"else if" for template constraints

[Timon Gehr via Digitalmars-d]

On 08/17/2015 03:18 PM, Steven Schveighoffer wrote:
> Can we do something like this? I'm not a compiler guru, so I defer to
> you experts out there.

Implementation is trivial. (A naive implementation strategy which works 
is to just use the obvious lowering.)