Method parse

src/Common/IntegerMaskParser.cpp:14–46

namespace seissol {
auto IntegerMaskParser::parse(const std::string& maskInput)
    -> std::optional<IntegerMaskParser::MaskType> {
  MaskType resultMask{};

  const auto regex = std::regex("^(\\d+|\\d+-\\d+|\\{(\\d+,?)+\\})(,|$)");
  std::smatch match;

  std::string mask = maskInput;

  while (std::regex_search(mask, match, regex)) {
    const std::string subString = match[1].str();
    mask = match.suffix();

    auto intRange = IntegerMaskParser::parseIntRange(subString);
    if (intRange) {
      resultMask.push_back(*intRange);
      continue;
    }

    auto intList = IntegerMaskParser::parseIntList(subString);
    if (intList) {
      resultMask.push_back(*intList);
      continue;
    }

    resultMask.push_back({std::stoi(subString)});
  }

  if (resultMask.empty()) {
    return std::nullopt;
  }
  return resultMask;
}

auto IntegerMaskParser::parseIntRange(const std::string& str)
    -> IntegerMaskParser::OptionalIntVectorType {