between and among: worth Phobosization?

[Chris Cain]

On Tuesday, 17 December 2013 at 22:23:47 UTC, H. S. Teoh wrote:
> In my previous post I considered allowing non-homogenous 
> upper/lower
> bound types, but in interest of keeping things less messy, it 
> may be
> better to just allow only a single type (then you wouldn't need 
> kooky
> static-if's around things like opApply, etc.).

I disagree. The fact that it is so messy is precisely why it 
needs to handle it. Doing the messy/hard things in the standard 
library means that users don't have to do it. It's even more 
important since it's so error prone and the "obvious" way to do 
it is strictly wrong.