static int matchMeta(L<S> tok, S... tokens) {
  outer: for (int i = 1; i+l(tokens)*2-2 < l(tok); i += 2) {
    for (int j = 0; j < l(tokens); j++) {
      S p = tokens[j];
      S t = tok.get(i+j*2);
      boolean ok;
      if (eq(p, "<number>"))
        ok = isInteger(t);
      else if (eq(p, "*"))
        ok = true;
      else
        ok = eq(p, t);
      if (!ok)
        continue outer;
    }
    return i;
  }
  return -1;
}