Date: Wed, 11 Feb 1998 01:46:29 +0100 (CET) From: Oliver Fromme <oliver.fromme@heim3.tu-clausthal.de> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: docs/5708: Small bug in re_format(7) manual page. Message-ID: <199802110046.BAA21304@dorifer.heim3.tu-clausthal.de>
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>Number: 5708
>Category: docs
>Synopsis: Small bug in re_format(7) manual page.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: doc-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 10 16:50:00 PST 1998
>Last-Modified:
>Originator: Oliver Fromme
>Organization:
Administration Heim 3 (Technical University of Clausthal)
>Release: FreeBSD 2.2-971223-SNAP i386
>Environment:
`uname -a`:
FreeBSD dorifer.heim3.tu-clausthal.de 2.2-971223-SNAP
FreeBSD 2.2-971223-SNAP #0: Sun Feb 1 16:24:13 CET 1998
olli@dorifer.heim3.tu-clausthal.de:/usr/src/sys/compile/DORIFER i386
>Description:
According to the re_format() manual page:
Obsolete (``basic'') regular expressions differ in several
respects. `|', `+', and `?' are ordinary characters and
there is no equivalent for their functionality.
This is not completely correct. `x+' is equivalent to `xx*' or
`x\{1,\}', and `x?' is equivalent to `x\{0,1\}'.
>How-To-Repeat:
Enter "man 7 re_format".
>Fix:
--- re_format.7.orig Wed Feb 11 01:32:32 1998
+++ re_format.7 Wed Feb 11 01:41:15 1998
@@ -222,8 +222,12 @@
POSIX-compliant.
.PP
Obsolete (``basic'') regular expressions differ in several respects.
-`|', `+', and `?' are ordinary characters and there is no equivalent
-for their functionality.
+`|' is an ordinary character and there is no equivalent
+for its functionality.
+`+' and `?' are ordinary characters, and their functionality
+can be expressed using bounds (`\{1,\}' or `\{0,1\}',
+respectively).
+Also note that `x+' in modern REs is equivalent to `xx*'.
The delimiters for bounds are `\e{' and `\e}',
with `{' and `}' by themselves ordinary characters.
The parentheses for nested subexpressions are `\e(' and `\e)',
>Audit-Trail:
>Unformatted:
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