delegate bug?

[Jack Applegame]

> Because this is a learning group and not a teaching group--and 
> you did
> not report on your fruitless tries: go on.
>
> -manfred
This is not only std::function feature. In C++ we can call 
member-function by combining potinter to object and pointer to 
function:

http://liveworkspace.org/code/1fe3107cf3a311aa95cb9fc62b9117a7

I have no idea how to do somethink like that in D.