protected static boolean id_start_char(int ch){
  return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch == '_');
}

protected static boolean id_start_char ( int ch ) { return ( ch >= 'a' && ch <= 'z' ) || ( ch >= 'A' && ch <= 'Z' ) || ( ch == '_' ) ; }
determine if a character is ok to start an id .
