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DR 2354 adds these overloads to avoid unnecessary copies when doing map.insert({key, val}) PR libstdc++/82522 * doc/xml/manual/intro.xml: Document LWG 2354 changes. * include/bits/stl_map.h (map::insert(value_type&&)) (map::insert(const_iterator, value_type&&)): Add overload for rvalues. * include/bits/stl_multimap.h (multimap::insert(value_type&&)) (multimap::insert(const_iterator, value_type&&)): Likewise. * include/bits/unordered_map.h (unordered_map::insert(value_type&&)) (unordered_map::insert(const_iterator, value_type&&)) (unordered_multimap::insert(value_type&&)) (unordered_multimap::insert(const_iterator, value_type&&)): Likewise. * testsuite/23_containers/map/modifiers/insert/dr2354.cc: New test. * testsuite/23_containers/multimap/modifiers/insert/dr2354.cc: New test. * testsuite/23_containers/unordered_map/insert/dr2354.cc: New test. * testsuite/23_containers/unordered_multimap/insert/dr2354.cc: New test. Tested powerpc64le-linux, committed to trunk.
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