From b454d454a687d9aa26a382ad16f1a9361b06b074 Mon Sep 17 00:00:00 2001
From: Rolf Bjarne Kvinge <rolf@xamarin.com>
Date: Thu, 20 Apr 2023 13:14:25 +0200
Subject: [PATCH] [Xamarin.MacDev] Move compatibility nullability attributes to
 their own file. (#115)

---
 Xamarin.MacDev/MacCatalystSupport.cs | 11 --------
 Xamarin.MacDev/NullableAttributes.cs | 39 ++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 11 deletions(-)
 create mode 100644 Xamarin.MacDev/NullableAttributes.cs

diff --git a/Xamarin.MacDev/MacCatalystSupport.cs b/Xamarin.MacDev/MacCatalystSupport.cs
index 8aa6d5a..ec14604 100644
--- a/Xamarin.MacDev/MacCatalystSupport.cs
+++ b/Xamarin.MacDev/MacCatalystSupport.cs
@@ -103,14 +103,3 @@ public static bool TryGetiOSVersion (string sdkDirectory, string macOSVersion, [
 		}
 	}
 }
-
-#if !NET
-namespace System.Diagnostics.CodeAnalysis {
-	// from: https://github.com/dotnet/runtime/blob/main/src/libraries/System.Private.CoreLib/src/System/Diagnostics/CodeAnalysis/NullableAttributes.cs
-	[AttributeUsage (AttributeTargets.Parameter, Inherited = false)]
-	internal sealed class NotNullWhenAttribute : Attribute {
-		public NotNullWhenAttribute (bool returnValue) => ReturnValue = returnValue;
-		public bool ReturnValue { get; }
-	}
-}
-#endif // !NET
diff --git a/Xamarin.MacDev/NullableAttributes.cs b/Xamarin.MacDev/NullableAttributes.cs
new file mode 100644
index 0000000..d08fe5d
--- /dev/null
+++ b/Xamarin.MacDev/NullableAttributes.cs
@@ -0,0 +1,39 @@
+//
+// NullableAttributes.cs
+//
+// Author: Rolf Kvinge <rolf@xamarin.com>
+//
+// Copyright (c) 2023 Microsoft Corp.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#nullable enable
+
+using System;
+
+#if !NET
+namespace System.Diagnostics.CodeAnalysis {
+	// from: https://github.com/dotnet/runtime/blob/main/src/libraries/System.Private.CoreLib/src/System/Diagnostics/CodeAnalysis/NullableAttributes.cs
+	[AttributeUsage (AttributeTargets.Parameter, Inherited = false)]
+	internal sealed class NotNullWhenAttribute : Attribute {
+		public NotNullWhenAttribute (bool returnValue) => ReturnValue = returnValue;
+		public bool ReturnValue { get; }
+	}
+}
+#endif // !NET