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 9A1D93857032; Mon, 10 Aug 2020 15:22:06 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9A1D93857032
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1597072926;
 bh=GvHGVHXoOgMnS9RiK7wy/T+srEi6vaYoytVUU8tv+C0=;
 h=From:To:Subject:Date:From;
 b=yu+BkwJP+tz8fvCd6yjgcPSXH61lzuxtET5i4U6b448Mc3eYu16qhccHSNZL6gmng
 YpmxoOdRm5lXRUj+MWIz61Ebn9IzIdAGArtJR6D/Mu9/yqyPRb1HNwUKTLKTQqxXG1
 4mdC8Nh0+DhAKmSpwI1dgIiamATsYo1uAAXuhH5E=
From: "arthur.j.odwyer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96555] New: "template argument involves template
 parameter(s)" with dot or arrow operator in partial specialization
Date: Mon, 10 Aug 2020 15:22:06 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: arthur.j.odwyer 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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-96555-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 10 Aug 2020 15:22:06 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96555

            Bug ID: 96555
           Summary: "template argument involves template parameter(s)"
                    with dot or arrow operator in partial specialization
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: arthur.j.odwyer at gmail dot com
  Target Milestone: ---

// https://godbolt.org/z/Kc98ea
struct A { int x; };
extern A a;
template<int...> struct B {};
template<int y>
struct B<y, sizeof(a.x)> {};


<source>:5:8: error: template argument '(int)sizeof (a.x)' involves template
parameter(s)
    5 | struct B<y, sizeof(a.x)> {};
      |        ^~~~~~~~~~~~~~~~~


GCC seems to have a problem only with expressions involving the dot operator
(e.g. `sizeof(a.x)`) and the arrow operator (e.g. `sizeof(p->x)`), but not =
any
other operators, which leads me to believe that the root cause here is rela=
ted
to the root cause of bug 96215.

Grepbait: template argument involves template parameters

Same error message in different situations, all involving partial
specializations but none involving dot or arrow specifically: bug 67593, bug
83426, bug 90099=