更新Demo

2025-08-14 16:51:28 +00:00 · 2023-12-20 12:14:27 +08:00
parent f64bb37706
commit 17a5d7425c
847 changed files with 106095 additions and 0 deletions
--- a/UnityProject/Packages/UniTask/Runtime/Linq/AppendPrepend.cs
+++ b/UnityProject/Packages/UniTask/Runtime/Linq/AppendPrepend.cs
@@ -0,0 +1,151 @@
+using Cysharp.Threading.Tasks.Internal;
+using System;
+using System.Threading;
+
+namespace Cysharp.Threading.Tasks.Linq
+{
+    public static partial class UniTaskAsyncEnumerable
+    {
+        public static IUniTaskAsyncEnumerable<TSource> Append<TSource>(this IUniTaskAsyncEnumerable<TSource> source, TSource element)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+
+            return new AppendPrepend<TSource>(source, element, true);
+        }
+
+        public static IUniTaskAsyncEnumerable<TSource> Prepend<TSource>(this IUniTaskAsyncEnumerable<TSource> source, TSource element)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+
+            return new AppendPrepend<TSource>(source, element, false);
+        }
+    }
+
+    internal sealed class AppendPrepend<TSource> : IUniTaskAsyncEnumerable<TSource>
+    {
+        readonly IUniTaskAsyncEnumerable<TSource> source;
+        readonly TSource element;
+        readonly bool append; // or prepend
+
+        public AppendPrepend(IUniTaskAsyncEnumerable<TSource> source, TSource element, bool append)
+        {
+            this.source = source;
+            this.element = element;
+            this.append = append;
+        }
+
+        public IUniTaskAsyncEnumerator<TSource> GetAsyncEnumerator(CancellationToken cancellationToken = default)
+        {
+            return new _AppendPrepend(source, element, append, cancellationToken);
+        }
+
+        sealed class _AppendPrepend : MoveNextSource, IUniTaskAsyncEnumerator<TSource>
+        {
+            enum State : byte
+            {
+                None,
+                RequirePrepend,
+                RequireAppend,
+                Completed
+            }
+
+            static readonly Action<object> MoveNextCoreDelegate = MoveNextCore;
+
+            readonly IUniTaskAsyncEnumerable<TSource> source;
+            readonly TSource element;
+            CancellationToken cancellationToken;
+
+            State state;
+            IUniTaskAsyncEnumerator<TSource> enumerator;
+            UniTask<bool>.Awaiter awaiter;
+
+            public _AppendPrepend(IUniTaskAsyncEnumerable<TSource> source, TSource element, bool append, CancellationToken cancellationToken)
+            {
+                this.source = source;
+                this.element = element;
+                this.state = append ? State.RequireAppend : State.RequirePrepend;
+                this.cancellationToken = cancellationToken;
+
+                TaskTracker.TrackActiveTask(this, 3);
+            }
+
+            public TSource Current { get; private set; }
+
+
+            public UniTask<bool> MoveNextAsync()
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+                completionSource.Reset();
+
+                if (enumerator == null)
+                {
+                    if (state == State.RequirePrepend)
+                    {
+                        Current = element;
+                        state = State.None;
+                        return CompletedTasks.True;
+                    }
+
+                    enumerator = source.GetAsyncEnumerator(cancellationToken);
+                }
+
+                if (state == State.Completed)
+                {
+                    return CompletedTasks.False;
+                }
+
+                awaiter = enumerator.MoveNextAsync().GetAwaiter();
+
+                if (awaiter.IsCompleted)
+                {
+                    MoveNextCoreDelegate(this);
+                }
+                else
+                {
+                    awaiter.SourceOnCompleted(MoveNextCoreDelegate, this);
+                }
+
+                return new UniTask<bool>(this, completionSource.Version);
+            }
+
+            static void MoveNextCore(object state)
+            {
+                var self = (_AppendPrepend)state;
+
+                if (self.TryGetResult(self.awaiter, out var result))
+                {
+                    if (result)
+                    {
+                        self.Current = self.enumerator.Current;
+                        self.completionSource.TrySetResult(true);
+                    }
+                    else
+                    {
+                        if (self.state == State.RequireAppend)
+                        {
+                            self.state = State.Completed;
+                            self.Current = self.element;
+                            self.completionSource.TrySetResult(true);
+                        }
+                        else
+                        {
+                            self.state = State.Completed;
+                            self.completionSource.TrySetResult(false);
+                        }
+                    }
+                }
+            }
+
+            public UniTask DisposeAsync()
+            {
+                TaskTracker.RemoveTracking(this);
+                if (enumerator != null)
+                {
+                    return enumerator.DisposeAsync();
+                }
+                return default;
+            }
+        }
+    }
+
+}