Function GetRailTypeByLabel

src/rail.cpp:195–210

* Get the rail type for a given label. * @param label the railtype label. * @param allow_alternate_labels Search in the alternate label lists as well. * @return the railtype. */

 * @return the railtype.
 */
RailType GetRailTypeByLabel(RailTypeLabel label, bool allow_alternate_labels)
{
	extern RailTypeInfo _railtypes[RAILTYPE_END];
	if (label == 0) return INVALID_RAILTYPE;

	auto it = std::ranges::find(_railtypes, label, &RailTypeInfo::label);
	if (it == std::end(_railtypes) && allow_alternate_labels) {
		/* Test if any rail type defines the label as an alternate. */
		it = std::ranges::find_if(_railtypes, [label](const RailTypeInfo &rti) { return rti.alternate_labels.contains(label); });
	}

	if (it != std::end(_railtypes)) return it->Index();

	/* No matching label was found, so it is invalid */
	return INVALID_RAILTYPE;
}