<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>Function apply_visitor /*three or more variant parameters*/</title> <link rel="stylesheet" href="../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> <link rel="home" href="../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> <link rel="up" href="../variant/reference.html#header.boost.variant.multivisitors_hpp" title="Header <boost/variant/multivisitors.hpp>"> <link rel="prev" href="../BOOST_VARAINT_MAX_MULTIVIZITOR_PARAMS.html" title="Macro BOOST_VARAINT_MAX_MULTIVIZITOR_PARAMS"> <link rel="next" href="bad_get.html" title="Class bad_get"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ 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name="boost.apply_vi_idm45507092235520"></a><div class="titlepage"></div> <div class="refnamediv"> <h2><span class="refentrytitle">Function apply_visitor /*three or more variant parameters*/</span></h2> <p>boost::apply_visitor /*three or more variant parameters*/</p> </div> <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> <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.multivisitors_hpp" title="Header <boost/variant/multivisitors.hpp>">boost/variant/multivisitors.hpp</a>> </span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> MultiVisitor<span class="special">,</span> <span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">,</span> <span class="keyword">typename</span> Variant3<span class="special">></span> <span class="keyword">typename</span> <span class="identifier">MultiVisitor</span><span class="special">::</span><span class="identifier">result_type</span> <span class="identifier">OR</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> <span class="identifier">apply_visitor</span> <span class="comment">/*three or more variant parameters*/</span><span class="special">(</span><span class="identifier">MultiVisitor</span> <span class="special">&</span> visitor<span class="special">,</span> <span class="identifier">Variant1</span> <span class="special">&</span> operand1<span class="special">,</span> <span class="identifier">Variant2</span> <span class="special">&</span> operand2<span class="special">,</span> <span class="identifier">Variant3</span> <span class="special">&</span> operand3<span class="special">,</span> <span class="special">...</span> other_operands<span class="special">)</span><span class="special">;</span> <span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> MultiVisitor<span class="special">,</span> <span class="keyword">typename</span> Variant1<span class="special">,</span> <span class="keyword">typename</span> Variant2<span class="special">,</span> <span class="keyword">typename</span> Variant3<span class="special">></span> <span class="keyword">typename</span> <span class="identifier">MultiVisitor</span><span class="special">::</span><span class="identifier">result_type</span> <span class="identifier">OR</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">auto</span><span class="special">)</span> <span class="identifier">apply_visitor</span> <span class="comment">/*three or more variant parameters*/</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">MultiVisitor</span> <span class="special">&</span> visitor<span class="special">,</span> <span class="identifier">Variant1</span> <span class="special">&</span> operand1<span class="special">,</span> <span class="identifier">Variant2</span> <span class="special">&</span> operand2<span class="special">,</span> <span class="identifier">Variant3</span> <span class="special">&</span> operand3<span class="special">,</span> <span class="special">...</span> other_operands<span class="special">)</span><span class="special">;</span></pre></div> <div class="refsect1"> <a name="idm45555031591424"></a><h2>Description</h2> <p>Allows compile-time checked type-safe application of the given visitor to the content of the given variant, ensuring that all types are handled by the visitor. See <code class="computeroutput"><a class="link" href="apply_visitor.html" title="Function apply_visitor">apply_visitor</a></code> for more information.</p> </div> </div> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <td align="left"></td> <td align="right"><div class="copyright-footer">Copyright © 2002, 2003 Eric Friedman, Itay Maman<p>Distributed under the Boost Software License, Version 1.0. (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) </p> </div></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="../BOOST_VARAINT_MAX_MULTIVIZITOR_PARAMS.html"><img src="../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../variant/reference.html#header.boost.variant.multivisitors_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="bad_get.html"><img src="../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>