<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Struct template sub_match</title> <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../../xpressive/reference.html#header.boost.xpressive.sub_match_hpp" title="Header <boost/xpressive/sub_match.hpp>"> <link rel="prev" href="regex_traits_version_2_tag.html" title="Struct regex_traits_version_2_tag"> <link rel="next" href="range_begin.html" title="Function range_begin"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" 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name="boost.xpressive.sub_match"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Struct template sub_match</span></h2> <p>boost::xpressive::sub_match — Class template <code class="computeroutput"><a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a></code> denotes the sequence of characters matched by a particular marked sub-expression. </p> </div> <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../xpressive/reference.html#header.boost.xpressive.sub_match_hpp" title="Header <boost/xpressive/sub_match.hpp>">boost/xpressive/sub_match.hpp</a>> </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> BidiIter<span class="special">></span> <span class="keyword">struct</span> <a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span> <span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span> <span class="special">></span> <span class="special">{</span> <span class="comment">// types</span> <span class="keyword">typedef</span> <span class="identifier">iterator_value</span><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <a name="boost.xpressive.sub_match.value_type"></a><span class="identifier">value_type</span><span class="special">;</span> <span class="keyword">typedef</span> <span class="identifier">iterator_difference</span><span class="special"><</span> <span class="identifier">BidiIter</span> <span class="special">></span><span class="special">::</span><span class="identifier">type</span> <a name="boost.xpressive.sub_match.difference_type"></a><span class="identifier">difference_type</span><span class="special">;</span> <span class="keyword">typedef</span> <span class="emphasis"><em><span class="identifier">unspecified</span></em></span> <a name="boost.xpressive.sub_match.string_type"></a><span class="identifier">string_type</span><span class="special">;</span> <span class="keyword">typedef</span> <span class="identifier">BidiIter</span> <a name="boost.xpressive.sub_match.iterator"></a><span class="identifier">iterator</span><span class="special">;</span> <span class="comment">// <a class="link" href="sub_match.html#boost.xpressive.sub_matchconstruct-copy-destruct">construct/copy/destruct</a></span> <a class="link" href="sub_match.html#idm45506839402480-bb"><span class="identifier">sub_match</span></a><span class="special">(</span><span class="special">)</span><span class="special">;</span> <a class="link" href="sub_match.html#idm45506839402192-bb"><span class="identifier">sub_match</span></a><span class="special">(</span><span class="identifier">BidiIter</span><span class="special">,</span> <span class="identifier">BidiIter</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span><span class="special">;</span> <span class="comment">// <a class="link" href="sub_match.html#idm45506839417648-bb">public member functions</a></span> <span class="identifier">string_type</span> <a class="link" href="sub_match.html#idm45506839417088-bb"><span class="identifier">str</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <a class="link" href="sub_match.html#idm45506839415968-bb"><span class="keyword">operator</span> <span class="identifier">string_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="identifier">difference_type</span> <a class="link" href="sub_match.html#idm45506839414848-bb"><span class="identifier">length</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <a class="link" href="sub_match.html#idm45506839413728-bb"><span class="keyword">operator</span> <span class="identifier">bool_type</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">bool</span> <a class="link" href="sub_match.html#idm45506839412608-bb"><span class="keyword">operator</span><span class="special">!</span></a><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">int</span> <a class="link" href="sub_match.html#idm45506839411488-bb"><span class="identifier">compare</span></a><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">int</span> <a class="link" href="sub_match.html#idm45506839407632-bb"><span class="identifier">compare</span></a><span class="special">(</span><a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a> <span class="keyword">const</span> <span class="special">&</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="keyword">int</span> <a class="link" href="sub_match.html#idm45506839404992-bb"><span class="identifier">compare</span></a><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">*</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span> <span class="comment">// public data members</span> <span class="keyword">bool</span> <span class="identifier">matched</span><span class="special">;</span> <span class="comment">// true if this sub-match participated in the full match. </span> <span class="special">}</span><span class="special">;</span></pre></div> <div class="refsect1"> <a name="idm45555015913760"></a><h2>Description</h2> <p>When the marked sub-expression denoted by an object of type <code class="computeroutput"><a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a><></code> participated in a regular expression match then member <code class="computeroutput">matched</code> evaluates to <code class="computeroutput">true</code>, and members <code class="computeroutput">first</code> and <code class="computeroutput">second</code> denote the range of characters <code class="computeroutput">[first,second)</code> which formed that match. Otherwise <code class="computeroutput">matched</code> is <code class="computeroutput">false</code>, and members <code class="computeroutput">first</code> and <code class="computeroutput">second</code> contained undefined values.</p> <p>If an object of type <code class="computeroutput"><a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a><></code> represents sub-expression 0 - that is to say the whole match - then member <code class="computeroutput">matched</code> is always <code class="computeroutput">true</code>, unless a partial match was obtained as a result of the flag <code class="computeroutput">match_partial</code> being passed to a regular expression algorithm, in which case member <code class="computeroutput">matched</code> is <code class="computeroutput">false</code>, and members <code class="computeroutput">first</code> and <code class="computeroutput">second</code> represent the character range that formed the partial match. </p> <div class="refsect2"> <a name="idm45555015898000"></a><h3> <a name="boost.xpressive.sub_matchconstruct-copy-destruct"></a><code class="computeroutput">sub_match</code> public construct/copy/destruct</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"><pre class="literallayout"><a name="idm45506839402480-bb"></a><span class="identifier">sub_match</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><a name="idm45506839402192-bb"></a><span class="identifier">sub_match</span><span class="special">(</span><span class="identifier">BidiIter</span> first<span class="special">,</span> <span class="identifier">BidiIter</span> second<span class="special">,</span> <span class="keyword">bool</span> matched_ <span class="special">=</span> <span class="keyword">false</span><span class="special">)</span><span class="special">;</span></pre></li> </ol></div> </div> <div class="refsect2"> <a name="idm45555015883744"></a><h3> <a name="idm45506839417648-bb"></a><code class="computeroutput">sub_match</code> public member functions</h3> <div class="orderedlist"><ol class="orderedlist" type="1"> <li class="listitem"><pre class="literallayout"><span class="identifier">string_type</span> <a name="idm45506839417088-bb"></a><span class="identifier">str</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><a name="idm45506839415968-bb"></a><span class="keyword">operator</span> <span class="identifier">string_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><span class="identifier">difference_type</span> <a name="idm45506839414848-bb"></a><span class="identifier">length</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><a name="idm45506839413728-bb"></a><span class="keyword">operator</span> <span class="identifier">bool_type</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="idm45506839412608-bb"></a><span class="keyword">operator</span><span class="special">!</span><span class="special">(</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre></li> <li class="listitem"> <pre class="literallayout"><span class="keyword">int</span> <a name="idm45506839411488-bb"></a><span class="identifier">compare</span><span class="special">(</span><span class="identifier">string_type</span> <span class="keyword">const</span> <span class="special">&</span> str<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>Performs a lexicographic string comparison. <p> </p> <div class="variablelist"><table border="0" class="variablelist compact"> <colgroup> <col align="left" valign="top"> <col> </colgroup> <tbody> <tr> <td><p><span class="term">Parameters:</span></p></td> <td><div class="variablelist"><table border="0" class="variablelist compact"> <colgroup> <col align="left" valign="top"> <col> </colgroup> <tbody><tr> <td><p><span class="term"><code class="computeroutput">str</code></span></p></td> <td><p>the string against which to compare </p></td> </tr></tbody> </table></div></td> </tr> <tr> <td><p><span class="term">Returns:</span></p></td> <td><p>the results of <code class="computeroutput">(*this).str().compare(str)</code> </p></td> </tr> </tbody> </table></div> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">int</span> <a name="idm45506839407632-bb"></a><span class="identifier">compare</span><span class="special">(</span><a class="link" href="sub_match.html" title="Struct template sub_match">sub_match</a> <span class="keyword">const</span> <span class="special">&</span> sub<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> <p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> </li> <li class="listitem"> <pre class="literallayout"><span class="keyword">int</span> <a name="idm45506839404992-bb"></a><span class="identifier">compare</span><span class="special">(</span><span class="identifier">value_type</span> <span class="keyword">const</span> <span class="special">*</span> ptr<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre> <p>This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. </p> </li> </ol></div> </div> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2007 Eric Niebler<p> Distributed under the Boost Software License, Version 1.0. (See accompanying 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>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="regex_traits_version_2_tag.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../xpressive/reference.html#header.boost.xpressive.sub_match_hpp"><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="range_begin.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>