https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66159
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:d392babbeb6cb531ab8b1ec68fde9ffd36373a6e commit r11-1459-gd392babbeb6cb531ab8b1ec68fde9ffd36373a6e Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Jun 17 20:26:13 2020 +0100 c++: Fix bogus "does not declare anything" warning (PR 66159) G++ gives a bogus warning for 'struct A; using B = struct ::A;' complaining that the elaborated-type-specifier doesn't declare anything. That's true, but it's not trying to declare struct ::A, just refer to it unambiguously. Do not emit the warning unless we're actually parsing a declaration. gcc/cp/ChangeLog: PR c++/66159 * parser.c (cp_parser_elaborated_type_specifier): Do not warn unless in a declaration. gcc/testsuite/ChangeLog: PR c++/66159 * g++.dg/warn/forward-inner.C: Check alias-declaration using elaborated-type-specifier.
