<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>unfused_typed</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="unfused.html" title="unfused"> <link rel="next" href="limits.html" title="Limits"> </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="unfused.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="limits.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.unfused_typed"></a><a class="link" href="unfused_typed.html" title="unfused_typed">unfused_typed</a> </h4></div></div></div> <a name="fusion.functional.adapters.unfused_typed.description"></a><h6> <a name="id1119434"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.description">Description</a> </h6> <p> An n-ary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function Object</a> adapter template for an unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function Object</a> target function. When called, its arguments are bundled to a <a class="link" href="../../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random Access Sequence</a> that is passed to the target function object. </p> <p> The call operators of esulting function objects are strictly typed (in other words, non-templatized) with the types from a <a class="link" href="../../sequence.html" title="Sequence">Sequence</a>. </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 if the target function object is const - or, in case the target function object is held by value, the adapter is const). </p> <div class="sidebar"> <p class="title"><b></b></p> <p> <span class="inlinemediaobject"><img src="../../../images/note.png" alt="note"></span> For Microsoft Visual C++ 7.1 (Visual Studio 2003) the detection of the Function Object's const qualification easily causes an internal error. Therefore the adapter is always treated as if it was const. </p> </div> <div class="sidebar"> <p class="title"><b></b></p> <p> <span class="inlinemediaobject"><img src="../../../images/tip.png" alt="tip"></span> If the type sequence passed to this template contains non-reference elements, the element is copied only once - the call operator's signature is optimized automatically to avoid by-value parameters. </p> </div> <a name="fusion.functional.adapters.unfused_typed.header"></a><h6> <a name="id1119528"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.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">unfused_typed</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> </pre> <a name="fusion.functional.adapters.unfused_typed.synopsis"></a><h6> <a name="id1119598"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.synopsis">Synopsis</a> </h6> <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Function</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Sequence</span><span class="special">></span> <span class="keyword">class</span> <span class="identifier">unfused_typed</span><span class="special">;</span> </pre> <a name="fusion.functional.adapters.unfused_typed.template_parameters"></a><h6> <a name="id1119665"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.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 unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function Object</a> </p> </td> <td> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">Sequence</span></code> </p> </td> <td> <p> A <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> </p> </td> <td> </td> </tr> </tbody> </table></div> <a name="fusion.functional.adapters.unfused_typed.model_of"></a><h6> <a name="id1119790"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.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">F</span></code></span></dt> <dd><p> A possibly const qualified, unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function Object</a> type or reference type thereof </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt> <dd><p> An object convertible to <code class="computeroutput"><span class="identifier">F</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 parameter types </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">UT</span></code></span></dt> <dd><p> The type <code class="computeroutput"><span class="identifier">unfused_typed</span><span class="special"><</span><span class="identifier">F</span><span class="special">,</span><span class="identifier">S</span><span class="special">></span></code> </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">ut</span></code></span></dt> <dd><p> An instance of <code class="computeroutput"><span class="identifier">UT</span></code>, initialized with <code class="computeroutput"><span class="identifier">f</span></code> </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code></span></dt> <dd><p> Arguments to <code class="computeroutput"><span class="identifier">ut</span></code>, convertible to the types in <code class="computeroutput"><span class="identifier">S</span></code> </p></dd> </dl> </div> <a name="fusion.functional.adapters.unfused_typed.expression_semantics"></a><h6> <a name="id1120033"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.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">UT</span><span class="special">(</span><span class="identifier">f</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">f</span></code>. </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">UT</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">F</span></code>'s default constructor. </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">ut</span><span class="special">(</span><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span><span class="special">)</span></code> </p> </td> <td> <p> Calls <code class="computeroutput"><span class="identifier">f</span></code> with an instance of <code class="computeroutput"><span class="identifier">S</span></code> (or a subsequence of <code class="computeroutput"><span class="identifier">S</span></code> starting at the first element, if fewer arguments are given and the overload hasn't been disabled) initialized with <code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code>. </p> </td> </tr> </tbody> </table></div> <a name="fusion.functional.adapters.unfused_typed.example"></a><h6> <a name="id1120242"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.example">Example</a> </h6> <pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">add_assign</span> <span class="comment">// applies operator+= </span><span class="special">{</span> <span class="keyword">typedef</span> <span class="keyword">void</span> <span class="identifier">result_type</span><span class="special">;</span> <span class="comment">// for simplicity </span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">></span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span> <span class="special">&</span> <span class="identifier">lhs</span><span class="special">,</span> <span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">rhs</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="identifier">lhs</span> <span class="special">+=</span> <span class="identifier">rhs</span><span class="special">;</span> <span class="special">}</span> <span class="special">};</span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Tie</span><span class="special">></span> <span class="keyword">class</span> <span class="identifier">fused_parallel_adder</span> <span class="special">{</span> <span class="identifier">Tie</span> <span class="identifier">tie_dest</span><span class="special">;</span> <span class="keyword">public</span><span class="special">:</span> <span class="keyword">explicit</span> <span class="identifier">fused_parallel_adder</span><span class="special">(</span><span class="identifier">Tie</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">dest</span><span class="special">)</span> <span class="special">:</span> <span class="identifier">tie_dest</span><span class="special">(</span><span class="identifier">dest</span><span class="special">)</span> <span class="special">{</span> <span class="special">}</span> <span class="keyword">typedef</span> <span class="keyword">void</span> <span class="identifier">result_type</span><span class="special">;</span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span> <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">)</span> <span class="keyword">const</span> <span class="special">{</span> <span class="identifier">for_each</span><span class="special">(</span> <span class="identifier">zip</span><span class="special">(</span><span class="identifier">tie_dest</span><span class="special">,</span><span class="identifier">s</span><span class="special">),</span> <span class="identifier">fused</span><span class="special"><</span><span class="identifier">add_assign</span><span class="special">>()</span> <span class="special">);</span> <span class="special">}</span> <span class="special">};</span> <span class="comment">// accepts a tie and creates a typed function object from it </span><span class="keyword">struct</span> <span class="identifier">fused_parallel_adder_maker</span> <span class="special">{</span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sig</span><span class="special">></span> <span class="keyword">struct</span> <span class="identifier">result</span><span class="special">;</span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Self</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span> <span class="keyword">struct</span> <span class="identifier">result</span><span class="special"><</span> <span class="identifier">Self</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">></span> <span class="special">{</span> <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">remove_reference</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">seq</span><span class="special">;</span> <span class="keyword">typedef</span> <span class="identifier">unfused_typed</span><span class="special"><</span> <span class="identifier">fused_parallel_adder</span><span class="special"><</span><span class="identifier">seq</span><span class="special">>,</span> <span class="keyword">typename</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">transform</span><span class="special"><</span><span class="identifier">seq</span><span class="special">,</span> <span class="identifier">remove_reference</span><span class="special"><</span><span class="identifier">_</span><span class="special">></span> <span class="special">>::</span><span class="identifier">type</span> <span class="special">></span> <span class="identifier">type</span><span class="special">;</span> <span class="special">};</span> <span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span> <span class="keyword">typename</span> <span class="identifier">result</span><span class="special"><</span> <span class="keyword">void</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">type</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">Seq</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">tie</span><span class="special">)</span> <span class="special">{</span> <span class="keyword">return</span> <span class="keyword">typename</span> <span class="identifier">result</span><span class="special"><</span> <span class="keyword">void</span><span class="special">(</span><span class="identifier">Seq</span><span class="special">)</span> <span class="special">>::</span><span class="identifier">type</span><span class="special">(</span> <span class="identifier">fused_parallel_adder</span><span class="special"><</span><span class="identifier">Seq</span><span class="special">>(</span><span class="identifier">tie</span><span class="special">)</span> <span class="special">);</span> <span class="special">}</span> <span class="special">};</span> <span class="identifier">unfused</span><span class="special"><</span><span class="identifier">fused_parallel_adder_maker</span><span class="special">></span> <span class="identifier">parallel_add</span><span class="special">;</span> <span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span> <span class="special">{</span> <span class="keyword">int</span> <span class="identifier">a</span> <span class="special">=</span> <span class="number">2</span><span class="special">;</span> <span class="keyword">char</span> <span class="identifier">b</span> <span class="special">=</span> <span class="char">'X'</span><span class="special">;</span> <span class="comment">// the second call is strictly typed with the types deduced from the </span> <span class="comment">// first call </span> <span class="identifier">parallel_add</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)(</span><span class="number">3</span><span class="special">,</span><span class="number">2</span><span class="special">);</span> <span class="identifier">parallel_add</span><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">)(</span><span class="number">3</span><span class="special">);</span> <span class="identifier">parallel_add</span><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">assert</span><span class="special">(</span><span class="identifier">a</span> <span class="special">==</span> <span class="number">8</span> <span class="special">&&</span> <span class="identifier">b</span> <span class="special">==</span> <span class="char">'Z'</span><span class="special">);</span> <span class="special">}</span> </pre> <a name="fusion.functional.adapters.unfused_typed.see_also"></a><h6> <a name="id1121355"></a> <a class="link" href="unfused_typed.html#fusion.functional.adapters.unfused_typed.see_also">See also</a> </h6> <div class="itemizedlist"><ul class="itemizedlist" type="disc"> <li class="listitem"> <a class="link" href="unfused.html" title="unfused"><code class="computeroutput"><span class="identifier">unfused</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> <li class="listitem"> <a class="link" href="../../support/deduce_sequence.html" title="deduce_sequence"><code class="computeroutput"><span class="identifier">deduce_sequence</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="unfused.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="limits.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>