float/double to string (pure nothrow @nogc)

[vit]

On Wednesday, 8 August 2018 at 17:40:11 UTC, ketmar wrote:
> vit wrote:
>
>> Hello, is in phobos some function which convert float/double 
>> to string and is pure @nogc and nothrow?
>
> i don't think that you can make it `pure`, but you certainly 
> can make it `nothrow`, `@nogc` and ctfe-able. it's dangerous to 
> go alone! take this[0].
>
>
> [0] http://repo.or.cz/iv.d.git/blob_plain/HEAD:/ctfefloat.d

thanks, that code can be modified to pure nothrow @nogc @safe.
Is that lib ok? Is little complicated...