Implement LWG#680, which was missed lo these many moons ago, and was reported as bug #27259. As a drive-by fix, replace the hand-rolled equivalent to addressof in __wrap_iter with the real thing.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@265914 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed