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 A89923853D24; Fri, 12 May 2023 15:08:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A89923853D24
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1683904082;
	bh=zqNTL0mML3fGnZm8Nq+3MfljYfWModAsiz1G1auiAZo=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=wTTfPtnSMpD22/ivxRhWL5mAEno6bkTFDrQpuOMr7jdl78SFpNYoEuMrJ+6QSVNVq
	 7Bm2mE0bp1V6aViVO+Aq4der+ovwYq52Wt0b+4lQMXK/Kzr1njjgY0wJZYyfmHcQ31
	 vCdSTcyzMzPSzpjdgTTTG8JybQwBW8ELnpjzfkiY=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80488] Erroneous error "lambda-expression in template
 argument"
Date: Fri, 12 May 2023 15:08:01 +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: 8.0
X-Bugzilla-Keywords: c++-lambda, 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: 13.2
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-80488-4-jleBzCZBh6@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-80488-4@http.gcc.gnu.org/bugzilla/>
References: <bug-80488-4@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=3D80488

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Patrick Palka
<ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:42f9b481be3527b336b800128247d053fd18d121

commit r13-7324-g42f9b481be3527b336b800128247d053fd18d121
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu May 11 10:04:25 2023 -0400

    c++: converted lambda as template argument [PR83258, ...]

    r8-1253-g3d2e25a240c711 removed the template argument linkage requireme=
nt
    in convert_nontype_argument for C++17 (which r9-3836-g4be5c72cf3ea3e la=
ter
    factored out into invalid_tparm_referent_p), but we need to also remove
    the one in convert_nontype_argument_function for benefit of the first a=
nd
    third testcase which we currently reject even in C++17/20 mode.

    And in invalid_tparm_referent_p we're inadvertendly returning false for
    the address of a lambda's static op() since it's DECL_ARTIFICIAL, which
    currently causes us to reject the second (C++20) testcase.  But this
    DECL_ARTIFICIAL check seems to be relevant only for VAR_DECL, and in fa=
ct
    this code path was originally reachable only for VAR_DECL until recently
    (r13-6970-gb5e38b1c166357).  So this patch restricts the check to VAR_D=
ECL.

    Co-authored-by: Jonathan Wakely <jwakely@redhat.com>

            PR c++/83258
            PR c++/80488
            PR c++/97700

    gcc/cp/ChangeLog:

            * pt.cc (convert_nontype_argument_function): Remove linkage
            requirement for C++17 and later.
            (invalid_tparm_referent_p) <case ADDR_EXPR>: Restrict
            DECL_ARTIFICIAL rejection test to VAR_DECL.

    gcc/testsuite/ChangeLog:

            * g++.dg/ext/visibility/anon8.C: Don't expect a "no linkage"
            error for the template argument &B2:fn in C++17 mode.
            * g++.dg/cpp0x/lambda/lambda-conv15.C: New test.
            * g++.dg/cpp2a/nontype-class56.C: New test.
            * g++.dg/template/function2.C: New test.

    (cherry picked from commit c3afdb8ba8f1839544c414f57e41a58c8fda5349)=