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104 lines
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<a name="PolymorphicFunctionObject"></a><div class="titlepage"></div>
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<div class="refnamediv">
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<h2><span class="refentrytitle">Concept PolymorphicFunctionObject</span></h2>
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<p>PolymorphicFunctionObject</p>
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</div>
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<div class="refsect1">
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<a name="id-1.3.34.5.63.3"></a><h2>Description</h2>
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<p>
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A type that can be called and that follows the TR1 ResultOf
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protocol for return type calculation.
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</p>
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</div>
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<div class="refsect1">
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<a name="id-1.3.34.5.63.4"></a><h2>Associated types</h2>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
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<p><span class="bold"><strong>result_type</strong></span></p>
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<pre class="literallayout">result_of<Fn(A0,...An)>::type</pre>
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<p>
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</p>
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<p>The result of calling the Polymorphic Function Object.</p>
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<p>
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</p>
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</li></ul></div>
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</div>
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<div class="refsect1">
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<a name="id-1.3.34.5.63.5"></a><h2>Notation</h2>
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<div class="variablelist"><dl class="variablelist">
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<dt><span class="term">Fn</span></dt>
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<dd>A type playing the role of polymorphic-function-object-type in the <a class="link" href="PolymorphicFunctionObject.html" title="Concept PolymorphicFunctionObject">PolymorphicFunctionObject</a> concept.</dd>
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<dt><span class="term"><code class="varname">fn</code></span></dt>
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<dd>Object of type Fn</dd>
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<dt><span class="term"><code class="varname">a0,...an</code></span></dt>
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<dd>Object of type A0,...An</dd>
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</dl></div>
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</div>
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<div class="refsect1">
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<a name="id-1.3.34.5.63.6"></a><h2>Valid expressions</h2>
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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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<col>
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</colgroup>
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<thead><tr>
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<th>Name</th>
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<th>Expression</th>
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<th>Type</th>
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<th>Semantics</th>
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</tr></thead>
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<tbody><tr>
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<td><p>Function Call</p></td>
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<td><p>fn(a0,...an)</p></td>
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<td><p><span class="type">result_type</span></p></td>
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<td><p>Calls the function object.</p></td>
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</tr></tbody>
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</table></div>
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</div>
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<div class="refsect1">
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<a name="id-1.3.34.5.63.7"></a><h2>Models</h2>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><span class="simplelist"><span class="type">std::plus<int></span></span></li></ul></div>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<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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