static L<PartialAttractor> pAttractor_allMatches3(Collection<PartialAttractor> attractors, LS tok) {
  int i = 0;
  new L<PartialAttractor> out;
  while (licensed() && i < l(tok)) {
    new Lowest<PartialAttractor> best;
    for (PartialAttractor a : attractors) {
      a.tok = subList(tok, i);
      if (a.find()) {
        if (a.matchedRange.end < 2)
          continue with print("Bad attractor (empty match): " + a);
        best.put(shallowClone(a), a.matchedRange.start);
      }
    }
    if (!best.has()) break; // no more matches
    out.add(best!);
    i += best->matchedRange.end & ~1; // go to next N token
  }
  ret out;
}

Began life as a copy of #1022875