delegate bug?

[Manfred Nowak]

Jack Applegame wrote:

> Ok. Then how to implement in D this С++ std::function feature?
> 
> http://liveworkspace.org/code/01aa058901529f65cb9a3cc4ba605248

That feature is among others defined here: 
http://en.cppreference.com/w/cpp/utility/functional/function

As one might see it is a template, defined in a library.

Therefore the first question is, wether D has a similar template in a 
library---and secondly: without such a template in a library: how to 
implement the base functionality in a non-generic case.

Because this is a learning group and not a teaching group--and you did 
not report on your fruitless tries: go on.

-manfred