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 993E43844070; Mon, 27 Jul 2020 15:35:54 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 993E43844070
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1595864154;
 bh=n06hpK9XtcamzIOa1fcLULYovGKhB2T4BXgHAPvOeLo=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=jtbvMVtNmOHf5BB/kSiKAm74tMJ6Ep/7Bqm3AgqFjjyuQ4JQ4y/n4F6knWAOhiYls
 0NN+JU4/jurnRG57tDOoeg5psfc3UQucM7xmypSEC01VwSMPzS2MPBXiyds7rJGsB7
 92SCfWehQSJhwf2AVuxUTV/DnXxCyjwacqDWmqUY=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96330] Constexpr variables cannot be used in the template
 context.
Date: Mon, 27 Jul 2020 15:35:54 +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: 10.1.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub 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: cc
Message-ID: <bug-96330-4-VqhxYvnwPe@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96330-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96330-4@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: <http://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: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 27 Jul 2020 15:35:54 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96330

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Tried
--- gcc/cp/pt.c.jj      2020-07-27 10:38:19.000000000 +0200
+++ gcc/cp/pt.c 2020-07-27 17:25:09.748240198 +0200
@@ -16838,14 +16838,17 @@ tsubst_copy (tree t, tree args, tsubst_f
     case TEMPLATE_ID_EXPR:
       {
        /* Substituted template arguments */
-       tree fn =3D TREE_OPERAND (t, 0);
+       tree expr =3D TREE_OPERAND (t, 0);
        tree targs =3D TREE_OPERAND (t, 1);

-       fn =3D tsubst_copy (fn, args, complain, in_decl);
+       expr =3D tsubst_copy (expr, args, complain, in_decl);
        if (targs)
          targs =3D tsubst_template_args (targs, args, complain, in_decl);

-       return lookup_template_function (fn, targs);
+        if (variable_template_p (expr))
+         return lookup_and_finish_template_variable (expr, targs, complain=
);
+       else
+         return lookup_template_function (expr, targs);
       }

     case TREE_LIST:
but that just means an ICE elsewhere.=