From 20cd393c1e577f0ff53cdc3a00edc3bcfc68ab7f Mon Sep 17 00:00:00 2001
From: Tanner Gooding <tagoo@outlook.com>
Date: Fri, 13 May 2022 14:52:07 -0700
Subject: [PATCH] Expose the RuntimeFeature.NumericIntPtr member for C# 11
 (#69322)

---
 .../src/System/Runtime/CompilerServices/RuntimeFeature.cs   | 6 ++++++
 src/libraries/System.Runtime/ref/System.Runtime.cs          | 1 +
 2 files changed, 7 insertions(+)

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
index 0c16cd1315a4..e69436494251 100644
--- a/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeFeature.cs
+++ b/src/libraries/System.Private.CoreLib/src/System/Runtime/CompilerServices/RuntimeFeature.cs
@@ -37,6 +37,11 @@ public static partial class RuntimeFeature
         /// </summary>
         public const string VirtualStaticsInInterfaces = nameof(VirtualStaticsInInterfaces);
 
+        /// <summary>
+        /// Indicates that this version of runtime supports <see cref="System.IntPtr" /> and <see cref="System.UIntPtr" /> as numeric types.
+        /// </summary>
+        public const string NumericIntPtr = nameof(NumericIntPtr);
+
         /// <summary>
         /// Checks whether a certain feature is supported by the Runtime.
         /// </summary>
@@ -50,6 +55,7 @@ public static bool IsSupported(string feature)
                 case UnmanagedSignatureCallingConvention:
                 case DefaultImplementationsOfInterfaces:
                 case VirtualStaticsInInterfaces:
+                case NumericIntPtr:
                     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
index feb44b077a59..0bc858163871 100644
--- a/src/libraries/System.Runtime/ref/System.Runtime.cs
+++ b/src/libraries/System.Runtime/ref/System.Runtime.cs
@@ -11817,6 +11817,7 @@ public static partial class RuntimeFeature
         public const string ByRefFields = "ByRefFields";
         public const string CovariantReturnsOfClasses = "CovariantReturnsOfClasses";
         public const string DefaultImplementationsOfInterfaces = "DefaultImplementationsOfInterfaces";
+        public const string NumericIntPtr = "NumericIntPtr";
         public const string PortablePdb = "PortablePdb";
         public const string UnmanagedSignatureCallingConvention = "UnmanagedSignatureCallingConvention";
         public const string VirtualStaticsInInterfaces = "VirtualStaticsInInterfaces";