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<title>invoke_procedure</title>
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<div class="section">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.functional.invocation.functions.invoke_proc"></a><a class="link" href="invoke_proc.html" title="invoke_procedure">invoke_procedure</a>
</h5></div></div></div>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h0"></a>
<span><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>
</h6>
<p>
Calls a <a class="link" href="../../concepts/callable.html" title="Callable Object">Callable
Object</a> with the arguments from a <a class="link" href="../../../sequence.html" title="Sequence">Sequence</a>.
The result of the call is ignored.
</p>
<p>
The first template parameter can be specialized explicitly to avoid copying
and/or to control the const qualification of a function object.
</p>
<p>
For pointers to class members corresponding object can be specified as
a reference, pointer, or smart pointer. In case of the latter, a freestanding
<code class="literal">get_pointer</code> function must be defined (Boost provides
this function for <code class="literal">std::auto_ptr</code> and <a href="http://www.boost.org/libs/smart_ptr/shared_ptr.htm" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span></code></a>).
</p>
<p>
The target function must not be a pointer to a member object (dereferencing
such a pointer without returning anything does not make sense, so it
isn't implemented).
</p>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h1"></a>
<span><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>
</h6>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">Sequence</span>
<span class="special">></span>
<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>
<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>
<span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span>
<span class="keyword">class</span> <span class="identifier">Sequence</span>
<span class="special">></span>
<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>
<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>
</pre>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h2"></a>
<span><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>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<th>
<p>
Requirement
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">f</span></code>
</p>
</td>
<td>
<p>
Model of <a class="link" href="../../concepts/callable.html" title="Callable Object">Callable
Object</a>
</p>
</td>
<td>
<p>
The function to call.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">s</span></code>
</p>
</td>
<td>
<p>
Model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a>
</p>
</td>
<td>
<p>
The arguments.
</p>
</td>
</tr>
</tbody>
</table></div>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h3"></a>
<span><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
Semantics</a>
</h6>
<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>
</pre>
<p>
<span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">void</span></code>
</p>
<p>
<span class="bold"><strong>Semantics</strong></span>: Invokes <code class="computeroutput"><span class="identifier">f</span></code>
with the elements in <code class="computeroutput"><span class="identifier">s</span></code>
as arguments.
</p>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h4"></a>
<span><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>
</h6>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">booost</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>
</pre>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h5"></a>
<span><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>
</h6>
<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>
<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>
<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>
<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>
</pre>
<h6>
<a name="fusion.functional.invocation.functions.invoke_proc.h6"></a>
<span><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
also</a>
</h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<a class="link" href="invoke.html" title="invoke"><code class="computeroutput"><span class="identifier">invoke</span></code></a>
</li>
<li class="listitem">
<a class="link" href="invoke_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">invoke_function_object</span></code></a>
</li>
<li class="listitem">
<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>
</li>
<li class="listitem">
<a class="link" href="../../adapters/fused_procedure.html" title="fused_procedure"><code class="computeroutput"><span class="identifier">fused_procedure</span></code></a>
</li>
<li class="listitem">
<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>
</li>
</ul></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 © 2001-2006, 2011, 2012 Joel de Guzman,
Dan Marsden, Tobias Schwinger<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
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>)
</p>
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