https://issues.dlang.org/show_bug.cgi?id=12891
--- Comment #8 from Jonathan Dunlap <jad...@gmail.com> --- Thanks Martin for the gist sample, I've started to integrate in this branch: https://github.com/jadbox/druntime/tree/fetchmod Currently I'm having an issue where a static if check against __traits(isSame,T,V1) is always resulting to false, even though it seems T and V1 are the same in the unittests. --