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invoke_function_object</title>
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</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h5 class="title">
<a name="fusion.functional.invocation.functions.invoke_fobj"></a><a class="link" href="invoke_fobj.html" title="invoke_function_object">
invoke_function_object</a>
</h5></div></div></div>
<a name="fusion.functional.invocation.functions.invoke_fobj"></a><a href="invoke_fobj.html" title="
invoke_function_object">
invoke_function_object</a></h5></div></div></div>
<a name="fusion.functional.invocation.functions.invoke_fobj.description"></a><h6>
<a name="id2817170"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.description">Description</a>
<a name="id659620"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.description">Description</a>
</h6>
<p>
Calls a <a class="link" href="../../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
Object</a> with the arguments from a <a class="link" href="../../../sequence.html" title="Sequence">Sequence</a>.
Calls a <a href="../../concepts/poly.html" title=" Polymorphic Function
Object">Polymorphic Function
Object</a> with the arguments from a <a href="../../../sequence.html" title="Sequence">Sequence</a>.
</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>
<a name="fusion.functional.invocation.functions.invoke_fobj.synopsis"></a><h6>
<a name="id2817218"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.synopsis">Synopsis</a>
<a name="id659675"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.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_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</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="keyword">typename</span> <a href="../metafunctions/invoke_fobj.html" title="
invoke_function_object"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</span></tt></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_function_object</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_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</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="keyword">typename</span> <a href="../metafunctions/invoke_fobj.html" title="
invoke_function_object"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</span></tt></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_function_object</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_fobj.parameters"></a><h6>
<a name="id2817558"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.parameters">Parameters</a>
<a name="id660056"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.parameters">Parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
@ -89,12 +94,13 @@
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">f</span></code>
<tt class="computeroutput"><span class="identifier">f</span></tt>
</p>
</td>
<td>
<p>
Model of <a class="link" href="../../concepts/poly.html" title="Polymorphic Function Object">Polymorphic
Model of <a href="../../concepts/poly.html" title=" Polymorphic Function
Object">Polymorphic
Function Object</a>
</p>
</td>
@ -107,12 +113,13 @@
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">s</span></code>
<tt class="computeroutput"><span class="identifier">s</span></tt>
</p>
</td>
<td>
<p>
Model of <a class="link" href="../../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Model of <a href="../../../sequence/concepts/forward_sequence.html" title="Forward
Sequence">Forward
Sequence</a>
</p>
</td>
@ -125,28 +132,28 @@
</tbody>
</table></div>
<a name="fusion.functional.invocation.functions.invoke_fobj.expression_semantics"></a><h6>
<a name="id2817702"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.expression_semantics">Expression
<a name="id660216"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.expression_semantics">Expression
Semantics</a>
</h6>
<pre class="programlisting">
<span class="identifier">invoke_function_object</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>: Return type of <code class="computeroutput"><span class="identifier">f</span></code> when invoked with the elements in
<code class="computeroutput"><span class="identifier">s</span></code> as its arguments.
<span class="bold"><b>Return type</b></span>: Return type of <tt class="computeroutput"><span class="identifier">f</span></tt> when invoked with the elements in
<tt class="computeroutput"><span class="identifier">s</span></tt> as its arguments.
</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>
<span class="bold"><b>Semantics</b></span>: Invokes <tt class="computeroutput"><span class="identifier">f</span></tt>
with the elements in <tt class="computeroutput"><span class="identifier">s</span></tt>
as arguments and returns the result of the call expression.
</p>
<p>
/functional/invocation/invoke_function_object.hpp&gt;
</p>
<a name="fusion.functional.invocation.functions.invoke_fobj.example"></a><h6>
<a name="id2817830"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.example">Example</a>
<a name="id660359"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.example">Example</a>
</h6>
<pre class="programlisting">
<span class="keyword">struct</span> <span class="identifier">sub</span>
@ -168,19 +175,21 @@
<span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span>
<span class="special">{</span>
<span class="identifier">sub</span> <span class="identifier">f</span><span class="special">;</span>
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">f</span><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">invoke_function_object</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span><a class="link" href="../../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)));</span>
<span class="identifier">assert</span><span class="special">(</span><span class="identifier">f</span><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)</span> <span class="special">==</span> <span class="identifier">invoke_function_object</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span><a href="../../../container/generation/functions/make_vector.html" title="make_vector"><tt class="computeroutput"><span class="identifier">make_vector</span></tt></a><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">1</span><span class="special">)));</span>
<span class="special">}</span>
</pre>
<a name="fusion.functional.invocation.functions.invoke_fobj.see_also"></a><h6>
<a name="id2818325"></a>
<a class="link" href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.see_also">See
<a name="id660909"></a>
<a href="invoke_fobj.html#fusion.functional.invocation.functions.invoke_fobj.see_also">See
also</a>
</h6>
<div class="itemizedlist"><ul type="disc">
<li><a class="link" href="invoke.html" title="invoke"><code class="computeroutput"><span class="identifier">invoke</span></code></a></li>
<li><a class="link" href="invoke_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">invoke_procedure</span></code></a></li>
<li><a class="link" href="../metafunctions/invoke_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</span></code></a></li>
<li><a class="link" href="../../adapters/fused_function_object.html" title="fused_function_object"><code class="computeroutput"><span class="identifier">fused_function_object</span></code></a></li>
<li><a href="invoke.html" title="invoke"><tt class="computeroutput"><span class="identifier">invoke</span></tt></a></li>
<li><a href="invoke_proc.html" title="
invoke_procedure"><tt class="computeroutput"><span class="identifier">invoke_procedure</span></tt></a></li>
<li><a href="../metafunctions/invoke_fobj.html" title="
invoke_function_object"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_function_object</span></tt></a></li>
<li><a href="../../adapters/fused_function_object.html" title="fused_function_object"><tt class="computeroutput"><span class="identifier">fused_function_object</span></tt></a></li>
</ul></div>
</div>
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