Imported Upstream version 1.1.0upstream/1.1.0

1 files changed, 22 insertions, 0 deletions

diff --git a/src/mscorlib/src/System/Runtime/CompilerServices/IsImplicitlyDereferenced.cs b/src/mscorlib/src/System/Runtime/CompilerServices/IsImplicitlyDereferenced.cs
new file mode 100644
index 0000000000..ea81cb8ec5
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/CompilerServices/IsImplicitlyDereferenced.cs
@@ -0,0 +1,22 @@
+// 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.
+
+namespace System.Runtime.CompilerServices
+{
+    // Consider the following C++ method prototypes:
+    // 1) int foo(int ^arg);
+    // 2) int foo(int &arg);
+    //
+    // Both of these methods will have a .NET type signature that looks the
+    // same, but when importing a method from a metadata scope, the compiler 
+    // needs to know what the calling syntax should be.  This modopt and its 
+    // partner "IsExplicitlyDereferenced" disambiguate reference versus
+    // pointer arguments.
+    //
+    // Indicates that the modified GC reference represents a reference in a
+    // method signature.
+    public static class IsImplicitlyDereferenced
+    {
+    }
+}