module regex import strings // compile_opt compile RE pattern string pub fn (mut re RE) compile_opt(pattern string) ? { re_err, err_pos := re.impl_compile(pattern) if re_err != compile_ok { mut err_msg := strings.new_builder(300) err_msg.write_string('\nquery: $pattern\n') line := '-'.repeat(err_pos) err_msg.write_string('err : $line^\n') err_str := re.get_parse_error_string(re_err) err_msg.write_string('ERROR: $err_str\n') return error_with_code(err_msg.str(), re_err) } } // new_regex create a RE of small size, usually sufficient for ordinary use pub fn new() RE { // init regex mut re := RE{} re.prog = []Token{len: max_code_len + 1} // max program length, can not be longer then the pattern re.cc = []CharClass{len: max_code_len} // can not be more char class the the length of the pattern re.group_csave_flag = false // enable continuos group saving re.group_max_nested = 128 // set max 128 group nested re.group_max = max_code_len >> 1 // we can't have more groups than the half of the pattern legth re.group_stack = []int{len: re.group_max, init: -1} re.group_data = []int{len: re.group_max, init: -1} return re } // regex_opt create new RE object from RE pattern string pub fn regex_opt(pattern string) ?RE { // init regex mut re := RE{} re.prog = []Token{len: pattern.len + 1} // max program length, can not be longer then the pattern re.cc = []CharClass{len: pattern.len} // can not be more char class the the length of the pattern re.group_csave_flag = false // enable continuos group saving re.group_max_nested = 128 // set max 128 group nested re.group_max = pattern.len >> 1 // we can't have more groups than the half of the pattern legth re.group_stack = []int{len: re.group_max, init: -1} re.group_data = []int{len: re.group_max, init: -1} // compile the pattern re.compile_opt(pattern) ? return re }