Method ParseSingleValue

src/settings.cpp:188–198

* Find the index value of a ONEofMANY type in a string * @param str the current value of the setting for which a value needs found * @param many full domain of values the ONEofMANY setting can have * @return the integer index of the full-list, or std::nullopt if not found */

 * @return the integer index of the full-list, or std::nullopt if not found
 */
std::optional<uint32_t> OneOfManySettingDesc::ParseSingleValue(std::string_view str, std::span<const std::string_view> many)
{
	StringConsumer consumer{str};
	auto digit = consumer.TryReadIntegerBase<uint32_t>(10);
	/* check if it's an integer */
	if (digit.has_value()) return digit;

	auto it = std::ranges::find(many, str);
	if (it == many.end()) return std::nullopt;
	return static_cast<uint32_t>(it - many.begin());
}

/**
 * Find whether a string was a boolean true or a boolean false.