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Date: Wed, 11 Feb 1998 01:46:29 +0100 (CET)
From: Oliver Fromme <oliver.fromme@heim3.tu-clausthal.de>
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Subject: docs/5708: Small bug in re_format(7) manual page.
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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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