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<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.functional.adapters.fused"></a><a class="link" href="fused.html" title="fused">fused</a>
</h4></div></div></div>
<a name="fusion.functional.adapters.fused.description"></a><h6>
<a name="id1112370"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.description">Description</a>
</h6>
<p>
An unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
Object</a> adapter template for <a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred
Callable Object</a> target functions. It takes a <a class="link" href="../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
Sequence</a> that contains the arguments for the target function.
</p>
<p>
The type of the target function is allowed to be const qualified or a reference.
Const qualification is preserved and propagated appropriately (in other
words, only const versions of <code class="literal">operator()</code> can be used
for a target function object that is const or, if the target function object
is held by value, the adapter is const - these semantics have nothing to
do with the const qualification of a member function, which is referring
to the type of object pointed to by <code class="literal">this</code> which is specified
with the first element in the sequence passed to the adapter).
</p>
<p>
If the target function is a pointer to a class members, the 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>
<a name="fusion.functional.adapters.fused.header"></a><h6>
<a name="id1112445"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.header">Header</a>
</h6>
<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">adapter</span><span class="special">/</span><span class="identifier">fused</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
</pre>
<a name="fusion.functional.adapters.fused.synopsis"></a><h6>
<a name="id1112515"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.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">fused</span><span class="special">;</span>
</pre>
<a name="fusion.functional.adapters.fused.template_parameters"></a><h6>
<a name="id1112567"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.template_parameters">Template
parameters</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Parameter
</p>
</th>
<th>
<p>
Description
</p>
</th>
<th>
<p>
Default
</p>
</th>
</tr></thead>
<tbody><tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">Function</span></code>
</p>
</td>
<td>
<p>
A <a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred
Callable Object</a>
</p>
</td>
<td>
</td>
</tr></tbody>
</table></div>
<a name="fusion.functional.adapters.fused.model_of"></a><h6>
<a name="id1112655"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.model_of">Model of</a>
</h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
Object</a>
</li>
<li class="listitem">
<a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred Callable
Object</a>
</li>
</ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><code class="computeroutput"><span class="identifier">R</span></code></span></dt>
<dd><p>
A possibly const qualified <a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred
Callable Object</a> type or reference type thereof
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">r</span></code></span></dt>
<dd><p>
An object convertible to <code class="computeroutput"><span class="identifier">R</span></code>
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt>
<dd><p>
A <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> of arguments that
are accepted by <code class="computeroutput"><span class="identifier">r</span></code>
</p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd><p>
An instance of <code class="computeroutput"><span class="identifier">fused</span><span class="special"><</span><span class="identifier">R</span><span class="special">></span></code>
</p></dd>
</dl>
</div>
<a name="fusion.functional.adapters.fused.expression_semantics"></a><h6>
<a name="id1112822"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.expression_semantics">Expression
Semantics</a>
</h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Expression
</p>
</th>
<th>
<p>
Semantics
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">fused</span><span class="special"><</span><span class="identifier">R</span><span class="special">>(</span><span class="identifier">r</span><span class="special">)</span></code>
</p>
</td>
<td>
<p>
Creates a fused function as described above, initializes the
target function with <code class="computeroutput"><span class="identifier">r</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">fused</span><span class="special"><</span><span class="identifier">R</span><span class="special">>()</span></code>
</p>
</td>
<td>
<p>
Creates a fused function as described above, attempts to use
<code class="computeroutput"><span class="identifier">R</span></code>'s default constructor.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></code>
</p>
</td>
<td>
<p>
Calls <code class="computeroutput"><span class="identifier">r</span></code> with
the elements in <code class="computeroutput"><span class="identifier">s</span></code>
as its arguments.
</p>
</td>
</tr>
</tbody>
</table></div>
<a name="fusion.functional.adapters.fused.example"></a><h6>
<a name="id1113015"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.example">Example</a>
</h6>
<pre class="programlisting"><span class="identifier">fused</span><span class="special"><</span> <a href="http://www.sgi.com/tech/stl/plus.html" target="_top"><code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">plus</span></code></a><span class="special"><</span><span class="keyword">long</span><span class="special">></span> <span class="special">></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><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">1</span><span class="special">,</span><span class="number">2l</span><span class="special">))</span> <span class="special">==</span> <span class="number">3l</span><span class="special">);</span>
</pre>
<a name="fusion.functional.adapters.fused.see_also"></a><h6>
<a name="id1113137"></a>
<a class="link" href="fused.html#fusion.functional.adapters.fused.see_also">See also</a>
</h6>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
<a class="link" href="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="fused_function_object.html" title="fused_function_object"><code class="computeroutput"><span class="identifier">fused_function_object</span></code></a>
</li>
<li class="listitem">
<a class="link" href="../invocation/functions/invoke.html" title="invoke"><code class="computeroutput"><span class="identifier">invoke</span></code></a>
</li>
<li class="listitem">
<a class="link" href="../generation/functions/mk_fused.html" title="make_fused"><code class="computeroutput"><span class="identifier">make_fused</span></code></a>
</li>
<li class="listitem">
<a class="link" href="../../support/deduce.html" title="deduce"><code class="computeroutput"><span class="identifier">deduce</span></code></a>
</li>
</ul></div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 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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