How to use

parseToken

method

in

cc.redberry.core.parser.ParserOperator

@Override
public ParseToken parseToken(String expression, Parser parser) {
  ParseToken node = super.parseToken(expression, parser);
  if (node == null || !parser.isAllowSameVariance())
    return node;
  TIntHashSet indices = new TIntHashSet();
  for (ParseToken c : node.content) {
    Indices free = c.getIndices().getFree();
    for (int i = 0; i < free.size(); i++) {
      int ind = free.get(i);
      if (indices.contains(ind))
        revertIndex(c, ind);
      else indices.add(ind);
    }
  }
  return node;
}