Move to partial standard IAsyncEnumerator API

Author: akarnokd

async-enumerable-dotnet-test/TestHelper.cs

@@ -22,7 +22,7 @@ public static ValueTask AssertResult<T>(this async_enumerable_dotnet.IAsyncEnume
         }
 
         // ReSharper disable once ParameterOnlyUsedForPreconditionCheck.Global
-        public static async ValueTask AssertResult<T>(this async_enumerable_dotnet.IAsyncEnumerator<T> source, params T[] values)
+        public static async ValueTask AssertResult<T>(this IAsyncEnumerator<T> source, params T[] values)
         {
             var main = default(Exception);
             var dispose = default(Exception);
@@ -127,7 +127,7 @@ public static ValueTask AssertFailure<T>(this async_enumerable_dotnet.IAsyncEnum
         }
 
         // ReSharper disable once ParameterOnlyUsedForPreconditionCheck.Global
-        public static async ValueTask AssertFailure<T>(this async_enumerable_dotnet.IAsyncEnumerator<T> source, Type exception,
+        public static async ValueTask AssertFailure<T>(this IAsyncEnumerator<T> source, Type exception,
             params T[] values)
         {
             var idx = 0;

async-enumerable-dotnet/AsyncEnumerableAPI.cs

@@ -2,45 +2,10 @@
 // Licensed under the Apache 2.0 License.
 // See LICENSE file in the project root for full license information.
 
-using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet
 {
-    /// <summary>
-    /// Until C# 8: Dispose a resource or sequence asynchronously in an awaitable fashion.
-    /// </summary>
-    public interface IAsyncDisposable
-    {
-        /// <summary>
-        /// Dispose a resource or sequence asynchronously.
-        /// </summary>
-        /// <returns>The task completed when the dispose action completes.</returns>
-        ValueTask DisposeAsync();
-    }
-
-    /// <summary>
-    /// Until C# 8: Represents an active asynchronous sequence which can be polled for more items.
-    /// </summary>
-    /// <typeparam name="T">The element type of the async sequence.</typeparam>
-    /// <remarks>
-    /// The <see cref="IAsyncDisposable.DisposeAsync"/> should be called exactly once and
-    /// only after an outstanding <see cref="MoveNextAsync"/>'s task completed.
-    /// </remarks>
-    public interface IAsyncEnumerator<out T> : IAsyncDisposable
-    {
-        /// <summary>
-        /// Request the next element from the async sequence.
-        /// </summary>
-        /// <returns>A task that returns true if the next item can be read via
-        /// <see cref="Current"/>, false if there will be no further items.</returns>
-        ValueTask<bool> MoveNextAsync();
-        
-        /// <summary>
-        /// Returns the current item after a successful <see cref="MoveNextAsync"/> call.
-        /// </summary>
-        T Current { get; }
-    }
-
     /// <summary>
     /// Until C# 8: Represents a deferred/lazy asynchronous sequence of values.
     /// </summary>

async-enumerable-dotnet/MulticastAsyncEnumerable.cs

@@ -6,6 +6,7 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet
 {

async-enumerable-dotnet/UnicastAsyncEnumerable.cs

@@ -7,6 +7,7 @@
 using System.Collections.Concurrent;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet
 {

async-enumerable-dotnet/async-enumerable-dotnet.csproj

@@ -23,8 +23,8 @@
   </PropertyGroup>
 
     <ItemGroup>
-        <!-- ... -->
+        <!--
         <PackageReference Include="System.Threading.Tasks.Extensions" Version="4.5.3" Condition="'$(TargetFramework)' == 'netstandard2.0'" />
-        <!-- ... -->
+         -->
     </ItemGroup>
 </Project>

async-enumerable-dotnet/impl/All.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet.impl
 {

async-enumerable-dotnet/impl/Amb.cs

@@ -5,6 +5,7 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet.impl
 {

async-enumerable-dotnet/impl/Any.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet.impl
 {

async-enumerable-dotnet/impl/Collect.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet.impl
 {

async-enumerable-dotnet/impl/CombineLatest.cs

@@ -6,6 +6,7 @@
 using System.Collections.Concurrent;
 using System.Threading;
 using System.Threading.Tasks;
+using System.Collections.Generic;
 
 namespace async_enumerable_dotnet.impl
 {