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| <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="id1085610"></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="id1085704"></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="id1085773"></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="id1085841"></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="id1085965"></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="id1086209"></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="id1086418"></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="id1089856"></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> |
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