1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Regular Expression Syntax</title> 5<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../index.html" title="Boost.Regex 5.1.4"> 8<link rel="up" href="../index.html" title="Boost.Regex 5.1.4"> 9<link rel="prev" href="partial_matches.html" title="Partial Matches"> 10<link rel="next" href="syntax/perl_syntax.html" title="Perl Regular Expression Syntax"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="partial_matches.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="syntax/perl_syntax.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h2 class="title" style="clear: both"> 27<a name="boost_regex.syntax"></a><a class="link" href="syntax.html" title="Regular Expression Syntax">Regular Expression Syntax</a> 28</h2></div></div></div> 29<div class="toc"><dl class="toc"> 30<dt><span class="section"><a href="syntax/perl_syntax.html">Perl Regular Expression 31 Syntax</a></span></dt> 32<dt><span class="section"><a href="syntax/basic_extended.html">POSIX Extended Regular 33 Expression Syntax</a></span></dt> 34<dt><span class="section"><a href="syntax/basic_syntax.html">POSIX Basic Regular 35 Expression Syntax</a></span></dt> 36<dt><span class="section"><a href="syntax/character_classes.html">Character Class 37 Names</a></span></dt> 38<dd><dl> 39<dt><span class="section"><a href="syntax/character_classes/std_char_classes.html">Character 40 Classes that are Always Supported</a></span></dt> 41<dt><span class="section"><a href="syntax/character_classes/optional_char_class_names.html">Character 42 classes that are supported by Unicode Regular Expressions</a></span></dt> 43</dl></dd> 44<dt><span class="section"><a href="syntax/collating_names.html">Collating Names</a></span></dt> 45<dd><dl> 46<dt><span class="section"><a href="syntax/collating_names/digraphs.html">Digraphs</a></span></dt> 47<dt><span class="section"><a href="syntax/collating_names/posix_symbolic_names.html">POSIX 48 Symbolic Names</a></span></dt> 49<dt><span class="section"><a href="syntax/collating_names/named_unicode.html">Named 50 Unicode Characters</a></span></dt> 51</dl></dd> 52<dt><span class="section"><a href="syntax/leftmost_longest_rule.html">The Leftmost 53 Longest Rule</a></span></dt> 54</dl></div> 55<p> 56 This section covers the regular expression syntax used by this library, this 57 is a programmers guide, the actual syntax presented to your program's users 58 will depend upon the flags used during expression compilation. 59 </p> 60<p> 61 There are three main syntax options available, depending upon how you construct 62 the regular expression object: 63 </p> 64<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 65<li class="listitem"> 66 <a class="link" href="syntax/perl_syntax.html" title="Perl Regular Expression Syntax">Perl (this is the default 67 behavior)</a>. 68 </li> 69<li class="listitem"> 70 <a class="link" href="syntax/basic_extended.html" title="POSIX Extended Regular Expression Syntax">POSIX extended (including 71 the egrep and awk variations)</a>. 72 </li> 73<li class="listitem"> 74 <a class="link" href="syntax/basic_syntax.html" title="POSIX Basic Regular Expression Syntax">POSIX Basic (including 75 the grep and emacs variations)</a>. 76 </li> 77</ul></div> 78<p> 79 You can also construct a regular expression that treats every character as 80 a literal, but that's not really a "syntax"! 81 </p> 82</div> 83<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 84<td align="left"></td> 85<td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p> 86 Distributed under the Boost Software License, Version 1.0. (See accompanying 87 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 88 </p> 89</div></td> 90</tr></table> 91<hr> 92<div class="spirit-nav"> 93<a accesskey="p" href="partial_matches.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../index.html"><img src="../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="syntax/perl_syntax.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 94</div> 95</body> 96</html> 97
