From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1195B3858D28; Wed, 6 Jul 2022 22:39:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1195B3858D28 From: "davidfromonline at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/106211] Rejects valid with function template with non-deduced parameters from deduced parameters of another function template Date: Wed, 06 Jul 2022 22:39:12 +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: 13.0 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: davidfromonline at gmail dot com 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: 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, 06 Jul 2022 22:39:12 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106211 --- Comment #4 from David Stone --- The types for the first parameters of the inner lambda are deduced in my fi= rst two examples, but the arity is fixed in all of them -- equal to the arity of the outer function. Also, `return [](any auto, auto) {};` is perfectly valid. It accepts o= ne argument that satisfies `any` (which is any type), and another argument that matches anything -- in other words, two arguments.=