CVSROOT: /webcvs/grep Module name: grep Changes by: Jim Meyering <meyering> 23/03/22 22:55:22
Index: html_node/Basic-vs-Extended.html =================================================================== RCS file: /webcvs/grep/grep/manual/html_node/Basic-vs-Extended.html,v retrieving revision 1.33 retrieving revision 1.34 diff -u -b -r1.33 -r1.34 --- html_node/Basic-vs-Extended.html 3 Sep 2022 19:33:14 -0000 1.33 +++ html_node/Basic-vs-Extended.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>Basic vs Extended (GNU Grep 3.8)</title> +<title>Basic vs Extended (GNU Grep 3.10)</title> -<meta name="description" content="Basic vs Extended (GNU Grep 3.8)"> -<meta name="keywords" content="Basic vs Extended (GNU Grep 3.8)"> +<meta name="description" content="Basic vs Extended (GNU Grep 3.10)"> +<meta name="keywords" content="Basic vs Extended (GNU Grep 3.10)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> @@ -31,21 +31,9 @@ <link href="Back_002dreferences-and-Subexpressions.html" rel="prev" title="Back-references and Subexpressions"> <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} +ul.mark-bullet {list-style-type: disc} --> </style> <link rel="stylesheet" type="text/css" href="https://www.gnu.org/software/gnulib/manual.css";> @@ -54,37 +42,37 @@ </head> <body lang="en"> -<div class="section" id="Basic-vs-Extended"> -<div class="header"> +<div class="section-level-extent" id="Basic-vs-Extended"> +<div class="nav-panel"> <p> Next: <a href="Problematic-Expressions.html" accesskey="n" rel="next">Problematic Regular Expressions</a>, Previous: <a href="Back_002dreferences-and-Subexpressions.html" accesskey="p" rel="prev">Back-references and Subexpressions</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="Basic-vs-Extended-Regular-Expressions"></span><h3 class="section">3.6 Basic vs Extended Regular Expressions</h3> -<span id="index-basic-regular-expressions"></span> +<h3 class="section" id="Basic-vs-Extended-Regular-Expressions"><span>3.6 Basic vs Extended Regular Expressions<a class="copiable-link" href="#Basic-vs-Extended-Regular-Expressions"> ¶</a></span></h3> +<a class="index-entry-id" id="index-basic-regular-expressions"></a> <p>Basic regular expressions differ from extended regular expressions in the following ways: </p> -<ul> -<li> The characters ‘<samp>?</samp>’, ‘<samp>+</samp>’, -‘<samp>{</samp>’, ‘<samp>|</samp>’, ‘<samp>(</samp>’, and ‘<samp>)</samp>’ lose their special meaning; -instead use the backslashed versions ‘<samp>\?</samp>’, ‘<samp>\+</samp>’, ‘<samp>\{</samp>’, -‘<samp>\|</samp>’, ‘<samp>\(</samp>’, and ‘<samp>\)</samp>’. Also, a backslash is needed -before an interval expression’s closing ‘<samp>}</samp>’. +<ul class="itemize mark-bullet"> +<li>The characters ‘<samp class="samp">?</samp>’, ‘<samp class="samp">+</samp>’, +‘<samp class="samp">{</samp>’, ‘<samp class="samp">|</samp>’, ‘<samp class="samp">(</samp>’, and ‘<samp class="samp">)</samp>’ lose their special meaning; +instead use the backslashed versions ‘<samp class="samp">\?</samp>’, ‘<samp class="samp">\+</samp>’, ‘<samp class="samp">\{</samp>’, +‘<samp class="samp">\|</samp>’, ‘<samp class="samp">\(</samp>’, and ‘<samp class="samp">\)</samp>’. Also, a backslash is needed +before an interval expression’s closing ‘<samp class="samp">}</samp>’. -</li><li> An unmatched ‘<samp>\)</samp>’ is invalid. +</li><li>An unmatched ‘<samp class="samp">\)</samp>’ is invalid. -</li><li> If an unescaped ‘<samp>^</samp>’ appears neither first, nor directly after -‘<samp>\(</samp>’ or ‘<samp>\|</samp>’, it is treated like an ordinary character and +</li><li>If an unescaped ‘<samp class="samp">^</samp>’ appears neither first, nor directly after +‘<samp class="samp">\(</samp>’ or ‘<samp class="samp">\|</samp>’, it is treated like an ordinary character and is not an anchor. -</li><li> If an unescaped ‘<samp>$</samp>’ appears neither last, nor directly before -‘<samp>\|</samp>’ or ‘<samp>\)</samp>’, it is treated like an ordinary character and +</li><li>If an unescaped ‘<samp class="samp">$</samp>’ appears neither last, nor directly before +‘<samp class="samp">\|</samp>’ or ‘<samp class="samp">\)</samp>’, it is treated like an ordinary character and is not an anchor. -</li><li> If an unescaped ‘<samp>*</samp>’ appears first, or appears directly after -‘<samp>\(</samp>’ or ‘<samp>\|</samp>’ or anchoring ‘<samp>^</samp>’, it is treated like an +</li><li>If an unescaped ‘<samp class="samp">*</samp>’ appears first, or appears directly after +‘<samp class="samp">\(</samp>’ or ‘<samp class="samp">\|</samp>’ or anchoring ‘<samp class="samp">^</samp>’, it is treated like an ordinary character and is not a repetition operator. </li></ul>
