case DEFAULT: case CLASS: case PROTECTED: case PUBLIC: case FUNCTION: case LIST: case CASE: case TRUE: case FALSE: case RETURN: case ECHO: case AND_RES: case OR_RES: case XOR_RES: case REQUIRE:
else if (FIRST_IDENTIFIER_LEXEME <= token)
  private String parseIdentifier()    throws IOException  {    int token = parseToken();    switch (token) {    case IDENTIFIER:      return _lexeme;    case DEFAULT:    case CLASS:    case PROTECTED:    case PUBLIC:    case FUNCTION:    case LIST:    case CASE:    case TRUE:    case FALSE:    case RETURN:    case ECHO:    case AND_RES:    case OR_RES:    case XOR_RES:    case REQUIRE:      return _lexeme;          default:      throw error(L.l("expected identifier at {0}.", tokenName(token)));    }  }