https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122842
--- Comment #10 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-15 branch has been updated by Patrick Palka <[email protected]>: https://gcc.gnu.org/g:236279e8ed27ef759a01064dc6da55fecf94a620 commit r15-10561-g236279e8ed27ef759a01064dc6da55fecf94a620 Author: Patrick Palka <[email protected]> Date: Fri Nov 28 15:38:04 2025 -0500 libstdc++: Correctly implement LWG 3946 changes to const_iterator_t [PR122842] LWG 3946 made const_iterator_t/sentinel_t agree with ranges::cbegin/cend by defining the aliases in terms of the CPOs, but I defined it the other way around in an incorrect way that made the aliases not consider range-ness of const T via __possibly_const_range. This patch reimplements the proposed resolution in a more obviously correct way, mirroring the wording. PR libstdc++/122842 libstdc++-v3/ChangeLog: * include/bits/ranges_base.h (__access:_CBegin): Define in terms of const_iterator directly, not const_iterator_t. (__access::_CEnd): Likewise in terms of const_sentinel vs const_sentinel_t. (const_iterator_t): Move down definition and define in terms of ranges::cbegin as per LWG 3946. (const_sentinel_t): Likewise in terms of ranges::cend. * testsuite/24_iterators/const_iterator/1.cc (test02): Correct test for int[], std::array and std::vector. Also test std::string. Reviewed-by: Tomasz KamiÅski <[email protected]> Reviewed-by: Jonathan Wakely <[email protected]> (cherry picked from commit 2d3142c00934c419755c17dd85ecdb0e72f249d1)
