Patch for LWG issue 2275 - forward_as_tuple should be constexpr

[Howard Hinnant]

On Sep 28, 2013, at 2:12 PM, Marshall Clow <mclow.lists at gmail.com> wrote:

> This is an easy one; we already had a "__forward_as_tuple" that was constexpr that did the same thing as "forward_as_tuple"
> Remove the __ one, make sure that the remaining one is constexpr, and add a test to be sure.
> 
> -- Marshall
> 
> Marshall Clow     Idio Software   <mailto:mclow.lists at gmail.com>
> 
> A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait).
>        -- Yu Suzuki
> 
> <ish2275.patch>

Thanks, please commit.

Howard