YesOrNo: useful idiom helper or wanking?

[Andrej Mitrovic]

On 4/11/11, Andrei Alexandrescu <SeeWebsiteForEmail at erdani.org> wrote:
> template YesOrNo(string name)
> {
>      mixin("enum "~name~" : bool { no, yes }");
> }
>
> void someFunction(YesOrNo!"SomeOption") { }

How exactly would this work? I can't compile it.