1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Concept DefaultConstructible</title> 6<link rel="stylesheet" href="../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="concept_check.html#concepts.reference" title="Concept reference"> 10<link rel="prev" href="RandomAccessIterator.html" title="Concept RandomAccessIterator"> 11<link rel="next" href="CopyConstructible.html" title="Concept CopyConstructible"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../boost.png"></td> 16<td align="center"><a href="../../index.html">Home</a></td> 17<td align="center"><a href="../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="RandomAccessIterator.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="concept_check.html#concepts.reference"><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="CopyConstructible.html"><img src="../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="DefaultConstructible"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Concept DefaultConstructible</span></h2> 30<p>DefaultConstructible</p> 31</div> 32<div class="refsect1"> 33<a name="id-1.3.49.3.10.3"></a><h2>Description</h2> 34<p>DefaultConstructible objects only need to have a default 35 constructor.</p> 36</div> 37<div class="refsect1"> 38<a name="id-1.3.49.3.10.4"></a><h2>Notation</h2> 39<div class="variablelist"><dl class="variablelist"> 40<dt><span class="term">X</span></dt> 41<dd>A type playing the role of default-constructible-type in the <a class="link" href="DefaultConstructible.html" title="Concept DefaultConstructible">DefaultConstructible</a> concept.</dd> 42</dl></div> 43</div> 44<div class="refsect1"> 45<a name="id-1.3.49.3.10.5"></a><h2>Valid expressions</h2> 46<div class="informaltable"><table class="table"> 47<colgroup> 48<col> 49<col> 50<col> 51<col> 52</colgroup> 53<thead><tr> 54<th>Name</th> 55<th>Expression</th> 56<th>Type</th> 57<th>Semantics</th> 58</tr></thead> 59<tbody><tr> 60<td><p>Construction</p></td> 61<td><p>X()</p></td> 62<td><p><span class="type">X</span></p></td> 63<td><p>Construct an instance of the type with default parameters.</p></td> 64</tr></tbody> 65</table></div> 66</div> 67<div class="refsect1"> 68<a name="id-1.3.49.3.10.6"></a><h2>Models</h2> 69<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 70<li class="listitem"><span class="simplelist"><span class="type">int</span></span></li> 71<li class="listitem"><span class="simplelist"><span class="type">std::vector<double></span></span></li> 72</ul></div> 73</div> 74</div> 75<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 76<td align="left"></td> 77<td align="right"><div class="copyright-footer">Copyright © 2001, 2002 Indiana University<br>Copyright © 2000, 2001 University of Notre Dame du Lac<br>Copyright © 2000 Jeremy Siek, Lie-Quan Lee, Andrew Lumsdaine<br>Copyright © 1996-1999 Silicon Graphics Computer Systems, Inc.<br>Copyright © 1994 Hewlett-Packard Company<p>Distributed under the Boost Software License, Version 1.0. 78 (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 79 <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 80 </p> 81<p>This product includes software developed at the University 82 of Notre Dame and the Pervasive Technology Labs at Indiana 83 University. For technical information contact Andrew Lumsdaine 84 at the Pervasive Technology Labs at Indiana University. For 85 administrative and license questions contact the Advanced 86 Research and Technology Institute at 351 West 10th Street. 87 Indianapolis, Indiana 46202, phone 317-278-4100, fax 88 317-274-5902.</p> 89<p>Some concepts based on versions from the MTL draft manual 90 and Boost Graph and Property Map documentation, the SGI Standard 91 Template Library documentation and the Hewlett-Packard STL, 92 under the following license: 93 </p> 94<div class="blockquote"><blockquote class="blockquote"><p>Permission to use, copy, modify, distribute and 95 sell this software and its documentation for any purpose is 96 hereby granted without fee, provided that the above copyright 97 notice appears in all copies and that both that copyright 98 notice and this permission notice appear in supporting 99 documentation. Silicon Graphics makes no representations 100 about the suitability of this software for any purpose. It is 101 provided "as is" without express or implied 102 warranty.</p></blockquote></div> 103</div></td> 104</tr></table> 105<hr> 106<div class="spirit-nav"> 107<a accesskey="p" href="RandomAccessIterator.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="concept_check.html#concepts.reference"><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="CopyConstructible.html"><img src="../../doc/src/images/next.png" alt="Next"></a> 108</div> 109</body> 110</html> 111
