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236 lines
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.functional.adapters.unfused_rvalue_args"></a><a href="unfused_rvalue_args.html" title="unfused_rvalue_args">unfused_rvalue_args</a></h4></div></div></div>
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<a name="fusion.functional.adapters.unfused_rvalue_args.description"></a><h5>
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<a name="id1216864"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.description">Description</a>
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</h5>
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<p>
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An n-ary <a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic Function
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Object</a> adapter template for an unary <a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic
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Function Object</a> target function. When called, its arguments are
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bundled to a <a href="../../sequences/concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a> of references that is passed to the target function
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object. All referenced objects in the sequence are const qualified.
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</p>
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<p>
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The overload set of the adapter's function call operator can be restricted
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by removing the <code class="computeroutput"><span class="identifier">type</span></code> member
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from the nested result metafunction of the <a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic
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Function Object</a> (in this case the substitution-failure-is-not-an-error
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principle applies for non-nullary calls and nullary calls are explicitly
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disabled by the library).
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</p>
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<div class="caution"><table border="0" summary="Caution">
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<tr>
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<td rowspan="2" align="center" valign="top" width="25"><img alt="[Caution]" src="../../../images/caution.png"></td>
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<th align="left">Caution</th>
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</tr>
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<tr><td align="left" valign="top"><p>
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As the nullary call operator cannot be a template it will be instantiated
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along with the class template, so it must be disabled (as described above)
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in cases where it isn't instantiable.
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</p></td></tr>
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</table></div>
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<p>
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The type of the target function is allowed to be const qualified or a reference.
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Const qualification is preserved and propagated appropriately (in other
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words, only const versions of <code class="literal">operator()</code> can be used
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if the target function object is const - or, in case the target function
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object is held by value, the adapter is const).
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</p>
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<a name="fusion.functional.adapters.unfused_rvalue_args.header"></a><h5>
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<a name="id1216972"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.header">Header</a>
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</h5>
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<pre class="programlisting">
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<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_rvalue_args</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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<a name="fusion.functional.adapters.unfused_rvalue_args.synopsis"></a><h5>
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<a name="id1217065"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.synopsis">Synopsis</a>
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</h5>
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<pre class="programlisting">
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Function</span><span class="special">></span>
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<span class="keyword">class</span> <span class="identifier">unfused_rvalue_args</span><span class="special">;</span>
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</pre>
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<a name="fusion.functional.adapters.unfused_rvalue_args.template_parameters"></a><h5>
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<a name="id1217138"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.template_parameters">Template
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parameters</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>Parameter</th>
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<th>Description</th>
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<th>Default</th>
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</tr></thead>
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<tbody><tr>
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<td><code class="computeroutput"><span class="identifier">Function</span></code></td>
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<td>A
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unary <a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic
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Function Object</a>
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</td>
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<td><EFBFBD></td>
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</tr></tbody>
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</table></div>
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<a name="fusion.functional.adapters.unfused_rvalue_args.model_of"></a><h5>
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<a name="id1217213"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.model_of">Model
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of</a>
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</h5>
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<div class="itemizedlist"><ul type="disc">
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<li><a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic Function
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Object</a></li>
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<li><a href="../concepts/def_callable.html" title=" Deferred
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Callable Object">Deferred Callable
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Object</a></li>
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</ul></div>
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<div class="variablelist">
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<p class="title"><b>Notation</b></p>
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<dl>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">F</span></code></span></dt>
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<dd>
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A possibly const qualified, unary <a href="../concepts/poly.html" title=" Polymorphic Function
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Object">Polymorphic
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Function Object</a> type or reference type thereof
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
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<dd>
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An object convertible to <code class="computeroutput"><span class="identifier">F</span></code>
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">UR</span></code></span></dt>
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<dd>
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The type <code class="computeroutput"><span class="identifier">unfused_rvalue_args</span><span class="special"><</span><span class="identifier">F</span><span class="special">></span></code>
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">ur</span></code></span></dt>
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<dd>
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An instance of <code class="computeroutput"><span class="identifier">UR</span></code>, initialized
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with <code class="computeroutput"><span class="identifier">f</span></code>
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code></span></dt>
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<dd>
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Arguments to <code class="computeroutput"><span class="identifier">ur</span></code>
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</dd>
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</dl>
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</div>
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<a name="fusion.functional.adapters.unfused_rvalue_args.expression_semantics"></a><h5>
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<a name="id1217423"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.expression_semantics">Expression
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Semantics</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>Expression</th>
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<th>Semantics</th>
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</tr></thead>
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<tbody>
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<tr>
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<td><code class="computeroutput"><span class="identifier">UR</span><span class="special">(</span><span class="identifier">f</span><span class="special">)</span></code></td>
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<td>Creates
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a fused function as described above, initializes the target function
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with <code class="computeroutput"><span class="identifier">f</span></code>.</td>
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</tr>
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<tr>
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<td><code class="computeroutput"><span class="identifier">UR</span><span class="special">()</span></code></td>
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<td>Creates
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a fused function as described above, attempts to use <code class="computeroutput"><span class="identifier">F</span></code>'s default constructor.</td>
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</tr>
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<tr>
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<td>
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<code class="computeroutput"><span class="identifier">ur</span><span class="special">(</span><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span><span class="special">)</span></code>
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</td>
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<td>Calls <code class="computeroutput"><span class="identifier">f</span></code> with a <a href="../../sequences.html" title="Sequences">Sequence</a>
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that contains references to the arguments <code class="computeroutput"><span class="identifier">a0</span></code>...<code class="computeroutput"><span class="identifier">aN</span></code>.</td>
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</tr>
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</tbody>
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</table></div>
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<a name="fusion.functional.adapters.unfused_rvalue_args.example"></a><h5>
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<a name="id1217611"></a>
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.example">Example</a>
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</h5>
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<pre class="programlisting">
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<span class="keyword">struct</span> <span class="identifier">sequence_printer</span>
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<span class="special">{</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">result</span>
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<span class="special">{</span>
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<span class="keyword">typedef</span> <span class="keyword">void</span> <span class="identifier">type</span><span class="special">;</span>
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<span class="special">};</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">Seq</span><span class="special">></span>
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<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>
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<span class="special">{</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">s</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
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<span class="special">}</span>
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<span class="special">};</span>
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<span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span>
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<span class="special">{</span>
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<span class="identifier">unfused_rvalue_args</span><span class="special"><</span><span class="identifier">sequence_printer</span><span class="special">></span> <span class="identifier">print</span><span class="special">;</span>
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<span class="identifier">print</span><span class="special">(</span><span class="number">24</span><span class="special">,</span><span class="string">"bottles of beer in"</span><span class="special">,</span><span class="char">'a'</span><span class="special">,</span><span class="string">"box."</span><span class="special">);</span>
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<span class="special">}</span>
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</pre>
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<a name="fusion.functional.adapters.unfused_rvalue_args.see_also"></a><h5>
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<a name="id1217963"></a>
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|||
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<a href="unfused_rvalue_args.html#fusion.functional.adapters.unfused_rvalue_args.see_also">See
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also</a>
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|||
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</h5>
|
|||
|
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<div class="itemizedlist"><ul type="disc">
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|||
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<li><a href="unfused_lvalue_args.html" title="unfused_lvalue_args"><code class="computeroutput"><span class="identifier">unfused_lvalue_args</span></code></a></li>
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|||
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<li><a href="unfused_generic.html" title="unfused_generic"><code class="computeroutput"><span class="identifier">unfused_generic</span></code></a></li>
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<li><a href="unfused_typed.html" title="unfused_typed"><code class="computeroutput"><span class="identifier">unfused_typed</span></code></a></li>
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<li><a href="../../support/deduce.html" title="deduce"><code class="computeroutput"><span class="identifier">deduce</span></code></a></li>
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<li><a href="../../support/deduce_sequence.html" title="deduce_sequence"><code class="computeroutput"><span class="identifier">deduce_sequence</span></code></a></li>
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</ul></div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><small>Copyright <20> 2001-2005 Joel de Guzman, Dan Marsden</small></td>
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</tr></table>
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<hr>
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<div class="spirit-nav">
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<a accesskey="p" href="unfused_lvalue_args.html"><img src="../../../images/prev.png" alt="Prev"></a><a accesskey="u" href="../adapters.html"><img src="../../../images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../images/home.png" alt="Home"></a><a accesskey="n" href="unfused_typed.html"><img src="../../../images/next.png" alt="Next"></a>
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</body>
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</html>
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