2011-11-15  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/51142
	* include/debug/unordered_map (unordered_map<>::erase(iterator),
	unordered_multimap<>::erase(iterator)): Add, consistently with
	LWG 2059.
	* include/debug/unordered_set (unordered_set<>::erase(iterator),
	unordered_multiset<>::erase(iterator)): Likewise.
	* include/debug/map.h (map<>::erase(iterator)): Likewise.
	* include/debug/multimap.h (multimap<>::erase(iterator)): Likewise.
	* include/profile/map.h (map<>::erase(iterator)): Likewise.
	* include/profile/multimap.h (multimap<>::erase(iterator)): Likewise.
	* include/bits/hashtable.h (_Hashtable<>::erase(iterator)): Likewise.
	* include/bits/stl_map.h (map<>::erase(iterator)): Likewise.
	* include/bits/stl_multimap.h (multimap<>::erase(iterator)): Likewise.
	* include/bits/stl_tree.h (_Rb_tree<>::erase(iterator)): Likewise.
	* testsuite/23_containers/unordered_map/erase/51142.cc: New.
	* testsuite/23_containers/multimap/modifiers/erase/51142.cc: Likewise.
	* testsuite/23_containers/set/modifiers/erase/51142.cc: Likewise.
	* testsuite/23_containers/unordered_multimap/erase/51142.cc: Likewise.
	* testsuite/23_containers/unordered_set/erase/51142.cc: Likewise.
	* testsuite/23_containers/multiset/modifiers/erase/51142.cc: Likewise.
	* testsuite/23_containers/unordered_multiset/erase/51142.cc: Likewise.
	* testsuite/23_containers/map/modifiers/erase/51142.cc: Likewise.

From-SVN: r181394