Add polyfill for OverloadResolutionPriorityAttribute (#19)

Author: Tyrrrz

PolyShim.Tests/Net90/OverloadResolutionPriorityAttributeTests.cs

@@ -0,0 +1,20 @@
+using System.Runtime.CompilerServices;
+using FluentAssertions;
+using Xunit;
+
+namespace PolyShim.Tests.Net90;
+
+public class OverloadResolutionPriorityAttributeTests
+{
+    [OverloadResolutionPriority(1)]
+    private int Foo(int value = 0) => value;
+
+    private int Foo() => 42;
+
+    [Fact]
+    public void Initialization_Test()
+    {
+        // Act & assert
+        Foo().Should().Be(0);
+    }
+}

PolyShim/Net90/OverloadResolutionPriorityAttribute.cs

@@ -0,0 +1,28 @@
+// The following comment is required to instruct analyzers to skip this file
+// <auto-generated/>
+
+#if (NETCOREAPP && !NET9_0_OR_GREATER) || (NETFRAMEWORK) || (NETSTANDARD)
+#nullable enable
+#pragma warning disable CS9216
+// ReSharper disable RedundantUsingDirective
+// ReSharper disable CheckNamespace
+// ReSharper disable InconsistentNaming
+// ReSharper disable PartialTypeWithSinglePart
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace System.Runtime.CompilerServices;
+
+// https://learn.microsoft.com/en-us/dotnet/api/system.runtime.compilerservices.overloadresolutionpriorityattribute
+[ExcludeFromCodeCoverage]
+[AttributeUsage(
+    AttributeTargets.Constructor
+        | AttributeTargets.Method
+        | AttributeTargets.Property,
+    Inherited = false
+)]
+internal class OverloadResolutionPriorityAttribute(int priority) : Attribute
+{
+    public int Priority { get; } = priority;
+}
+#endif

Readme.md

@@ -45,6 +45,7 @@ To learn more about the war and how you can help, [click here](https://tyrrrz.me
   - Required properties
   - Named tuples
   - Module initializers
+  - Overload priority
   - & more...
 - Provides type polyfills for:
   - `ValueTuple<...>`