From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 12CB73858400; Wed, 22 Sep 2021 14:30:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 12CB73858400 From: "redbeard0531 at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/100493] Lambda default copy capture that captures "this" cannot be used in both C++17 and C++20 modes Date: Wed, 22 Sep 2021 14:30:38 +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: 10.3.1 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: redbeard0531 at gmail dot com 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: In-Reply-To: References: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 22 Sep 2021 14:30:39 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100493 --- Comment #3 from Mathias Stearn --- When reading https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D82611, I notice= d that C++17 actually requires the warning on [=3D, this] from a conforming implementation: https://timsong-cpp.github.io/cppwp/n4659/expr.prim.lambda.capture#2. Howev= er, given that this requirement was lifted in C++20, would it be possible to on= ly warn about that in -std=3Dc++17 (or lower) with -pedantic? It seems counterproductive to warn about it without -pedantic.=