1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>invoke_procedure</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. Fusion 2.2"> 8<link rel="up" href="../functions.html" title="Functions"> 9<link rel="prev" href="invoke.html" title="invoke"> 10<link rel="next" href="invoke_fobj.html" title="invoke_function_object"> 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="invoke.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.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="invoke_fobj.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="fusion.functional.invocation.functions.invoke_proc"></a><a class="link" href="invoke_proc.html" title="invoke_procedure">invoke_procedure</a> 28</h5></div></div></div> 29<h6> 30<a name="fusion.functional.invocation.functions.invoke_proc.h0"></a> 31 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.description"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.description">Description</a> 32 </h6> 33<p> 34 Calls a <a class="link" href="../../concepts/callable.html" title="Callable Object">Callable 35 Object</a> with the arguments from a <a class="link" href="../../../sequence.html" title="Sequence">Sequence</a>. 36 The result of the call is ignored. 37 </p> 38<p> 39 The first template parameter can be specialized explicitly to avoid copying 40 and/or to control the const qualification of a function object. 41 </p> 42<p> 43 For pointers to class members corresponding object can be specified as 44 a reference, pointer, or smart pointer. In case of the latter, a freestanding 45 <code class="literal">get_pointer</code> function must be defined (Boost provides 46 this function for <code class="literal">std::auto_ptr</code> and <a href="http://www.boost.org/libs/smart_ptr#shared_ptr" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span></code></a>). 47 </p> 48<p> 49 The target function must not be a pointer to a member object (dereferencing 50 such a pointer without returning anything does not make sense, so it 51 isn't implemented). 52 </p> 53<h6> 54<a name="fusion.functional.invocation.functions.invoke_proc.h1"></a> 55 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.synopsis"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.synopsis">Synopsis</a> 56 </h6> 57<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span> 58 <span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span> 59 <span class="keyword">class</span> <span class="identifier">Sequence</span> 60 <span class="special">></span> 61<span class="keyword">typename</span> <a class="link" href="../metafunctions/invoke_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a><span class="special"><</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">type</span> 62<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">Function</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">);</span> 63 64<span class="keyword">template</span><span class="special"><</span> 65 <span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span> 66 <span class="keyword">class</span> <span class="identifier">Sequence</span> 67 <span class="special">></span> 68<span class="keyword">typename</span> <a class="link" href="../metafunctions/invoke_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a><span class="special"><</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">>::</span><span class="identifier">type</span> 69<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">Function</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">);</span> 70</pre> 71<h6> 72<a name="fusion.functional.invocation.functions.invoke_proc.h2"></a> 73 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.parameters"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.parameters">Parameters</a> 74 </h6> 75<div class="informaltable"><table class="table"> 76<colgroup> 77<col> 78<col> 79<col> 80</colgroup> 81<thead><tr> 82<th> 83 <p> 84 Parameter 85 </p> 86 </th> 87<th> 88 <p> 89 Requirement 90 </p> 91 </th> 92<th> 93 <p> 94 Description 95 </p> 96 </th> 97</tr></thead> 98<tbody> 99<tr> 100<td> 101 <p> 102 <code class="computeroutput"><span class="identifier">f</span></code> 103 </p> 104 </td> 105<td> 106 <p> 107 Model of <a class="link" href="../../concepts/callable.html" title="Callable Object">Callable 108 Object</a> 109 </p> 110 </td> 111<td> 112 <p> 113 The function to call. 114 </p> 115 </td> 116</tr> 117<tr> 118<td> 119 <p> 120 <code class="computeroutput"><span class="identifier">s</span></code> 121 </p> 122 </td> 123<td> 124 <p> 125 Model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 126 Sequence</a> 127 </p> 128 </td> 129<td> 130 <p> 131 The arguments. 132 </p> 133 </td> 134</tr> 135</tbody> 136</table></div> 137<h6> 138<a name="fusion.functional.invocation.functions.invoke_proc.h3"></a> 139 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.expression_semantics"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.expression_semantics">Expression 140 Semantics</a> 141 </h6> 142<pre class="programlisting"><span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span><span class="identifier">s</span><span class="special">);</span> 143</pre> 144<p> 145 <span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">void</span></code> 146 </p> 147<p> 148 <span class="bold"><strong>Semantics</strong></span>: Invokes <code class="computeroutput"><span class="identifier">f</span></code> 149 with the elements in <code class="computeroutput"><span class="identifier">s</span></code> 150 as arguments. 151 </p> 152<h6> 153<a name="fusion.functional.invocation.functions.invoke_proc.h4"></a> 154 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.header"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.header">Header</a> 155 </h6> 156<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">invocation</span><span class="special">/</span><span class="identifier">invoke_procedure</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 157</pre> 158<h6> 159<a name="fusion.functional.invocation.functions.invoke_proc.h5"></a> 160 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.example"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.example">Example</a> 161 </h6> 162<pre class="programlisting"><a class="link" href="../../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">);</span> 163<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lambda</span><span class="special">;</span> 164<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">_1</span> <span class="special">+=</span> <span class="identifier">_2</span><span class="special">,</span> <span class="identifier">v</span><span class="special">);</span> 165<span class="identifier">assert</span><span class="special">(</span><a class="link" href="../../../sequence/intrinsic/functions/front.html" title="front"><code class="computeroutput"><span class="identifier">front</span></code></a><span class="special">(</span><span class="identifier">v</span><span class="special">)</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span> 166</pre> 167<h6> 168<a name="fusion.functional.invocation.functions.invoke_proc.h6"></a> 169 <span class="phrase"><a name="fusion.functional.invocation.functions.invoke_proc.see_also"></a></span><a class="link" href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.see_also">See 170 also</a> 171 </h6> 172<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 173<li class="listitem"> 174 <a class="link" href="invoke.html" title="invoke"><code class="computeroutput"><span class="identifier">invoke</span></code></a> 175 </li> 176<li class="listitem"> 177 <a class="link" href="invoke_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">invoke_function_object</span></code></a> 178 </li> 179<li class="listitem"> 180 <a class="link" href="../metafunctions/invoke_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a> 181 </li> 182<li class="listitem"> 183 <a class="link" href="../../adapters/fused_procedure.html" title="fused_procedure"><code class="computeroutput"><span class="identifier">fused_procedure</span></code></a> 184 </li> 185<li class="listitem"> 186 <a class="link" href="../../generation/functions/mk_fused_proc.html" title="make_fused_procedure"><code class="computeroutput"><span class="identifier">make_fused_procedure</span></code></a> 187 </li> 188</ul></div> 189</div> 190<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 191<td align="left"></td> 192<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 193 Dan Marsden, Tobias Schwinger<p> 194 Distributed under the Boost Software License, Version 1.0. (See accompanying 195 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>) 196 </p> 197</div></td> 198</tr></table> 199<hr> 200<div class="spirit-nav"> 201<a accesskey="p" href="invoke.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.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="invoke_fobj.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 202</div> 203</body> 204</html> 205
