Vote for the new std.hash (oops, std.digest)

[Johannes Pfau]

Am Thu, 23 Aug 2012 22:46:35 +0200
schrieb Jens Mueller <jens.k.mueller at gmx.de>:

> 
> It says "Digests do not work in CTFE".
> Just checked it for MD5.
> I do not know but I think this is just a current limitation of the
> CTFE implementation.

It's possible to support CTFE, Piotr Szturmaj has some digests which
work in CTFE. But it's difficult as everything which depends on
endianness isn't supported in CTFE.

https://github.com/pszturmaj/phobos/commit/d06c258b442c5b59ab3a66125c9aea8a4c00a0b7

take for example the setByte function:
a[offset / E.sizeof] |= value << ((offset % E.sizeof) * 8);
This is necessary because you can't cast from uint to ubyte[4] in CTFE.