Function GetFreeWagonsInDepot

src/train_cmd.cpp:614–629

* Get a list of free wagons in a depot. * @param tile Tile of depot. * @return List of free wagons, sorted by vehicle index. */

 * @return List of free wagons, sorted by vehicle index.
 */
static std::vector<VehicleID> GetFreeWagonsInDepot(TileIndex tile)
{
	std::vector<VehicleID> free_wagons;

	for (Vehicle *v : VehiclesOnTile(tile)) {
		if (v->type != VEH_TRAIN) continue;
		if (v->vehstatus.Test(VehState::Crashed)) continue;
		if (!Train::From(v)->IsFreeWagon()) continue;

		free_wagons.push_back(v->index);
	}

	/* Sort by vehicle index for consistency across clients. */
	std::ranges::sort(free_wagons);
	return free_wagons;
}

/**
 * Build a railroad wagon.