How can I test at compile time whether T is an instance of an interface ?

[wjoe]

On Wednesday, 23 September 2020 at 18:50:28 UTC, H. S. Teoh wrote:
> Try this:
>
> 	interface I {}
> 	class C : I {}
> 	class D {}
> 	struct S {}
>
> 	pragma(msg, is(C : I));	// true
> 	pragma(msg, is(D : I));	// false
> 	pragma(msg, is(S : I));	// false
>
> So probably what you want is something like this:
>
> 	void register(C, ARGS...)(ARGS args)
> 		if (behavesLikeFoo!C || is(C : IFoo))
> 		...
>
>
> T

Yes, that's it. Thanks :)