scope gazelle_addVarSplittersToRules.

sclass #VarSplitter {
  S var;
  bool debug;
 
  *() {}
  *(S *var, bool *debug) {}
  
  SS get(SS map, LS tokC, LS tokI, RuleEngine2_MatchedRule matched) {
    if (map == null) null;
    S value = getOrKeep(map, curly(var));
    LS tok1 = matched.tokenize(var);
    LS tok2 = matched.tokenize(uncurly(value));
    if (debug) print("VarSplitter: " + tok1 + " / " + tok2);
    if (l(tok1) != l(tok2)) null;
    int oldSize = l(map);
    for (int i = 1; i < l(tok1); i += 2)
      if (!strictPutIC(map, tok1.get(i), tok2.get(i))) null;
    if (debug) print("VarSplitter done => " + map);
    matched.nPossibleVars = matched.nPossibleVars() + l(map)-oldSize;
    ret map;
  }
}

svoid gazelle_addVarSplittersToRules(RuleEngine2 engine, O... _) {
  new Matches m;
  bool debug = boolPar debug(_);
  for (final RuleEngine2.Rule r : engine.rules) {
    continue unless jmatchAny("split *", r.comments, m) && isQuoted(m.get(0));
    S var = $1;
    if (debug) print("Made splitter for: " + var);
    r.addMapMassager(new VarSplitter(var, debug));
  }
}

end scope

Began life as a copy of #1021688