unordered containers emplace

[Paolo Carlini]

On 12/08/2011 10:14 PM, François Dumont wrote:
> So here is the new proposition with additional tests experimenting 
> emplace insertion using piecewise_construct.
>
> 2011-12-08  François Dumont <fdumont@gcc.gnu.org>
>
>         * include/bits/hashtable.h (_Hashtable<>::emplace,
>         _Hashtable<>::emplace_hint): Add.
>         * include/debug/unordered_set (unordered_set<>::emplace,
>         unordered_set<>::emplace_hint, unordered_multiset<>::emplace,
>         unordered_multiset<>::emplace_hint): Add.
>         * include/debug/unordered_map (unordered_map<>::emplace,
>         unordered_map<>::emplace_hint, unordered_multimap<>::emplace,
>         unordered_multimap<>::emplace_hint): Add.
>         * testsuite/23_containers/unordered_map/modifiers/emplace.cc: 
> New.
>         * 
> testsuite/23_containers/unordered_multimap/modifiers/emplace.cc:
>         New.
>         * testsuite/23_containers/unordered_set/modifiers/emplace.cc: 
> New.
>         * 
> testsuite/23_containers/unordered_multiset/modifiers/emplace.cc:
>         New.
>         * testsuite/util/testsuite_container_traits.h
>         (traits_base::has_emplace): Add and defined as std::true_type for
>         unordered containers.
>         * testsuite/util/exception/safety.h (emplace, emplace_hint): 
> Add and
>         use them in basic_safety exception test case.
>         * doc/xml/manual/status_cxx2011.xml: Update unordered containers
>         status.
>
> Tested under linux x86_64 normal and debug mode.
>
> I haven't touch to profile mode for the moment even if I noticed that 
> this mode is broken since recent hashtable modifications. I will 
> submit an other patch for that.
Please. Should be rather simple, anyway.
> Ok to commit ?
Sure, thanks!

Paolo.