Implement handling of arrow functions in the parser

src/preparser.cc

 // Copyright 2011 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 71 matching lines @@
                                       const char* type,
                                       const char* name_opt,
                                       bool is_reference_error) {
   pre_parser_->log_->LogMessage(start_pos, end_pos, type, name_opt,
                                 is_reference_error);
 }
 
 
 PreParserIdentifier PreParserTraits::GetSymbol(Scanner* scanner) {
   if (scanner->current_token() == Token::FUTURE_RESERVED_WORD) {
-    return PreParserIdentifier::FutureReserved();
+    return PreParserIdentifier::FutureReserved(scanner->location().beg_pos);
   } else if (scanner->current_token() ==
              Token::FUTURE_STRICT_RESERVED_WORD) {
-    return PreParserIdentifier::FutureStrictReserved();
+    return PreParserIdentifier::FutureStrictReserved(
+        scanner->location().beg_pos);
   } else if (scanner->current_token() == Token::YIELD) {
-    return PreParserIdentifier::Yield();
+    return PreParserIdentifier::Yield(scanner->location().beg_pos);
   }
   if (scanner->UnescapedLiteralMatches("eval", 4)) {
-    return PreParserIdentifier::Eval();
+    return PreParserIdentifier::Eval(scanner->location().beg_pos);
   }
   if (scanner->UnescapedLiteralMatches("arguments", 9)) {
-    return PreParserIdentifier::Arguments();
+    return PreParserIdentifier::Arguments(scanner->location().beg_pos);
   }
-  return PreParserIdentifier::Default();
+  return PreParserIdentifier::Default(scanner->location().beg_pos);
 }
 
 
 PreParserExpression PreParserTraits::ExpressionFromString(
     int pos, Scanner* scanner, PreParserFactory* factory) {
   if (scanner->UnescapedLiteralMatches("use strict", 10)) {
     return PreParserExpression::UseStrictStringLiteral();
   }
   return PreParserExpression::StringLiteral();
 }
@@ skipping 839 matching lines @@
   ParseIdentifier(kAllowEvalOrArguments, CHECK_OK);
   ParseArguments(ok);
 
   return Expression::Default();
 }
 
 #undef CHECK_OK
 
 
 } }  // v8::internal