继续重构调整（UI）

- 引入 UniTask 和异步版本的 UIModule - 调整 Runtime/UIBase 和 Presentation 下的脚本命名空间到 SepCore.UI - 将原来的 5 层 UI 迁移到异步实现 - 规范各层的 UI 脚本命名
2026-06-03 09:58:37 +08:00
parent 6b8a6a8789
commit 7bba8bbb80
552 changed files with 83648 additions and 2726 deletions
@@ -0,0 +1,58 @@
+using Cysharp.Threading.Tasks.Internal;
+using System;
+using System.Threading;
+
+namespace Cysharp.Threading.Tasks.Linq
+{
+    public static partial class UniTaskAsyncEnumerable
+    {
+        public static UniTask<TSource> ElementAtAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, int index, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+
+            return ElementAt.ElementAtAsync(source, index, cancellationToken, false);
+        }
+
+        public static UniTask<TSource> ElementAtOrDefaultAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, int index, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+
+            return ElementAt.ElementAtAsync(source, index, cancellationToken, true);
+        }
+    }
+
+    internal static class ElementAt
+    {
+        public static async UniTask<TSource> ElementAtAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, int index, CancellationToken cancellationToken, bool defaultIfEmpty)
+        {
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                int i = 0;
+                while (await e.MoveNextAsync())
+                {
+                    if (i++ == index)
+                    {
+                        return e.Current;
+                    }
+                }
+
+                if (defaultIfEmpty)
+                {
+                    return default;
+                }
+                else
+                {
+                    throw Error.ArgumentOutOfRange(nameof(index));
+                }
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
+    }
+}