is there a reason declarative style if are allowed, but not while ?

[RazvanN]

On Monday, 1 March 2021 at 15:20:10 UTC, deadalnix wrote:
> On Sunday, 28 February 2021 at 14:32:32 UTC, Timon Gehr wrote:
>> I don't think there's any good reason.
>>
>> Related: https://issues.dlang.org/show_bug.cgi?id=16140
>>
>> FWIW, note that this works in C++.
>
> Is there a way to expedite this? This seems like an obvious 
> improvement.

PR: https://github.com/dlang/dmd/pull/12246