Unify handling of position info in AST, part 1

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 574 matching lines @@
   void ReportMessage(const char* message, Vector<const char*> args);
   void ReportMessage(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_; }
+  int position() { return scanner_.location().beg_pos; }
+  int peek_position() { return scanner_.peek_location().beg_pos; }
   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();
   }
@@ skipping 156 matching lines @@
           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();
-  Literal* GetLiteralTheHole();
+  Literal* GetLiteralUndefined(int position);
+  Literal* GetLiteralTheHole(int position);
 
   Handle<String> ParseIdentifier(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
@@ skipping 123 matching lines @@
  private:
   static const int kLiteralTypeSlot = 0;
   static const int kElementsSlot = 1;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PARSER_H_