| using Cysharp.Threading.Tasks.Internal; | 
| using System; | 
| using System.Threading; | 
|   | 
| namespace Cysharp.Threading.Tasks.Linq | 
| { | 
|     public static partial class UniTaskAsyncEnumerable | 
|     { | 
|         public static UniTask<long> LongCountAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, CancellationToken cancellationToken = default) | 
|         { | 
|             Error.ThrowArgumentNullException(source, nameof(source)); | 
|   | 
|             return LongCount.LongCountAsync(source, cancellationToken); | 
|         } | 
|   | 
|         public static UniTask<long> LongCountAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, Boolean> predicate, CancellationToken cancellationToken = default) | 
|         { | 
|             Error.ThrowArgumentNullException(source, nameof(source)); | 
|             Error.ThrowArgumentNullException(predicate, nameof(predicate)); | 
|   | 
|             return LongCount.LongCountAsync(source, predicate, cancellationToken); | 
|         } | 
|   | 
|         public static UniTask<long> LongCountAwaitAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask<Boolean>> predicate, CancellationToken cancellationToken = default) | 
|         { | 
|             Error.ThrowArgumentNullException(source, nameof(source)); | 
|             Error.ThrowArgumentNullException(predicate, nameof(predicate)); | 
|   | 
|             return LongCount.LongCountAwaitAsync(source, predicate, cancellationToken); | 
|         } | 
|   | 
|         public static UniTask<long> LongCountAwaitWithCancellationAsync<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask<Boolean>> predicate, CancellationToken cancellationToken = default) | 
|         { | 
|             Error.ThrowArgumentNullException(source, nameof(source)); | 
|             Error.ThrowArgumentNullException(predicate, nameof(predicate)); | 
|   | 
|             return LongCount.LongCountAwaitWithCancellationAsync(source, predicate, cancellationToken); | 
|         } | 
|     } | 
|   | 
|     internal static class LongCount | 
|     { | 
|         internal static async UniTask<long> LongCountAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, CancellationToken cancellationToken) | 
|         { | 
|             long count = 0; | 
|   | 
|             var e = source.GetAsyncEnumerator(cancellationToken); | 
|             try | 
|             { | 
|                 while (await e.MoveNextAsync()) | 
|                 { | 
|                     checked { count++; } | 
|                 } | 
|             } | 
|             finally | 
|             { | 
|                 if (e != null) | 
|                 { | 
|                     await e.DisposeAsync(); | 
|                 } | 
|             } | 
|   | 
|             return count; | 
|         } | 
|   | 
|         internal static async UniTask<long> LongCountAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, Boolean> predicate, CancellationToken cancellationToken) | 
|         { | 
|             long count = 0; | 
|   | 
|             var e = source.GetAsyncEnumerator(cancellationToken); | 
|             try | 
|             { | 
|                 while (await e.MoveNextAsync()) | 
|                 { | 
|                     if (predicate(e.Current)) | 
|                     { | 
|                         checked { count++; } | 
|                     } | 
|                 } | 
|             } | 
|             finally | 
|             { | 
|                 if (e != null) | 
|                 { | 
|                     await e.DisposeAsync(); | 
|                 } | 
|             } | 
|   | 
|             return count; | 
|         } | 
|   | 
|         internal static async UniTask<long> LongCountAwaitAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask<Boolean>> predicate, CancellationToken cancellationToken) | 
|         { | 
|             long count = 0; | 
|   | 
|             var e = source.GetAsyncEnumerator(cancellationToken); | 
|             try | 
|             { | 
|                 while (await e.MoveNextAsync()) | 
|                 { | 
|                     if (await predicate(e.Current)) | 
|                     { | 
|                         checked { count++; } | 
|                     } | 
|                 } | 
|             } | 
|             finally | 
|             { | 
|                 if (e != null) | 
|                 { | 
|                     await e.DisposeAsync(); | 
|                 } | 
|             } | 
|   | 
|             return count; | 
|         } | 
|   | 
|         internal static async UniTask<long> LongCountAwaitWithCancellationAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask<Boolean>> predicate, CancellationToken cancellationToken) | 
|         { | 
|             long count = 0; | 
|   | 
|             var e = source.GetAsyncEnumerator(cancellationToken); | 
|             try | 
|             { | 
|                 while (await e.MoveNextAsync()) | 
|                 { | 
|                     if (await predicate(e.Current, cancellationToken)) | 
|                     { | 
|                         checked { count++; } | 
|                     } | 
|                 } | 
|             } | 
|             finally | 
|             { | 
|                 if (e != null) | 
|                 { | 
|                     await e.DisposeAsync(); | 
|                 } | 
|             } | 
|   | 
|             return count; | 
|         } | 
|     } | 
| } |