dmd 2.064.2

["Luís]

Is it possible to build something like wrap, so that it can be 
given a wrapping class instead of a wrapping interface?

I was trying to build something very similar to wrap, and at 
first glance it seems like wrap might suit me, except that I 
wanted to wrap the wolf in the "class Sheep"s clothes, not in an 
ISheep.

(typecons.d(2864): Error: class 
std.typecons.wrap!(B).wrap!(A).Impl base type must be interface, 
not main.B)