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Changes to grep/manual/html_node/Special-Backslash-Expressions.html, v
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From: |
Jim Meyering |
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Subject: |
Changes to grep/manual/html_node/Special-Backslash-Expressions.html, v |
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Date: |
Wed, 22 Mar 2023 22:55:26 -0400 (EDT) |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 23/03/22 22:55:22
Index: html_node/Special-Backslash-Expressions.html
===================================================================
RCS file:
/webcvs/grep/grep/manual/html_node/Special-Backslash-Expressions.html,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -b -r1.1 -r1.2
--- html_node/Special-Backslash-Expressions.html 3 Sep 2022 19:33:14
-0000 1.1
+++ html_node/Special-Backslash-Expressions.html 23 Mar 2023 02:55:21
-0000 1.2
@@ -1,11 +1,11 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd";>
+<!DOCTYPE html>
<html>
-<!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 7.0dev, https://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<!-- This manual is for grep, a pattern matching engine.
-Copyright (C) 1999-2002, 2005, 2008-2022 Free Software Foundation,
+Copyright © 1999-2002, 2005, 2008-2023 Free Software Foundation,
Inc.
Permission is granted to copy, distribute and/or modify this document
@@ -14,10 +14,10 @@
Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
Texts. A copy of the license is included in the section entitled
"GNU Free Documentation License". -->
-<title>Special Backslash Expressions (GNU Grep 3.8)</title>
+<title>Special Backslash Expressions (GNU Grep 3.10)</title>
-<meta name="description" content="Special Backslash Expressions (GNU Grep
3.8)">
-<meta name="keywords" content="Special Backslash Expressions (GNU Grep 3.8)">
+<meta name="description" content="Special Backslash Expressions (GNU Grep
3.10)">
+<meta name="keywords" content="Special Backslash Expressions (GNU Grep 3.10)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
@@ -31,21 +31,8 @@
<link href="Character-Classes-and-Bracket-Expressions.html" rel="prev"
title="Character Classes and Bracket Expressions">
<style type="text/css">
<!--
-a.copiable-anchor {visibility: hidden; text-decoration: none; line-height: 0em}
-a.summary-letter {text-decoration: none}
-blockquote.indentedblock {margin-right: 0em}
-div.display {margin-left: 3.2em}
-div.example {margin-left: 3.2em}
-kbd {font-style: oblique}
-pre.display {font-family: inherit}
-pre.format {font-family: inherit}
-pre.menu-comment {font-family: serif}
-pre.menu-preformatted {font-family: serif}
-span.nolinebreak {white-space: nowrap}
-span.roman {font-family: initial; font-weight: normal}
-span.sansserif {font-family: sans-serif; font-weight: normal}
-span:hover a.copiable-anchor {visibility: visible}
-ul.no-bullet {list-style: none}
+a.copiable-link {visibility: hidden; text-decoration: none; line-height: 0em}
+span:hover a.copiable-link {visibility: visible}
-->
</style>
<link rel="stylesheet" type="text/css"
href="https://www.gnu.org/software/gnulib/manual.css";>
@@ -54,70 +41,70 @@
</head>
<body lang="en">
-<div class="section" id="Special-Backslash-Expressions">
-<div class="header">
+<div class="section-level-extent" id="Special-Backslash-Expressions">
+<div class="nav-panel">
<p>
Next: <a href="Anchoring.html" accesskey="n" rel="next">Anchoring</a>,
Previous: <a href="Character-Classes-and-Bracket-Expressions.html"
accesskey="p" rel="prev">Character Classes and Bracket Expressions</a>, Up: <a
href="Regular-Expressions.html" accesskey="u" rel="up">Regular Expressions</a>
[<a href="index.html#SEC_Contents" title="Table of contents"
rel="contents">Contents</a>][<a href="Index.html" title="Index"
rel="index">Index</a>]</p>
</div>
<hr>
-<span id="Special-Backslash-Expressions-1"></span><h3 class="section">3.3
Special Backslash Expressions</h3>
-<span id="index-backslash"></span>
+<h3 class="section" id="Special-Backslash-Expressions-1"><span>3.3 Special
Backslash Expressions<a class="copiable-link"
href="#Special-Backslash-Expressions-1"> ¶</a></span></h3>
+<a class="index-entry-id" id="index-backslash"></a>
-<p>The ‘<samp>\</samp>’ character followed by a special character
is a regular
+<p>The ‘<samp class="samp">\</samp>’ character followed by a
special character is a regular
expression that matches the special character.
-The ‘<samp>\</samp>’ character,
+The ‘<samp class="samp">\</samp>’ character,
when followed by certain ordinary characters,
takes a special meaning:
</p>
-<dl compact="compact">
-<dt><span>‘<samp>\b</samp>’</span></dt>
+<dl class="table">
+<dt>‘<samp class="samp">\b</samp>’</dt>
<dd><p>Match the empty string at the edge of a word.
</p>
</dd>
-<dt><span>‘<samp>\B</samp>’</span></dt>
+<dt>‘<samp class="samp">\B</samp>’</dt>
<dd><p>Match the empty string provided it’s not at the edge of a word.
</p>
</dd>
-<dt><span>‘<samp>\<</samp>’</span></dt>
+<dt>‘<samp class="samp">\<</samp>’</dt>
<dd><p>Match the empty string at the beginning of a word.
</p>
</dd>
-<dt><span>‘<samp>\></samp>’</span></dt>
+<dt>‘<samp class="samp">\></samp>’</dt>
<dd><p>Match the empty string at the end of a word.
</p>
</dd>
-<dt><span>‘<samp>\w</samp>’</span></dt>
-<dd><p>Match word constituent, it is a synonym for
‘<samp>[_[:alnum:]]</samp>’.
+<dt>‘<samp class="samp">\w</samp>’</dt>
+<dd><p>Match word constituent, it is a synonym for ‘<samp
class="samp">[_[:alnum:]]</samp>’.
</p>
</dd>
-<dt><span>‘<samp>\W</samp>’</span></dt>
-<dd><p>Match non-word constituent, it is a synonym for
‘<samp>[^_[:alnum:]]</samp>’.
+<dt>‘<samp class="samp">\W</samp>’</dt>
+<dd><p>Match non-word constituent, it is a synonym for ‘<samp
class="samp">[^_[:alnum:]]</samp>’.
</p>
</dd>
-<dt><span>‘<samp>\s</samp>’</span></dt>
-<dd><p>Match whitespace, it is a synonym for
‘<samp>[[:space:]]</samp>’.
+<dt>‘<samp class="samp">\s</samp>’</dt>
+<dd><p>Match whitespace, it is a synonym for ‘<samp
class="samp">[[:space:]]</samp>’.
</p>
</dd>
-<dt><span>‘<samp>\S</samp>’</span></dt>
-<dd><p>Match non-whitespace, it is a synonym for
‘<samp>[^[:space:]]</samp>’.
+<dt>‘<samp class="samp">\S</samp>’</dt>
+<dd><p>Match non-whitespace, it is a synonym for ‘<samp
class="samp">[^[:space:]]</samp>’.
</p>
</dd>
-<dt><span>‘<samp>\]</samp>’</span></dt>
-<dd><p>Match ‘<samp>]</samp>’.
+<dt>‘<samp class="samp">\]</samp>’</dt>
+<dd><p>Match ‘<samp class="samp">]</samp>’.
</p>
</dd>
-<dt><span>‘<samp>\}</samp>’</span></dt>
-<dd><p>Match ‘<samp>}</samp>’.
+<dt>‘<samp class="samp">\}</samp>’</dt>
+<dd><p>Match ‘<samp class="samp">}</samp>’.
</p>
</dd>
</dl>
-<p>For example, ‘<samp>\brat\b</samp>’ matches the separate word
‘<samp>rat</samp>’,
-‘<samp>\Brat\B</samp>’ matches ‘<samp>crate</samp>’
but not ‘<samp>furry rat</samp>’.
+<p>For example, ‘<samp class="samp">\brat\b</samp>’ matches the
separate word ‘<samp class="samp">rat</samp>’,
+‘<samp class="samp">\Brat\B</samp>’ matches ‘<samp
class="samp">crate</samp>’ but not ‘<samp class="samp">furry
rat</samp>’.
</p>
-<p>The behavior of <code>grep</code> is unspecified if a unescaped backslash
+<p>The behavior of <code class="command">grep</code> is unspecified if a
unescaped backslash
is not followed by a special character, a nonzero digit, or a
-character in the above list. Although <code>grep</code> might issue a
+character in the above list. Although <code class="command">grep</code> might
issue a
diagnostic and/or give the backslash an interpretation now, its
behavior may change if the syntax of regular expressions is extended
in future versions.
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