From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id A3928385842B; Wed, 18 Jan 2023 18:45:14 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A3928385842B
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1674067514;
	bh=Ed4zwRjJltlgRs3DGh0YA3yeA8HFmdxI+tqVhZ4EWnc=;
	h=From:To:Subject:Date:From;
	b=SGhrIj7xzo6dqFcW7jYeS9R8GldGVobXoan32j17M5Z2l1U8Fvo6+8k0NDMCLciu9
	 cq3Pe++mt2WBHAQmPEfHWbrVzlVqNhAY6BOOZoxlZmRwtb8sl5ZTkoNwboqK8BiYrZ
	 ylDM33yXo0OZ4y2yylHLYIYTcUoSKGa6yAtEO6Ag=
From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/108456] New: attribute deprecated on enum doesn't warn
Date: Wed, 18 Jan 2023 18:45:14 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mpolacek at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-108456-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108456

            Bug ID: 108456
           Summary: attribute deprecated on enum doesn't warn
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org
  Target Milestone: ---

In this test:

struct S {
  enum [[deprecated]] E { D };
};

int main()
{
  auto a1 =3D S::D;
  auto a2 =3D S::E::D;
}

we emit a -Wdeprecated-declarations warning only for a2 but not a1, whereas
clang++ warns for a1 too (twice, in fact).  I suppose we want a warning the=
re
as well.

C++20 using enum test:

enum class [[deprecated]] E { X };

int main()
{
    using enum E;
    auto a =3D X;
}

clang++ warns but g++ doesn't.=