From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-143549-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 30734 invoked by alias); 17 Jan 2008 13:35:40 -0000
Received: (qmail 30720 invoked by uid 22791); 17 Jan 2008 13:35:40 -0000
X-Spam-Check-By: sourceware.org
Received: from fk-out-0910.google.com (HELO fk-out-0910.google.com) (209.85.128.184)     by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 17 Jan 2008 13:35:22 +0000
Received: by fk-out-0910.google.com with SMTP id 26so428405fkx.8         for <gcc@gcc.gnu.org>; Thu, 17 Jan 2008 05:35:19 -0800 (PST)
Received: by 10.82.112.3 with SMTP id k3mr3636946buc.31.1200576919299;         Thu, 17 Jan 2008 05:35:19 -0800 (PST)
Received: by 10.82.173.1 with HTTP; Thu, 17 Jan 2008 05:35:19 -0800 (PST)
Message-ID: <84fc9c000801170535k1bd3eb89p6f95d63ee6f58647@mail.gmail.com>
Date: Thu, 17 Jan 2008 14:46:00 -0000
From: "Richard Guenther" <richard.guenther@gmail.com>
To: "Dragan Milenkovic" <dragan@plusplus.co.yu>
Subject: Re: A simple sample code involving templates, friends and lookup
Cc: gcc@gcc.gnu.org
In-Reply-To: <478F544F.9060509@plusplus.co.yu>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <478F3175.2050809@plusplus.co.yu> 	 <84fc9c000801170449j332abd0bp501bbc2fd9d04c46@mail.gmail.com> 	 <478F544F.9060509@plusplus.co.yu>
X-IsSubscribed: yes
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc/>
List-Post: <mailto:gcc@gcc.gnu.org>
List-Help: <http://gcc.gnu.org/ml/>
Sender: gcc-owner@gcc.gnu.org
X-SW-Source: 2008-01/txt/msg00264.txt.bz2

On Jan 17, 2008 2:12 PM, Dragan Milenkovic <dragan@plusplus.co.yu> wrote:
> Richard Guenther wrote:
> [snip]
> >> template <typename T>
> >> struct Foo
> >> {
> >>      template <typename Z>
> >>      friend void func(const Foo &);
> >> };
> >>
> >> void check(const Foo<int> & x)
> >> {
> >>      // Foo<int> weird;  // uncomment this line and all works
> >>
> >>      func<int>(x);    // <-- ERROR
> >> }
> >>
> >>
> >> Tested with gcc 4.0 - 4.3, and all behave the same:
> >>
> >> "error: 'func' was not declared in this scope"
> >>
> >> but it works if you uncomment the weird line.
> >
> > Actually even with the weird line the program is invalid.  What are
> > you trying to do? ;)
> >
> > Richard.
>
> Ok... afaik, that func should be defined on that very place where it is
> declared as friend. But could you please elaborate why it is invalid,
> since you made me start questioning my C++ knowledge... :-D

How should name-lookup find func?

Richard.