pure format

[Oleg B via Digitalmars-d]

Hello. I not found realization of pure format function (in phobos 
it not pure) and write minimal custom realization.
https://github.com/dexset/desstdx/blob/master/source/des/stdx/pformat.d#L472
Now it works with numbers and strings, but in future I improve it.
Maybe my realization can help someone =)
Contained in the dub package 
http://code.dlang.org/packages/desstdx

If pure format exists tell about it, please.