boost_fusion/doc/html/fusion/functional/invocation/functions/invoke_proc.html

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<div class="section" title="invoke_procedure">
<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>
<a name="fusion.functional.invocation.functions.invoke_proc.description"></a><h6>
<a name="id824034"></a>
            <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>
<a name="fusion.functional.invocation.functions.invoke_proc.synopsis"></a><h6>
<a name="id824104"></a>
            <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">&lt;</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">&gt;</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">&lt;</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span><span class="special">&gt;::</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">&amp;</span> <span class="identifier">s</span><span class="special">);</span>

<span class="keyword">template</span><span class="special">&lt;</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">&gt;</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">&lt;</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">&gt;::</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">&amp;</span> <span class="identifier">s</span><span class="special">);</span>
</pre>
<a name="fusion.functional.invocation.functions.invoke_proc.parameters"></a><h6>
<a name="id824373"></a>
            <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>
<a name="fusion.functional.invocation.functions.invoke_proc.expression_semantics"></a><h6>
<a name="id824499"></a>
            <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>
<a name="fusion.functional.invocation.functions.invoke_proc.header"></a><h6>
<a name="id824579"></a>
            <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">&lt;</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">&gt;</span>
</pre>
<a name="fusion.functional.invocation.functions.invoke_proc.example"></a><h6>
<a name="id824653"></a>
            <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">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">&gt;</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>
<a name="fusion.functional.invocation.functions.invoke_proc.see_also"></a><h6>
<a name="id824825"></a>
            <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>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2001-2007 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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