Extend the call site default argument expansion mechanism?

[Yuxuan Shui]

On Thursday, 10 May 2018 at 14:17:50 UTC, rikki cattermole wrote:
> On 11/05/2018 2:15 AM, Yuxuan Shui wrote:
>> [...]
>
> Bad idea, too much magic.

This magic is already there in D. I just want to use it in a 
different way.