| mat!(match_flag_case, "(?-u)(?i)abc", "ABC", Some((0, 3))); | 
 | mat!(match_flag_weird_case, "(?-u)(?i)a(?-i)bc", "Abc", Some((0, 3))); | 
 | mat!(match_flag_weird_case_not, "(?-u)(?i)a(?-i)bc", "ABC", None); | 
 | mat!(match_flag_case_dotnl, "(?-u)(?is)a(?u:.)", "A\n", Some((0, 2))); | 
 | mat!( | 
 |     match_flag_case_dotnl_toggle, | 
 |     "(?-u)(?is)a(?u:.)(?-is)a(?u:.)", | 
 |     "A\nab", | 
 |     Some((0, 4)) | 
 | ); | 
 | mat!( | 
 |     match_flag_case_dotnl_toggle_not, | 
 |     "(?-u)(?is)a(?u:.)(?-is)a(?u:.)", | 
 |     "A\na\n", | 
 |     None | 
 | ); | 
 | mat!( | 
 |     match_flag_case_dotnl_toggle_ok, | 
 |     "(?-u)(?is)a(?u:.)(?-is:a(?u:.))?", | 
 |     "A\na\n", | 
 |     Some((0, 2)) | 
 | ); | 
 | mat!( | 
 |     match_flag_multi, | 
 |     r"(?-u)(?m)(?:^\d+$\n?)+", | 
 |     "123\n456\n789", | 
 |     Some((0, 11)) | 
 | ); | 
 | mat!(match_flag_ungreedy, "(?U)a+", "aa", Some((0, 1))); | 
 | mat!(match_flag_ungreedy_greedy, "(?U)a+?", "aa", Some((0, 2))); | 
 | mat!(match_flag_ungreedy_noop, "(?U)(?-U)a+", "aa", Some((0, 2))); |