Function sum_flag_vector

simcore/framework/src/cli/cli.hpp:1812–1818

template <typename T,
          enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value, detail::enabler> = detail::dummy>
void sum_flag_vector(const std::vector<std::string> &flags, T &output) {
  std::int64_t count{0};
  for (auto &flag : flags) {
    count += detail::to_flag_value(flag);
  }
  output = (count > 0) ? static_cast<T>(count) : T{0};
}

/// Sum a vector of flag representations
/// The flag vector produces a series of strings in a vector,  simple true is represented by a "1",  simple false is