From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-410086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 10652 invoked by alias); 17 Dec 2012 19:26:04 -0000
Received: (qmail 10295 invoked by uid 48); 17 Dec 2012 19:25:40 -0000
From: "ed at catmur dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/55724] [C++11] Default type of a template value is not working
Date: Mon, 17 Dec 2012 19:26:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ed at catmur dot co.uk
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-55724-4-wWCTBBTTbT@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-55724-4@http.gcc.gnu.org/bugzilla/>
References: <bug-55724-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-12/txt/msg01694.txt.bz2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55724

--- Comment #1 from Ed Catmur <ed at catmur dot co.uk> 2012-12-17 19:25:39 UTC ---
It's not entirely clear in the standard, but my understanding of 14.8.2p5 is
that default template argument substitution is contemporaneous to template
argument deduction for any particular parameter.  Non-type template parameter
types deduced from preceding arguments *are* accepted by gcc:

template<int N> struct S {};
template<typename T, T N> void g(T, S<N>) {}
int main() { S<1> s; g(2, s); }