From: Matt Austern <austern@apple.com>
To: Joe Buck <Joe.Buck@synopsys.com>
Cc: Steve Naroff <snaroff@apple.com>,
gcc mailing list <gcc@gcc.gnu.org>, Michael Matz <matz@suse.de>,
Ziemowit Laski <zlaski@apple.com>,
Andrew Pinski <pinskia@physics.uc.edu>,
Mike Stump <mrs@apple.com>
Subject: Re: generalized lvalues -- patch outline
Date: Mon, 22 Nov 2004 22:12:00 -0000 [thread overview]
Message-ID: <C93962D2-3CCF-11D9-8AF3-000A95AA5E5E@apple.com> (raw)
In-Reply-To: <20041122133935.A19882@synopsys.com>
On Nov 22, 2004, at 1:39 PM, Joe Buck wrote:
> On Mon, Nov 22, 2004 at 01:23:22PM -0800, Matt Austern wrote:
>> Unfortunately, there is another reason for allowing some tamed version
>> of assignment to casts: compatibility with other compilers. Microsoft
>> and CodeWarrior both allow this in one form or another. (Microsoft
>> for
>> C only, CodeWarrior for C++ as well. CodeWarrior only allows some
>> limited forms of assignments to casts, and doesn't treat a cast as a
>> true lvalue, so they still get overload resolution right.)
>
> Does CodeWarrior document the semantics of their extension?
I'm trying to find that out. It's taking me a while, I'm afraid,
partly because I'm not all that familiar with their documentation. I
agree that's an important question. Another important question that I
don't know the answer to: are there other compilers that accept some
form of this extension? I wouldn't be surprised; lots of people have
MS-compatibility modes.
One oddity I've found is that CW allows this:
int x;
int* p = x;
char c;
(char*) p = &c;
but not this:
int x;
(char) x = 'a';
And, as I said, they do choose the correct overload when you pass
((char*) p) to a function that's overloaded on char*& and char*
const&.
--Matt
next prev parent reply other threads:[~2004-11-22 21:45 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-18 3:50 generalized lvalues Matt Austern
2004-11-18 3:52 ` Andrew Pinski
2004-11-18 4:01 ` Andrew Pinski
2004-11-18 4:18 ` Daniel Berlin
2004-11-18 4:21 ` Andrew Pinski
2004-11-18 4:27 ` Matt Austern
2004-11-18 7:15 ` Joe Buck
2004-11-18 7:37 ` Matt Austern
2004-11-18 13:17 ` Giovanni Bajo
2004-11-18 17:57 ` Joe Buck
2004-11-18 18:28 ` Mike Stump
2004-11-18 18:44 ` Joe Buck
2004-11-19 1:39 ` Mike Stump
2004-11-19 4:52 ` Matt Austern
2004-11-19 22:24 ` Michael Matz
2004-11-19 22:30 ` Robert McNulty Junior
2004-11-20 1:00 ` Ziemowit Laski
2004-11-20 1:20 ` Joe Buck
2004-11-20 1:51 ` Ziemowit Laski
2004-11-20 5:04 ` Joe Buck
2004-11-20 5:17 ` Ziemowit Laski
2004-11-22 20:54 ` generalized lvalues -- patch outline Ziemowit Laski
2004-11-22 21:01 ` Andrew Pinski
2004-11-22 21:11 ` Ziemowit Laski
2004-11-22 21:39 ` Matt Austern
2004-11-22 22:11 ` Joe Buck
2004-11-22 22:12 ` Matt Austern [this message]
2004-11-23 0:06 ` Gabriel Dos Reis
2004-11-23 0:04 ` Gabriel Dos Reis
2004-11-23 0:27 ` Mike Stump
2004-11-24 20:40 ` Kai Henningsen
2004-11-23 0:11 ` Mark Mitchell
2004-11-23 1:19 ` Matt Austern
2004-11-23 1:26 ` Mark Mitchell
2004-11-23 1:32 ` Dale Johannesen
2004-11-23 1:42 ` Mark Mitchell
2004-11-23 1:45 ` Andrew Pinski
2004-11-23 1:55 ` Dale Johannesen
2004-11-23 1:56 ` Andrew Pinski
2004-11-23 2:12 ` Dale Johannesen
2004-11-23 2:10 ` Marcus G. Daniels
2004-11-23 9:43 ` Eric Botcazou
2004-11-23 18:27 ` Aaron W. LaFramboise
2004-11-22 21:23 ` Nathan Sidwell
2004-11-22 22:33 ` Ziemowit Laski
2004-11-23 0:09 ` Gabriel Dos Reis
2004-11-23 9:54 ` Nathan Sidwell
2004-11-23 13:35 ` Michael Matz
2004-11-23 14:56 ` Daniel Berlin
2004-11-23 15:02 ` Michael Matz
2004-11-23 15:15 ` Andrew Pinski
2004-11-23 15:47 ` Michael Matz
2004-11-23 15:56 ` Gabriel Dos Reis
2004-11-23 15:50 ` Steve Naroff
2004-11-23 15:51 ` Gabriel Dos Reis
2004-11-23 16:50 ` Eric Botcazou
2004-11-23 17:01 ` Paul Koning
2004-11-23 17:16 ` Andreas Schwab
2004-11-23 18:03 ` Thomas Kunert
2004-11-23 18:30 ` Nathan Sidwell
2004-11-23 18:57 ` Thomas Kunert
2004-11-23 21:21 ` Paul Koning
2004-11-23 21:52 ` Thomas Kunert
2004-11-23 15:51 ` Gabriel Dos Reis
2004-11-23 16:12 ` Michael Matz
2004-11-23 16:31 ` Richard Guenther
2004-11-23 16:44 ` Andreas Schwab
2004-11-23 20:16 ` Gabriel Dos Reis
2004-11-23 15:01 ` Nathan Sidwell
2004-11-23 15:09 ` Michael Matz
2004-11-23 19:11 ` Matt Austern
2004-11-23 21:10 ` Eric Botcazou
2004-11-23 21:34 ` Ziemowit Laski
2004-11-23 22:09 ` Joseph S. Myers
2004-11-23 22:23 ` Eric Botcazou
2004-11-23 22:27 ` Joseph S. Myers
2004-11-24 0:05 ` Eric Botcazou
2004-11-24 0:07 ` Steven Bosscher
2004-11-24 0:32 ` Joseph S. Myers
2004-11-25 8:41 ` Ian Lance Taylor
2004-11-25 20:41 ` Gabriel Dos Reis
2004-11-25 21:54 ` Matt Austern
2004-11-25 23:27 ` Gabriel Dos Reis
2004-11-29 18:06 ` Joe Buck
2004-11-29 18:57 ` Matt Austern
2004-11-23 23:27 ` Gabriel Dos Reis
2004-11-23 22:24 ` Nathan Sidwell
2004-11-23 0:07 ` Gabriel Dos Reis
2004-11-24 20:43 ` Kai Henningsen
2004-11-24 23:09 ` Gabriel Dos Reis
2004-11-24 23:17 ` Zack Weinberg
2004-11-22 21:31 ` Richard Henderson
2004-11-23 0:11 ` Gabriel Dos Reis
2004-11-23 0:03 ` Jonathan Lennox
2004-11-20 1:40 ` generalized lvalues Joseph S. Myers
2004-11-18 19:11 ` Alex Rosenberg
2004-11-18 4:24 ` Matt Austern
2004-11-18 5:33 ` Dale Johannesen
2004-11-18 17:14 ` Fariborz Jahanian
2004-11-18 18:23 ` Joe Buck
2004-11-19 0:20 ` Ziemowit Laski
2004-11-19 0:40 ` Steven Bosscher
2004-11-19 1:20 ` Joe Buck
2004-11-19 2:00 ` Ziemowit Laski
2004-11-18 23:36 ` Ziemowit Laski
2004-11-18 23:37 ` Matt Austern
2004-11-18 23:49 ` Zack Weinberg
2004-11-19 1:38 ` Ziemowit Laski
2004-11-19 2:52 ` Zack Weinberg
2004-11-19 3:56 ` Ziemowit Laski
2004-11-19 4:22 ` Zack Weinberg
2004-11-19 13:10 ` Nathan Sidwell
2004-11-19 21:58 ` Ziemowit Laski
2004-11-18 23:44 ` Andrew Pinski
2004-11-18 23:45 ` Joe Buck
2004-11-25 4:42 ` Aaron W. LaFramboise
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=C93962D2-3CCF-11D9-8AF3-000A95AA5E5E@apple.com \
--to=austern@apple.com \
--cc=Joe.Buck@synopsys.com \
--cc=gcc@gcc.gnu.org \
--cc=matz@suse.de \
--cc=mrs@apple.com \
--cc=pinskia@physics.uc.edu \
--cc=snaroff@apple.com \
--cc=zlaski@apple.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).