1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Function template convert</title> 5<link rel="stylesheet" href="../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../index.html" title="Chapter 1. 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21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="convert_idm45934319980144.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_convert_c___reference.html#header.boost.convert_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="../header/boost/convert/base_hpp.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="refentry"> 26<a name="boost.convert_idm45934319972896"></a><div class="titlepage"></div> 27<div class="refnamediv"> 28<h2><span class="refentrytitle">Function template convert</span></h2> 29<p>boost::convert — Boost.Convert deployment interface with the default converter. </p> 30</div> 31<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 32<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_convert_c___reference.html#header.boost.convert_hpp" title="Header <boost/convert.hpp>">boost/convert.hpp</a>> 33 34</span> 35<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> TypeOut<span class="special">,</span> <span class="keyword">typename</span> TypeIn<span class="special">></span> 36 <span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><</span> <span class="identifier">TypeOut</span> <span class="special">></span> <span class="identifier">convert</span><span class="special">(</span><span class="identifier">TypeIn</span> <span class="keyword">const</span> <span class="special">&</span> value_in<span class="special">)</span><span class="special">;</span></pre></div> 37<div class="refsect1"> 38<a name="idm45766273996912"></a><h2>Description</h2> 39<p>For example, </p> 40<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">by_default</span> <span class="special">:</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">cnv</span><span class="special">::</span><span class="identifier">cstream</span> <span class="special">{</span><span class="special">}</span><span class="special">;</span> 41 42<span class="comment">// boost::cnv::cstream (through boost::cnv::by_default) is deployed</span> 43<span class="comment">// as the default converter when no converter is provided explicitly.</span> 44<span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">i</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">convert</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span><span class="special">(</span><span class="string">"12"</span><span class="special">)</span><span class="special">;</span> 45<span class="identifier">boost</span><span class="special">::</span><span class="identifier">optional</span><span class="special"><</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">s</span> <span class="special">=</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">convert</span><span class="special"><</span><span class="identifier">string</span><span class="special">></span><span class="special">(</span><span class="number">123</span><span class="special">.</span><span class="number">456</span><span class="special">)</span><span class="special">;</span> 46</pre> 47<p> </p> 48</div> 49</div> 50<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 51<td align="left"></td> 52<td align="right"><div class="copyright-footer">Copyright © 2009-2016 Vladimir Batov<p> 53 Distributed under the Boost Software License, Version 1.0. See copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>. 54 </p> 55</div></td> 56</tr></table> 57<hr> 58<div class="spirit-nav"> 59<a accesskey="p" href="convert_idm45934319980144.html"><img src="../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../boost_convert_c___reference.html#header.boost.convert_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="../header/boost/convert/base_hpp.html"><img src="../../../../../doc/src/images/next.png" alt="Next"></a> 60</div> 61</body> 62</html> 63
