From b1192d32d988ba63c9fc6be1c0f3ae4756437359 Mon Sep 17 00:00:00 2001
From: Mikhail <99481254+DCFApixels@users.noreply.github.com>
Date: Sun, 15 Mar 2026 20:20:24 +0800
Subject: [PATCH] fxi tag pool checks/add ThrowNullComponent/add EcsRefPool to
 readme

---
 README-RU.md             | 1 +
 src/Pools/EcsPoolBase.cs | 7 ++++++-
 src/Pools/EcsTagPool.cs  | 2 ++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/README-RU.md b/README-RU.md
index b443b71..7a063b6 100644
--- a/README-RU.md
+++ b/README-RU.md
@@ -125,6 +125,7 @@ https://github.com/DCFApixels/DragonECS.git
     * [Графы](https://github.com/DCFApixels/DragonECS-Graphs)
 * Утилиты:
     * [Упрощенный синтаксис](https://gist.github.com/DCFApixels/d7bfbfb8cb70d141deff00be24f28ff0)
+    * [EcsRefPool](https://gist.github.com/DCFApixels/73e392ccabdd98b3d4a517017d8a3f22)
     * [Таймеры](https://gist.github.com/DCFApixels/71a416275660c465ece76242290400df)
     * [Однокадровые компоненты](https://gist.github.com/DCFApixels/46d512dbcf96c115b94c3af502461f60)
     * [Шаблоны кода IDE](https://gist.github.com/ctzcs/0ba948b0e53aa41fe1c87796a401660b) и [для Unity](https://gist.github.com/ctzcs/d4c7730cf6cd984fe6f9e0e3f108a0f1)
diff --git a/src/Pools/EcsPoolBase.cs b/src/Pools/EcsPoolBase.cs
index d7423e6..b91b462 100644
--- a/src/Pools/EcsPoolBase.cs
+++ b/src/Pools/EcsPoolBase.cs
@@ -62,7 +62,12 @@ namespace DCFApixels.DragonECS.PoolsCore
         [MethodImpl(MethodImplOptions.NoInlining)]
         public static void ThrowNullListener()
         {
-            throw new ArgumentNullException("listener is null");
+            throw new ArgumentNullException("Listener is null");
+        }
+        [MethodImpl(MethodImplOptions.NoInlining)]
+        public static void ThrowNullComponent()
+        {
+            throw new ArgumentNullException("Component is null");
         }
         [MethodImpl(MethodImplOptions.NoInlining)]
         public static void ThrowPoolLocked()
diff --git a/src/Pools/EcsTagPool.cs b/src/Pools/EcsTagPool.cs
index 74342b2..07e5713 100644
--- a/src/Pools/EcsTagPool.cs
+++ b/src/Pools/EcsTagPool.cs
@@ -116,6 +116,7 @@ namespace DCFApixels.DragonECS
         public void Add(int entityID)
         {
 #if DEBUG
+            if (entityID == EcsConsts.NULL_ENTITY_ID) { EcsPoolThrowHelper.ThrowEntityIsNotAlive(_world, entityID); }
             if (_world.IsUsed(entityID) == false) { EcsPoolThrowHelper.ThrowEntityIsNotAlive(_world, entityID); }
             if (Has(entityID)) { EcsPoolThrowHelper.ThrowAlreadyHasComponent<T>(entityID); }
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
@@ -144,6 +145,7 @@ namespace DCFApixels.DragonECS
         public void Del(int entityID)
         {
 #if DEBUG
+            if (entityID == EcsConsts.NULL_ENTITY_ID) { EcsPoolThrowHelper.ThrowEntityIsNotAlive(_world, entityID); }
             if (!Has(entityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
 #elif DRAGONECS_STABILITY_MODE