31 lines
907 B
C#
31 lines
907 B
C#
// Licensed to the .NET Foundation under one or more agreements.
|
|
// The .NET Foundation licenses this file to you under the MIT License.
|
|
// See the LICENSE file in the project root for more information.
|
|
|
|
using System.Reactive.PlatformServices;
|
|
|
|
namespace System.Reactive.Linq
|
|
{
|
|
internal static class QueryServices
|
|
{
|
|
private static readonly IQueryServices Services = Initialize();
|
|
|
|
public static T GetQueryImpl<T>(T defaultInstance) => Services.Extend(defaultInstance);
|
|
|
|
private static IQueryServices Initialize()
|
|
{
|
|
return PlatformEnlightenmentProvider.Current.GetService<IQueryServices>() ?? new DefaultQueryServices();
|
|
}
|
|
}
|
|
|
|
internal interface IQueryServices
|
|
{
|
|
T Extend<T>(T baseImpl);
|
|
}
|
|
|
|
internal sealed class DefaultQueryServices : IQueryServices
|
|
{
|
|
public T Extend<T>(T baseImpl) => baseImpl;
|
|
}
|
|
}
|