| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> |
| <title>fused_procedure</title> |
| <link rel="stylesheet" href="../../../../../../../doc/src/boostbook.css" type="text/css"> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> |
| <link rel="home" href="../../../index.html" title="Chapter 1. Fusion 2.0"> |
| <link rel="up" href="../adapters.html" title="Adapters"> |
| <link rel="prev" href="fused.html" title="fused"> |
| <link rel="next" href="fused_function_object.html" title="fused_function_object"> |
| </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.html">Home</a></td> |
| <td align="center"><a href="../../../../../../../libs/libraries.htm">Libraries</a></td> |
| <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> |
| <td align="center"><a href="http://www.boost.org/users/faq.html">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="fused.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../adapters.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="fused_function_object.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.functional.adapters.fused_procedure"></a><a class="link" href="fused_procedure.html" title="fused_procedure">fused_procedure</a> |
| </h4></div></div></div> |
| <a name="fusion.functional.adapters.fused_procedure.description"></a><h6> |
| <a name="id1081609"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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/callable.html" title="Callable Object">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 result is discared and the adapter's return type is <code class="computeroutput"><span class="keyword">void</span></code>. |
| </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 members function, 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> |
| <p> |
| The target function must not be a pointer to a member object (dereferencing |
| such a pointer without returning anything does not make sense, so this |
| case is not implemented). |
| </p> |
| <a name="fusion.functional.adapters.fused_procedure.header"></a><h6> |
| <a name="id1081699"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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_procedure</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_procedure.synopsis"></a><h6> |
| <a name="id1081768"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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_procedure</span><span class="special">;</span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_procedure.template_parameters"></a><h6> |
| <a name="id1081822"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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 class="link" href="../concepts/callable.html" title="Callable Object">Callable |
| Object</a> type |
| </p> |
| </td> |
| <td> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="fusion.functional.adapters.fused_procedure.model_of"></a><h6> |
| <a name="id1081913"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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/callable.html" title="Callable Object">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_procedure.expression_semantics"></a><h6> |
| <a name="id1082083"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.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_procedure</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_procedure</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_procedure.example"></a><h6> |
| <a name="id1082278"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.example">Example</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">SequenceOfSequences</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Func</span><span class="special">></span> |
| <span class="keyword">void</span> <span class="identifier">n_ary_for_each</span><span class="special">(</span><span class="identifier">SequenceOfSequences</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span> <span class="identifier">Func</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">f</span><span class="special">)</span> |
| <span class="special">{</span> |
| <a class="link" href="../../algorithm/iteration/functions/for_each.html" title="for_each"><code class="computeroutput"><span class="identifier">for_each</span></code></a><span class="special">(</span><a class="link" href="../../view/zip_view.html" title="zip_view"><code class="computeroutput"><span class="identifier">zip_view</span></code></a><span class="special"><</span><span class="identifier">SequenceOfSequences</span><span class="special">>(</span><span class="identifier">s</span><span class="special">),</span> |
| <span class="identifier">fused_procedure</span><span class="special"><</span><span class="identifier">Func</span> <span class="keyword">const</span> <span class="special">&>(</span><span class="identifier">f</span><span class="special">));</span> |
| <span class="special">}</span> |
| |
| <span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span> |
| <span class="special">{</span> |
| <a class="link" href="../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">></span> <span class="identifier">a</span><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">2.0f</span><span class="special">);</span> |
| <a class="link" href="../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">></span> <span class="identifier">b</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">1.5f</span><span class="special">);</span> |
| <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lambda</span><span class="special">;</span> |
| <span class="identifier">n_ary_for_each</span><span class="special">(</span><a class="link" href="../../container/generation/functions/vector_tie.html" title="vector_tie"><code class="computeroutput"><span class="identifier">vector_tie</span></code></a><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">),</span> <span class="identifier">_1</span> <span class="special">-=</span> <span class="identifier">_2</span><span class="special">);</span> |
| <span class="identifier">assert</span><span class="special">(</span><span class="identifier">a</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">0.5f</span><span class="special">));</span> |
| <span class="special">}</span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_procedure.see_also"></a><h6> |
| <a name="id1082711"></a> |
| <a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.see_also">See |
| also</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <a class="link" href="fused.html" title="fused"><code class="computeroutput"><span class="identifier">fused</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_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">invoke_procedure</span></code></a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../generation/functions/mk_fused_proc.html" title="make_fused_procedure"><code class="computeroutput"><span class="identifier">make_fused_procedure</span></code></a> |
| </li> |
| </ul></div> |
| </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="fused.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../adapters.html"><img src="../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="fused_function_object.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> |
| </div> |
| </body> |
| </html> |
