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<title> Polymorphic Function
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Object</title>
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Callable Object">
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.functional.concepts.poly"></a><a href="poly.html" title=" Polymorphic Function
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Object"> Polymorphic Function
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Object</a></h4></div></div></div>
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<a name="fusion.functional.concepts.poly.description"></a><h5>
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<a name="id656328"></a>
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<a href="poly.html#fusion.functional.concepts.poly.description">Description</a>
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</h5>
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<p>
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A non-member-pointer <a href="def_callable.html" title=" Deferred
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Callable Object">Deferred
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Callable Object</a> type.
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</p>
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<a name="fusion.functional.concepts.poly.refinement_of"></a><h5>
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<a name="id656368"></a>
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<a href="poly.html#fusion.functional.concepts.poly.refinement_of">Refinement
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of</a>
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</h5>
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<div class="itemizedlist"><ul type="disc">
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<li><a href="reg_callable.html" title=" Regular Callable
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Object">Regular Callable
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Object</a></li>
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<li><a href="def_callable.html" title=" Deferred
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Callable Object">Deferred Callable
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Object</a></li>
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</ul></div>
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<div class="variablelist">
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<p class="title"><b>Notation</b></p>
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<dl>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">F</span></tt></span></dt>
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<dd><p>
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A possibly const-qualified Polymorphic Function Object type
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">f</span></tt></span></dt>
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<dd><p>
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An object or reference to an object of type F
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">A1</span>
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<span class="special">...</span><span class="identifier">AN</span></tt></span></dt>
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<dd><p>
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Argument types
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">a1</span>
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<span class="special">...</span><span class="identifier">aN</span></tt></span></dt>
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<dd><p>
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Objects or references to objects with types <tt class="computeroutput"><span class="identifier">A1</span>
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<span class="special">...</span><span class="identifier">AN</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">T1</span>
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<span class="special">...</span><span class="identifier">TN</span></tt></span></dt>
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<dd><p>
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<tt class="computeroutput"><span class="identifier">T</span></tt>i is <tt class="computeroutput"><span class="identifier">A</span></tt>i <tt class="computeroutput"><span class="special">&</span></tt>
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if <tt class="computeroutput"><span class="identifier">a</span></tt>i is an LValue,
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same as <tt class="computeroutput"><span class="identifier">A</span></tt>i, otherwise
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</p></dd>
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</dl>
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</div>
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<a name="fusion.functional.concepts.poly.expression_requirements"></a><h5>
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<a name="id656658"></a>
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<a href="poly.html#fusion.functional.concepts.poly.expression_requirements">Expression
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requirements</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Expression
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</p>
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</th>
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<th>
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<p>
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Return Type
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</p>
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</th>
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<th>
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<p>
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Runtime Complexity
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</p>
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</th>
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</tr></thead>
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<tbody><tr>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span>
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<span class="special">...</span><span class="identifier">aN</span><span class="special">)</span></tt>
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</p>
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</td>
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<td>
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<p>
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<tt class="computeroutput"><span class="identifier">result_of</span><span class="special"><</span>
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<span class="identifier">F</span><span class="special">(</span><span class="identifier">T1</span><span class="special">,</span>
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<span class="special">...</span><span class="identifier">TN</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">type</span></tt>
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</p>
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</td>
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<td>
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<p>
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Unspecified
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</p>
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</td>
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</tr></tbody>
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</table></div>
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<a name="fusion.functional.concepts.poly.models"></a><h5>
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<a name="id656856"></a>
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<a href="poly.html#fusion.functional.concepts.poly.models">Models</a>
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</h5>
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<div class="itemizedlist"><ul type="disc">
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<li>
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function pointers
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</li>
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<li>
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function objects of the Standard Library
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</li>
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<li>
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all Fusion <a href="../adapters.html" title=" Adapters">functional adapters</a>
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</li>
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</ul></div>
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<a name="fusion.functional.concepts.poly.examples"></a><h5>
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<a name="id656910"></a>
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<a href="poly.html#fusion.functional.concepts.poly.examples">Examples</a>
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</h5>
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<pre class="programlisting">
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<span class="special">&</span> <span class="identifier">a_free_function</span>
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<span class="special">&</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_static_member_function</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special"><</span><span class="keyword">int</span><span class="special">>()</span>
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<span class="comment">// using namespace boost;
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</span><span class="identifier">bind</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special"><</span><span class="keyword">int</span><span class="special">>(),</span> <span class="identifier">_1</span><span class="special">,</span> <span class="number">5</span><span class="special">)</span>
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<span class="comment">// Note: Boost.Lambda expressions don't work with __boost_result_of__
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</span><span class="identifier">fusion</span><span class="special">::</span><a href="../generation/functions/mk_fused_fobj.html" title="
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make_fused_function_object"><tt class="computeroutput"><span class="identifier">make_fused_function_object</span></tt></a><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special"><</span><span class="keyword">int</span><span class="special">>())</span>
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</pre>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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>)
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</p>
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</div></td>
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</tr></table>
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<hr>
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