Replacement for snprintf

[berni44]

On Saturday, 14 December 2019 at 08:44:21 UTC, berni44 wrote:
> Update: While this first PR is still waiting for being revied, 
> a second PR (the same for '%a' qualifier) has been merged last 
> week. Today I filed a third PR (for '%e' qualifier).
>
> The '%g' qualifier has to wait until these two PRs are merged, 
> because it depends strongly on those two. With the help of 
> Petar Kirov [ZombineDev] I meanwhile also managed to make the 
> whole CTFEable. But this also has to wait for the two PRs 
> mentioned above.

I'm still waiting for a review... The algorithm isn't really 
complicated. It's essentially successive division/multiplication 
by 10. Unfortunately with numbers larger than ulong and there is 
all the stuff with the flags, precision and width... But should 
be doable anyway, IMHO.

* https://github.com/dlang/phobos/pull/7264
* https://github.com/dlang/phobos/pull/7318