From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 65158 invoked by alias); 13 Jul 2015 20:31:59 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 65103 invoked by uid 48); 13 Jul 2015 20:31:55 -0000 From: "jason at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/66834] [concepts] concept parameter kind mismatch causes hard error Date: Mon, 13 Jul 2015 20:31:00 -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: c++-concepts X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jason at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-07/txt/msg01068.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66834 --- Comment #9 from Jason Merrill --- (In reply to Jason Merrill from comment #8) > I think we should reconsider the rule against partial specialization of a > variable concept, as that seems like the right way to handle this situation. Except that would still run into the DR 1430 issue: a requires-clause that uses a pack expansion would normalize using the primary template defined with a parameter pack, even if a later instantiation of that requires-clause would work better with a different partial specialization.