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 A1DCA388E800; Fri, 23 Jul 2021 20:15:17 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A1DCA388E800
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/78609] invalid member's visibility detection in constexpr
 with arrays
Date: Fri, 23 Jul 2021 20:15:17 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 6.2.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
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: cf_reconfirmed_on short_desc bug_status
 everconfirmed
Message-ID: <bug-78609-4-lzcax5EGXJ@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-78609-4@http.gcc.gnu.org/bugzilla/>
References: <bug-78609-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Jul 2021 20:15:17 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D78609

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-07-23
            Summary|invalid member's visibility |invalid member's visibility
                   |detection in constexpr      |detection in constexpr with
                   |                            |arrays
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.  The problem is with taking the address of a field and templates.
Here is a reduced testcase:
struct A
{
private:
        char data;
public:
        constexpr const char *c_str() const { return &data; }
        constexpr A(char const str) : data(str) {};
        constexpr A() : data()  {};
};
template<size_t>
struct B
{
        static const constexpr A name =3D A{'a'};
        static const constexpr char * value =3D name.c_str();
};
template<size_t I>
const constexpr A B<I>::name;

const char  *c =3D B<0>::value;

---- CUT ----
If I make B a non-template, then it will work correctly.=