
           scanner().literal_ascii_string(), tenured);
     } else {
       return isolate_->factory()->NewStringFromTwoByte(
             scanner().literal_utf16_string(), tenured);
     }
   }
 
   Handle<String> NextLiteralString(PretenureFlag tenured) {
     if (scanner().is_next_literal_ascii()) {
       return isolate_->factory()->NewStringFromAscii(
           scanner().next_literal_ascii_string(), tenured);
     } else {
       return isolate_->factory()->NewStringFromTwoByte(
           scanner().next_literal_utf16_string(), tenured);
     }
   }
 
-  Handle<String> GetSymbol();
-
   // Get odd-ball literals.
   Literal* GetLiteralUndefined(int position);
   Literal* GetLiteralTheHole(int position);
 
-  Handle<String> ParseIdentifier(AllowEvalOrArgumentsAsIdentifier, bool* ok);
-  Handle<String> ParseIdentifierOrStrictReservedWord(
-      bool* is_strict_reserved, bool* ok);
-  Handle<String> ParseIdentifierName(bool* ok);
-  Handle<String> ParseIdentifierNameOrGetOrSet(bool* is_get,
-                                               bool* is_set,
-                                               bool* ok);
-
   // Determine if the expression is a variable proxy and mark it as being used
   // in an assignment or with a increment/decrement operator. This is currently
   // used on for the statically checking assignments to harmony const bindings.
   void MarkAsLValue(Expression* expression);
 
   // Strict mode validation of LValue expressions
   void CheckStrictModeLValue(Expression* expression,
                              bool* ok);
 
   // For harmony block scoping mode: Check if the scope has conflicting var/let
@@ skipping 105 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_