Simplify PreParser::ParsePrimaryExpression

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 1092 matching lines @@
   //   '(' Expression ')'
 
   Expression result = Expression::Default();
   switch (peek()) {
     case i::Token::THIS: {
       Next();
       result = Expression::This();
       break;
     }
 
-    case i::Token::FUTURE_RESERVED_WORD: {
-      Next();
-      i::Scanner::Location location = scanner_->location();
-      ReportMessageAt(location.beg_pos, location.end_pos,
-                      "reserved_word", NULL);
-      *ok = false;
-      return Expression::Default();
-    }
-
+    case i::Token::FUTURE_RESERVED_WORD:
     case i::Token::FUTURE_STRICT_RESERVED_WORD:
-      if (!is_classic_mode()) {
-        Next();
-        i::Scanner::Location location = scanner_->location();
-        ReportMessageAt(location, "strict_reserved_word", NULL);
-        *ok = false;
-        return Expression::Default();
-      }
-      // FALLTHROUGH
     case i::Token::IDENTIFIER: {
       Identifier id = ParseIdentifier(CHECK_OK);
       result = Expression::FromIdentifier(id);
       break;
     }
 
     case i::Token::NULL_LITERAL:
     case i::Token::TRUE_LITERAL:
     case i::Token::FALSE_LITERAL:
     case i::Token::NUMBER: {
@@ skipping 639 matching lines @@
       backing_store_.Add(static_cast<byte>((ascii_length >> 14) | 0x80u));
     }
     backing_store_.Add(static_cast<byte>((ascii_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<byte>(ascii_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 } }  // v8::preparser