https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106111
--- Comment #5 from CVS 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:2ea6c59349793761b9c00f75ef281ac413566b2f commit r13-1394-g2ea6c59349793761b9c00f75ef281ac413566b2f Author: Marek Polacek <pola...@redhat.com> Date: Tue Jun 28 18:59:19 2022 -0400 c++: warn about using keywords as identifiers [PR106111] In C++03, -Wc++11-compat should warn about int constexpr; since 'constexpr' is a keyword in C++11. Jonathan reports that we don't emit a similar warning for 'alignas' or 'alignof', and, as I found out, 'thread_local'. Similarly, we don't warn for most C++20 keywords. That happens because RID_LAST_CXX20 hasn't been updated in a while. PR c++/106111 gcc/c-family/ChangeLog: * c-common.h (enum rid): Update RID_LAST_CXX20. gcc/cp/ChangeLog: * parser.cc (cp_lexer_get_preprocessor_token): Also warn about RID_ALIGNOF, RID_ALIGNAS, RID_THREAD. gcc/testsuite/ChangeLog: * g++.dg/cpp0x/keywords1.C: New test. * g++.dg/cpp2a/keywords1.C: New test.
