Implement full support for non-pointer pointers in custom allocators for deque.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@184673 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo in assertion message.  Reported by Shriramana Sharma.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@184691 91177308-0d34-0410-b5e6-96231b3b80d8
Implement full support for non-pointer pointers in custom allocators for forward_list.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@184759 91177308-0d34-0410-b5e6-96231b3b80d8