Function AppendCopyableBadgeList

src/newgrf_badge.cpp:250–264

* Append copyable badges from a list onto another. * Badges must exist and be marked with the Copy flag. * @param dst Destination badge list. * @param src Source badge list. * @param feature Feature of list. */

 * @param feature Feature of list.
 */
void AppendCopyableBadgeList(std::vector<BadgeID> &dst, std::span<const BadgeID> src, GrfSpecFeature feature)
{
	for (const BadgeID &index : src) {
		/* Is badge already present? */
		if (std::ranges::find(dst, index) != std::end(dst)) continue;

		/* Is badge copyable? */
		Badge *badge = GetBadge(index);
		if (badge == nullptr) continue;
		if (!badge->flags.Test(BadgeFlag::Copy)) continue;

		dst.push_back(index);
		badge->features.Set(feature);
	}
}

/** Apply features from all badges to their badge classes. */
void ApplyBadgeFeaturesToClassBadges()