sbool match4_debug;

static bool match4(S pat, S s) {
  L<S> tokpat = javaTok(pat);
  jfind_preprocess(tokpat);
  dropPunctuation(tokpat);
  L<S> tok = dropPunctuation(javaTok(s));
  if (match4_debug)
    print("match4: " + tokpat + " / " + tok);
  ret l(tok) == l(tokpat) && jfind(tokpat, tok) == 1;
}