Optimize hashtable allocator

[Paolo Carlini]

Hi,

On 11/01/2012 10:03 PM, François Dumont wrote:
> Attached patch applied.
>
> 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.
guys, is it possible that some prettyprinting tests are failing again 
because of this change?

FAIL: libstdc++-prettyprinters/cxx11.cc print uom
FAIL: libstdc++-prettyprinters/cxx11.cc print uomm
FAIL: libstdc++-prettyprinters/cxx11.cc print uos
FAIL: libstdc++-prettyprinters/cxx11.cc print uoms

Sorry for bothering ;)

Paolo.