Type literal of pure function pointer

[bearophile]

Simen kjaeraas:
> Add it to Bugzilla. Another case is that this works:
> 
> alias pure int function( int ) FN;
> pure foo4( FN fn, int x ) {
>      return fn( x );
> }
> 
> It seems the problem is that type specification in function signatures
> does not support the full range of type signature in the language.

http://d.puremagic.com/issues/show_bug.cgi?id=4505