Method writeToStream

Bcore/src/main/cpp/Dobby/tests/catch.hpp:6115–6153

  }

  void writeToStream(std::ostream &os) const {
    if (!m_exeName.name().empty()) {
      os << "usage:\n"
         << "  " << m_exeName.name() << " ";
      bool required = true, first = true;
      for (auto const &arg : m_args) {
        if (first)
          first = false;
        else
          os << " ";
        if (arg.isOptional() && required) {
          os << "[";
          required = false;
        }
        os << "<" << arg.hint() << ">";
        if (arg.cardinality() == 0)
          os << " ... ";
      }
      if (!required)
        os << "]";
      if (!m_options.empty())
        os << " options";
      os << "\n\nwhere options are:" << std::endl;
    }

    auto rows           = getHelpColumns();
    size_t consoleWidth = CATCH_CLARA_CONFIG_CONSOLE_WIDTH;
    size_t optWidth     = 0;
    for (auto const &cols : rows)
      optWidth = (std::max)(optWidth, cols.left.size() + 2);

    optWidth = (std::min)(optWidth, consoleWidth / 2);

    for (auto const &cols : rows) {
      auto row = TextFlow::Column(cols.left).width(optWidth).indent(2) + TextFlow::Spacer(4) +
                 TextFlow::Column(cols.right).width(consoleWidth - 7 - optWidth);
      os << row << std::endl;
    }
  }

  friend auto operator<<(std::ostream &os, Parser const &parser) -> std::ostream & {
    parser.writeToStream(os);