<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qxmlnamepool.cpp --> <title>QXmlNamePool Class | Qt XML Patterns 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtxmlpatterns-index.html">Qt XML Patterns</a></td><td ><a href="qtxmlpatterns-module.html">C++ Classes</a></td><td >QXmlNamePool</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">QXmlNamePool Class</h1> <!-- $$$QXmlNamePool-brief --> <p>The <a href="qxmlnamepool.html">QXmlNamePool</a> class is a table of shared strings referenced by instances of <a href="qxmlname.html">QXmlName</a>. <a href="#details">More...</a></p> <!-- @@@QXmlNamePool --> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QXmlNamePool></span> </td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += xmlpatterns</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign"> Qt 4.4</td></tr></table></div><ul> <li><a href="qxmlnamepool-members.html">List of all members, including inherited members</a></li> </ul> <p><b>Note:</b> All functions in this class are reentrant.</p> <a name="public-functions"></a> <h2 id="public-functions">Public Functions</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlnamepool.html#QXmlNamePool">QXmlNamePool</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlnamepool.html#QXmlNamePool-1">QXmlNamePool</a></b>(const QXmlNamePool &<i>other</i>)</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlnamepool.html#dtor.QXmlNamePool">~QXmlNamePool</a></b>()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QXmlNamePool &</td><td class="memItemRight bottomAlign"><b><a href="qxmlnamepool.html#operator-eq">operator=</a></b>(const QXmlNamePool &<i>other</i>)</td></tr> </table></div> <a name="details"></a> <!-- $$$QXmlNamePool-description --> <div class="descr"> <h2 id="details">Detailed Description</h2> <p>The <a href="qxmlnamepool.html">QXmlNamePool</a> class is a table of shared strings referenced by instances of <a href="qxmlname.html">QXmlName</a>.</p> <p><a href="qxmlnamepool.html">QXmlNamePool</a> is used to optimize operations on instances of <a href="qxmlname.html">QXmlName</a>. An instance of <a href="qxmlname.html">QXmlName</a> represents an XML name in a way that allows the XML name to be compared and passed around efficiently. The efficiency is achieved by storing the strings comprising the XML names in an instance of <a href="qxmlnamepool.html">QXmlNamePool</a>, where they are mapped to binary identifiers, which are then packed into a key which is stored in the <a href="qxmlname.html">QXmlName</a>.</p> <p>This means that each instance of <a href="qxmlname.html">QXmlName</a> is tied to the name pool it was created with, and that name pool should be kept in scope and used to create all instances of <a href="qxmlname.html">QXmlName</a> that might be compared. Note also that the name pool is required if you must reconstitute the <a href="qxmlname.html">QXmlName</a> as text, or if you must access any of its component strings, so although instances of <a href="qxmlname.html">QXmlName</a> can be compared without reference to a name pool, the name pool must be kept in scope if the name's strings must be accessed later.</p> </div> <p><b>See also </b><a href="qxmlname.html">QXmlName</a> and <a href="qxmlquery.html#namePool">QXmlQuery::namePool</a>().</p> <!-- @@@QXmlNamePool --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QXmlNamePool[overload1]$$$QXmlNamePool --> <h3 class="fn" id="QXmlNamePool"><a name="QXmlNamePool"></a>QXmlNamePool::<span class="name">QXmlNamePool</span>()</h3> <p>Constructs an empty name pool.</p> <!-- @@@QXmlNamePool --> <!-- $$$QXmlNamePool$$$QXmlNamePoolconstQXmlNamePool& --> <h3 class="fn" id="QXmlNamePool-1"><a name="QXmlNamePool-1"></a>QXmlNamePool::<span class="name">QXmlNamePool</span>(const <span class="type"><a href="qxmlnamepool.html#QXmlNamePool">QXmlNamePool</a></span> &<i>other</i>)</h3> <p>Constructs a copy of the <i>other</i> name pool.</p> <!-- @@@QXmlNamePool --> <!-- $$$~QXmlNamePool[overload1]$$$~QXmlNamePool --> <h3 class="fn" id="dtor.QXmlNamePool"><a name="dtor.QXmlNamePool"></a>QXmlNamePool::<span class="name">~QXmlNamePool</span>()</h3> <p>Destroys the name pool. Instances of <a href="qxmlname.html">QXmlName</a> constructed with this name pool can still be compared after this destructor is called, but their text strings cannot be accessed.</p> <!-- @@@~QXmlNamePool --> <!-- $$$operator=[overload1]$$$operator=constQXmlNamePool& --> <h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qxmlnamepool.html#QXmlNamePool">QXmlNamePool</a></span> &QXmlNamePool::<span class="name">operator=</span>(const <span class="type"><a href="qxmlnamepool.html#QXmlNamePool">QXmlNamePool</a></span> &<i>other</i>)</h3> <p>Assigns the <i>other</i> name pool to this one.</p> <!-- @@@operator= --> </div> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. 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