Merge remote-tracking branch 'origin/master'

Fix ToCancellationToken

.github/workflows/build-debug.yml

@@ -42,13 +42,6 @@ jobs:
     steps:
       - run: apt update && apt install git -y
       - uses: actions/checkout@v2
-      # create unity activation file and store to artifacts.
-      - run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -logFile -createManualActivationFile || exit 0
-      - uses: actions/upload-artifact@v1
-        with:
-          name: Unity_v${{ matrix.unity }}.alf
-          path: ./Unity_v${{ matrix.unity }}.alf
-      # activate Unity from manual license file(ulf)
       - run: echo -n "$UNITY_LICENSE" >> .Unity.ulf
         env:
           UNITY_LICENSE: ${{ secrets[matrix.license] }}

README.md

@@ -34,6 +34,7 @@ Techinical details, see blog post: [UniTask v2 — Zero Allocation async/await f
 - [For Unit Testing](#for-unit-testing)
 - [Compare with Standard Task API](#compare-with-standard-task-api)
 - [Pooling Configuration](#pooling-configuration)
+- [Allocation on Profiler](#allocation-on-profiler)
 - [UniTaskSynchronizationContext](#unitasksynchronizationcontext)
 - [API References](#api-references)
 - [UPM Package](#upm-package)
@@ -151,25 +152,24 @@ UniTask provides three pattern of extension methods.
 
 > Note: WithCancellation is returned from native timing of PlayerLoop but ToUniTask is returned from specified PlayerLoopTiming. Details of timing, see: [PlayerLoop](#playerloop) section.
 
+> Note: AssetBundleRequest has `asset` and `allAssets`, in default await returns `asset`. If you want to get `allAssets`, you can use `AwaitForAllAssets()` method.
+
 The type of `UniTask` can use utility like `UniTask.WhenAll`, `UniTask.WhenAny`. It is like Task.WhenAll/WhenAny but return type is more useful, returns value tuple so can deconsrtuct each result and pass multiple type.
 
 ```csharp
-public class SceneAssets
+public async UniTaskVoid LoadManyAsync()
 {
-    public SceneAssets()
-    {
-        // parallel load.
-        var (a, b, c) = await UniTask.WhenAll(
-            LoadAsSprite("foo"),
-            LoadAsSprite("bar"),
-            LoadAsSprite("baz"));
-    }
+    // parallel load.
+    var (a, b, c) = await UniTask.WhenAll(
+        LoadAsSprite("foo"),
+        LoadAsSprite("bar"),
+        LoadAsSprite("baz"));
+}
 
-    async UniTask<Sprite> LoadAsSprite(string path)
-    {
-        var resource = await Resources.LoadAsync<Sprite>(path);
-        return (resource as Sprite);
-    }
+async UniTask<Sprite> LoadAsSprite(string path)
+{
+    var resource = await Resources.LoadAsync<Sprite>(path);
+    return (resource as Sprite);
 }
 ```
 
@@ -489,6 +489,8 @@ await UniTask.WhenAll(
     transform.DOScale(10, 3).WithCancellation(ct));
 ```
 
+DOTween support's default behaviour(`await`, `WithCancellation`, `ToUniTask`) awaits tween is killed. It works both Complete(true/false) and Kill(true/false). But if you want to tween reuse(`SetAutoKill(false)`), it does not work you expected. Or, if you want to await for another timing, the following extension methods exist in Tween, `AwaitForComplete`, `AwaitForPause`, `AwaitForPlay`, `AwaitForRewind`, `AwaitForStepComplete`.
+
 AsyncEnumerable and Async LINQ
 ---
 Unity 2020.2.0a12 supports C# 8.0 so you can use `await foreach`. This is the new Update notation in async era.
@@ -835,7 +837,15 @@ foreach (var (type, size) in TaskPool.GetCacheSizeInfo())
 }
 ```
 
-> In UnityEditor profiler shows allocation of compiler generated AsyncStateMachine but it only occurs in debug(development) build. C# Compiler generate AsyncStateMachine as class on Debug build and as struct on Release build.
+Allocation on Profiler
+---
+In UnityEditor profiler shows allocation of compiler generated AsyncStateMachine but it only occurs in debug(development) build. C# Compiler generate AsyncStateMachine as class on Debug build and as struct on Release build.
+
+After Unity 2020.1 supports Code Optimization option on UnityEditor(right, footer).
+
+![](https://user-images.githubusercontent.com/46207/89967342-2f944600-dc8c-11ea-99fc-0b74527a16f6.png)
+
+You can change C# compiler optimization to release, it removes AsyncStateMachine allocation. Andalso optimization option can set via `Compilation.CompilationPipeline-codeOptimization`, and `Compilation.CodeOptimization`.
 
 UniTaskSynchronizationContext
 ---
@@ -872,7 +882,7 @@ After Unity 2019.3.4f1, Unity 2020.1a21, that support path query parameter of gi
 
 or add `"com.cysharp.unitask": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask"` to `Packages/manifest.json`.
 
-If you want to set a target version, UniTask is using `*.*.*` release tag so you can specify a version like `#2.0.24`. For example `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.0.24`.
+If you want to set a target version, UniTask is using `*.*.*` release tag so you can specify a version like `#2.0.31`. For example `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.0.31`.
 
 ### Install via OpenUPM
 

src/UniTask/Assets/Plugins/UniTask/Editor/UniTask.Editor.asmdef

@@ -10,7 +10,7 @@
     "allowUnsafeCode": false,
     "overrideReferences": false,
     "precompiledReferences": [],
-    "autoReferenced": true,
+    "autoReferenced": false,
     "defineConstraints": [],
     "versionDefines": [],
     "noEngineReferences": false

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

@@ -30,10 +30,10 @@ namespace Cysharp.Threading.Tasks
                 return ToCancellationToken(task);
             }
 
-            var cts = new CancellationTokenSource();
+            var cts = CancellationTokenSource.CreateLinkedTokenSource(linkToken);
             ToCancellationTokenCore(task, cts).Forget();
 
-            return CancellationTokenSource.CreateLinkedTokenSource(linkToken).Token;
+            return cts.Token;
         }
 
         public static CancellationToken ToCancellationToken<T>(this UniTask<T> task)

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

@@ -44,6 +44,7 @@ namespace Cysharp.Threading.Tasks
 
             IEnumerator innerEnumerator;
             CancellationToken cancellationToken;
+            int initialFrame;
 
             UniTaskCompletionSourceCore<object> core;
 
@@ -66,10 +67,13 @@ namespace Cysharp.Threading.Tasks
 
                 result.innerEnumerator = ConsumeEnumerator(innerEnumerator);
                 result.cancellationToken = cancellationToken;
+                result.initialFrame = -1;
 
                 PlayerLoopHelper.AddAction(timing, result);
 
                 token = result.core.Version;
+
+                result.MoveNext(); // run immediately.
                 return result;
             }
 
@@ -108,6 +112,19 @@ namespace Cysharp.Threading.Tasks
                     return false;
                 }
 
+                if (initialFrame == -1)
+                {
+                    // Time can not touch in threadpool.
+                    if (PlayerLoopHelper.IsMainThread)
+                    {
+                        initialFrame = Time.frameCount;
+                    }
+                }
+                else if (initialFrame == Time.frameCount)
+                {
+                    return true; // already executed in first frame, skip.
+                }
+
                 try
                 {
                     if (innerEnumerator.MoveNext())
@@ -208,12 +225,12 @@ namespace Cysharp.Threading.Tasks
             static IEnumerator UnwrapWaitForSeconds(WaitForSeconds waitForSeconds)
             {
                 var second = (float)waitForSeconds_Seconds.GetValue(waitForSeconds);
-                var startTime = DateTimeOffset.UtcNow;
+                var elapsed = 0.0f;
                 while (true)
                 {
                     yield return null;
 
-                    var elapsed = (DateTimeOffset.UtcNow - startTime).TotalSeconds;
+                    elapsed += Time.deltaTime;
                     if (elapsed >= second)
                     {
                         break;

src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs

@@ -11,7 +11,6 @@ using System.Threading;
 
 namespace Cysharp.Threading.Tasks
 {
-    // The idea of TweenCancelBehaviour is borrowed from https://www.shibuya24.info/entry/dotween_async_await
     public enum TweenCancelBehaviour
     {
         Kill,
@@ -29,6 +28,16 @@ namespace Cysharp.Threading.Tasks
 
     public static class DOTweenAsyncExtensions
     {
+        enum CallbackType
+        {
+            Kill,
+            Complete,
+            Pause,
+            Play,
+            Rewind,
+            StepComplete
+        }
+
         public static TweenAwaiter GetAwaiter(this Tween tween)
         {
             return new TweenAwaiter(tween);
@@ -39,7 +48,7 @@ namespace Cysharp.Threading.Tasks
             Error.ThrowArgumentNullException(tween, nameof(tween));
 
             if (!tween.IsActive()) return UniTask.CompletedTask;
-            return new UniTask(TweenConfiguredSource.Create(tween, TweenCancelBehaviour.Kill, cancellationToken, out var token), token);
+            return new UniTask(TweenConfiguredSource.Create(tween, TweenCancelBehaviour.Kill, cancellationToken, CallbackType.Kill, out var token), token);
         }
 
         public static UniTask ToUniTask(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
@@ -47,7 +56,47 @@ namespace Cysharp.Threading.Tasks
             Error.ThrowArgumentNullException(tween, nameof(tween));
 
             if (!tween.IsActive()) return UniTask.CompletedTask;
-            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, out var token), token);
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Kill, out var token), token);
+        }
+
+        public static UniTask AwaitForComplete(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Complete, out var token), token);
+        }
+
+        public static UniTask AwaitForPause(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Pause, out var token), token);
+        }
+
+        public static UniTask AwaitForPlay(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Play, out var token), token);
+        }
+
+        public static UniTask AwaitForRewind(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Rewind, out var token), token);
+        }
+
+        public static UniTask AwaitForStepComplete(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.StepComplete, out var token), token);
         }
 
         public struct TweenAwaiter : ICriticalNotifyCompletion
@@ -95,12 +144,13 @@ namespace Cysharp.Threading.Tasks
 
             static readonly TweenCallback EmptyTweenCallback = () => { };
 
-            readonly TweenCallback onKillDelegate;
+            readonly TweenCallback onCompleteCallbackDelegate;
             readonly TweenCallback onUpdateDelegate;
 
             Tween tween;
             TweenCancelBehaviour cancelBehaviour;
             CancellationToken cancellationToken;
+            CallbackType callbackType;
             bool canceled;
 
             TweenCallback originalUpdateAction;
@@ -108,11 +158,11 @@ namespace Cysharp.Threading.Tasks
 
             TweenConfiguredSource()
             {
-                onKillDelegate = OnKill;
+                onCompleteCallbackDelegate = OnCompleteCallbackDelegate;
                 onUpdateDelegate = OnUpdate;
             }
 
-            public static IUniTaskSource Create(Tween tween, TweenCancelBehaviour cancelBehaviour, CancellationToken cancellationToken, out short token)
+            public static IUniTaskSource Create(Tween tween, TweenCancelBehaviour cancelBehaviour, CancellationToken cancellationToken, CallbackType callbackType, out short token)
             {
                 if (cancellationToken.IsCancellationRequested)
                 {
@@ -128,6 +178,7 @@ namespace Cysharp.Threading.Tasks
                 result.tween = tween;
                 result.cancelBehaviour = cancelBehaviour;
                 result.cancellationToken = cancellationToken;
+                result.callbackType = callbackType;
 
                 result.originalUpdateAction = tween.onUpdate;
                 result.canceled = false;
@@ -138,7 +189,30 @@ namespace Cysharp.Threading.Tasks
                 }
 
                 tween.onUpdate = result.onUpdateDelegate;
-                tween.onKill = result.onKillDelegate;
+
+                switch (callbackType)
+                {
+                    case CallbackType.Kill:
+                        tween.onKill = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Complete:
+                        tween.onComplete = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Pause:
+                        tween.onPause = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Play:
+                        tween.onPlay = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Rewind:
+                        tween.onRewind = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.StepComplete:
+                        tween.onStepComplete = result.onCompleteCallbackDelegate;
+                        break;
+                    default:
+                        break;
+                }
 
                 TaskTracker.TrackActiveTask(result, 3);
 
@@ -146,7 +220,7 @@ namespace Cysharp.Threading.Tasks
                 return result;
             }
 
-            void OnKill()
+            void OnCompleteCallbackDelegate()
             {
                 if (canceled)
                 {
@@ -199,7 +273,31 @@ namespace Cysharp.Threading.Tasks
                         this.tween.Complete(true);
                         break;
                     case TweenCancelBehaviour.CancelAwait:
-                        this.tween.onKill = EmptyTweenCallback; // replace to empty(avoid callback after Canceled(instance is returned to pool.)
+                        // replace to empty(avoid callback after Canceled(instance is returned to pool.)
+                        switch (callbackType)
+                        {
+                            case CallbackType.Kill:
+                                tween.onKill = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Complete:
+                                tween.onComplete = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Pause:
+                                tween.onPause = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Play:
+                                tween.onPlay = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Rewind:
+                                tween.onRewind = EmptyTweenCallback;
+                                break;
+                            case CallbackType.StepComplete:
+                                tween.onStepComplete = EmptyTweenCallback;
+                                break;
+                            default:
+                                break;
+                        }
+
                         this.core.TrySetCanceled(this.cancellationToken);
                         break;
                 }
@@ -272,7 +370,31 @@ namespace Cysharp.Threading.Tasks
                 TaskTracker.RemoveTracking(this);
                 core.Reset();
                 tween.onUpdate = originalUpdateAction;
-                tween.onKill = null;
+
+                switch (callbackType)
+                {
+                    case CallbackType.Kill:
+                        tween.onKill = null;
+                        break;
+                    case CallbackType.Complete:
+                        tween.onComplete = null;
+                        break;
+                    case CallbackType.Pause:
+                        tween.onPause = null;
+                        break;
+                    case CallbackType.Play:
+                        tween.onPlay = null;
+                        break;
+                    case CallbackType.Rewind:
+                        tween.onRewind = null;
+                        break;
+                    case CallbackType.StepComplete:
+                        tween.onStepComplete = null;
+                        break;
+                    default:
+                        break;
+                }
+
                 tween = default;
                 cancellationToken = default;
                 originalUpdateAction = default;

src/UniTask/Assets/Plugins/UniTask/Runtime/External/TextMeshPro/TextMeshProAsyncExtensions.cs

@@ -9,6 +9,7 @@ namespace Cysharp.Threading.Tasks
 {
     public static partial class TextMeshProAsyncExtensions
     {
+        // <string> -> Text
         public static void BindTo(this IUniTaskAsyncEnumerable<string> source, TMP_Text text, bool rebindOnError = true)
         {
             BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
@@ -62,6 +63,67 @@ namespace Cysharp.Threading.Tasks
                 }
             }
         }
+
+        // <T> -> Text
+
+        public static void BindTo<T>(this IUniTaskAsyncEnumerable<T> source, TMP_Text text, bool rebindOnError = true)
+        {
+            BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
+        }
+
+        public static void BindTo<T>(this IUniTaskAsyncEnumerable<T> source, TMP_Text text, CancellationToken cancellationToken, bool rebindOnError = true)
+        {
+            BindToCore(source, text, cancellationToken, rebindOnError).Forget();
+        }
+
+        public static void BindTo<T>(this AsyncReactiveProperty<T> source, TMP_Text text, bool rebindOnError = true)
+        {
+            BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
+        }
+
+        static async UniTaskVoid BindToCore<T>(IUniTaskAsyncEnumerable<T> source, TMP_Text text, CancellationToken cancellationToken, bool rebindOnError)
+        {
+            var repeat = false;
+            BIND_AGAIN:
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (true)
+                {
+                    bool moveNext;
+                    try
+                    {
+                        moveNext = await e.MoveNextAsync();
+                        repeat = false;
+                    }
+                    catch (Exception ex)
+                    {
+                        if (ex is OperationCanceledException) return;
+
+                        if (rebindOnError && !repeat)
+                        {
+                            repeat = true;
+                            goto BIND_AGAIN;
+                        }
+                        else
+                        {
+                            throw;
+                        }
+                    }
+
+                    if (!moveNext) return;
+
+                    text.text = e.Current.ToString();
+                }
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
     }
 }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/Subscribe.cs

@@ -63,6 +63,42 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, action, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
         // OnNext, OnError
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Action<TSource> onNext, Action<Exception> onError)
@@ -105,6 +141,46 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
         // OnNext, OnCompleted
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Action<TSource> onNext, Action onCompleted)
@@ -147,6 +223,46 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action onCompleted)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action onCompleted, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action onCompleted)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action onCompleted, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
+        }
+
         // IObserver
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, IObserver<TSource> observer)
@@ -195,7 +311,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current);
+                    try
+                    {
+                        onNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -227,7 +350,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current).Forget();
+                    try
+                    {
+                        onNext(e.Current).Forget();
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -259,7 +389,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current, cancellationToken).Forget();
+                    try
+                    {
+                        onNext(e.Current, cancellationToken).Forget();
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -291,7 +428,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    observer.OnNext(e.Current);
+                    try
+                    {
+                        observer.OnNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 observer.OnCompleted();
             }
@@ -309,5 +453,84 @@ namespace Cysharp.Threading.Tasks.Linq
                 }
             }
         }
+
+        public static async UniTaskVoid SubscribeAwaitCore<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError, Action onCompleted, CancellationToken cancellationToken)
+        {
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (await e.MoveNextAsync())
+                {
+                    try
+                    {
+                        await onNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
+                }
+                onCompleted();
+            }
+            catch (Exception ex)
+            {
+                if (onError == NopError)
+                {
+                    UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    return;
+                }
+
+                if (ex is OperationCanceledException) return;
+
+                onError(ex);
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
+
+        public static async UniTaskVoid SubscribeAwaitCore<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError, Action onCompleted, CancellationToken cancellationToken)
+        {
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (await e.MoveNextAsync())
+                {
+                    try
+                    {
+                        await onNext(e.Current, cancellationToken);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
+                }
+                onCompleted();
+            }
+            catch (Exception ex)
+            {
+                if (onError == NopError)
+                {
+                    UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    return;
+                }
+
+                if (ex is OperationCanceledException) return;
+
+                onError(ex);
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
+
     }
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/ToArray.cs

@@ -19,8 +19,6 @@ namespace Cysharp.Threading.Tasks.Linq
     {
         internal static async UniTask<TSource[]> ToArrayAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, CancellationToken cancellationToken)
         {
-            // UnityEngine.Debug.Log("Called ToArray");
-
             var pool = ArrayPool<TSource>.Shared;
             var array = pool.Rent(16);
 

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/UnityExtensions/EveryValueChanged.cs

@@ -208,7 +208,6 @@ namespace Cysharp.Threading.Tasks.Linq
 
             public bool MoveNext()
             {
-                UnityEngine.Debug.Log("TRY_RESULT:" + target.TryGetTarget(out var _));
                 if (disposed || cancellationToken.IsCancellationRequested || !target.TryGetTarget(out var t))
                 {
                     completionSource.TrySetResult(false);

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.asmdef

@@ -10,6 +10,11 @@
     "autoReferenced": true,
     "defineConstraints": [],
     "versionDefines": [
+        {
+            "name": "com.unity.modules.assetbundle",
+            "expression": "",
+            "define": "UNITASK_ASSETBUNDLE_SUPPORT"
+        }
     ],
     "noEngineReferences": false
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.AssetBundleRequestAllAssets.cs

@@ -1,6 +1,7 @@
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
 
 #if UNITY_2018_4 || UNITY_2019_4_OR_NEWER
+#if UNITASK_ASSETBUNDLE_SUPPORT
 
 using Cysharp.Threading.Tasks.Internal;
 using System;
@@ -312,4 +313,5 @@ namespace Cysharp.Threading.Tasks
     }
 }
 
+#endif
 #endif

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

@@ -605,6 +605,7 @@ namespace Cysharp.Threading.Tasks
 
         #endregion
 
+#if UNITASK_ASSETBUNDLE_SUPPORT
         #region AssetBundleRequest
 
         public static AssetBundleRequestAwaiter GetAwaiter(this AssetBundleRequest asyncOperation)
@@ -906,7 +907,9 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
+#endif
 
+#if UNITASK_ASSETBUNDLE_SUPPORT
         #region AssetBundleCreateRequest
 
         public static AssetBundleCreateRequestAwaiter GetAwaiter(this AssetBundleCreateRequest asyncOperation)
@@ -1208,6 +1211,7 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
+#endif
 
 #if ENABLE_UNITYWEBREQUEST
         #region UnityWebRequestAsyncOperation

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.tt

@@ -17,6 +17,7 @@
     Func<string, string> ToUniTaskReturnType = x => (x == "void") ? "UniTask" : $"UniTask<{x}>";
     Func<string, string> ToIUniTaskSourceReturnType = x => (x == "void") ? "IUniTaskSource" : $"IUniTaskSource<{x}>";
     Func<(string typeName, string returnType, string returnField), bool> IsUnityWebRequest = x => x.returnType == "UnityWebRequest";
+    Func<(string typeName, string returnType, string returnField), bool> IsAssetBundleModule = x => x.typeName == "AssetBundleRequest" || x.typeName == "AssetBundleCreateRequest";
     Func<(string typeName, string returnType, string returnField), bool> IsVoid = x => x.returnType == "void";
 #>
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
@@ -37,6 +38,8 @@ namespace Cysharp.Threading.Tasks
 <# foreach(var t in types) { #>
 <# if(IsUnityWebRequest(t)) { #>
 #if ENABLE_UNITYWEBREQUEST
+<# } else if(IsAssetBundleModule(t)) { #>
+#if UNITASK_ASSETBUNDLE_SUPPORT
 <# } #>
         #region <#= t.typeName #>
 
@@ -422,7 +425,7 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
-<# if(IsUnityWebRequest(t)) { #>
+<# if(IsUnityWebRequest(t) || IsAssetBundleModule(t)) { #>
 #endif
 <# } #>
 

src/UniTask/Assets/Plugins/UniTask/package.json

@@ -1,7 +1,7 @@
 {
     "name": "com.cysharp.unitask",
     "displayName": "UniTask",
-    "version": "2.0.27",
+    "version": "2.0.31",
     "unity": "2018.4",
     "description": "Provides an efficient async/await integration to Unity.",
     "keywords": [ "async/await", "async", "Task", "UniTask" ],

src/UniTask/Assets/Scenes/MiddlewareSample.cs

@@ -0,0 +1,471 @@
+using Cysharp.Threading.Tasks;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using UnityEngine;
+using UnityEngine.Networking;
+using UnityEngine.SceneManagement;
+using UnityEngine.UI;
+
+namespace Cysharp.Threading.Tasks.Sample
+{
+    //public class Sample2
+    //{
+    //    public Sample2()
+    //    {
+    //        // デコレーターの詰まったClientを生成（これは一度作ったらフィールドに保存可）
+    //        var client = new NetworkClient("http://localhost", TimeSpan.FromSeconds(10),
+    //            new QueueRequestDecorator(),
+    //            new LoggingDecorator(),
+    //            new AppendTokenDecorator(),
+    //            new SetupHeaderDecorator());
+
+
+    //        await client.PostAsync("/User/Register", new { Id = 100 });
+
+
+    //    }
+    //}
+
+
+    public class ReturnToTitleDecorator : IAsyncDecorator
+    {
+        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            try
+            {
+                return await next(context, cancellationToken);
+            }
+            catch (Exception ex)
+            {
+                if (ex is OperationCanceledException)
+                {
+                    // キャンセルはきっと想定されている処理なのでそのまんまスルー（呼び出し側でOperationCanceledExceptionとして飛んでいく)
+                    throw;
+                }
+
+                if (ex is UnityWebRequestException uwe)
+                {
+                    // ステータスコードを使って、タイトルに戻す例外です、とかリトライさせる例外です、とかハンドリングさせると便利
+                    // if (uwe.ResponseCode) { }...
+                }
+
+                // サーバー例外のMessageを直接出すなんて乱暴なことはデバッグ時だけですよ勿論。
+                var result = await MessageDialog.ShowAsync(ex.Message);
+
+                // OK か Cancelかで分岐するなら。今回はボタン一個、OKのみの想定なので無視
+                // if (result == DialogResult.Ok) { }...
+
+                // シーン呼び出しはawaitしないこと！awaitして正常終了しちゃうと、この通信の呼び出し元に処理が戻って続行してしまいます
+                // のでForget。
+                SceneManager.LoadSceneAsync("TitleScene").ToUniTask().Forget();
+
+
+                // そしてOperationCanceledExceptionを投げて、この通信の呼び出し元の処理はキャンセル扱いにして終了させる
+                throw new OperationCanceledException();
+            }
+        }
+    }
+
+    public enum DialogResult
+    {
+        Ok,
+        Cancel
+    }
+
+    public static class MessageDialog
+    {
+        public static async UniTask<DialogResult> ShowAsync(string message)
+        {
+            // (例えば)Prefabで作っておいたダイアログを生成する
+            var view = await Resources.LoadAsync("Prefabs/Dialog");
+
+            // Ok, Cancelボタンのどちらかが押されるのを待機
+            return await (view as GameObject).GetComponent<MessageDialogView>().ClickResult;
+        }
+    }
+
+    public class MessageDialogView : MonoBehaviour
+    {
+        [SerializeField] Button okButton = default;
+        [SerializeField] Button closeButton = default;
+
+        UniTaskCompletionSource<DialogResult> taskCompletion;
+
+        // これでどちらかが押されるまで無限に待つを表現
+        public UniTask<DialogResult> ClickResult => taskCompletion.Task;
+
+        private void Start()
+        {
+            taskCompletion = new UniTaskCompletionSource<DialogResult>();
+
+            okButton.onClick.AddListener(() =>
+            {
+                taskCompletion.TrySetResult(DialogResult.Ok);
+            });
+
+            closeButton.onClick.AddListener(() =>
+            {
+                taskCompletion.TrySetResult(DialogResult.Cancel);
+            });
+        }
+
+        // もしボタンが押されずに消滅した場合にネンノタメ。
+        private void OnDestroy()
+        {
+            taskCompletion.TrySetResult(DialogResult.Cancel);
+        }
+    }
+
+    public class MockDecorator : IAsyncDecorator
+    {
+        Dictionary<string, object> mock;
+
+        // Pathと型を1:1にして事前定義したオブジェクトを返す辞書を渡す
+        public MockDecorator(Dictionary<string, object> mock)
+        {
+            this.mock = mock;
+        }
+
+        public UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            if (mock.TryGetValue(context.Path, out var value))
+            {
+                // 一致したものがあればそれを返す（実際の通信は行わない）
+                return new UniTask<ResponseContext>(new ResponseContext(value));
+            }
+            else
+            {
+                return next(context, cancellationToken);
+            }
+        }
+    }
+
+    public class LoggingDecorator : IAsyncDecorator
+    {
+        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            var sw = Stopwatch.StartNew();
+            try
+            {
+                UnityEngine.Debug.Log("Start Network Request:" + context.Path);
+
+                var response = await next(context, cancellationToken);
+
+                UnityEngine.Debug.Log($"Complete Network Request: {context.Path} , Elapsed: {sw.Elapsed}, Size: {response.GetRawData().Length}");
+
+                return response;
+            }
+            catch (Exception ex)
+            {
+                if (ex is OperationCanceledException)
+                {
+                    UnityEngine.Debug.Log("Request Canceled:" + context.Path);
+                }
+                else if (ex is TimeoutException)
+                {
+                    UnityEngine.Debug.Log("Request Timeout:" + context.Path);
+                }
+                else if (ex is UnityWebRequestException webex)
+                {
+                    if (webex.IsHttpError)
+                    {
+                        UnityEngine.Debug.Log($"Request HttpError: {context.Path} Code:{webex.ResponseCode} Message:{webex.Message}");
+                    }
+                    else if (webex.IsNetworkError)
+                    {
+                        UnityEngine.Debug.Log($"Request NetworkError: {context.Path} Code:{webex.ResponseCode} Message:{webex.Message}");
+                    }
+                }
+                throw;
+            }
+            finally
+            {
+                /* log other */
+            }
+        }
+    }
+
+    public class SetupHeaderDecorator : IAsyncDecorator
+    {
+        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            context.RequestHeaders["x-app-timestamp"] = context.Timestamp.ToString();
+            context.RequestHeaders["x-user-id"] = "132141411"; // どこかから持ってくる
+            context.RequestHeaders["x-access-token"] = "fafafawfafewaea"; // どこかから持ってくる2
+
+            var respsonse = await next(context, cancellationToken);
+
+            var nextToken = respsonse.ResponseHeaders["token"];
+            // UserProfile.Token = nextToken; // どこかにセットするということにする
+
+            return respsonse;
+        }
+    }
+
+
+    public class AppendTokenDecorator : IAsyncDecorator
+    {
+        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            string token = "token"; // どっかから取ってくるということにする
+            RETRY:
+            try
+            {
+                context.RequestHeaders["x-accesss-token"] = token;
+                return await next(context, cancellationToken);
+            }
+            catch (UnityWebRequestException ex)
+            {
+                // 例えば700はTokenを再取得してください的な意味だったとする
+                if (ex.ResponseCode == 700)
+                {
+                    // 別口でTokenを取得します的な処理
+                    var newToken = await new NetworkClient(context.BasePath, context.Timeout).PostAsync<string>("/Auth/GetToken", "access_token", cancellationToken);
+                    context.Reset(this);
+                    goto RETRY;
+                }
+
+                goto RETRY;
+            }
+        }
+    }
+
+    public class QueueRequestDecorator : IAsyncDecorator
+    {
+        readonly Queue<(UniTaskCompletionSource<ResponseContext>, RequestContext, CancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>>)> q = new Queue<(UniTaskCompletionSource<ResponseContext>, RequestContext, CancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>>)>();
+        bool running;
+
+        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+        {
+            if (q.Count == 0)
+            {
+                return await next(context, cancellationToken);
+            }
+            else
+            {
+                var completionSource = new UniTaskCompletionSource<ResponseContext>();
+                q.Enqueue((completionSource, context, cancellationToken, next));
+                if (!running)
+                {
+                    Run().Forget();
+                }
+                return await completionSource.Task;
+            }
+        }
+
+        async UniTaskVoid Run()
+        {
+            running = true;
+            try
+            {
+                while (q.Count != 0)
+                {
+                    var (tcs, context, cancellationToken, next) = q.Dequeue();
+                    try
+                    {
+                        var response = await next(context, cancellationToken);
+                        tcs.TrySetResult(response);
+                    }
+                    catch (Exception ex)
+                    {
+                        tcs.TrySetException(ex);
+                    }
+                }
+            }
+            finally
+            {
+                running = false;
+            }
+        }
+    }
+
+
+    public class RequestContext
+    {
+        int decoratorIndex;
+        readonly IAsyncDecorator[] decorators;
+        Dictionary<string, string> headers;
+
+        public string BasePath { get; }
+        public string Path { get; }
+        public object Value { get; }
+        public TimeSpan Timeout { get; }
+        public DateTimeOffset Timestamp { get; private set; }
+
+        public IDictionary<string, string> RequestHeaders
+        {
+            get
+            {
+                if (headers == null)
+                {
+                    headers = new Dictionary<string, string>();
+                }
+                return headers;
+            }
+        }
+
+        public RequestContext(string basePath, string path, object value, TimeSpan timeout, IAsyncDecorator[] filters)
+        {
+            this.decoratorIndex = -1;
+            this.decorators = filters;
+            this.BasePath = basePath;
+            this.Path = path;
+            this.Value = value;
+            this.Timeout = timeout;
+            this.Timestamp = DateTimeOffset.UtcNow;
+        }
+
+        internal Dictionary<string, string> GetRawHeaders() => headers;
+        internal IAsyncDecorator GetNextDecorator() => decorators[++decoratorIndex];
+
+        public void Reset(IAsyncDecorator currentFilter)
+        {
+            decoratorIndex = Array.IndexOf(decorators, currentFilter);
+            if (headers != null)
+            {
+                headers.Clear();
+            }
+            Timestamp = DateTimeOffset.UtcNow;
+        }
+    }
+
+    public class ResponseContext
+    {
+        bool hasValue;
+        object value;
+        readonly byte[] bytes;
+
+        public long StatusCode { get; }
+        public Dictionary<string, string> ResponseHeaders { get; }
+
+        public ResponseContext(object value, Dictionary<string, string> header = null)
+        {
+            this.hasValue = true;
+            this.value = value;
+            this.StatusCode = 200;
+            this.ResponseHeaders = (header ?? new Dictionary<string, string>());
+        }
+
+        public ResponseContext(byte[] bytes, long statusCode, Dictionary<string, string> responseHeaders)
+        {
+            this.hasValue = false;
+            this.bytes = bytes;
+            this.StatusCode = statusCode;
+            this.ResponseHeaders = responseHeaders;
+        }
+
+        public byte[] GetRawData() => bytes;
+
+        public T GetResponseAs<T>()
+        {
+            if (hasValue)
+            {
+                return (T)value;
+            }
+
+            value = JsonUtility.FromJson<T>(Encoding.UTF8.GetString(bytes));
+            hasValue = true;
+            return (T)value;
+        }
+    }
+
+    public interface IAsyncDecorator
+    {
+        UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next);
+    }
+
+
+    public class NetworkClient : IAsyncDecorator
+    {
+        readonly Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next;
+        readonly IAsyncDecorator[] decorators;
+        readonly TimeSpan timeout;
+        readonly IProgress<float> progress;
+        readonly string basePath;
+
+        public NetworkClient(string basePath, TimeSpan timeout, params IAsyncDecorator[] decorators)
+            : this(basePath, timeout, null, decorators)
+        {
+        }
+
+        public NetworkClient(string basePath, TimeSpan timeout, IProgress<float> progress, params IAsyncDecorator[] decorators)
+        {
+            this.next = InvokeRecursive; // setup delegate
+
+            this.basePath = basePath;
+            this.timeout = timeout;
+            this.progress = progress;
+            this.decorators = new IAsyncDecorator[decorators.Length + 1];
+            Array.Copy(decorators, this.decorators, decorators.Length);
+            this.decorators[this.decorators.Length - 1] = this;
+        }
+
+        public async UniTask<T> PostAsync<T>(string path, T value, CancellationToken cancellationToken = default)
+        {
+            var request = new RequestContext(basePath, path, value, timeout, decorators);
+            var response = await InvokeRecursive(request, cancellationToken);
+            return response.GetResponseAs<T>();
+        }
+
+
+        UniTask<ResponseContext> InvokeRecursive(RequestContext context, CancellationToken cancellationToken)
+        {
+            return context.GetNextDecorator().SendAsync(context, cancellationToken, next); // マジカル再帰処理
+        }
+
+        async UniTask<ResponseContext> IAsyncDecorator.SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> _)
+        {
+            // Postしか興味ないからPostにしかしないよ！
+            // パフォーマンスを最大限にしたい場合はuploadHandler, downloadHandlerをカスタマイズすること
+
+            // JSONでbodyに送るというパラメータで送るという雑設定。
+            var data = JsonUtility.ToJson(context.Value);
+            var formData = new Dictionary<string, string> { { "body", data } };
+
+            using (var req = UnityWebRequest.Post(basePath + context.Path, formData))
+            {
+                var header = context.GetRawHeaders();
+                if (header != null)
+                {
+                    foreach (var item in header)
+                    {
+                        req.SetRequestHeader(item.Key, item.Value);
+                    }
+                }
+
+                // Timeout処理はCancellationTokenSourceのCancelAfterSlim(UniTask拡張)を使ってサクッと処理
+                var linkToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+                linkToken.CancelAfterSlim(timeout);
+                try
+                {
+                    // 完了待ちや終了処理はUniTaskの拡張自体に丸投げ
+                    await req.SendWebRequest().ToUniTask(progress: progress, cancellationToken: linkToken.Token);
+                }
+                catch (OperationCanceledException)
+                {
+                    // 元キャンセレーションソースがキャンセルしてなければTimeoutによるものと判定
+                    if (!cancellationToken.IsCancellationRequested)
+                    {
+                        throw new TimeoutException();
+                    }
+                }
+                finally
+                {
+                    // Timeoutに引っかからなかった場合にてるのでCancelAfterSlimの裏で回ってるループをこれで終わらせとく
+                    if (!linkToken.IsCancellationRequested)
+                    {
+                        linkToken.Cancel();
+                    }
+                }
+
+                // UnityWebRequestを先にDisposeしちゃうので先に必要なものを取得しておく（性能的には無駄なのでパフォーマンスを最大限にしたい場合は更に一工夫を）
+                return new ResponseContext(req.downloadHandler.data, req.responseCode, req.GetResponseHeaders());
+            }
+        }
+    }
+}

src/UniTask/Assets/Scenes/MiddlewareSample.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7fc39a4b35a8db44592cddc0b365942f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Scenes/SandboxMain.cs

@@ -17,6 +17,8 @@ using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 using UnityEngine.Rendering;
 using System.IO;
+using System.Linq.Expressions;
+using Cysharp.Threading.Tasks.Sample;
 
 
 // using DG.Tweening;
@@ -493,9 +495,11 @@ public class SandboxMain : MonoBehaviour
 
     async UniTaskVoid Start()
     {
-        RunStandardTaskAsync();
+        //Expression.Lambda<Func<int>>(null).Compile(true);
 
-        UnityEngine.Debug.Log("UniTaskPlayerLoop ready? " + PlayerLoopHelper.IsInjectedUniTaskPlayerLoop());
+        //RunStandardTaskAsync();
+
+        //UnityEngine.Debug.Log("UniTaskPlayerLoop ready? " + PlayerLoopHelper.IsInjectedUniTaskPlayerLoop());
 
         //var url =  "http://google.com/404";
         //var webRequestAsyncOperation = UnityWebRequest.Get(url).SendWebRequest();
@@ -524,8 +528,23 @@ public class SandboxMain : MonoBehaviour
         //UniTask.Delay(TimeSpan.FromSeconds(3)).
 
 
-        //okButton.onClick.AddListener(UniTask.UnityAction(async () =>
-        //{
+
+
+        okButton.onClick.AddListener(UniTask.UnityAction(async () =>
+        {
+
+            var client = new NetworkClient("http://localhost:5000", TimeSpan.FromSeconds(2),
+                new QueueRequestDecorator(),
+                new LoggingDecorator());
+            //new AppendTokenDecorator(),
+            //new SetupHeaderDecorator());
+
+
+            await client.PostAsync("", new { Id = 100 });
+
+
+        }));
+
         //    _ = ExecuteAsync();
 
         //    await UniTask.Yield();

src/UniTask/Assets/Tests/CoroutineToUniTaskTest.cs

@@ -0,0 +1,153 @@
+#if CSHARP_7_OR_LATER || (UNITY_2018_3_OR_NEWER && (NET_STANDARD_2_0 || NET_4_6))
+#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
+
+using UnityEngine;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEngine.UI;
+using UnityEngine.Scripting;
+using Cysharp.Threading.Tasks;
+using Unity.Collections;
+using System.Threading;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+using FluentAssertions;
+
+namespace Cysharp.Threading.TasksTests
+{
+    public class CoroutineToUniTaskTest
+    {
+        [UnityTest]
+        public IEnumerator EarlyUpdate() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.EarlyUpdate);
+
+            var l = new List<(int, int)>();
+            var currentFrame = Time.frameCount;
+            var t = Worker(l).ToUniTask();
+
+            l.Count.Should().Be(1);
+            l[0].Should().Be((0, currentFrame));
+
+            await t;
+
+            l[1].Should().Be((1, Time.frameCount));
+            l[1].Item2.Should().NotBe(currentFrame);
+        });
+
+        [UnityTest]
+        public IEnumerator LateUpdate() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.PostLateUpdate);
+
+            var l = new List<(int, int)>();
+            var currentFrame = Time.frameCount;
+            var t = Worker(l).ToUniTask();
+
+            l.Count.Should().Be(1);
+            l[0].Should().Be((0, currentFrame));
+
+            await t;
+
+            l[1].Should().Be((1, Time.frameCount));
+            l[1].Item2.Should().NotBe(currentFrame);
+        });
+
+        //[UnityTest]
+        //public IEnumerator TestCoroutine()
+        //{
+        //    yield return UniTask.Yield(PlayerLoopTiming.EarlyUpdate).ToUniTask().ToCoroutine();
+
+        //    var nanika = (UnityEngine.MonoBehaviour)GameObject.FindObjectOfType(typeof(UnityEngine.MonoBehaviour));
+
+        //    var l = new List<(int, int)>();
+        //    var currentFrame = Time.frameCount;
+        //    var t = nanika.StartCoroutine(Worker(l));
+
+        //    l.Count.Should().Be(1);
+        //    l[0].Should().Be((0, currentFrame));
+
+        //    yield return t;
+
+        //    l[1].Should().Be((1, Time.frameCount));
+        //    l[1].Item2.Should().NotBe(currentFrame);
+        //}
+
+        //[UnityTest]
+        //public IEnumerator TestCoroutine2()
+        //{
+        //    yield return UniTask.Yield(PlayerLoopTiming.PostLateUpdate).ToUniTask().ToCoroutine();
+
+        //    var nanika = (UnityEngine.MonoBehaviour)GameObject.FindObjectOfType(typeof(UnityEngine.MonoBehaviour));
+
+        //    var l = new List<(int, int)>();
+        //    var currentFrame = Time.frameCount;
+        //    var t = nanika.StartCoroutine(Worker(l));
+
+        //    l.Count.Should().Be(1);
+        //    l[0].Should().Be((0, currentFrame));
+
+        //    yield return t;
+
+        //    l[1].Should().Be((1, Time.frameCount));
+        //    l[1].Item2.Should().NotBe(currentFrame);
+        //}
+
+        [UnityTest]
+        public IEnumerator WaitForSecondsTest() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.PostLateUpdate);
+
+            Time.timeScale = 0.5f;
+            try
+            {
+                var now = DateTimeOffset.UtcNow;
+
+                await WaitFor();
+
+                var elapsed = DateTimeOffset.UtcNow - now;
+
+                (5.8f <= elapsed.TotalSeconds && elapsed.TotalSeconds <= 6.2f).Should().BeTrue();
+            }
+            finally
+            {
+                Time.timeScale = 1.0f;
+            }
+        });
+
+        IEnumerator WaitFor()
+        {
+            yield return new WaitForSeconds(3.0f);
+        }
+
+        IEnumerator Worker(List<(int, int)> l)
+        {
+            l.Add((0, Time.frameCount));
+            yield return null;
+            l.Add((1, Time.frameCount));
+        }
+
+        public async UniTask Foo()
+        {
+            var tasks = new List<UniTask>();
+            var t = Bar<int>();
+            tasks.Add(t);
+
+            t = Bar<int>();
+            tasks.Add(t);
+
+            await UniTask.WhenAll(tasks);
+        }
+
+        public async UniTask<T> Bar<T>()
+        {
+            await UniTask.Yield();
+            return default(T);
+        }
+    }
+}
+
+#endif

src/UniTask/Assets/Tests/CoroutineToUniTaskTest.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 43ffb719370515746932af3732ce073e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/ProjectSettings/ProjectSettings.asset

@@ -111,6 +111,8 @@ PlayerSettings:
   switchNVNShaderPoolsGranularity: 33554432
   switchNVNDefaultPoolsGranularity: 16777216
   switchNVNOtherPoolsGranularity: 16777216
+  stadiaPresentMode: 0
+  stadiaTargetFramerate: 0
   vulkanNumSwapchainBuffers: 3
   vulkanEnableSetSRGBWrite: 0
   m_SupportedAspectRatios:
@@ -191,22 +193,6 @@ PlayerSettings:
   uIStatusBarHidden: 1
   uIExitOnSuspend: 0
   uIStatusBarStyle: 0
-  iPhoneSplashScreen: {fileID: 0}
-  iPhoneHighResSplashScreen: {fileID: 0}
-  iPhoneTallHighResSplashScreen: {fileID: 0}
-  iPhone47inSplashScreen: {fileID: 0}
-  iPhone55inPortraitSplashScreen: {fileID: 0}
-  iPhone55inLandscapeSplashScreen: {fileID: 0}
-  iPhone58inPortraitSplashScreen: {fileID: 0}
-  iPhone58inLandscapeSplashScreen: {fileID: 0}
-  iPadPortraitSplashScreen: {fileID: 0}
-  iPadHighResPortraitSplashScreen: {fileID: 0}
-  iPadLandscapeSplashScreen: {fileID: 0}
-  iPadHighResLandscapeSplashScreen: {fileID: 0}
-  iPhone65inPortraitSplashScreen: {fileID: 0}
-  iPhone65inLandscapeSplashScreen: {fileID: 0}
-  iPhone61inPortraitSplashScreen: {fileID: 0}
-  iPhone61inLandscapeSplashScreen: {fileID: 0}
   appleTVSplashScreen: {fileID: 0}
   appleTVSplashScreen2x: {fileID: 0}
   tvOSSmallIconLayers: []
@@ -566,7 +552,8 @@ PlayerSettings:
   scriptingRuntimeVersion: 1
   gcIncremental: 0
   gcWBarrierValidation: 0
-  apiCompatibilityLevelPerPlatform: {}
+  apiCompatibilityLevelPerPlatform:
+    Standalone: 6
   m_RenderingPath: 1
   m_MobileRenderingPath: 1
   metroPackageName: Template_2D
@@ -621,6 +608,7 @@ PlayerSettings:
   XboxOnePersistentLocalStorageSize: 0
   XboxOneXTitleMemory: 8
   XboxOneOverrideIdentityName: 
+  XboxOneOverrideIdentityPublisher: 
   vrEditorSettings:
     daydream:
       daydreamIconForeground: {fileID: 0}