François Dumont d10b863fa3 libstdc++: Unordered containers merge re-use hash code ... When merging 2 unordered containers with same hasher we can re-use the hash code from the cache if any. Also in the context of the merge operation on multi-container use previous insert iterator as a hint for the next insert. libstdc++-v3/ChangeLog: * include/bits/hashtable_policy.h: (_Hash_code_base<>::_M_hash_code(const _Hash&, const _Hash_node_value<_Value, true>&)): New. (_Hash_code_base<>::_M_hash_code<_H2>(const _H2&, const _Hash_node_value<>&)): New. * include/bits/hashtable.h (_Hashtable<>::_M_merge_unique): Use latter. (_Hashtable<>::_M_merge_multi): Likewise. * testsuite/23_containers/unordered_multiset/modifiers/merge.cc (test05): New test. * testsuite/23_containers/unordered_set/modifiers/merge.cc (test04): New test.		2021-11-15 18:52:07 +01:00
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backward	Update copyright years.	2021-01-04 10:26:59 +01:00
bits	libstdc++: Unordered containers merge re-use hash code	2021-11-15 18:52:07 +01:00
c	Update copyright years.	2021-01-04 10:26:59 +01:00
c_compatibility	Update copyright years.	2021-01-04 10:26:59 +01:00
c_global	libstdc++: Enable type traits for wchar_t unconditionally [PR98725]	2021-10-09 00:57:49 +01:00
c_std	Update copyright years.	2021-01-04 10:26:59 +01:00
debug	libstdc++: [_GLIBCXX_DEBUG] Remove _Safe_container<>::_M_safe()	2021-11-14 21:55:01 +01:00
decimal	libstdc++: Fix doxygen markup for group close commands	2021-04-06 16:43:24 +01:00
experimental	c++: check constexpr constructor body	2021-11-15 02:50:45 -05:00
ext	libstdc++: Enable vstring for wchar_t unconditionally [PR98725]	2021-10-09 00:57:49 +01:00
parallel	Update copyright years.	2021-01-04 10:26:59 +01:00
precompiled	libstdc++: Implement std::spanstream for C++23	2021-11-13 11:45:31 +00:00
pstl	libstdc++: Fix up parallel_backend_serial.h [PR97549]	2021-02-23 09:28:14 +01:00
std	libstdc++: Implement std::spanstream for C++23	2021-11-13 11:45:31 +00:00
tr1	libstdc++: Enable type traits for wchar_t unconditionally [PR98725]	2021-10-09 00:57:49 +01:00
tr2	libstdc++: Fix doxygen markup for group close commands	2021-04-06 16:43:24 +01:00
Makefile.am	libstdc++: Implement std::spanstream for C++23	2021-11-13 11:45:31 +00:00
Makefile.in	libstdc++: Implement std::spanstream for C++23	2021-11-13 11:45:31 +00:00