Merge pull request #496 from Cysharp/hadashiA/awaitable

Add EndOfFrame implementation using `UnityEngine.Awaitable`

README.md

@@ -84,8 +84,13 @@ async UniTask<string> DemoAsync()
     await UniTask.Yield();
     await UniTask.NextFrame();
 
-    // replacement of WaitForEndOfFrame(requires MonoBehaviour(CoroutineRunner))
+    // replacement of WaitForEndOfFrame
+#if UNITY_2023_1_OR_NEWER
+    await UniTask.WaitForEndOfFrame();
+#else
+    // requires MonoBehaviour(CoroutineRunner))
     await UniTask.WaitForEndOfFrame(this); // this is MonoBehaviour
+#endif
 
     // replacement of yield return new WaitForFixedUpdate(same as UniTask.Yield(PlayerLoopTiming.FixedUpdate))
     await UniTask.WaitForFixedUpdate();
@@ -497,6 +502,8 @@ It indicates when to run, you can check [PlayerLoopList.md](https://gist.github.
 `PlayerLoopTiming.Update` is similar to `yield return null` in a coroutine, but it is called before Update(Update and uGUI events(button.onClick, etc...) are called on `ScriptRunBehaviourUpdate`, yield return null is called on `ScriptRunDelayedDynamicFrameRate`). `PlayerLoopTiming.FixedUpdate` is similar to `WaitForFixedUpdate`.
 
 > `PlayerLoopTiming.LastPostLateUpdate` is not equivalent to coroutine's `yield return new WaitForEndOfFrame()`. Coroutine's WaitForEndOfFrame seems to run after the PlayerLoop is done. Some methods that require coroutine's end of frame(`Texture2D.ReadPixels`, `ScreenCapture.CaptureScreenshotAsTexture`, `CommandBuffer`, etc) do not work correctly when replaced with async/await. In these cases, pass MonoBehaviour(coroutine runnner) to `UniTask.WaitForEndOfFrame`. For example, `await UniTask.WaitForEndOfFrame(this);` is lightweight allocation free alternative of `yield return new WaitForEndOfFrame()`.
+> 
+> Note: In Unity 2023.1 or newer, `await UniTask.WaitForEndOfFrame();` no longer requires MonoBehaviour. It uses `UnityEngine.Awaitable.EndOfFrameAsync`.
 
 `yield return null` and `UniTask.Yield` are similar but different. `yield return null` always returns next frame but `UniTask.Yield` returns next called. That is, call `UniTask.Yield(PlayerLoopTiming.Update)` on `PreUpdate`, it returns same frame. `UniTask.NextFrame()` guarantees return next frame, you can expect this to behave exactly the same as `yield return null`.
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs

@@ -75,6 +75,12 @@ namespace Cysharp.Threading.Tasks
             return new UniTask(NextFramePromise.Create(timing, cancellationToken, out var token), token);
         }
 
+#if UNITY_2023_1_OR_NEWER
+        public static async UniTask WaitForEndOfFrame(CancellationToken cancellationToken = default)
+        {
+            await Awaitable.EndOfFrameAsync(cancellationToken);
+        }
+#else        
         [Obsolete("Use WaitForEndOfFrame(MonoBehaviour) instead or UniTask.Yield(PlayerLoopTiming.LastPostLateUpdate). Equivalent for coroutine's WaitForEndOfFrame requires MonoBehaviour(runner of Coroutine).")]
         public static YieldAwaitable WaitForEndOfFrame()
         {
@@ -86,6 +92,7 @@ namespace Cysharp.Threading.Tasks
         {
             return UniTask.Yield(PlayerLoopTiming.LastPostLateUpdate, cancellationToken);
         }
+#endif        
 
         public static UniTask WaitForEndOfFrame(MonoBehaviour coroutineRunner, CancellationToken cancellationToken = default)
         {