https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117921
--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-14 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:dd8866d79632ddcf4811859e98f5c990627d5727 commit r14-11355-gdd8866d79632ddcf4811859e98f5c990627d5727 Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Dec 5 12:46:26 2024 +0000 libstdc++: Use ADL swap for containers' function objects [PR117921] The standard says that Compare, Pred and Hash objects should be swapped as described in [swappable.requirements] which means calling swap unqualified with std::swap visible to name lookup. libstdc++-v3/ChangeLog: PR libstdc++/117921 * include/bits/hashtable_policy.h (_Hash_code_base::_M_swap): Use ADL swap for Hash members. (_Hashtable_base::_M_swap): Use ADL swap for _Equal members. * include/bits/stl_tree.h (_Rb_tree::swap): Use ADL swap for _Compare members. * testsuite/23_containers/set/modifiers/swap/adl.cc: New test. * testsuite/23_containers/unordered_set/modifiers/swap-2.cc: New test. (cherry picked from commit 0368c42507328774cadbea589509b95aaf3cb826)