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| 4 | <title>Boost.Regex: Regular Expression Syntax</title> |
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| 8 | <body> |
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| 9 | <P> |
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| 11 | <TR> |
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| 12 | <td valign="top" width="300"> |
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| 13 | <h3><a href="../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../boost.png" border="0"></a></h3> |
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| 14 | </td> |
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| 15 | <TD width="353"> |
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| 16 | <H1 align="center">Boost.Regex</H1> |
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| 17 | <H2 align="center">Regular Expression Syntax</H2> |
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| 18 | </TD> |
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| 19 | <td width="50"> |
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| 20 | <h3><a href="index.html"><img height="45" width="43" alt="Boost.Regex Index" src="uarrow.gif" border="0"></a></h3> |
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| 24 | </P> |
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| 25 | <HR> |
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| 26 | <P>This section covers the regular expression syntax used by this library, this is |
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| 27 | a programmers guide, the actual syntax presented to your program's users will |
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| 28 | depend upon the <A href="syntax_option_type.html">flags</A> used during |
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| 29 | expression compilation. |
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| 30 | </P> |
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| 31 | <P>There are three main syntax options available, depending upon how |
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| 32 | you construct the regular expression object:</P> |
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| 33 | <UL> |
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| 34 | <LI> |
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| 35 | <A href="syntax_perl.html">Perl</A> (this is the default behavior).</LI> |
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| 36 | <LI> |
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| 37 | <A href="syntax_extended.html">POSIX extended</A> (including the <A href="syntax_extended.html#egrep"> |
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| 38 | egrep</A> and <A href="syntax_extended.html#awk">awk</A> variations).</LI> |
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| 39 | <LI> |
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| 40 | <A href="syntax_basic.html">POSIX Basic</A> (including the <A href="syntax_basic.html#grep"> |
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| 41 | grep</A> and <A href="syntax_basic.html#emacs">emacs</A> variations).</LI></UL> |
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| 42 | <P>You can also construct a regular expression that treats every character as a <A href="syntax_option_type.html#literals"> |
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| 43 | literal</A>, but that's not really a "syntax"!</P> |
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| 44 | <HR> |
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| 45 | <p>Revised |
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| 46 | <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%d %B, %Y" startspan --> |
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| 47 | 10 Sept 2004 |
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| 48 | <!--webbot bot="Timestamp" endspan i-checksum="39359" --></p> |
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| 49 | <p><i>© Copyright John Maddock 1998- |
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| 50 | <!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%Y" startspan --> 2004<!--webbot bot="Timestamp" endspan i-checksum="39359" --></i></p> |
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| 51 | <P><I>Use, modification and distribution are subject to the Boost Software License, |
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| 52 | Version 1.0. (See accompanying file <A href="../../../LICENSE_1_0.txt">LICENSE_1_0.txt</A> |
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| 53 | or copy at <A href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</A>)</I></P> |
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| 54 | </body> |
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