2012-11-01 François Dumont <fdumont@gcc.gnu.org>
* include/bits/hashtable_policy.h (__details::_Before_begin<>):
New, combine a base node instance and an allocator.
* include/bits/hashtable.h (_Hashtable<>::_M_node_allocator): Remove.
(_Hashtable<>::_M_before_begin): Rename into _M_bbegin and type
modified to __detail::_Before_begin<>.
(_Hashtable<>::_M_node_allocator()): New, get the node allocator
part of _M_bbegin.
(_Hashtable<>::_M_before_begin()): New, get the before begin node
part of _M_bbegin.
(_Hashtable<>): Adapt to use latter.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@193068 138bc75d-0d04-0410-961f-82ee72b054a4