PR 44436 Associative containers emplace/emplace_hint

[François Dumont]

Hi

     Here is a patch to add emplace/emplace_hint on associative 
containers in C++11 mode.

     I did some refactoring to use as much of the same code between 
insert and emplace methods..

     I have also change map::operator[] to now use the emplace logic in 
C++11 so that we only need the value type to be default constructible.

     The C++11 status table was not signaling that those methods were 
missing so I didn't had to update it.

2012-09-14  François Dumont  <fdumont@gcc.gnu.org>

     PR libstdc++/44436
     * include/bits/stl_tree.h
     (_Rb_tree<>::_M_insert_): Take _Base_ptr rather than
     _Const_Base_ptr.
     (_Rb_tree<>::_M_insert_node): New.
     (_Rb_tree<>::_M_get_insert_unique_pos): New, search code of
     _M_insert_unique method.
     (_Rb_tree<>::_M_insert_unique): Use latter.
     (_Rb_tree<>::_M_emplace_unique): New, likewise.
     (_Rb_tree<>::_M_get_insert_equal_pos): New, search code of
     _M_insert_equal method.
     (_Rb_tree<>::_M_insert_equal): Use latter.
     (_Rb_tree<>::_M_emplace_equal): New, likewise.
     (_Rb_tree<>::_M_get_insert_hint_unique_pos): New, search code of
     _M_insert_unique_ method.
     (_Rb_tree<>::_M_insert_unique_): Use latter.
     (_Rb_tree<>::_M_emplace_hint_unique): New, likewise.
     (_Rb_tree<>::_M_get_insert_hint_equal_pos): New, search code of
     _M_insert_equal_ method.
     (_Rb_tree<>::_M_insert_equal_): Use latter.
     (_Rb_tree<>::_M_emplace_hint_equal): New, likewise.
     (_Rb_tree<>::_M_insert_lower): Remove first _Base_ptr parameter,
     useless as always null.
     * include/bits/stl_map.h: Include <tuple> in C++11.
     (map<>::operator[](const key_type&)): Use
     _Rb_tree<>::_M_emplace_hint_unique in C++11.
     (map<>::operator[](key_type&&)): Likewise.
     (map<>::emplace): New.
     (map<>::emplace_hint): New.
     * include/bits/stl_multimap.h (multimap<>::emplace): New.
     (multimap<>::emplace_hint): New.
     * include/bits/stl_set.h (set<>::emplace): New.
     (set<>::emplace_hint): New.
     * include/bits/stl_multiset.h (multiset<>::emplace): New.
     (multiset<>::emplace_hint): New.
     * include/debug/map.h (std::__debug::map<>::emplace): New.
     (std::__debug::map<>::emplace_hint): New.
     * include/debug/multimap.h (std::__debug::multimap<>::emplace):
     New.
     (std::__debug::multimap<>::emplace_hint): New.
     * include/debug/set.h (std::__debug::set<>::emplace): New.
     (std::__debug::set<>::emplace_hint): New.
     * include/debug/multiset.h (std::__debug::multiset<>::emplace):
     New.
     (std::__debug::multiset<>::emplace_hint): New.
     * testsuite/util/testsuite_container_traits.h: Signal that emplace
     and emplace_hint are available on std::map, std::multimap,
     std::set and std::multiset in C++11.
     * testsuite/23_containers/map/modifiers/emplate/1.cc: New.
     * testsuite/23_containers/multimap/modifiers/emplate/1.cc: New.
     * testsuite/23_containers/set/modifiers/emplate/1.cc: New.
     * testsuite/23_containers/multiset/modifiers/emplate/1.cc: 
New.Tested under linux x86_64.

Tested x86_64 linux, normal/debug modes, C++98/C++11 modes.

Ok to commit ?

François

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