Function parse_resolution_string

src/display_device.cpp:150–177

* @brief Parse resolution value from the string. * @param input String to be parsed. * @param output Reference to output variable to fill in. * @returns True on successful parsing (empty string allowed), false otherwise. * * @examples * std::optional resolution; * if (parse_resolution_string("1920x1080", resolution)) { * if (resolution) {

     * @examples_end
     */
    bool parse_resolution_string(const std::string &input, std::optional<Resolution> &output) {
      const std::string trimmed_input {boost::algorithm::trim_copy(input)};
      const std::regex resolution_regex {R"(^(\d+)x(\d+)$)"};

      if (std::smatch match; std::regex_match(trimmed_input, match, resolution_regex)) {
        try {
          output = Resolution {
            stou(match[1].str()),
            stou(match[2].str())
          };
          return true;
        } catch (const std::out_of_range &) {
          BOOST_LOG(error) << "Failed to parse resolution string " << trimmed_input << " (number out of range).";
        } catch (const std::exception &err) {
          BOOST_LOG(error) << "Failed to parse resolution string " << trimmed_input << ":\n"
                           << err.what();
        }
      } else {
        if (trimmed_input.empty()) {
          output = std::nullopt;
          return true;
        }

        BOOST_LOG(error) << "Failed to parse resolution string " << trimmed_input << R"(. It must match a "1920x1080" pattern!)";
      }

      return false;
    }

    /**
     * @brief Parse refresh rate value from the string.