dmd 2.064.2

[QAston]

On Wednesday, 6 November 2013 at 20:46:23 UTC, Luís Marques wrote:
> 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)

classes have implementations and state you need to initialize. 
It's possible to implement that in wrap but more problematic.