[v3] plus<void>

[Paolo Carlini]

On 9/24/13 5:37 PM, Marc Glisse wrote:
> Hello,
>
> this was only minimally tested since trunk is broken at the moment. 
> There don't seem to be specific tests for the existing functors, so a 
> couple tests for the new specializations seem good enough.
What about at least covering all of them? Just to make sure that 
instantiating the member template operators works, at definition time 
the front-end doesn't check much.

Paolo.