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>Struct relaxed</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="../../boost_typeerasure/reference.html#header.boost.type_erasure.relaxed_hpp" title="Header <boost/type_erasure/relaxed.hpp>"> 10<link rel="prev" href="is_relaxed.html" title="Struct template is_relaxed"> 11<link rel="next" href="require_match.html" title="Function require_match"> 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="is_relaxed.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_typeerasure/reference.html#header.boost.type_erasure.relaxed_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="require_match.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.type_erasure.relaxed"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Struct relaxed</span></h2> 30<p>boost::type_erasure::relaxed</p> 31</div> 32<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 33<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="../../boost_typeerasure/reference.html#header.boost.type_erasure.relaxed_hpp" title="Header <boost/type_erasure/relaxed.hpp>">boost/type_erasure/relaxed.hpp</a>> 34 35</span> 36<span class="keyword">struct</span> <a class="link" href="relaxed.html" title="Struct relaxed">relaxed</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector0</span><span class="special"><</span><span class="special">></span> <span class="special">{</span> 37<span class="special">}</span><span class="special">;</span></pre></div> 38<div class="refsect1"> 39<a name="id-1.3.41.13.31.4.4"></a><h2>Description</h2> 40<p>This special concept enables various useful default behavior that makes <a class="link" href="any.html" title="Class template any">any</a> act like an ordinary object. By default <a class="link" href="any.html" title="Class template any">any</a> forwards all operations to the underlying type, and provides only the operations that are specified in its <code class="computeroutput">Concept</code>.</p> 41<p>In detail, <a class="link" href="relaxed.html" title="Struct relaxed">relaxed</a> enables the following:</p> 42<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 43<li class="listitem"><p>A raw value can be assigned to an <a class="link" href="any.html" title="Class template any">any</a>. This will replace the value stored by the <a class="link" href="any.html" title="Class template any">any</a>. (But note that if <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> is present, it takes priority.)</p></li> 44<li class="listitem"><p>assignment of <a class="link" href="any.html" title="Class template any">any</a> uses the constructor if it can't use <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> (either because <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> is missing, or because the stored types do not match).</p></li> 45<li class="listitem"><p>default construction of <a class="link" href="any.html" title="Class template any">any</a> is allowed and creates a null any.</p></li> 46<li class="listitem"><p><a class="link" href="equality_comparable.html" title="Struct template equality_comparable">equality_comparable</a>: If the types do not match, it will return false.</p></li> 47<li class="listitem"><p><a class="link" href="less_than_comparable.html" title="Struct template less_than_comparable">less_than_comparable</a>: If the types do not match, the ordering will be according to <code class="computeroutput">std::type_info::before</code>.</p></li> 48<li class="listitem"><p>if the arguments to any other function do not match, it will throw a <a class="link" href="bad_function_call.html" title="Class bad_function_call">bad_function_call</a> exception instead of having undefined behavior. </p></li> 49</ul></div> 50<p> 51</p> 52</div> 53</div> 54<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 55<td align="left"></td> 56<td align="right"><div class="copyright-footer">Copyright © 2011-2013 Steven Watanabe<p> 57 Distributed under the Boost Software License, Version 1.0. (See accompanying 58 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>) 59 </p> 60</div></td> 61</tr></table> 62<hr> 63<div class="spirit-nav"> 64<a accesskey="p" href="is_relaxed.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../boost_typeerasure/reference.html#header.boost.type_erasure.relaxed_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="require_match.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a> 65</div> 66</body> 67</html> 68
