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 3E27D3858423; Mon, 19 Dec 2022 16:54:42 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3E27D3858423
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1671468882;
	bh=L7qWrKquxJnFijn4s8bv8X28bRODbsf15rIFBpMyrSM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=kwOA0ohTlUd+7ofCpQHURNhhOO60yjjfOJH03OSAKQlvHcVH17rz+WeqjeWXptCp4
	 Jjax2B8g3J4w86Qi7eIrR6WyGfF0/Dms7CP+NjOSBpLlJ8EEX6PdibmELcwlw/n/vD
	 kZYdgh6Jjxsn2xISX92oVpQCdHX2MiFYfMySHlPA=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/107417] g++ fails to recognize parameter pack in
 requires-expression
Date: Mon, 19 Dec 2022 16:54:41 +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: accepts-invalid, rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: ppalka at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 12.3
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-107417-4-x1XzbqReB9@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-107417-4@http.gcc.gnu.org/bugzilla/>
References: <bug-107417-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107417

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Patrick Palka
<ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:b428bb449be1bdbbd4000b51bb7c665981dc8c8f

commit r12-8996-gb428bb449be1bdbbd4000b51bb7c665981dc8c8f
Author: Patrick Palka <ppalka@redhat.com>
Date:   Sun Dec 4 10:47:24 2022 -0500

    c++: pack in requires-expr parm list [PR107417]

    Here find_parameter_packs_r isn't detecting the pack T inside the
    requires-expr's parameter list ultimately because cp_walk_trees
    deliberately avoids walking the list so as to avoid false positives in
    the unexpanded pack checker.

    But it should still be fine to walk the TREE_TYPE of each parameter,
    which we already need to do from for_each_template_parm_r, and is
    sufficient to fix the testcase.

            PR c++/107417

    gcc/cp/ChangeLog:

            * pt.cc (for_each_template_parm_r) <case REQUIRES_EXPR>: Move
            walking of the TREE_TYPE of each parameter to ...
            * tree.cc (cp_walk_subtrees) <case REQUIRES_EXPR>: ... here.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-requires33.C: New test.

    (cherry picked from commit 079add3ad39d6620d34665dd9c26c21951eb657c)=