anchor.diff:            CLOSE_SQUARE_BRACKET_INFO, OPEN_SQUARE_BRACKET_TOKEN);
       }
   
  +    if (identical(next, $AT)) {
  +      return tokenizeAt(next);
  +    }
  +
  +    if (next >= $1 && next <= $9) {
  +      return tokenizeNumber(next);
  +    }
  +
  +    if (identical(next, $AMPERSAND)) {
  +      return tokenizeAmpersand(next);
  +    }
  +
  +    if (identical(next, $0)) {
  +      return tokenizeHexOrNumber(next);
  +    }
  +
  +    if (identical(next, $QUESTION)) {
  +      return tokenizeQuestion(next);
  +    }
  +
  +    if (identical(next, $BAR)) {
  +      return tokenizeBar(next);
  +    }
  +
  +    if (identical(next, $PLUS)) {
  +      return tokenizePlus(next);
  +    }
  +
  +    if(identical(next, $$)){
  +      return tokenizeKeywordOrIdentifier(next, true);
  +    }
  +
  +    if (identical(next, $MINUS)) {
  +      return tokenizeMinus(next);
  +    }
  +
  +    if (identical(next, $STAR)) {
  +      return tokenizeMultiply(next);
  +    }
  +
  +    if (identical(next, $CARET)) {
  +      return tokenizeCaret(next);
  +    }
  +
  +    if (identical(next, $TILDE)) {
  +      return tokenizeTilde(next);
  +    }
  +
  +    if (identical(next, $PERCENT)) {
  +      return tokenizePercent(next);
  +    }
  +
       if (identical(next, $BACKPING)) {
         appendPrecedenceToken(BACKPING_INFO);
         return advance();
       }
   
  -    if (identical(next, $OPEN_CURLY_BRACKET)) {
  -      appendBeginGroup(OPEN_CURLY_BRACKET_INFO);
  -      return advance();
  -    }
  -
  -    if (identical(next, $CLOSE_CURLY_BRACKET)) {
  -      return appendEndGroup(CLOSE_CURLY_BRACKET_INFO, OPEN_CURLY_BRACKET_TOKEN);
  -    }
  -
  -    if (identical(next, $SLASH)) {
  -      return tokenizeSlashOrComment(next);
  -    }
  -
  -    if (identical(next, $AT)) {
  -      return tokenizeAt(next);
  -    }
  -
  -    if (identical(next, $DQ) || identical(next, $SQ)) {
  -      return tokenizeString(next, scanOffset, false);
  -    }
  -
  -    if (identical(next, $PERIOD)) {
  -      return tokenizeDotsOrNumber(next);
  -    }
  -
  -    if (identical(next, $0)) {
  -      return tokenizeHexOrNumber(next);
  -    }
  -
  -    // TODO(ahe): Would a range check be faster?
  -    if (identical(next, $1) ||
  -        identical(next, $2) ||
  -        identical(next, $3) ||
  -        identical(next, $4) ||
  -        identical(next, $5) ||
  -        identical(next, $6) ||
  -        identical(next, $7) ||
  -        identical(next, $8) ||
  -        identical(next, $9)) {
  -      return tokenizeNumber(next);
  -    }
  -
  -    if (identical(next, $EOF)) {
  -      return $EOF;
  -    }
  +    if (identical(next, $BACKSLASH)) {
  +      appendPrecedenceToken(BACKSLASH_INFO);
  +      return advance();
  +    }
  +
  +    if (identical(next, $HASH)) {
  +      return tokenizeTag(next);
  +    }
  +
       if (next < 0x1f) {
         return unexpected(next);
       }
  
positive.code:       return advance();
      }
  
      if (identical(next, $QUESTION)) {
        return tokenizeQuestion(next);
      }
  
      if (identical(next, $CLOSE_SQUARE_BRACKET)) {
  
negative.code:       return next;
      }
  
      int nextLower = next | 0x20;
  
      if ($a <= nextLower && nextLower <= $z) {
        if (identical($r, next)) {
          return tokenizeRawStringKeywordOrIdentifier(next);
        }
        return tokenizeKeywordOrIdentifier(next, true);
      }
  
      if (identical(next, $CLOSE_PAREN)) {
        return appendEndGroup(CLOSE_PAREN_INFO, OPEN_PAREN_TOKEN);
      }
  
      if (identical(next, $OPEN_PAREN)) {
        appendBeginGroup(OPEN_PAREN_INFO);
        return advance();
      }
  
  