Mixin annotations options

NCop allows any combination of MixinsAttribute attribute annotation as long as each implemented interface of the composite has a mixin implementation.

• Annotating the composite

public interface IDeveloper
{
    void Code();
}

public interface IMusician
{
    void Play();
}

public class GuitarPlayerMixin : IMusician
{
    public void Play() {
        Console.WriteLine("Playing C# accord with Fender Telecaster");
    }
}

public class CSharpDeveloperMixin : IDeveloper
{
    public void Code() {
        Console.WriteLine("C# coding");
    }
}

[TransientComposite]
[Mixins(typeof(CSharpDeveloperMixin), typeof(GuitarPlayerMixin))]
public interface IPerson : IDeveloper, IMusician
{
}

• Annotating the interfaces

[Mixins(typeof(CSharpDeveloperMixin))]
public interface IDeveloper
{
    void Code();


[Mixins(typeof(GuitarPlayerMixin))]
public interface IMusician
{
    void Play();
}

public class GuitarPlayerMixin : IMusician
{
    public void Play() {
        Console.WriteLine("Playing C# accord with Fender Telecaster");
    }
}

public class CSharpDeveloperMixin : IDeveloper
{
    public void Code() {
        Console.WriteLine("C# coding");
    }
}

[TransientComposite]
public interface IPerson : IDeveloper, IMusician
{
}

• Splitting the annotations

[Mixins(typeof(CSharpDeveloperMixin))]
public interface IDeveloper
{
    void Code();
}

public interface IMusician
{
    void Play();
}

public class GuitarPlayerMixin : IMusician
{
    public void Play() {
        Console.WriteLine("Playing C# accord with Fender Telecaster");
    }
}

public class CSharpDeveloperMixin : IDeveloper
{
    public void Code() {
        Console.WriteLine("C# coding");
    }
}

[TransientComposite]
[Mixins(typeof(GuitarPlayerMixin))]
public interface IPerson : IDeveloper, IMusician
{
}