How do I pass a template type as parameter?

[Machine Code]

On Tuesday, 16 April 2019 at 21:24:54 UTC, Adam D. Ruppe wrote:
> On Tuesday, 16 April 2019 at 21:07:51 UTC, Machine Code wrote:
>> void f(appender!string buffer) { }
>
> appender isn't a type, it is a helper function that returns a 
> type called Appender:
>
> http://dpldocs.info/experimental-docs/std.array.appender.1.html
>
> http://dpldocs.info/experimental-docs/std.array.Appender.html
>
>
>
> So try like `void f(Appender!string buffer) {}`

I see. Thank you!