boost_fusion/doc/html/fusion/functional/concepts/poly.html

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title> Polymorphic Function
        Object</title>
<link rel="stylesheet" href="../../../../../../../doc/html/boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.66.1">
<link rel="start" href="../../../index.html" title="Chapter 1. Fusion 2.0">
<link rel="up" href="../concepts.html" title="Concepts">
<link rel="prev" href="def_callable.html" title=" Deferred
        Callable Object">
<link rel="next" href="../invocation.html" title="Invocation">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table cellpadding="2" width="100%"><tr>
<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
<td align="center"><a href="../../../../../../../index.htm">Home</a></td>
<td align="center"><a href="../../../../../../libraries.htm">Libraries</a></td>
<td align="center"><a href="../../../../../../../people/people.htm">People</a></td>
<td align="center"><a href="../../../../../../../more/faq.htm">FAQ</a></td>
<td align="center"><a href="../../../../../../../more/index.htm">More</a></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="def_callable.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="../invocation.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.functional.concepts.poly"></a><a href="poly.html" title=" Polymorphic Function
        Object"> Polymorphic Function
        Object</a></h4></div></div></div>
<a name="fusion.functional.concepts.poly.description"></a><h5>
<a name="id656841"></a>
          <a href="poly.html#fusion.functional.concepts.poly.description">Description</a>
        </h5>
<p>
          A non-member-pointer <a href="def_callable.html" title=" Deferred
        Callable Object">Deferred
          Callable Object</a> type.
        </p>
<a name="fusion.functional.concepts.poly.refinement_of"></a><h5>
<a name="id656880"></a>
          <a href="poly.html#fusion.functional.concepts.poly.refinement_of">Refinement
          of</a>
        </h5>
<div class="itemizedlist"><ul type="disc">
<li><a href="reg_callable.html" title=" Regular Callable
        Object">Regular Callable
            Object</a></li>
<li><a href="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"><tt class="computeroutput"><span class="identifier">F</span></tt></span></dt>
<dd><p>
              A possibly const-qualified Polymorphic Function Object type
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">f</span></tt></span></dt>
<dd><p>
              An object or reference to an object of type F
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">A1</span>
          <span class="special">...</span><span class="identifier">AN</span></tt></span></dt>
<dd><p>
              Argument types
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">a1</span>
          <span class="special">...</span><span class="identifier">aN</span></tt></span></dt>
<dd><p>
              Objects or references to objects with types <tt class="computeroutput"><span class="identifier">A1</span>
              <span class="special">...</span><span class="identifier">AN</span></tt>
            </p></dd>
<dt><span class="term"><tt class="computeroutput"><span class="identifier">T1</span>
          <span class="special">...</span><span class="identifier">TN</span></tt></span></dt>
<dd><p>
              <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">&amp;</span></tt>
              if <tt class="computeroutput"><span class="identifier">a</span></tt>i is an LValue,
              same as <tt class="computeroutput"><span class="identifier">A</span></tt>i, otherwise
            </p></dd>
</dl>
</div>
<a name="fusion.functional.concepts.poly.expression_requirements"></a><h5>
<a name="id657171"></a>
          <a href="poly.html#fusion.functional.concepts.poly.expression_requirements">Expression
          requirements</a>
        </h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Expression
                </p>
                </th>
<th>
                <p>
                  Return Type
                </p>
                </th>
<th>
                <p>
                  Runtime Complexity
                </p>
                </th>
</tr></thead>
<tbody><tr>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">a1</span><span class="special">,</span>
                  <span class="special">...</span><span class="identifier">aN</span><span class="special">)</span></tt>
                </p>
                </td>
<td>
                <p>
                  <tt class="computeroutput"><span class="identifier">result_of</span><span class="special">&lt;</span>
                  <span class="identifier">F</span><span class="special">(</span><span class="identifier">T1</span><span class="special">,</span>
                  <span class="special">...</span><span class="identifier">TN</span><span class="special">)</span> <span class="special">&gt;::</span><span class="identifier">type</span></tt>
                </p>
                </td>
<td>
                <p>
                  Unspecified
                </p>
                </td>
</tr></tbody>
</table></div>
<a name="fusion.functional.concepts.poly.models"></a><h5>
<a name="id657369"></a>
          <a href="poly.html#fusion.functional.concepts.poly.models">Models</a>
        </h5>
<div class="itemizedlist"><ul type="disc">
<li>
            function pointers
          </li>
<li>
            function objects of the Standard Library
          </li>
<li>
            all Fusion <a href="../adapters.html" title=" Adapters">functional adapters</a>
</li>
</ul></div>
<a name="fusion.functional.concepts.poly.examples"></a><h5>
<a name="id657423"></a>
          <a href="poly.html#fusion.functional.concepts.poly.examples">Examples</a>
        </h5>
<pre class="programlisting">
<span class="special">&amp;</span> <span class="identifier">a_free_function</span>
<span class="special">&amp;</span> <span class="identifier">a_class</span><span class="special">::</span><span class="identifier">a_static_member_function</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">less</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;()</span>
<span class="comment">// using namespace boost;
</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">&lt;</span><span class="keyword">int</span><span class="special">&gt;(),</span> <span class="identifier">_1</span><span class="special">,</span> <span class="number">5</span><span class="special">)</span>
<span class="comment">// Note: Boost.Lambda expressions don't work with __boost_result_of__
</span><span class="identifier">fusion</span><span class="special">::</span><a href="../generation/functions/mk_fused_fobj.html" title="
          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">&lt;</span><span class="keyword">int</span><span class="special">&gt;())</span>
</pre>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<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>
</div></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="def_callable.html"><img src="../../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.html"><img src="../../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="../invocation.html"><img src="../../../../../../../doc/html/images/next.png" alt="Next"></a>
</div>
</body>
</html>