Added CallerArgumentExpressionAttribute (corefx issue 21809) (#18404)

* Added CallerArgumentExpressionAttribute

* Modified CallerAtgumentExpressionAttribute

Removed ArgumentNull check from constructor and reordered members to
be more consistent with other attribute classes.

diff --git a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
index fcf4e53102e31fa79971d9c68e11a5c49526c8cd..cd358d1b4122e75204c3bdaea9ef1ae3f46e3a5c 100644 (file)
--- a/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
+++ b/src/System.Private.CoreLib/shared/System.Private.CoreLib.Shared.projitems
@@ -403,6 +403,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\AsyncMethodBuilderAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\AsyncStateMachineAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\AsyncValueTaskMethodBuilder.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\CallerArgumentExpressionAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\CallerFilePathAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\CallerLineNumberAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Runtime\CompilerServices\CallerMemberNameAttribute.cs" />

diff --git a/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/CallerArgumentExpressionAttribute.cs b/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/CallerArgumentExpressionAttribute.cs
new file mode 100644 (file)
index 0000000..6e1c4c5
--- /dev/null
+++ b/src/System.Private.CoreLib/shared/System/Runtime/CompilerServices/CallerArgumentExpressionAttribute.cs
@@ -0,0 +1,17 @@
+// 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
+{
+    [AttributeUsage(AttributeTargets.Parameter, AllowMultiple = false, Inherited = false)]
+    public sealed class CallerArgumentExpressionAttribute : Attribute
+    {
+        public CallerArgumentExpressionAttribute(string parameterName)
+        {
+            ParameterName = parameterName;
+        }
+
+        public string ParameterName { get; }
+    }
+}