Extend the call site default argument expansion mechanism?

[jmh530]

On Tuesday, 15 May 2018 at 14:26:48 UTC, Yuxuan Shui wrote:
>> [snip]
>> Example:
>> https://run.dlang.io/is/RV2xIH
>
> Sadly with(WithAlloc!alloc) doesn't work. (If you have to use 
> withAlloc.func everywhere, it kind of destroy the point, 
> doesn't it?)

Yeah I know, I tried it, but couldn't figure out how to do the 
with statement with it.