sbool jreplace_any_dyn(LS tok, Cl<S> ins, IF0<S> out) {
  ret jreplace_any_dyn(tok, ins, if0ToIF2(out));
}

sbool jreplace_any_dyn(LS tok, Cl<S> ins, IF2<LS, Int, S> out) {
  bool change;
  for (S in : ins)
    change |= jreplace_dyn(tok, in, out);
  ret change;
}