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 2E7B039ACC00; Fri, 16 Jul 2021 22:05:31 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2E7B039ACC00
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66968] Incorrect template argument shown in diagnostic
Date: Fri, 16 Jul 2021 22:05:31 +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: 6.0
X-Bugzilla-Keywords: diagnostic
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-66968-4-j7dAT8jeDq@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-66968-4@http.gcc.gnu.org/bugzilla/>
References: <bug-66968-4@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, 16 Jul 2021 22:05:31 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D66968

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <redi@gcc.gnu.org>:

https://gcc.gnu.org/g:3dbc7b809a62167b36f217ab5f43207be19e5908

commit r12-2379-g3dbc7b809a62167b36f217ab5f43207be19e5908
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Jul 16 20:59:43 2021 +0100

    libstdc++: Improve diagnostics for std::get with invalid tuple index

    This adds a deleted overload of std::get<I>(const tuple<Types...>&).
    Invalid calls with an out of range index will match the deleted overload
    and give a single, clear error about calling a deleted function, instead
    of overload resolution errors for every std::get overload in the
    library.

    This changes the current output of 15+ errors (plus notes and associated
    header context) into just two errors (plus context):

    error: static assertion failed: tuple index must be in range
    error: use of deleted function 'constexpr std::__enable_if_t<(__i >=3D
sizeof... (_Types))> std::get(const std::tuple<_Types ...>&) [with long
unsigned int __i =3D 1; _Elements =3D {int}; std::__enable_if_t<(__i >=3D s=
izeof...
(_Types))> =3D void]'

    This seems like a nice improvement, although PR c++/66968 means that
    "_Types" is printed in the signature rather than "_Elements".

    Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

    libstdc++-v3/ChangeLog:

            * include/std/tuple (get<I>): Add deleted overload for bad
            index.
            * testsuite/20_util/tuple/element_access/get_neg.cc: Adjust
            expected errors.=