[libcxx] r238848 - Implement the first part of N4258 - allocator_traits<X>::is_always_equal. Also fixes PR#23723

[Tim Northover]

Hi Marshall,

On 2 June 2015 at 09:34, Marshall Clow <mclow.lists at gmail.com> wrote:
> Implement the first part of N4258 - allocator_traits<X>::is_always_equal. Also fixes PR#23723

It looks like this commit caused some libcxx fallout on OS X. For
example this Green Dragon log:

http://lab.llvm.org:8080/green/job/libcxx-built_lib-system_host/279/

Could you take a look?

Cheers.

Tim.