(kill (all), 0);
0;

( regex : regex_compile("ne{2}dle"),
  str : "his hay needle stack -- my hay needle stack -- her hay needle stack",
  0);
0;

regex_match_pos(regex, str);
[[9, 15]];

regex_match_pos("ne{2}dle", str); 
[[9, 15]];

regex_match_pos("ne{2}dle", str, 25, 44);
[[32, 38]];

regex_match_pos("ne{2}dle", str, 32, 38);
[[32, 38]];

regex_match_pos("ne{2}dle", str, 25, 37);
false;

regex_match_pos("ne{2}dle", str, 25);
[[32, 38]];

regex_match("ne{2}dle", "hay needle stack");
["needle"];

regex_split("[,;]+", "split,pea;;;soup");
["split", "pea", "soup"];

regex_subst_first("ty", "t.", "liberte egalite fraternite");
"liberty egalite fraternite";

regex_subst("ty", "t.", "liberte egalite fraternite");
"liberty egality fratyrnity";

regex_split("\\D+", "13. 3. 2009  13:03 Uhr");
["13", "3", "2009", "13", "03"];

string_to_regex(". :");
"\\. :";

(remvalue(regex, str), 0); 
0;