From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BB5853858D33; Tue, 29 Nov 2022 11:30:35 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BB5853858D33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1669721435; bh=QtFS55iDfduzcsllTejSp78URwF3D4roj00HrqEW39o=; h=From:To:Subject:Date:In-Reply-To:References:From; b=rDDj4R9w8c1qqwsHFHEQoLea473+l2fYCHAEUnRCQorBkiNcLHlsib4whps/g9Kss cDWXq7pp0EKbYdfYOzKo3UiKiA74IO/YhWN/6jxy7hb4k+VeNBzS426fvGXtsLZ/Y+ WfccKs46pBQj/+7ThefRLNuVgk5G7eaj6QBL0ons= From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/107850] [12 Regression] std::erase_if (map) forces predicate to takes a const value_type Date: Tue, 29 Nov 2022 11:30:35 +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: 12.1.0 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: redi at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: redi at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.3 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107850 --- Comment #7 from Jonathan Wakely --- See also https://cplusplus.github.io/LWG/issue2542 which was another change= in the same vein. Generally, we're getting stricter about rejecting predicates like yours, because reasoning about the program because harder (and sometim= es implementing those algorithms because unreasonably complex) if predicates h= ave non-obvious side effects like modifying elements.=