Function GetActiveCargoLabel

src/newgrf.cpp:612–619

* Find first cargo label that exists and is active from a list of cargo labels. * @param labels List of cargo labels. * @returns First cargo label in list that exists, or CT_INVALID if none exist. */

 * @returns First cargo label in list that exists, or CT_INVALID if none exist.
 */
static CargoLabel GetActiveCargoLabel(const std::initializer_list<CargoLabel> &labels)
{
	for (const CargoLabel &label : labels) {
		CargoType cargo_type = GetCargoTypeByLabel(label);
		if (cargo_type != INVALID_CARGO) return label;
	}
	return CT_INVALID;
}

/**
 * Get active cargo label from either a cargo label or climate-dependent mixed cargo type.