1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>BOOST_DECLARE_IS_CALLABLE</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. Boost.Convert 2.0"> 8<link rel="up" href="../supporting_tools.html" title="Supporting Tools"> 9<link rel="prev" href="boost_declare_has_member.html" title="BOOST_DECLARE_HAS_MEMBER"> 10<link rel="next" href="boost__cnv__is_cnv.html" title="boost::cnv::is_cnv"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="boost_declare_has_member.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../supporting_tools.html"><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="boost__cnv__is_cnv.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="boost_convert.supporting_tools.boost_declare_is_callable"></a><a class="link" href="boost_declare_is_callable.html" title="BOOST_DECLARE_IS_CALLABLE">BOOST_DECLARE_IS_CALLABLE</a> 28</h3></div></div></div> 29<p> 30 The BOOST_DECLARE_IS_CALLABLE macro extends the functionality provided by 31 BOOST_DECLARE_HAS_MEMBER and allows to declare a trait which would then let 32 introspect the existence of a named class member function <span class="emphasis"><em>callable 33 with the supplied signature</em></span>. 34 </p> 35<p> 36 For example, the following declarations introduce <code class="computeroutput"><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span></code> 37 and <code class="computeroutput"><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span></code> traits: 38 </p> 39<p> 40</p> 41<pre class="programlisting"><span class="keyword">namespace</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">local</span> 42<span class="special">{</span> 43 <span class="identifier">BOOST_DECLARE_IS_CALLABLE</span><span class="special">(</span><span class="identifier">can_call_funop</span><span class="special">,</span> <span class="keyword">operator</span><span class="special">());</span> 44 <span class="identifier">BOOST_DECLARE_IS_CALLABLE</span><span class="special">(</span><span class="identifier">can_call_func</span><span class="special">,</span> <span class="identifier">func</span><span class="special">);</span> 45<span class="special">}}</span> 46</pre> 47<p> 48 </p> 49<p> 50 The traits allow to test if the supplied class has respectively <code class="computeroutput"><span class="keyword">operator</span><span class="special">()</span></code> 51 and <code class="computeroutput"><span class="identifier">func</span><span class="special">()</span></code> 52 member functions callable with the specified signature: 53 </p> 54<p> 55</p> 56<pre class="programlisting"><span class="keyword">namespace</span> <span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">callable</span> 57<span class="special">{</span> 58 <span class="keyword">struct</span> <span class="identifier">test1</span> <span class="special">{</span> <span class="keyword">int</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> <span class="special">}};</span> 59 <span class="keyword">struct</span> <span class="identifier">test2</span> <span class="special">{</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)</span> <span class="special">{}};</span> 60 <span class="keyword">struct</span> <span class="identifier">test3</span> <span class="special">{</span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">{}};</span> 61 <span class="keyword">struct</span> <span class="identifier">test4</span> <span class="special">{</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">int</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 62 <span class="keyword">struct</span> <span class="identifier">test5</span> <span class="special">{</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">operator</span><span class="special">()(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">=</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">())</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 63 <span class="keyword">struct</span> <span class="identifier">test6</span> <span class="special">{</span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 64 <span class="keyword">struct</span> <span class="identifier">test7</span> <span class="special">{</span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> <span class="identifier">T</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">T</span><span class="special">();</span> <span class="special">}};</span> 65 66 <span class="keyword">struct</span> <span class="identifier">test11</span> <span class="special">{</span> <span class="keyword">int</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> <span class="special">}};</span> 67 <span class="keyword">struct</span> <span class="identifier">test12</span> <span class="special">{</span> <span class="keyword">void</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)</span> <span class="special">{}};</span> 68 <span class="keyword">struct</span> <span class="identifier">test13</span> <span class="special">{</span> <span class="keyword">void</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="special">{}};</span> 69 <span class="keyword">struct</span> <span class="identifier">test14</span> <span class="special">{</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">int</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 70 <span class="keyword">struct</span> <span class="identifier">test15</span> <span class="special">{</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">func</span><span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="keyword">const</span><span class="special">&</span> <span class="special">=</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">())</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 71 <span class="keyword">struct</span> <span class="identifier">test16</span> <span class="special">{</span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">func</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">();</span> <span class="special">}};</span> 72 <span class="keyword">struct</span> <span class="identifier">test17</span> <span class="special">{</span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> <span class="identifier">T</span> <span class="identifier">func</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="keyword">return</span> <span class="identifier">T</span><span class="special">();</span> <span class="special">}};</span> 73<span class="special">}}</span> 74</pre> 75<p> 76 </p> 77<p> 78</p> 79<pre class="programlisting"><span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 80<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">double</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 81<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 82<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 83<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 84<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 85<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test1</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 86 87<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test2</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 88<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test2</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 89<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test2</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 90<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_funop</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test2</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 91</pre> 92<p> 93 </p> 94<p> 95</p> 96<pre class="programlisting"><span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 97<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">double</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 98<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 99<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 100<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 101<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="keyword">int</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 102<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test11</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 103 104<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test12</span><span class="special">,</span> <span class="keyword">int</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">false</span><span class="special">));</span> 105<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test12</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 106<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test12</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 107<span class="identifier">BOOST_TEST</span><span class="special">((</span><span class="identifier">local</span><span class="special">::</span><span class="identifier">can_call_func</span><span class="special"><</span><span class="identifier">callable</span><span class="special">::</span><span class="identifier">test12</span><span class="special">,</span> <span class="keyword">void</span> <span class="special">(</span> <span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*)>::</span><span class="identifier">value</span> <span class="special">==</span> <span class="keyword">true</span><span class="special">));</span> 108</pre> 109<p> 110 </p> 111<p> 112 As it can be seen from the example the traits check for the existence of 113 a <span class="emphasis"><em>callable</em></span> member function but <span class="emphasis"><em>not necessarily 114 of the specified signature</em></span>. Please check the <span class="emphasis"><em>Boost.TTI</em></span> 115 library for the latter. 116 </p> 117</div> 118<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 119<td align="left"></td> 120<td align="right"><div class="copyright-footer">Copyright © 2009-2016 Vladimir Batov<p> 121 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>. 122 </p> 123</div></td> 124</tr></table> 125<hr> 126<div class="spirit-nav"> 127<a accesskey="p" href="boost_declare_has_member.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../supporting_tools.html"><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="boost__cnv__is_cnv.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 128</div> 129</body> 130</html> 131