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Changes to grep/manual/html_node/Matching-Control.html,v
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From: |
Jim Meyering |
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Subject: |
Changes to grep/manual/html_node/Matching-Control.html,v |
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Date: |
Sun, 30 Dec 2018 01:24:24 -0500 (EST) |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 18/12/30 01:24:22
Index: html_node/Matching-Control.html
===================================================================
RCS file: /webcvs/grep/grep/manual/html_node/Matching-Control.html,v
retrieving revision 1.28
retrieving revision 1.29
diff -u -b -r1.28 -r1.29
--- html_node/Matching-Control.html 10 Feb 2017 04:43:38 -0000 1.28
+++ html_node/Matching-Control.html 30 Dec 2018 06:24:22 -0000 1.29
@@ -2,7 +2,7 @@
<html>
<!-- This manual is for grep, a pattern matching engine.
-Copyright (C) 1999-2002, 2005, 2008-2017 Free Software Foundation,
+Copyright (C) 1999-2002, 2005, 2008-2018 Free Software Foundation,
Inc.
Permission is granted to copy, distribute and/or modify this document
@@ -11,16 +11,16 @@
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". -->
-<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ -->
+<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
-<title>GNU Grep 3.0: Matching Control</title>
+<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<title>Matching Control (GNU Grep 3.3)</title>
-<meta name="description" content="GNU Grep 3.0: Matching Control">
-<meta name="keywords" content="GNU Grep 3.0: Matching Control">
+<meta name="description" content="Matching Control (GNU Grep 3.3)">
+<meta name="keywords" content="Matching Control (GNU Grep 3.3)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="Index.html#Index" rel="index" title="Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
@@ -70,12 +70,13 @@
<h4 class="subsection">2.1.2 Matching Control</h4>
<dl compact="compact">
-<dt><samp>-e <var>pattern</var></samp></dt>
-<dt><samp>--regexp=<var>pattern</var></samp></dt>
+<dt><samp>-e <var>patterns</var></samp></dt>
+<dt><samp>--regexp=<var>patterns</var></samp></dt>
<dd><a name="index-_002de"></a>
-<a name="index-_002d_002dregexp_003dpattern"></a>
-<a name="index-pattern-list"></a>
-<p>Use <var>pattern</var> as the pattern.
+<a name="index-_002d_002dregexp_003dpatterns"></a>
+<a name="index-patterns-option"></a>
+<p>Use <var>patterns</var> as one or more patterns; newlines within
+<var>patterns</var> separate each pattern from the next.
If this option is used multiple times or is combined with the
<samp>-f</samp> (<samp>--file</samp>) option, search for all patterns given.
(<samp>-e</samp> is specified by POSIX.)
@@ -85,7 +86,7 @@
<dt><samp>--file=<var>file</var></samp></dt>
<dd><a name="index-_002df"></a>
<a name="index-_002d_002dfile"></a>
-<a name="index-pattern-from-file"></a>
+<a name="index-patterns-from-file"></a>
<p>Obtain patterns from <var>file</var>, one per line.
If this option is used multiple times or is combined with the
<samp>-e</samp> (<samp>--regexp</samp>) option, search for all patterns given.
@@ -139,9 +140,16 @@
Similarly,
it must be either at the end of the line
or followed by a non-word constituent character.
-Word-constituent characters are letters, digits, and the underscore.
+Word constituent characters are letters, digits, and the underscore.
This option has no effect if <samp>-x</samp> is also specified.
</p>
+<p>Because the <samp>-w</samp> option can match a substring that does not
+begin and end with word constituents, it differs from surrounding a
+regular expression with ‘<samp>\<</samp>’ and
‘<samp>\></samp>’. For example, although
+‘<samp>grep -w @</samp>’ matches a line containing only
‘<samp>@</samp>’, ‘<samp>grep
+'\<@\>'</samp>’ cannot match any line because
‘<samp>@</samp>’ is not a
+word constituent. See <a
href="The-Backslash-Character-and-Special-Expressions.html#The-Backslash-Character-and-Special-Expressions">The
Backslash Character and Special Expressions</a>.
+</p>
</dd>
<dt><samp>-x</samp></dt>
<dt><samp>--line-regexp</samp></dt>
@@ -149,7 +157,7 @@
<a name="index-_002d_002dline_002dregexp"></a>
<a name="index-match-the-whole-line"></a>
<p>Select only those matches that exactly match the whole line.
-For a regular expression pattern, this is like parenthesizing the
+For regular expression patterns, this is like parenthesizing each
pattern and then surrounding it with ‘<samp>^</samp>’ and
‘<samp>$</samp>’.
(<samp>-x</samp> is specified by POSIX.)
</p>
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