https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71448
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #5) > That said, I wonder if it is ok that we don't reject clear out of bound > POINTER_PLUS_EXPR in constexprs, like: > static constexpr const char foo[] = "foo"; > static constexpr const char *bar = "bar"; > > static_assert (foo < foo + 30, "check"); > static_assert (foo != foo + 30, "check"); > static_assert (bar <= bar + 30, "check"); > static_assert (bar != bar + 30, "check"); > > But that is preexisting, the patch doesn't really change anything on that, > and most likely we want to handle this in the FE (if at all). Those should all be rejected in the static_assert because they are not core constant expressions as a result of the undefined behavior in the pointer arithmetic. Bug 70151 tracks this defect.
