static S ai_tripleAnswer_regexpMatches(T3<S> t) {
  new Matches m1;
  new Matches m2;
  if (eqic(t.b, "matches?") && match("the regexp *", t.a, m1) && match("the string *", t.c, m2) && isQuoted(m1.get(0)) && isQuoted(m2.get(0)))
    ret yn(safeRegexp(m1.unq(0), m2.unq(0)).matches());
  null;
}