Using platform analyzer for arbitrary features

FeatureCheck.cs

using System.Diagnostics;

class Program {
    public static void Main() {
        if (Avx2.IsSupported) {
            Avx2.Use(); // No warning. :)
        } else {
            // fallback logic...
        }
    }

    public static void Bad() {
        Avx2.Use(); // Warns!
    }

    public static void BadAssert() {
        Debug.Assert(Avx2.IsSupported);
        Avx2.Use(); // No warning... we need to be careful with debug asserts. :(
    }
}

[RequiresFeature("Avx2.0")]
public class Avx2 {
    [FeatureCheck("Avx2.0")]
    public static bool IsSupported => true;

    public static void Use() {}
}

FeatureCheck.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

  <ItemGroup>
    <Using Include="System.Runtime.Versioning.SupportedOSPlatformAttribute" Alias="RequiresFeatureAttribute" />
    <Using Include="System.Runtime.Versioning.SupportedOSPlatformGuardAttribute" Alias="FeatureCheckAttribute" />
    <SupportedPlatform Include="Avx" />
  </ItemGroup>

</Project>