get parameter names

[Biotronic via Digitalmars-d-learn]

On Friday, 1 September 2017 at 20:58:20 UTC, EntangledQuanta 
wrote:
>
> template(A, B...)
> {
>    auto foo(C...)(C c)
>    {
>        ... get c's parameter names, should be alpha, beta
>    }
> }
>
>
> foo!(., .)(alpha, beta)
>
> I need the actual identifiers passed to foo. I can get the 
> types(obviously C) but when I try to get the identifier 
> names(__traits(identifier or other methods) I stuff get 
> _param_k or errors.
>
> I need both C's types and the parameter identifier names past, 
> else I'd just pass as strings.

Like Jonathan M Davis points out, this is impossible for regular 
parameters. For template alias parameters, on the other hand, 
this works:

void bar(alias fn)() {
     assert(fn.stringof == "alpha");
}

unittest {
     int alpha;
     bar!(alpha);
}

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