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<html>
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<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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h0"></a>
<span><a name="fusion.functional.adapters.unfused_typed.description"></a></span><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">
<div class="titlepage"></div>
<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">
<div class="titlepage"></div>
<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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h1"></a>
<span><a name="fusion.functional.adapters.unfused_typed.header"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h2"></a>
<span><a name="fusion.functional.adapters.unfused_typed.synopsis"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h3"></a>
<span><a name="fusion.functional.adapters.unfused_typed.template_parameters"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h4"></a>
<span><a name="fusion.functional.adapters.unfused_typed.model_of"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h5"></a>
<span><a name="fusion.functional.adapters.unfused_typed.expression_semantics"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h6"></a>
<span><a name="fusion.functional.adapters.unfused_typed.example"></a></span><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>
<h6>
<a name="fusion.functional.adapters.unfused_typed.h7"></a>
<span><a name="fusion.functional.adapters.unfused_typed.see_also"></a></span><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 © 2001-2006, 2011 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>
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