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 373793850423; Mon, 29 Mar 2021 20:03:12 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 373793850423
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/93628] ranges::equal_to doesn't work for types
 convertible to function pointers
Date: Mon, 29 Mar 2021 20:03:12 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 10.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit 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: 
Message-ID: <bug-93628-4-WIruqwjMIk@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-93628-4@http.gcc.gnu.org/bugzilla/>
References: <bug-93628-4@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: Mon, 29 Mar 2021 20:03:12 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93628

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:913312de92522e9e6696331fc3018e1020845c26

commit r10-9591-g913312de92522e9e6696331fc3018e1020845c26
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Wed Mar 10 15:27:06 2021 +0000

    libstdc++: Implement LWG 3530 for concept-constrained comparisons

    The proposed resolution for this library issue simplifies the
    constraints for compare_three_way, ranges::equal_to, ranges::less etc.
    so that they do not work with types which are convertible to pointers
    but which fail to meet the usual syntactic requirements for the
    comparisons.

    This affects the example in PR libstdc++/93628 but doesn't fix the
    problem described in that report.

    libstdc++-v3/ChangeLog:

            * include/bits/range_cmp.h (__eq_builtin_ptr_cmp): Remove.
            (ranges::equal_to, ranges::not_equal_to): Do not constrain
            with __eq_builtin_ptr_cmp.
            (ranges::less, ranges::greater, ranges::less_equal)
            (ranges::greater_equal): Do not constrain with
            __less_builtin_ptr_cmp.
            * libsupc++/compare (compare_three_way): Do not constrain with
            __3way_builtin_ptr_cmp.
            * testsuite/18_support/comparisons/object/builtin-ptr-three-way=
.cc:
Moved to...
            * testsuite/18_support/comparisons/object/lwg3530.cc: ...here.
            * testsuite/20_util/function_objects/range.cmp/lwg3530.cc: New
test.

    (cherry picked from commit dddd011113b6ceede733d7ae33eca695c06b181b)=