Function ParseRelNum

src/strgen/strgen_base.cpp:175–186

The plural specifier looks like * {NUM} {PLURAL passenger passengers} then it picks either passenger/passengers depending on the count in NUM */

/* The plural specifier looks like
 * {NUM} {PLURAL <ARG#> passenger passengers} then it picks either passenger/passengers depending on the count in NUM */
static std::pair<std::optional<size_t>, std::optional<size_t>> ParseRelNum(StringConsumer &consumer)
{
	consumer.SkipUntilCharNotIn(StringConsumer::WHITESPACE_NO_NEWLINE);
	std::optional<size_t> v = consumer.TryReadIntegerBase<size_t>(10);
	std::optional<size_t> offset;
	if (v.has_value() && consumer.ReadCharIf(':')) {
		/* Take the Nth within */
		offset = consumer.TryReadIntegerBase<size_t>(10);
		if (!offset.has_value()) StrgenFatal("Expected number for substring parameter");
	}
	return {v, offset};
}

/* Parse out the next word, or nullptr */
std::optional<std::string_view> ParseWord(StringConsumer &consumer)