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>Function template visitor_ptr</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="../variant/reference.html#header.boost.variant.visitor_ptr_hpp" title="Header <boost/variant/visitor_ptr.hpp>"> 10<link rel="prev" href="visitor_ptr_t.html" title="Class template visitor_ptr_t"> 11<link rel="next" href="../variant/design.html" title="Design Overview"> 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="visitor_ptr_t.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../variant/reference.html#header.boost.variant.visitor_ptr_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="../variant/design.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="refentry"> 27<a name="boost.visitor_ptr"></a><div class="titlepage"></div> 28<div class="refnamediv"> 29<h2><span class="refentrytitle">Function template visitor_ptr</span></h2> 30<p>boost::visitor_ptr — Returns a visitor object that adapts function pointers for 31 use as a static visitor.</p> 32</div> 33<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> 34<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="../variant/reference.html#header.boost.variant.visitor_ptr_hpp" title="Header <boost/variant/visitor_ptr.hpp>">boost/variant/visitor_ptr.hpp</a>> 35 36</span> 37<span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> R<span class="special">,</span> <span class="keyword">typename</span> T<span class="special">></span> <a class="link" href="visitor_ptr_t.html" title="Class template visitor_ptr_t">visitor_ptr_t</a><span class="special"><</span><span class="identifier">T</span><span class="special">,</span><span class="identifier">R</span><span class="special">></span> <span class="identifier">visitor_ptr</span><span class="special">(</span><span class="identifier">R</span> <span class="special">(</span><span class="special">*</span><span class="special">)</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span><span class="special">)</span><span class="special">;</span></pre></div> 38<div class="refsect1"> 39<a name="id-1.3.46.5.14.4.4"></a><h2>Description</h2> 40<p>Constructs and returns a 41 <code class="computeroutput"><a class="link" href="visitor_ptr_t.html" title="Class template visitor_ptr_t">visitor_ptr_t</a></code> adaptor over the 42 given function.</p> 43<div class="variablelist"><table border="0" class="variablelist compact"> 44<colgroup> 45<col align="left" valign="top"> 46<col> 47</colgroup> 48<tbody> 49<tr> 50<td><p><span class="term">Returns:</span></p></td> 51<td>Returns a <code class="computeroutput"><a class="link" href="visitor_ptr_t.html" title="Class template visitor_ptr_t">visitor_ptr_t</a></code> 52 visitor object that, when applied, invokes the given 53 function.</td> 54</tr> 55<tr> 56<td><p><span class="term">Throws:</span></p></td> 57<td>Will not throw. (Note, however, that the returned 58 <a class="link" href="visitor_ptr_t.html" title="Class template visitor_ptr_t">visitor object</a> may 59 throw when applied.)</td> 60</tr> 61</tbody> 62</table></div> 63</div> 64</div> 65<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 66<td align="left"></td> 67<td align="right"><div class="copyright-footer">Copyright © 2002, 2003 Eric Friedman, Itay Maman<br>Copyright © 2014-2020 Antony Polukhin<p>Distributed under the Boost Software License, Version 1.0. 68 (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 69 <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 70 </p> 71</div></td> 72</tr></table> 73<hr> 74<div class="spirit-nav"> 75<a accesskey="p" href="visitor_ptr_t.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../variant/reference.html#header.boost.variant.visitor_ptr_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="../variant/design.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> 76</div> 77</body> 78</html> 79
