const reference in card::xyz_overlay

card.cpp

@@ -1569,12 +1569,11 @@ int32 card::get_old_union_count() {
 	}
 	return count;
 }
-void card::xyz_overlay(card_set* materials) {
-	if(materials->empty())
+void card::xyz_overlay(const card_set& materials) {
+	if(materials.empty())
 		return;
 	card_set des, leave_grave, leave_deck;
-	card_vector cv;
-	cv.assign(materials->begin(), materials->end());
+	card_vector cv(materials.begin(), materials.end());
 	std::sort(cv.begin(), cv.end(), card::card_operation_sort);
 	if(pduel->game_field->core.global_flag & GLOBALFLAG_DECK_REVERSE_CHECK) {
 		int32 d0 = (int32)pduel->game_field->player[0].list_main.size() - 1, s0 = d0;

card.h

@@ -285,7 +285,7 @@ public:
 	void unequip();
 	int32 get_union_count();
 	int32 get_old_union_count();
-	void xyz_overlay(card_set* materials);
+	void xyz_overlay(const card_set& materials);
 	void xyz_add(card* mat);
 	void xyz_remove(card* mat);
 	void apply_field_effect();

libduel.cpp

@@ -3631,11 +3631,10 @@ int32 scriptlib::duel_overlay(lua_State *L) {
 	} else
 		return luaL_error(L, "Parameter %d should be \"Card\" or \"Group\".", 2);
 	if(pcard) {
-		card_set cset;
-		cset.insert(pcard);
-		target->xyz_overlay(&cset);
+		card_set cset{ pcard };
+		target->xyz_overlay(cset);
 	} else
-		target->xyz_overlay(&pgroup->container);
+		target->xyz_overlay(pgroup->container);
 	uint32 adjust = TRUE;
 	if(lua_gettop(L) > 2) {
 		adjust = lua_toboolean(L, 3);