From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: Explicit casts in ctype.h suppress compiler warnings
Date: Fri, 17 Apr 2015 16:21:26 -0400 [thread overview]
Message-ID: <20150417202126.GD6817@brightrain.aerifal.cx> (raw)
In-Reply-To: <20150417194323.GK2875@port70.net>
On Fri, Apr 17, 2015 at 09:43:24PM +0200, Szabolcs Nagy wrote:
> * Szabolcs Nagy <nsz@port70.net> [2015-04-17 20:35:12 +0200]:
> > > I admit I was thinking of doing isspace-style inlines everywhere, but thanks
> > > to your suggestion I was able to come up with this:
> > >
> > > static __inline void __is_int(int a) {}
> > > #define isdigit(a) (__is_int(0?(a):0), ((unsigned)(a)-'0') < 10)
> > >
> >
> > i think using :0 there is not useful because null
> > pointer constants are special in ?:
> >
>
> ah i see what you are doing there now
Yes, this is exactly the type of thing I hoped could be done.
> meanwhile i tested that (__extension__ (unsigned){a})
> is accepted without warning in c89 mode
Try again with -pedantic.
Rich
next prev parent reply other threads:[~2015-04-17 20:21 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-17 10:59 Alexander Monakov
2015-04-17 16:49 ` Jens Gustedt
2015-04-17 16:52 ` Rich Felker
2015-04-17 18:24 ` Alexander Monakov
2015-04-17 18:35 ` Szabolcs Nagy
2015-04-17 19:43 ` Szabolcs Nagy
2015-04-17 20:21 ` Rich Felker [this message]
2015-04-17 20:32 ` Szabolcs Nagy
2015-04-17 20:34 ` Jens Gustedt
2015-04-17 21:36 ` Rich Felker
2015-04-18 2:03 ` Morten Welinder
2015-04-17 19:33 ` William Ahern
2015-04-17 16:50 ` Rich Felker
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=20150417202126.GD6817@brightrain.aerifal.cx \
--to=dalias@libc.org \
--cc=musl@lists.openwall.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.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
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 NNTP newsgroup(s).