I would think that the new generic selection macro capability in C11 would help here: http://www.robertgamble.net/2012/01/c11-generic-selections.html I have

I would think that the new generic selection macro capability in C11 would help here: http://www.robertgamble.net/2012/01/c11-generic-selections.html I haven't taken the time to prototype an implementation, but it seems like at least some cases could be solved.