// returns pairs(rule, mapping)
static LPair<S, SS> agiBlue_rules_gazelleZip(S input) {
  new LPair<S, SS> out;
  for (S rule : agiBlue_allRules()) {
    PairS p = splitAtDoubleArrow_pair(rule), continue if null;
    SS map = gazelle_zip(p.a, input), continue if null;
    out.add(pair(rule, mapKeysAndValues tok_deRoundOrCurlyBracket(map)));
  }
  ret out;
}