Mailing-List: contact dev-help@stdcxx.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@stdcxx.apache.org
Received-SPF: pass (nike.apache.org: local policy)
Message-ID: <48343E80.6030402@roguewave.com>
Date: Wed, 21 May 2008 09:23:44 -0600
From: Martin Sebor <sebor@roguewave.com>
Organization: Rogue Wave Software, Inc.
User-Agent: Thunderbird 2.0.0.12 (X11/20080226)
MIME-Version: 1.0
To: dev@stdcxx.apache.org
Subject: Re: Differences between tr1 and c++0x
References: 
 <CFFDD219128FD94FB4F92B99F52D0A499AA85A@exchmail01.Blue.Roguewave.Com>
In-Reply-To: 
 <CFFDD219128FD94FB4F92B99F52D0A499AA85A@exchmail01.Blue.Roguewave.Com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Travis Vitek wrote:
> As most of us know, I've been working on type_traits for the 4.3
> release. In doing so, I've noticed that there are some pretty
> significant differences between tr1 and c++0x. My question is what
> _exactly_ are we wanting to implement here? Do we want to have the tr1
> stuff as it is documented [in the tr1 final], or do we want the tr1
> additions as they appear in the c++0x working draft?
> 
> Some of the issues...
> 
> 	1. The namespace that these features appear in [std::tr1 vs std]
>       2. Section numbers for test names [4.meta.rel.cpp vs
> 20.meta.rel.cpp]
> 	3. Subtle differences between behavior of traits
> 	4. Deprecated traits like add_reference [now
> add_lvalue_reference]
> 
> I just want to make absolutely sure that I'm working with the same
> expectations as everyone else and that we are trying to implement the
> c++0x draft features that were introduced in tr1. I'm currently writing
> to the c++0x draft, but my tests use old section numbers from the tr1
> final, and everything I've written is currently in the std::tr1
> namespace [using a macro _TR1].

IMO, we should target C++ 0x and forget TR1 even exists ;-)
That said, all C++ 0x code should be guarded with the same
macro until the next standard is released. Maybe something
like _RWSTD_NO_EXT_CXX_0X?

Martin