From bf6c69c999f2b204c8084db33c9d1a8913b59bba Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Wed, 11 May 2005 16:06:19 +0000
Subject: [PATCH] Vincent Fourmond / Joey (Martin) Schulze Removed discussion
 of `[[:<:]]' and `[[:>:]]' since they do not seem to be in the glibc
 implementation. As per
 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=295666

>   The regex.7.gz mentions that [[:>:]] and [[:<:]] are available to designate word boundaries.
> However, neither grep nor sed, which are build on the standard libc regcomp do recognise this syntax.
> Moreover, the small program here
>
> #include <regex.h>
> #include <sys/types.h>
> #include <iostream>
>
> using namespace std;
>
> int main()
> {
>   regex_t RE;
>   int err_code = regcomp(&RE, "[[:<:]]",
>              REG_EXTENDED);
>   char Buffer[100];
>   if(err_code) {
>     regerror(err_code, &RE, Buffer, 100);
>     cerr << "Error : " << Buffer << endl;
>   }
> }
>
>
> produces the following error message:
>
> Error : Invalid character class name
---
 man7/regex.7 | 40 +++++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 17 deletions(-)

diff --git a/man7/regex.7 b/man7/regex.7
index 9a87d31d3..0167e7bc0 100644
--- a/man7/regex.7
+++ b/man7/regex.7
@@ -26,6 +26,10 @@
 .\" I added an AUTHOR paragraph below - aeb.
 .\"
 .\" In the default nroff environment there is no dagger \(dg.
+.\"
+.\" 2005-05-11 Removed discussion of `[[:<:]]' and `[[:>:]]', which
+.\" 	appear not to be in the glibc implementation of regcomp
+.\"
 .ie t .ds dg \(dg
 .el .ds dg (!)
 .TH REGEX 7 1994-02-07 
@@ -157,23 +161,25 @@ These stand for the character classes defined in
 .BR wctype (3).
 A locale may provide others.
 A character class may not be used as an endpoint of a range.
-.PP
-There are two special cases\*(dg of bracket expressions:
-the bracket expressions `[[:<:]]' and `[[:>:]]' match the null string at
-the beginning and end of a word respectively.
-A word is defined as a sequence of
-word characters
-which is neither preceded nor followed by
-word characters.
-A word character is an
-.I alnum
-character (as defined by
-.BR wctype (3))
-or an underscore.
-This is an extension,
-compatible with but not specified by POSIX 1003.2,
-and should be used with
-caution in software intended to be portable to other systems.
+.\" As per http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=295666
+.\" The following does not seem to apply in the glibc implementation
+.\" .PP
+.\" There are two special cases\*(dg of bracket expressions:
+.\" the bracket expressions `[[:<:]]' and `[[:>:]]' match the null string at
+.\" the beginning and end of a word respectively.
+.\" A word is defined as a sequence of
+.\" word characters
+.\" which is neither preceded nor followed by
+.\" word characters.
+.\" A word character is an
+.\" .I alnum
+.\" character (as defined by
+.\" .BR wctype (3))
+.\" or an underscore.
+.\" This is an extension,
+.\" compatible with but not specified by POSIX 1003.2,
+.\" and should be used with
+.\" caution in software intended to be portable to other systems.
 .PP
 In the event that an RE could match more than one substring of a given
 string,