From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-61607-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 24273 invoked by alias); 15 Oct 2002 16:21:53 -0000
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
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
Received: (qmail 24263 invoked from network); 15 Oct 2002 16:21:52 -0000
Received: from unknown (HELO piper.synopsys.com) (146.225.1.217)
  by sources.redhat.com with SMTP; 15 Oct 2002 16:21:52 -0000
Received: (from jbuck@localhost)
	by piper.synopsys.com (8.11.6/8.11.6) id g9FGLIF19813;
	Tue, 15 Oct 2002 09:21:18 -0700
From: Joe Buck <jbuck@synopsys.com>
Message-Id: <200210151621.g9FGLIF19813@piper.synopsys.com>
Subject: Re: gcc 3.2.1 draft release notes, 3rd draft
To: mark@codesourcery.com (Mark Mitchell)
Date: Tue, 15 Oct 2002 10:10:00 -0000
Cc: Joe.Buck@synopsys.COM (Joe Buck), gcc@gcc.gnu.org (gcc@gcc.gnu.org)
In-Reply-To: <19300000.1034659238@warlock.codesourcery.com> from "Mark Mitchell" at Oct 14, 2002 10:20:38 PM
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-SW-Source: 2002-10/txt/msg00831.txt.bz2

I wrote:

> > Can we always tell people to turn
> >
> > typedef T = expression;
> >
> > into
> >
> > typedef typeof(expression) T;
> >
> > ?
> 
> Yes; those two forms should be equivalent, as far as I know.

Then how about adding a rule something like the following to the bison
grammar (yes, I know these are the wrong terminal names, but the idea
should be clear):

       TYPEDEF ID '=' error ';'
	       { error("Please use __typeof() instead");}

However, I don't understand why the extension was removed.  If its
presence makes it harder to parse valid C/C++ the removal might be
justified.