Two part question. Making a dynamic array of delegates, and taking in a delegate with unknown parameters as an argument .

[Nicholas Wilson via Digitalmars-d-learn]

On Thursday, 1 December 2016 at 23:51:19 UTC, Payotz wrote:
> So, to give context, I am trying to make an event manager for a 
> game I'm making.
> I was writing the "register()" method so I ran into a problem.
>
> The register method will take in delegates as an argument, but 
> those delegates have varied arguments themselves, so I can't 
> really put anything there. I know that it's got something to do 
> with templates so I tried my hand in it and came up with this:
>
> void registerEvent(string event_name,T...)(T delegate() dg);
>

You could do what pthread does in C to achieve similar goals.

     void delegate(void*); // or int delegate(void*) if you want 
to return an error code
     and then store the void pointer along with the delegate
and then cast the void* to the correct type (a struct of 
arguments or similar) and call it later. not very safe but there 
are ways to make it nicer.

However if the set of types of events is closed you can use

     ailas event = Algebraic!(ev1,ev2,ev3...);

where ev1 and so on are structs that hold parameters of the event.
and have

     void delegate(event);

This is effectively how SDL does events.

> I know there's something missing in the way I did it, so I'll 
> be glad for you folks to tell me what I'm missing.
>
> And for the second part of the question, I can't seem to make a 
> Dynamic Array where I could store the delegates taken in the 
> "registerEvent" method. Closest thing I have gotten to is this:
>
> private void delegate(T)(T args)[string] event;
>
> which resulted in the compiler screaming Error signs at me.
> So how does one do it?

You get an error here because you are trying to have an 
associative array of templates. if they were all void 
delegate(int)'s that would work. You can't use an uninstantiated 
template as a type.