reactive/Ix.NET/Source/System.Linq.Async/System/Linq/AsyncEnumerable.AsyncOverloads.cs

// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information. 

#if SUPPORT_FLAT_ASYNC_API

using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace System.Linq
{
    partial class AsyncEnumerable
    {
        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsync<TSource>(source, accumulator, cancellationToken);
        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitAsync<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitAsync<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsync<TSource>(source, action, cancellationToken);
        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, Task> action, CancellationToken cancellationToken) => ForEachAwaitAsync<TSource>(source, action, cancellationToken);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => GroupByAwait<TSource, TKey>(source, keySelector);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwait<TSource, TKey>(source, keySelector, comparer);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector) => GroupByAwait<TSource, TKey, TElement>(source, keySelector, elementSelector);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector) => GroupByAwait<TSource, TKey, TResult>(source, keySelector, resultSelector);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector) => GroupByAwait<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwait<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwait<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwait<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector) => GroupJoinAwait<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
        public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwait<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector) => JoinAwait<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
        public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, ValueTask<TKey>> outerKeySelector, Func<TInner, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwait<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource, TResult>(source, selector, cancellationToken);
        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitAsync<TSource, TResult>(source, selector, cancellationToken);
        public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByAwait<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwait<TSource, TKey>(source, keySelector, comparer);
        public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => OrderByDescendingAwait<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByDescendingAwait<TSource, TKey>(source, keySelector, comparer);
        public static IAsyncEnumerable<TResult> Select<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TResult>> selector) => SelectAwait<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> Select<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<TResult>> selector) => SelectAwait<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwait<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwait<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwait<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, ValueTask<TResult>> resultSelector) => SelectManyAwait<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitAsync<TSource>(source, predicate, cancellationToken);
        public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => SkipWhileAwait<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => SkipWhileAwait<TSource>(source, predicate);
        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitAsync<TSource>(source, selector, cancellationToken);
        public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => TakeWhileAwait<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => TakeWhileAwait<TSource>(source, predicate);
        public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByAwait<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwait<TSource, TKey>(source, keySelector, comparer);
        public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector) => ThenByDescendingAwait<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwait<TSource, TKey>(source, keySelector, comparer);
        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsync<TSource, TKey>(source, keySelector, cancellationToken);
        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsync<TSource, TKey>(source, keySelector, comparer, cancellationToken);
        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitAsync<TSource, TKey>(source, keySelector, cancellationToken);
        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsync<TSource, TKey>(source, keySelector, comparer, cancellationToken);
        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<TKey>> keySelector, Func<TSource, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
        public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, ValueTask<bool>> predicate) => WhereAwait<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, ValueTask<bool>> predicate) => WhereAwait<TSource>(source, predicate);
        public static IAsyncEnumerable<TResult> Zip<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, ValueTask<TResult>> selector) => ZipAwait<TFirst, TSecond, TResult>(first, second, selector);

#if !NO_DEEP_CANCELLATION
        public static ValueTask<TSource> AggregateAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, TSource, CancellationToken, ValueTask<TSource>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsync<TSource>(source, accumulator, cancellationToken);
        public static ValueTask<TAccumulate> AggregateAsync<TSource, TAccumulate>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsync<TSource, TAccumulate>(source, seed, accumulator, cancellationToken);
        public static ValueTask<TResult> AggregateAsync<TSource, TAccumulate, TResult>(this IAsyncEnumerable<TSource> source, TAccumulate seed, Func<TAccumulate, TSource, CancellationToken, ValueTask<TAccumulate>> accumulator, Func<TAccumulate, CancellationToken, ValueTask<TResult>> resultSelector, CancellationToken cancellationToken) => AggregateAwaitWithCancellationAsync<TSource, TAccumulate, TResult>(source, seed, accumulator, resultSelector, cancellationToken);
        public static ValueTask<bool> AllAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AllAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<bool> AnyAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => AnyAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> AverageAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => AverageAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> CountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => CountAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> FirstAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> FirstOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => FirstOrDefaultAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsync<TSource>(source, action, cancellationToken);
        public static Task ForEachAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, Task> action, CancellationToken cancellationToken) => ForEachAwaitWithCancellationAsync<TSource>(source, action, cancellationToken);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => GroupByAwaitWithCancellation<TSource, TKey>(source, keySelector);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TSource>> GroupBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellation<TSource, TKey>(source, keySelector, comparer);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector) => GroupByAwaitWithCancellation<TSource, TKey, TElement>(source, keySelector, elementSelector);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellation<TSource, TKey, TResult>(source, keySelector, resultSelector);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupByAwaitWithCancellation<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector);
        public static IAsyncEnumerable<IAsyncGrouping<TKey, TElement>> GroupBy<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellation<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TKey, IAsyncEnumerable<TSource>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellation<TSource, TKey, TResult>(source, keySelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupBy<TSource, TKey, TElement, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, Func<TKey, IAsyncEnumerable<TElement>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupByAwaitWithCancellation<TSource, TKey, TElement, TResult>(source, keySelector, elementSelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector) => GroupJoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
        public static IAsyncEnumerable<TResult> GroupJoin<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, IAsyncEnumerable<TInner>, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => GroupJoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
        public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector) => JoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector);
        public static IAsyncEnumerable<TResult> Join<TOuter, TInner, TKey, TResult>(this IAsyncEnumerable<TOuter> outer, IAsyncEnumerable<TInner> inner, Func<TOuter, CancellationToken, ValueTask<TKey>> outerKeySelector, Func<TInner, CancellationToken, ValueTask<TKey>> innerKeySelector, Func<TOuter, TInner, CancellationToken, ValueTask<TResult>> resultSelector, IEqualityComparer<TKey> comparer) => JoinAwaitWithCancellation<TOuter, TInner, TKey, TResult>(outer, inner, outerKeySelector, innerKeySelector, resultSelector, comparer);
        public static ValueTask<TSource> LastAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> LastOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LastOrDefaultAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<long> LongCountAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => LongCountAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<long> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<TResult> MaxAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource, TResult>(source, selector, cancellationToken);
        public static ValueTask<int> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int?> MaxAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MaxAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> MinAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<TResult> MinAsync<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector, CancellationToken cancellationToken) => MinAwaitWithCancellationAsync<TSource, TResult>(source, selector, cancellationToken);
        public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByAwaitWithCancellation<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> OrderBy<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByAwaitWithCancellation<TSource, TKey>(source, keySelector, comparer);
        public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => OrderByDescendingAwaitWithCancellation<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> OrderByDescending<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => OrderByDescendingAwaitWithCancellation<TSource, TKey>(source, keySelector, comparer);
        public static IAsyncEnumerable<TResult> Select<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TResult>> selector) => SelectAwaitWithCancellation<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> Select<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<TResult>> selector) => SelectAwaitWithCancellation<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitWithCancellation<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TResult>>> selector) => SelectManyAwaitWithCancellation<TSource, TResult>(source, selector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellation<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
        public static IAsyncEnumerable<TResult> SelectMany<TSource, TCollection, TResult>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<IAsyncEnumerable<TCollection>>> collectionSelector, Func<TSource, TCollection, CancellationToken, ValueTask<TResult>> resultSelector) => SelectManyAwaitWithCancellation<TSource, TCollection, TResult>(source, collectionSelector, resultSelector);
        public static ValueTask<TSource> SingleAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static ValueTask<TSource> SingleOrDefaultAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate, CancellationToken cancellationToken) => SingleOrDefaultAwaitWithCancellationAsync<TSource>(source, predicate, cancellationToken);
        public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellation<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> SkipWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => SkipWhileAwaitWithCancellation<TSource>(source, predicate);
        public static ValueTask<int?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal?> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal?>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<int> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<int>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<long> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<long>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<float> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<float>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<double> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<double>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static ValueTask<decimal> SumAsync<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<decimal>> selector, CancellationToken cancellationToken) => SumAwaitWithCancellationAsync<TSource>(source, selector, cancellationToken);
        public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellation<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> TakeWhile<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => TakeWhileAwaitWithCancellation<TSource>(source, predicate);
        public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByAwaitWithCancellation<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> ThenBy<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByAwaitWithCancellation<TSource, TKey>(source, keySelector, comparer);
        public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector) => ThenByDescendingAwaitWithCancellation<TSource, TKey>(source, keySelector);
        public static IOrderedAsyncEnumerable<TSource> ThenByDescending<TSource, TKey>(this IOrderedAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IComparer<TKey> comparer) => ThenByDescendingAwaitWithCancellation<TSource, TKey>(source, keySelector, comparer);
        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(source, keySelector, cancellationToken);
        public static ValueTask<Dictionary<TKey, TSource>> ToDictionaryAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsync<TSource, TKey>(source, keySelector, comparer, cancellationToken);
        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
        public static ValueTask<Dictionary<TKey, TElement>> ToDictionaryAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToDictionaryAwaitWithCancellationAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsync<TSource, TKey>(source, keySelector, cancellationToken);
        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, cancellationToken);
        public static ValueTask<ILookup<TKey, TSource>> ToLookupAsync<TSource, TKey>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsync<TSource, TKey>(source, keySelector, comparer, cancellationToken);
        public static ValueTask<ILookup<TKey, TElement>> ToLookupAsync<TSource, TKey, TElement>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<TKey>> keySelector, Func<TSource, CancellationToken, ValueTask<TElement>> elementSelector, IEqualityComparer<TKey> comparer, CancellationToken cancellationToken) => ToLookupAwaitWithCancellationAsync<TSource, TKey, TElement>(source, keySelector, elementSelector, comparer, cancellationToken);
        public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellation<TSource>(source, predicate);
        public static IAsyncEnumerable<TSource> Where<TSource>(this IAsyncEnumerable<TSource> source, Func<TSource, int, CancellationToken, ValueTask<bool>> predicate) => WhereAwaitWithCancellation<TSource>(source, predicate);
        public static IAsyncEnumerable<TResult> Zip<TFirst, TSecond, TResult>(this IAsyncEnumerable<TFirst> first, IAsyncEnumerable<TSecond> second, Func<TFirst, TSecond, CancellationToken, ValueTask<TResult>> selector) => ZipAwaitWithCancellation<TFirst, TSecond, TResult>(first, second, selector);
#endif
    }
}

#endif