https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109640
--- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The trunk branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>: https://gcc.gnu.org/g:f2061b2a9641c2228d4e2d86f19532ad7e93d627 commit r14-8636-gf2061b2a9641c2228d4e2d86f19532ad7e93d627 Author: Marek Polacek <pola...@redhat.com> Date: Thu Jan 25 12:08:14 2024 -0500 c++: avoid -Wdangling-reference for std::span-like classes [PR110358] Real-world experience shows that -Wdangling-reference triggers for user-defined std::span-like classes a lot. We can easily avoid that by considering classes like template<typename T> struct Span { T* data_; std::size len_; }; to be std::span-like, and not warning for them. Unlike the previous patch, this one considers a non-union class template that has a pointer data member and a trivial destructor as std::span-like. PR c++/110358 PR c++/109640 gcc/cp/ChangeLog: * call.cc (reference_like_class_p): Don't warn for std::span-like classes. gcc/ChangeLog: * doc/invoke.texi: Update -Wdangling-reference description. gcc/testsuite/ChangeLog: * g++.dg/warn/Wdangling-reference18.C: New test. * g++.dg/warn/Wdangling-reference19.C: New test. * g++.dg/warn/Wdangling-reference20.C: New test.
