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Changes to grep/manual/html_node/Character-Classes-and-Bracket-Expressio
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From: |
Jim Meyering |
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Subject: |
Changes to grep/manual/html_node/Character-Classes-and-Bracket-Expressions.html, v |
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Date: |
Tue, 21 Sep 2010 06:07:09 +0000 |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 10/09/21 06:07:07
Index: html_node/Character-Classes-and-Bracket-Expressions.html
===================================================================
RCS file:
/webcvs/grep/grep/manual/html_node/Character-Classes-and-Bracket-Expressions.html,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -b -r1.5 -r1.6
--- html_node/Character-Classes-and-Bracket-Expressions.html 2 Apr 2010
10:26:53 -0000 1.5
+++ html_node/Character-Classes-and-Bracket-Expressions.html 21 Sep 2010
06:07:06 -0000 1.6
@@ -1,8 +1,8 @@
<html lang="en">
<head>
-<title>Character Classes and Bracket Expressions - GNU Grep 2.6.3</title>
+<title>Character Classes and Bracket Expressions - GNU Grep 2.7</title>
<meta http-equiv="Content-Type" content="text/html">
-<meta name="description" content="GNU Grep 2.6.3">
+<meta name="description" content="GNU Grep 2.7">
<meta name="generator" content="makeinfo 4.13">
<link title="Top" rel="start" href="index.html#Top">
<link rel="up" href="Regular-Expressions.html#Regular-Expressions"
title="Regular Expressions">
@@ -109,6 +109,7 @@
<br><dt>‘<samp><span
class="samp">[:space:]</span></samp>’<dd><a
name="index-space-_0040r_007bcharacter-class_007d-231"></a><a
name="index-space-characters-232"></a><a
name="index-whitespace-characters-233"></a>Space characters:
tab, newline, vertical tab, form feed, carriage return, and space.
+See <a href="Usage.html#Usage">Usage</a>, for more discussion of matching
newlines.
<br><dt>‘<samp><span
class="samp">[:upper:]</span></samp>’<dd><a
name="index-upper-_0040r_007bcharacter-class_007d-234"></a><a
name="index-upper_002dcase-letters-235"></a>Upper-case letters:
<code>A B C D E F G H I J K L M N O P Q R S T U V W X Y Z</code>.
@@ -124,6 +125,12 @@
part of the symbolic names, and must be included in addition to
the brackets delimiting the bracket expression.)
+ <p><a name="invalid_002dbracket_002dexpr"></a>If you mistakenly omit the
outer brackets, and search for say, ‘<samp><span
class="samp">[:upper:]</span></samp>’,
+GNU <samp><span class="command">grep</span></samp> prints a diagnostic and
exits with status 2, on
+the assumption that you did not intend to search for the nominally
+equivalent regular expression: ‘<samp><span
class="samp">[:epru]</span></samp>’.
+Set the <code>POSIXLY_CORRECT</code> environment variable to disable this
feature.
+
<p>Most meta-characters lose their special meaning inside bracket
expressions.
<dl>
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