[PATCH] D20014: [libc++] Explicit return in non-void function

[Marshall Clow via cfe-commits]

mclow.lists added a subscriber: mclow.lists.
mclow.lists accepted this revision.
mclow.lists added a reviewer: mclow.lists.
mclow.lists added a comment.
This revision is now accepted and ready to land.

LGTM.

`C` and `D` are different failure modes for `uses_allocator`, since the standard says that it has to be a nested type.


http://reviews.llvm.org/D20014