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 A6A89388C00E; Sat,  6 Mar 2021 05:08:14 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A6A89388C00E
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96330] Constexpr variables cannot be used in the template
 context.
Date: Sat, 06 Mar 2021 05:08:14 +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: 10.1.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit 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: 
Message-ID: <bug-96330-4-1SnXf5UuZ4@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96330-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96330-4@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: Sat, 06 Mar 2021 05:08:14 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96330

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:574e7601829733d7cae20b5dc7034b876cc76b30

commit r11-7541-g574e7601829733d7cae20b5dc7034b876cc76b30
Author: Patrick Palka <ppalka@redhat.com>
Date:   Sat Mar 6 00:07:43 2021 -0500

    c++: Fix tsubsting member variable template-id [PR96330]

    This makes tsubst_copy appropriately handle a variable template-id, whi=
ch
    in turn fixes tsubsting a COMPONENT_REF whose member operand is known at
    parse time to be a variable template-id, as in the initialization of 'x'
    in the first testcase.  Previously, we rejected this testcase with the
    error "foo_t::bar<T> is not a function template", issued from
    lookup_template_fuction.

    We were already properly handling the analagous case where the object
    operand of the COMPONENT_REF is dependent (and so the member operand is
    a dependent template name), but there doesn't seems to be existing test
    coverage for this, hence the second testcase below.

    gcc/cp/ChangeLog:

            PR c++/96330
            * pt.c (tsubst_copy) <case TEMPLATE_ID_EXPR>: Rename local
            variable 'fn' to 'tmpl'.  Handle a variable template-id by
            calling lookup_template_variable.

    gcc/testsuite/ChangeLog:

            PR c++/96330
            * g++.dg/cpp1y/var-templ68.C: New test.
            * g++.dg/cpp1y/var-templ68a.C: New test.

    Co-authored-by: Jakub Jelinek <jakub@redhat.com>=