delegate with optional parameters

[Basile B. via Digitalmars-d-learn]

On Sunday, 2 April 2017 at 19:24:14 UTC, Inquie wrote:
> is it possible to create a delegate that takes an optional 
> number of parameters and/or return type?
>
> T delegate(S...)(S) special_delegate;
>
> I guess this is impossible?

alias Dg(Return, Params...) = Return delegate(Params);

Dg!(int,float, string) myDg;