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 523D7386F436; Wed,  9 Dec 2020 05:36:39 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 523D7386F436
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/98019] Concepts: compound requirement expression from
 'requires' expression is considered discarded-value expression for
 [[nodiscard]], false positive warning emitted
Date: Wed, 09 Dec 2020 05:36:39 +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: 10.2.0
X-Bugzilla-Keywords: diagnostic
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: jason at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-98019-4-jZmMCrLROz@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-98019-4@http.gcc.gnu.org/bugzilla/>
References: <bug-98019-4@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: Wed, 09 Dec 2020 05:36:39 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98019

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:

https://gcc.gnu.org/g:c3a63fb3854392af65a191154e3586e7f5a1066e

commit r11-5873-gc3a63fb3854392af65a191154e3586e7f5a1066e
Author: Jason Merrill <jason@redhat.com>
Date:   Tue Dec 8 21:47:11 2020 -0500

    c++: Avoid [[nodiscard]] warning in requires-expr [PR98019]

    If we aren't really evaluating the expression, it doesn't matter that t=
he
    return value is discarded.

    gcc/cp/ChangeLog:

            PR c++/98019
            * cvt.c (maybe_warn_nodiscard): Check
c_inhibit_evaluation_warnings.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-nodiscard1.C: Remove xfail.=