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 DE23838937EC; Thu, 15 Dec 2022 20:54:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DE23838937EC
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1671137683;
	bh=jovbRqSagzxGWoLWCcsijX3fphhs7xtnX/OEA+8mGsg=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=DhLI765VDtoWlPVHoEqS3c6obUZ7s3ENfGcxlj8SJARb02S6rD+Cl+j9vtQsmAHJ/
	 kfNiVJ10cDtUkipGjS/U1iu/VFa/dWdmrLOXkg44lbVrS0wZ+Q6RxolYph1TytXsOY
	 4MqUftPlNZ+QdTD/wsTi9rQLqbzgV/2syHv3R2JI=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/105518] [rejects valid] nested lambda using an outer type
 alias fails with constexpr integer in that alias
Date: Thu, 15 Dec 2022 20:54:43 +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: c++-lambda, rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit 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: <bug-105518-4-7O43eKCpOJ@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-105518-4@http.gcc.gnu.org/bugzilla/>
References: <bug-105518-4@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=3D105518

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Patrick Palka <ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:be124477b38a71ba8ba0b24d859ae764bb44a4eb

commit r13-4729-gbe124477b38a71ba8ba0b24d859ae764bb44a4eb
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Dec 15 15:54:31 2022 -0500

    c++: local alias in typename in lambda [PR105518]

    We substitute the qualifying scope of a TYPENAME_TYPE directly using
    tsubst_aggr_type (so that we can pass entering_scope=3Dtrue) instead of
    going through tsubst, which means we don't properly reuse typedefs
    during this substitution.  This ends up causing us to reject the below
    testcase because we substitute the TYPENAME_TYPE alias::type as if it
    were written without the A<t> alias, and thus we expect the non-capturi=
ng
    lambda to capture t.

    This patch fixes this by making tsubst_aggr_type delegate typedefs
    to tsubst so that get consistently reused, and then adjusting the result
    appropriately if entering_scope is true.  In passing, this refactors
    tsubst_aggr_type into two functions, one that's intended to be called
    directly and a more minimal one that's intended to be called only from
    the RECORD/UNION/ENUMERAL_TYPE cases of tsubst (and contains only the
    necessary bits for that call site).

            PR c++/105518

    gcc/cp/ChangeLog:

            * pt.cc (tsubst_aggr_type): Handle typedefs by delegating to
            tsubst and adjusting the result if entering_scope.  Split out
            the main part of the function into ...
            (tsubst_aggr_type_1) ... here.
            (tsubst): Use tsubst_aggr_type_1 instead of tsubst_aggr_type.
            Handle TYPE_PTRMEMFUNC_P RECORD_TYPEs here instead of in
            tsubst_aggr_type_1.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/lambda/lambda-alias1.C: New test.=