add cancel parameter for Spawner::for_each

main.cpp

@@ -164,10 +164,11 @@ void update_tears() {
                 }
             }
 
-            enemy_spawner.for_each([&center, &active](auto &enemy) {
+            enemy_spawner.for_each([&center, &active](auto &enemy, auto& cancel) {
                 if (enemy.alive() && CheckCollisionCircles(center, player.tear_radius, enemy.center, enemy.radius)) {
                     active = false;
                     if (--enemy.hp == 0) score++;
+                    cancel = true;
                 }
             });
 
@@ -265,7 +266,7 @@ int main() {
             }
         }
 
-        enemy_spawner.for_each([now](Enemy &enemy) {
+        enemy_spawner.for_each([now](Enemy &enemy, auto& cancel) {
             if (enemy.alive()) {
                 enemy.center = Vector2MoveTowards(enemy.center, player.center(), enemy.speed);
                 const Color enemy_color = enemy.hp == 1 ? PINK : enemy.hp == 2 ? ORANGE : RED;
@@ -285,7 +286,7 @@ int main() {
             }
         });
 
-        item_spawner.for_each([&item_pickup_text_buffer, now, &item_last_picked_up](Item &item) {
+        item_spawner.for_each([&item_pickup_text_buffer, now, &item_last_picked_up](Item &item, auto& cancel) {
             if (!item.active) return;
 
             DrawCircleV(item.center, item.radius, item.color());

spawner.h

@@ -24,7 +24,9 @@ struct Spawner {
     void for_each(F&& func) {
         std::lock_guard lock{mutex};
         for (auto& value : values) {
-            func(value);
+            bool cancel = false;
+            func(value, cancel);
+            if (cancel) break;;
         }
     }