From: "Andreas Vögele" <voegelas@gmx.net>
Subject: Re: empty regular expressions don't work on the BSDs
Date: Sun, 30 May 2004 10:07:05 +0200 [thread overview]
Message-ID: <5710518A-B210-11D8-B494-000D93673682@gmx.net> (raw)
In-Reply-To: <87pt8mlw06.fsf@zip.com.au>
Kevin Ryde writes:
>> Another option would be to handle empty REs in string-match.
>
> I think it could follow the libc, as long as it doesn't crash.
Yes. In practice empty regular expression aren't common anyway.
Henry Spencer's regcomp doesn't crash if the regular expression is
empty. Instead the error code REG_EMPTY is returned. POSIX doesn't
define REG_EMPTY but the RE grammar presented in the POSIX
specification doesn't seem to allow empty REs either. See
http://www.opengroup.org/onlinepubs/009695399/basedefs/
xbd_chap09.html#tag_09_05
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prev parent reply other threads:[~2004-05-30 8:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-28 20:28 empty regular expressions don't work on the BSDs Andreas Vögele
2004-05-29 22:16 ` Kevin Ryde
2004-05-30 8:07 ` Andreas Vögele [this message]
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