<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Chapter 22. ElementRef and ElementHolder Wappers</title> <link rel="stylesheet" href="apiReference.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> <link rel="start" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> <link rel="up" href="index.html" title="Berkeley DB C++ Standard Template Library API Reference" /> <link rel="prev" href="dbstl_helper_classes.html" title="Chapter 21. Dbstl Helper Classes" /> <link rel="next" href="ElementHolder.html" title="Chapter 23. ElementHolder" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">Chapter 22. ElementRef and ElementHolder Wappers </th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="dbstl_helper_classes.html">Prev</a> </td> <th width="60%" align="center"> </th> <td width="20%" align="right"> <a accesskey="n" href="ElementHolder.html">Next</a></td> </tr> </table> <hr /> </div> <div class="chapter" lang="en" xml:lang="en"> <div class="titlepage"> <div> <div> <h2 class="title"><a id="Element_wrappers"></a>Chapter 22. ElementRef and ElementHolder Wappers </h2> </div> </div> </div> <p>An <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> and <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder">ElementHolder</a> object represents the reference to the data element referenced by an iterator. </p> <p>Each iterator object has an <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> or <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder">ElementHolder</a> object that stores the data element that the iterator points to.</p> <p>The <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder">ElementHolder</a> class is used to store primitive types into STL containers.</p> <p>The <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> class is used to store other types into STL containers.</p> <p>The <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> and <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder">ElementHolder</a> classes have identical interfaces, and are treated the same by other STL classes. Since the <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> class inherits from the template data class, all methods have a _DB_STL_ prefix to avoid name clashes.</p> <p>An <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef">ElementRef</a> or <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder">ElementHolder</a> class corresponds to a single iterator instance. An Element object is generally owned by an iterator object. The ownership relationship is swapped in some specific situations, specifically for the dereference and array index operator. </p> <h4><a id="id1568331"></a> Public Members </h4> <div class="informaltable"> <table border="1" width="80%"> <colgroup> <col /> <col /> </colgroup> <thead> <tr> <th>Member</th> <th>Description</th> </tr> </thead> <tbody> <tr> <td> <a class="link" href="ElementRef.html" title="Chapter 24. ElementRef"> ElementRef</a> </td> <td> ElementRef</td> </tr> <tr> <td> <a class="link" href="ElementHolder.html" title="Chapter 23. ElementHolder"> ElementHolder</a> </td> <td> ElementHolder</td> </tr> </tbody> </table> </div> <h4><a id="id1568683"></a> Group</h4> <p> <a class="xref" href="dbstl_helper_classes.html" title="Chapter 21. Dbstl Helper Classes"> Dbstl Helper Classes </a> </p> <p> </p> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="dbstl_helper_classes.html">Prev</a> </td> <td width="20%" align="center"> </td> <td width="40%" align="right"> <a accesskey="n" href="ElementHolder.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">Chapter 21. Dbstl Helper Classes </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> Chapter 23. ElementHolder </td> </tr> </table> </div> </body> </html>