parse method

Implementation

@override
Result<List<({int start, int end, String value})>>? parse(
    State<StringReader> state) {
  final input = state.input;
  final length = input.length;
  if (state.pos >= length) {
    return Result([]);
  }

  final list = <({int start, int end, String value})>[];
  while (state.pos < length) {
    final start = state.pos;
    final r = p.parse(state);
    if (r == null) {
      input.readChar(state.pos);
      state.pos += input.count;
    } else {
      final v = input.substring(start, state.pos);
      list.add((start: start, end: state.pos, value: v));
    }
  }

  return Result(list);
}