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Changes to grep/manual/html_node/Fundamental-Structure.html,v
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From: |
Jim Meyering |
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Subject: |
Changes to grep/manual/html_node/Fundamental-Structure.html,v |
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Date: |
Wed, 22 Mar 2023 22:55:25 -0400 (EDT) |
CVSROOT: /webcvs/grep
Module name: grep
Changes by: Jim Meyering <meyering> 23/03/22 22:55:22
Index: html_node/Fundamental-Structure.html
===================================================================
RCS file: /webcvs/grep/grep/manual/html_node/Fundamental-Structure.html,v
retrieving revision 1.33
retrieving revision 1.34
diff -u -b -r1.33 -r1.34
--- html_node/Fundamental-Structure.html 3 Sep 2022 19:33:14 -0000
1.33
+++ html_node/Fundamental-Structure.html 23 Mar 2023 02:55:21 -0000
1.34
@@ -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>Fundamental Structure (GNU Grep 3.8)</title>
+<title>Fundamental Structure (GNU Grep 3.10)</title>
-<meta name="description" content="Fundamental Structure (GNU Grep 3.8)">
-<meta name="keywords" content="Fundamental Structure (GNU Grep 3.8)">
+<meta name="description" content="Fundamental Structure (GNU Grep 3.10)">
+<meta name="keywords" content="Fundamental Structure (GNU Grep 3.10)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
@@ -30,21 +30,8 @@
<link href="Character-Classes-and-Bracket-Expressions.html" rel="next"
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";>
@@ -53,75 +40,82 @@
</head>
<body lang="en">
-<div class="section" id="Fundamental-Structure">
-<div class="header">
+<div class="section-level-extent" id="Fundamental-Structure">
+<div class="nav-panel">
<p>
Next: <a href="Character-Classes-and-Bracket-Expressions.html" accesskey="n"
rel="next">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="Fundamental-Structure-1"></span><h3 class="section">3.1 Fundamental
Structure</h3>
+<h3 class="section" id="Fundamental-Structure-1"><span>3.1 Fundamental
Structure<a class="copiable-link" href="#Fundamental-Structure-1">
¶</a></span></h3>
-<span id="index-ordinary-characters"></span>
-<span id="index-special-characters"></span>
-<p>In regular expressions, the characters
‘<samp>.?*+{|()[\^$</samp>’ are
-<em>special characters</em> and have uses described below. All other
-characters are <em>ordinary characters</em>, and each ordinary character
+<a class="index-entry-id" id="index-ordinary-characters"></a>
+<a class="index-entry-id" id="index-special-characters"></a>
+<p>In regular expressions, the characters ‘<samp
class="samp">.?*+{|()[\^$</samp>’ are
+<em class="dfn">special characters</em> and have uses described below. All
other
+characters are <em class="dfn">ordinary characters</em>, and each ordinary
character
is a regular expression that matches itself.
</p>
-<span id="index-_002e"></span>
-<span id="index-dot"></span>
-<span id="index-period"></span>
-<p>The period ‘<samp>.</samp>’ matches any single character.
-It is unspecified whether ‘<samp>.</samp>’ matches an encoding
error.
+<a class="index-entry-id" id="index-_002e"></a>
+<a class="index-entry-id" id="index-dot"></a>
+<a class="index-entry-id" id="index-period"></a>
+<p>The period ‘<samp class="samp">.</samp>’ matches any single
character.
+It is unspecified whether ‘<samp class="samp">.</samp>’ matches an
encoding error.
</p>
-<span id="index-interval-expressions"></span>
+<a class="index-entry-id" id="index-interval-expressions"></a>
<p>A regular expression may be followed by one of several
-repetition operators; the operators beginning with ‘<samp>{</samp>’
-are called <em>interval expressions</em>.
+repetition operators; the operators beginning with ‘<samp
class="samp">{</samp>’
+are called <em class="dfn">interval expressions</em>.
</p>
-<dl compact="compact">
-<dt id='index-_003f'><span>‘<samp>?</samp>’<a href='#index-_003f'
class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-question-mark"></span>
-<span id="index-match-expression-at-most-once"></span>
+<dl class="table">
+<dt>‘<samp class="samp">?</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_003f"></a>
+<a class="index-entry-id" id="index-question-mark"></a>
+<a class="index-entry-id" id="index-match-expression-at-most-once"></a>
<p>The preceding item is optional and is matched at most once.
</p>
</dd>
-<dt id='index-_002a'><span>‘<samp>*</samp>’<a href='#index-_002a'
class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-asterisk"></span>
-<span id="index-match-expression-zero-or-more-times"></span>
+<dt>‘<samp class="samp">*</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_002a"></a>
+<a class="index-entry-id" id="index-asterisk"></a>
+<a class="index-entry-id" id="index-match-expression-zero-or-more-times"></a>
<p>The preceding item is matched zero or more times.
</p>
</dd>
-<dt id='index-_002b'><span>‘<samp>+</samp>’<a href='#index-_002b'
class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-plus-sign"></span>
-<span id="index-match-expression-one-or-more-times"></span>
+<dt>‘<samp class="samp">+</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_002b"></a>
+<a class="index-entry-id" id="index-plus-sign"></a>
+<a class="index-entry-id" id="index-match-expression-one-or-more-times"></a>
<p>The preceding item is matched one or more times.
</p>
</dd>
-<dt id='index-_007bn_007d'><span>‘<samp>{<var>n</var>}</samp>’<a
href='#index-_007bn_007d' class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-braces_002c-one-argument"></span>
-<span id="index-match-expression-n-times"></span>
-<p>The preceding item is matched exactly <var>n</var> times.
-</p>
-</dd>
-<dt
id='index-_007bn_002c_007d'><span>‘<samp>{<var>n</var>,}</samp>’<a
href='#index-_007bn_002c_007d' class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-braces_002c-second-argument-omitted"></span>
-<span id="index-match-expression-n-or-more-times"></span>
-<p>The preceding item is matched <var>n</var> or more times.
-</p>
-</dd>
-<dt
id='index-_007b_002cm_007d'><span>‘<samp>{,<var>m</var>}</samp>’<a
href='#index-_007b_002cm_007d' class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-braces_002c-first-argument-omitted"></span>
-<span id="index-match-expression-at-most-m-times"></span>
-<p>The preceding item is matched at most <var>m</var> times.
+<dt>‘<samp class="samp">{<var class="var">n</var>}</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_007bn_007d"></a>
+<a class="index-entry-id" id="index-braces_002c-one-argument"></a>
+<a class="index-entry-id" id="index-match-expression-n-times"></a>
+<p>The preceding item is matched exactly <var class="var">n</var> times.
+</p>
+</dd>
+<dt>‘<samp class="samp">{<var class="var">n</var>,}</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_007bn_002c_007d"></a>
+<a class="index-entry-id" id="index-braces_002c-second-argument-omitted"></a>
+<a class="index-entry-id" id="index-match-expression-n-or-more-times"></a>
+<p>The preceding item is matched <var class="var">n</var> or more times.
+</p>
+</dd>
+<dt>‘<samp class="samp">{,<var class="var">m</var>}</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_007b_002cm_007d"></a>
+<a class="index-entry-id" id="index-braces_002c-first-argument-omitted"></a>
+<a class="index-entry-id" id="index-match-expression-at-most-m-times"></a>
+<p>The preceding item is matched at most <var class="var">m</var> times.
This is a GNU extension.
</p>
</dd>
-<dt
id='index-_007bn_002cm_007d'><span>‘<samp>{<var>n</var>,<var>m</var>}</samp>’<a
href='#index-_007bn_002cm_007d' class='copiable-anchor'> ¶</a></span></dt>
-<dd><span id="index-braces_002c-two-arguments"></span>
-<span id="index-match-expression-from-n-to-m-times"></span>
-<p>The preceding item is matched at least <var>n</var> times, but not more than
-<var>m</var> times.
+<dt>‘<samp class="samp">{<var class="var">n</var>,<var
class="var">m</var>}</samp>’</dt>
+<dd><a class="index-entry-id" id="index-_007bn_002cm_007d"></a>
+<a class="index-entry-id" id="index-braces_002c-two-arguments"></a>
+<a class="index-entry-id" id="index-match-expression-from-n-to-m-times"></a>
+<p>The preceding item is matched at least <var class="var">n</var> times, but
not more than
+<var class="var">m</var> times.
</p>
</dd>
</dl>
@@ -132,23 +126,23 @@
matches any string formed by concatenating two substrings
that respectively match the concatenated expressions.
</p>
-<span id="index-alternatives-in-regular-expressions"></span>
-<p>Two regular expressions may be joined by the infix operator
‘<samp>|</samp>’.
+<a class="index-entry-id" id="index-alternatives-in-regular-expressions"></a>
+<p>Two regular expressions may be joined by the infix operator ‘<samp
class="samp">|</samp>’.
The resulting regular expression matches any string matching either of
-the two expressions, which are called <em>alternatives</em>.
+the two expressions, which are called <em class="dfn">alternatives</em>.
</p>
<p>Repetition takes precedence over concatenation,
which in turn takes precedence over alternation.
A whole expression may be enclosed in parentheses
to override these precedence rules and form a subexpression.
-An unmatched ‘<samp>)</samp>’ matches just itself.
+An unmatched ‘<samp class="samp">)</samp>’ matches just itself.
</p>
<p>Not every character string is a valid regular expression.
-See <a href="Problematic-Expressions.html">Problematic Regular Expressions</a>.
+See <a class="xref" href="Problematic-Expressions.html">Problematic Regular
Expressions</a>.
</p>
</div>
<hr>
-<div class="header">
+<div class="nav-panel">
<p>
Next: <a href="Character-Classes-and-Bracket-Expressions.html">Character
Classes and Bracket Expressions</a>, Up: <a
href="Regular-Expressions.html">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>
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