Index a parameter tuple with a run-time index

[Meta via Digitalmars-d-learn]

On Friday, 15 January 2016 at 21:47:21 UTC, Justin Whear wrote:
> On Fri, 15 Jan 2016 20:52:46 +0000, Meta wrote:
>
>> And of course I'm proven wrong as soon as I post :) Sometimes 
>> I forget how powerful D's  code generation abilities are.
>
> Username doesn't check out, :(

Huh?