templatized delegate

[Alex via Digitalmars-d-learn]

On Tuesday, 23 May 2017 at 16:38:14 UTC, Stanislav Blinov wrote:
> Ah, now I think I get it. You want to store a single delegate 
> that could be called with different sets of arguments? No, you 
> can't do that: you need an actual delegate instance, and for 
> that, you need to know the signature, at least when 
> instantiating C.

Yes :)
or, just to differentiate between the used and unused parameters, 
without loosing their types and attributes.
But that's a minor problem, the solution with full signature

https://forum.dlang.org/post/ekbpjsuyqprusyasmjsm@forum.dlang.org#post-svvgcrymplmyondhuogt:40forum.dlang.org

works also well, as the effort to name everything is not so big 
in my case...