Optional type parameter on a template

[Luis]

On Tuesday, 12 May 2020 at 20:40:35 UTC, Adam D. Ruppe wrote:
> A default argument of void is a common way to do it
>
> template foo(T = void) {
>    static if(is(T == void)) { not given } else { use T }
> }
>


Perfect! Works as I desired.