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| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.functional.adapters.fused_function_object"></a><a class="link" href="fused_function_object.html" title="fused_function_object">fused_function_object</a> |
| </h4></div></div></div> |
| <a name="fusion.functional.adapters.fused_function_object.description"></a><h6> |
| <a name="id1082808"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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 <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic |
| Function Object</a> target function. 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 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 an target function object that is const or, if the target function |
| object is held by value, the adapter is const). |
| </p> |
| <a name="fusion.functional.adapters.fused_function_object.header"></a><h6> |
| <a name="id1082851"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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_function_object</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_function_object.synopsis"></a><h6> |
| <a name="id1082923"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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">fused_function_object</span><span class="special">;</span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_function_object.template_parameters"></a><h6> |
| <a name="id1082977"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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/poly.html" title="Polymorphic Function Object">Polymorphic Function |
| Object</a> type |
| </p> |
| </td> |
| <td> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <a name="fusion.functional.adapters.fused_function_object.model_of"></a><h6> |
| <a name="id1083068"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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/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">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_function_object.expression_semantics"></a><h6> |
| <a name="id1083238"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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_function_object</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_function_object</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_function_object.example"></a><h6> |
| <a name="id1083433"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.example">Example</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">SeqOfSeqs</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Func</span><span class="special">></span> |
| <span class="keyword">typename</span> <a class="link" href="../../algorithm/transformation/metafunctions/transform.html" title="transform"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">transform</span></code></a><span class="special"><</span> <span class="identifier">zip_view</span><span class="special"><</span><span class="identifier">SeqOfSeqs</span><span class="special">></span> <span class="keyword">const</span><span class="special">,</span> |
| <span class="identifier">fused_function_object</span><span class="special"><</span><span class="identifier">Func</span> <span class="keyword">const</span> <span class="special">&></span> <span class="special">>::</span><span class="identifier">type</span> |
| <span class="identifier">n_ary_transform</span><span class="special">(</span><span class="identifier">SeqOfSeqs</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> |
| <span class="keyword">return</span> <a class="link" href="../../algorithm/transformation/functions/transform.html" title="transform"><code class="computeroutput"><span class="identifier">transform</span></code></a><span class="special">(</span><span class="identifier">zip_view</span><span class="special"><</span><span class="identifier">SeqOfSeqs</span><span class="special">>(</span><span class="identifier">s</span><span class="special">),</span> |
| <span class="identifier">fused_function_object</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">struct</span> <span class="identifier">sub</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">typename</span> <span class="identifier">T</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">T</span><span class="special">,</span><span class="identifier">T</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">T</span><span class="special">>::</span><span class="identifier">type</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">typename</span> <span class="identifier">T</span><span class="special">></span> |
| <span class="identifier">T</span> <span class="keyword">operator</span><span class="special">()(</span><span class="identifier">T</span> <span class="identifier">lhs</span><span class="special">,</span> <span class="identifier">T</span> <span class="identifier">rhs</span><span class="special">)</span> <span class="keyword">const</span> |
| <span class="special">{</span> |
| <span class="keyword">return</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">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> |
| <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">c</span><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="identifier">assert</span><span class="special">(</span><span class="identifier">c</span> <span class="special">==</span> <span class="identifier">n_ary_transform</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">sub</span><span class="special">()));</span> |
| <span class="special">}</span> |
| </pre> |
| <a name="fusion.functional.adapters.fused_function_object.see_also"></a><h6> |
| <a name="id1084205"></a> |
| <a class="link" href="fused_function_object.html#fusion.functional.adapters.fused_function_object.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_procedure.html" title="fused_procedure"><code class="computeroutput"><span class="identifier">fused_procedure</span></code></a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../invocation/functions/invoke_fobj.html" title="invoke_function_object"><code class="computeroutput"><span class="identifier">invoke_function_object</span></code></a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../generation/functions/mk_fused_fobj.html" title="make_fused_function_object"><code class="computeroutput"><span class="identifier">make_fused_function_object</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> |
| </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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