From 6c33d128c23a090f4a6cf46ce816b71b81b87506 Mon Sep 17 00:00:00 2001
From: Jonas Nyrup <jnyrup@gmail.com>
Date: Sun, 30 Oct 2022 22:22:01 +0100
Subject: [PATCH] Use PolySharp to generate polyfill attributes

---
 Build/Build.cs                                |  4 +-
 .../DoesNotReturnAttribute.cs                 | 17 -------
 Src/FluentAssertions/FluentAssertions.csproj  |  1 +
 Src/FluentAssertions/StringSyntaxAttribute.cs | 50 -------------------
 4 files changed, 2 insertions(+), 70 deletions(-)
 delete mode 100644 Src/FluentAssertions/DoesNotReturnAttribute.cs
 delete mode 100644 Src/FluentAssertions/StringSyntaxAttribute.cs

diff --git a/Build/Build.cs b/Build/Build.cs
index 12420110fd..7c2fb7b539 100644
--- a/Build/Build.cs
+++ b/Build/Build.cs
@@ -168,9 +168,7 @@ class Build : NukeBuild
                 .SetTargetDirectory(TestResultsDirectory / "reports")
                 .AddReports(TestResultsDirectory / "**/coverage.cobertura.xml")
                 .AddReportTypes("HtmlInline_AzurePipelines_Dark", "lcov")
-                .SetClassFilters(
-                    "-System.Diagnostics.CodeAnalysis.StringSyntaxAttribute",
-                    "-System.Diagnostics.CodeAnalysis.DoesNotReturnAttribute")
+                .AddFileFilters("-*.g.cs")
                 .SetAssemblyFilters("+FluentAssertions"));
 
             string link = TestResultsDirectory / "reports" / "index.html";
diff --git a/Src/FluentAssertions/DoesNotReturnAttribute.cs b/Src/FluentAssertions/DoesNotReturnAttribute.cs
deleted file mode 100644
index 9a5d558f29..0000000000
--- a/Src/FluentAssertions/DoesNotReturnAttribute.cs
+++ /dev/null
@@ -1,17 +0,0 @@
-// copied from https://source.dot.net/#System.Private.CoreLib/NullableAttributes.cs
-#if !(NETSTANDARD2_1_OR_GREATER || NETCOREAPP3_0_OR_GREATER)
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-namespace System.Diagnostics.CodeAnalysis;
-
-/// <summary>Applied to a method that will never return under any circumstance.</summary>
-[AttributeUsage(AttributeTargets.Method, Inherited = false)]
-#if SYSTEM_PRIVATE_CORELIB
-public
-#else
-internal
-#endif
-    sealed class DoesNotReturnAttribute : Attribute
-{
-}
-#endif
diff --git a/Src/FluentAssertions/FluentAssertions.csproj b/Src/FluentAssertions/FluentAssertions.csproj
index f1afb9908f..3d22813eb0 100644
--- a/Src/FluentAssertions/FluentAssertions.csproj
+++ b/Src/FluentAssertions/FluentAssertions.csproj
@@ -55,6 +55,7 @@
   <ItemGroup>
     <PackageReference Include="JetBrains.Annotations" Version="2022.1.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
+    <PackageReference Include="PolySharp" Version="1.7.1" PrivateAssets="all" />
     <None Include="..\FluentAssertions.png" Pack="true" Visible="false" PackagePath="" />
   </ItemGroup>
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">
diff --git a/Src/FluentAssertions/StringSyntaxAttribute.cs b/Src/FluentAssertions/StringSyntaxAttribute.cs
deleted file mode 100644
index 8253978af5..0000000000
--- a/Src/FluentAssertions/StringSyntaxAttribute.cs
+++ /dev/null
@@ -1,50 +0,0 @@
-// copied from https://raw.githubusercontent.com/dotnet/runtime/main/src/libraries/System.Private.CoreLib/src/System/Diagnostics/CodeAnalysis/StringSyntaxAttribute.cs
-#if !NET7_0_OR_GREATER
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-#nullable enable
-
-namespace System.Diagnostics.CodeAnalysis;
-
-/// <summary>Specifies the syntax used in a string.</summary>
-[AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
-#if SYSTEM_PRIVATE_CORELIB
-public
-#else
-internal
-#endif
-sealed class StringSyntaxAttribute : Attribute
-{
-    /// <summary>Initializes the <see cref="StringSyntaxAttribute"/> with the identifier of the syntax used.</summary>
-    /// <param name="syntax">The syntax identifier.</param>
-    public StringSyntaxAttribute(string syntax)
-    {
-        Syntax = syntax;
-        Arguments = Array.Empty<object?>();
-    }
-
-    /// <summary>Initializes the <see cref="StringSyntaxAttribute"/> with the identifier of the syntax used.</summary>
-    /// <param name="syntax">The syntax identifier.</param>
-    /// <param name="arguments">Optional arguments associated with the specific syntax employed.</param>
-    public StringSyntaxAttribute(string syntax, params object?[] arguments)
-    {
-        Syntax = syntax;
-        Arguments = arguments;
-    }
-
-    /// <summary>Gets the identifier of the syntax used.</summary>
-    public string Syntax { get; }
-
-    /// <summary>Optional arguments associated with the specific syntax employed.</summary>
-    public object?[] Arguments { get; }
-
-    /// <summary>The syntax identifier for strings containing date and time format specifiers.</summary>
-    public const string DateTimeFormat = nameof(DateTimeFormat);
-
-    /// <summary>The syntax identifier for strings containing JavaScript Object Notation (JSON).</summary>
-    public const string Json = nameof(Json);
-
-    /// <summary>The syntax identifier for strings containing regular expressions.</summary>
-    public const string Regex = nameof(Regex);
-}
-#endif