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| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="fusion.functional.adapters.unfused"></a><a class="link" href="unfused.html" title="unfused">unfused</a> |
| </h4></div></div></div> |
| <a name="fusion.functional.adapters.unfused.description"></a><h6> |
| <a name="id1084319"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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> of references that is passed to the target function |
| object. |
| </p> |
| <p> |
| The nullary overload of the call operator can be removed by setting the |
| second template parameter to <code class="computeroutput"><span class="keyword">false</span></code>, |
| which is very useful if the result type computation would result in a compile |
| error, otherwise (nullary call operator's prototypes can't be templates |
| and thus are instantiated as early as the class template). |
| </p> |
| <p> |
| Only LValue arguments are accepted. To overcome this limitation, apply |
| <a href="http://www.boost.org/libs/functional/forward/doc/html/index.html" target="_top">Boost.Functional/Forward</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> |
| <a name="fusion.functional.adapters.unfused.header"></a><h6> |
| <a name="id1084378"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <a name="fusion.functional.adapters.unfused.synopsis"></a><h6> |
| <a name="id1084447"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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">bool</span> <span class="identifier">AllowNullary</span> <span class="special">=</span> <span class="keyword">true</span><span class="special">></span> |
| <span class="keyword">class</span> <span class="identifier">unfused</span><span class="special">;</span> |
| </pre> |
| <a name="fusion.functional.adapters.unfused.template_parameters"></a><h6> |
| <a name="id1084522"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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">AllowNullary</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| Boolean constant |
| </p> |
| </td> |
| <td> |
| <p> |
| true |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <a name="fusion.functional.adapters.unfused.model_of"></a><h6> |
| <a name="id1084781"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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">UL</span></code></span></dt> |
| <dd><p> |
| The type <code class="computeroutput"><span class="identifier">unfused</span><span class="special"><</span><span class="identifier">F</span><span class="special">></span></code> |
| </p></dd> |
| <dt><span class="term"><code class="computeroutput"><span class="identifier">ul</span></code></span></dt> |
| <dd><p> |
| An instance of <code class="computeroutput"><span class="identifier">UL</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">ul</span></code> |
| </p></dd> |
| </dl> |
| </div> |
| <a name="fusion.functional.adapters.unfused.expression_semantics"></a><h6> |
| <a name="id1084984"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.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">UL</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">UL</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">ul</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 |
| a <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> that contains |
| references to the arguments <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.example"></a><h6> |
| <a name="id1085182"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.example">Example</a> |
| </h6> |
| <pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">fused_incrementer</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">struct</span> <span class="identifier">result</span> |
| <span class="special">{</span> |
| <span class="keyword">typedef</span> <span class="keyword">void</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">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> |
| <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><span class="identifier">s</span><span class="special">,++</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">lambda</span><span class="special">::</span><span class="identifier">_1</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> |
| <span class="identifier">unfused</span><span class="special"><</span><span class="identifier">fused_incrementer</span><span class="special">></span> <span class="identifier">increment</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="identifier">increment</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">3</span> <span class="special">&&</span> <span class="identifier">b</span> <span class="special">==</span> <span class="char">'Y'</span><span class="special">);</span> |
| <span class="special">}</span> |
| </pre> |
| <a name="fusion.functional.adapters.unfused.see_also"></a><h6> |
| <a name="id1085549"></a> |
| <a class="link" href="unfused.html#fusion.functional.adapters.unfused.see_also">See also</a> |
| </h6> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <a class="link" href="unfused_typed.html" title="unfused_typed"><code class="computeroutput"><span class="identifier">unfused_typed</span></code></a> |
| </li> |
| <li class="listitem"> |
| <a class="link" href="../generation/functions/mk_unfused.html" title="make_unfused"><code class="computeroutput"><span class="identifier">make_unfused</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> |
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