Please add [ShaderIgnore] to support managed function in shader code

[JohnMasen]

Description (optional)

Please add [ShaderIgnore] to support managed function in shader code.

1. I want to allow my code load shader code by user options
2. C# does not support constructor method in interface
3. You can define a static method in interface after C# 11.
4. My shader struct with static method implementation causes compile error(ComputeShader tried to compile my static method to HLSL)

Rationale

To support loading shader with a genetic method like LoadShader<T> where T:IComputeShader,IShaderCreator<T>

Proposed API

A new property [ShaderIgnoreProperty] Allows user to mark their code should not be treated as shader code, and skip shader compile. Sample useage:

public interface ICreateWithBuffer<T> where T : unmanaged
{
    static abstract T Create(ReadWriteBuffer<T> data); 
}

[ThreadGroupSize(DefaultThreadGroupSizes.X)]
[GeneratedComputeShaderDescriptor]
public readonly partial struct myShader(ReadWriteBuffer<int> data) : IComputeShader, ICreateWithBuffer<int>
{
    [ShaderIgnore]
    public static int Create(ReadWriteBuffer<int> data)
    {
        return new myShader(data);
    }

    public void Execute()
    {
        var d = data[ThreadIds.X];
    }
}

Drawbacks

NA

Alternatives

NA

Other thoughts

NA

[Sergio0694]

You can already do this, it's the same scenario that was fixed by #252. Just implement that Create method explicitly and the source generator will ignore it and not produce errors for it 🙂