Add VirtualStaticsInInterfaces flag to RuntimeFeature (#52733)

* Add RuntimeFeature indicating support for static virtual methods in the runtime * Mark it with the preview flag
dotnet · May 14, 2021 · 1e48704 · 1e48704
1 parent 88211b9
commit 1e48704
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Showing 2 changed files with 11 additions and 0 deletions.
diff --git a/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeFeature.cs b/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeFeature.cs
@@ -1,6 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Runtime.Versioning;
+
 namespace System.Runtime.CompilerServices
 {
     public static partial class RuntimeFeature
@@ -25,6 +27,12 @@ public static partial class RuntimeFeature
         /// </summary>
         public const string CovariantReturnsOfClasses = nameof(CovariantReturnsOfClasses);
 
+        /// <summary>
+        /// Indicates that this version of runtime supports virtual static members of interfaces.
+        /// </summary>
+        [RequiresPreviewFeatures]
+        public const string VirtualStaticsInInterfaces = nameof(VirtualStaticsInInterfaces);
+
         /// <summary>
         /// Checks whether a certain feature is supported by the Runtime.
         /// </summary>
@@ -36,6 +44,7 @@ public static bool IsSupported(string feature)
                 case CovariantReturnsOfClasses:
                 case UnmanagedSignatureCallingConvention:
                 case DefaultImplementationsOfInterfaces:
+                case VirtualStaticsInInterfaces:
                     return true;
                 case nameof(IsDynamicCodeSupported):
                     return IsDynamicCodeSupported;

diff --git a/src/libraries/System.Runtime/ref/System.Runtime.cs b/src/libraries/System.Runtime/ref/System.Runtime.cs
@@ -9770,6 +9770,8 @@ public static partial class RuntimeFeature
         public const string DefaultImplementationsOfInterfaces = "DefaultImplementationsOfInterfaces";
         public const string UnmanagedSignatureCallingConvention = "UnmanagedSignatureCallingConvention";
         public const string PortablePdb = "PortablePdb";
+        [System.Runtime.Versioning.RequiresPreviewFeaturesAttribute]
+        public const string VirtualStaticsInInterfaces = "VirtualStaticsInInterfaces";
         public static bool IsDynamicCodeCompiled { get { throw null; } }
         public static bool IsDynamicCodeSupported { get { throw null; } }
         public static bool IsSupported(string feature) { throw null; }