forked from boostorg/fusion
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297 lines
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HTML
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>>>>>>> .merge-right.r57125
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<link rel="home" href="../../index.html" title="Chapter 1. Fusion 2.0">
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<<<<<<< .working
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<div class="section" lang="en">
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<div class="titlepage">
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<div><div><h3 class="title">
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<a name="fusion.view.nview"></a><a href="nview.html" title="nview">nview</a>
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</h3></div></div>
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<div></div>
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</div>
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<a name="fusion.view.nview.description"></a><h4>
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<a name="id528240"></a>
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<a href="nview.html#fusion.view.nview.description">Description</a>
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</h4>
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=======
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<div class="section" title="nview">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="fusion.view.nview"></a><a class="link" href="nview.html" title="nview">nview</a>
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</h3></div></div></div>
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<a name="fusion.view.nview.description"></a><h5>
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<a name="id735048"></a>
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<a class="link" href="nview.html#fusion.view.nview.description">Description</a>
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</h5>
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>>>>>>> .merge-right.r57125
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<p>
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<tt class="computeroutput"><span class="identifier">nview</span></tt> presents a view which
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iterates over a given <a href="../sequence.html" title="Sequence">Sequence</a> in
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a specified order. An <tt class="computeroutput"><span class="identifier">nview</span></tt>
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is constructed from an arbitrary <a href="../sequence.html" title="Sequence">Sequence</a>
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and a list of indicies specifying the elements to iterate over.
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</p>
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<<<<<<< .working
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<a name="fusion.view.nview.header"></a><h4>
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<a name="id528309"></a>
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<a href="nview.html#fusion.view.nview.header">Header</a>
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</h4>
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=======
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<a name="fusion.view.nview.header"></a><h5>
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<a name="id735089"></a>
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<a class="link" href="nview.html#fusion.view.nview.header">Header</a>
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</h5>
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>>>>>>> .merge-right.r57125
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<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">view</span><span class="special">/</span><span class="identifier">nview</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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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">include</span><span class="special">/</span><span class="identifier">nview</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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<<<<<<< .working
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<a name="fusion.view.nview.synopsis"></a><h4>
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<a name="id528464"></a>
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<a href="nview.html#fusion.view.nview.synopsis">Synopsis</a>
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</h4>
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=======
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<a name="fusion.view.nview.synopsis"></a><h5>
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<a name="id736290"></a>
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<a class="link" href="nview.html#fusion.view.nview.synopsis">Synopsis</a>
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</h5>
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>>>>>>> .merge-right.r57125
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<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Indicies</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">nview</span><span class="special">;</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">I1</span><span class="special">,</span> <span class="keyword">int</span> <span class="identifier">I2</span> <span class="special">=</span> <span class="special">-</span><span class="number">1</span><span class="special">,</span> <span class="special">...></span>
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<span class="keyword">typename</span> <span class="identifier">result_of</span><span class="special">::</span><span class="identifier">nview</span><span class="special"><</span><span class="identifier">Sequence</span><span class="special">,</span> <span class="identifier">I1</span><span class="special">,</span> <span class="identifier">I2</span><span class="special">,</span> <span class="special">...>::</span><span class="identifier">type</span>
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<span class="identifier">as_nview</span><span class="special">(</span><span class="identifier">Sequence</span><span class="special">&</span> <span class="identifier">s</span><span class="special">);</span>
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</pre>
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<<<<<<< .working
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<a name="fusion.view.nview.template_parameters"></a><h4>
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<a name="id528750"></a>
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<a href="nview.html#fusion.view.nview.template_parameters">Template parameters</a>
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</h4>
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=======
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<a name="fusion.view.nview.template_parameters"></a><h5>
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<a name="id736497"></a>
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<a class="link" href="nview.html#fusion.view.nview.template_parameters">Template parameters</a>
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</h5>
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>>>>>>> .merge-right.r57125
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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><p>
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Parameter
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</p></th>
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<th><p>
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Description
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</p></th>
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<th><p>
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Default
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</p></th>
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</tr></thead>
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<tbody>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">Sequence</span></tt>
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</p></td>
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<td><p>
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An arbitrary Fusion <a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>
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</p></td>
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<td><p>
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</p></td>
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</tr>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">Indicies</span></tt>
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</p></td>
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<td><p>
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A <tt class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector_c</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="special">...></span></tt> holding the indicies defining
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the required iteration order.
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</p></td>
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<td><p>
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</p></td>
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</tr>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">I1</span></tt>, <tt class="computeroutput"><span class="identifier">I2</span></tt>, <tt class="computeroutput"><span class="identifier">I3</span></tt>...
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</p></td>
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<td><p>
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A list of integers specifying the required iteration order.
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</p></td>
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<td><p>
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<tt class="computeroutput"><span class="identifier">INT_MAX</span></tt> for <tt class="computeroutput"><span class="identifier">I2</span></tt>, <tt class="computeroutput"><span class="identifier">I3</span></tt>...
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</p></td>
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</tr>
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</tbody>
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</table></div>
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<<<<<<< .working
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<a name="fusion.view.nview.model_of"></a><h4>
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<a name="id529035"></a>
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<a href="nview.html#fusion.view.nview.model_of">Model of</a>
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</h4>
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<div class="itemizedlist"><ul type="disc"><li>
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<a href="../sequence/concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a> (see <a href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence
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=======
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<a name="fusion.view.nview.model_of"></a><h5>
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<a name="id736711"></a>
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<a class="link" href="nview.html#fusion.view.nview.model_of">Model of</a>
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</h5>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
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<a class="link" href="../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random
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Access Sequence</a> (see <a class="link" href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence
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>>>>>>> .merge-right.r57125
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Traversal Concept</a>)
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</li></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"><tt class="computeroutput"><span class="identifier">NV</span></tt></span></dt>
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<dd><p>
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A <tt class="computeroutput"><span class="identifier">nview</span></tt> type
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">s</span></tt></span></dt>
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<dd><p>
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An instance of <tt class="computeroutput"><span class="identifier">Sequences</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">nv1</span></tt>,
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<tt class="computeroutput"><span class="identifier">nv2</span></tt></span></dt>
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<dd><p>
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Instances of <tt class="computeroutput"><span class="identifier">NV</span></tt>
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</p></dd>
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</dl>
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</div>
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<<<<<<< .working
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<a name="fusion.view.nview.expression_semantics"></a><h4>
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<a name="id529208"></a>
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<a href="nview.html#fusion.view.nview.expression_semantics">Expression Semantics</a>
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</h4>
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=======
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<a name="fusion.view.nview.expression_semantics"></a><h5>
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<a name="id736831"></a>
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<a class="link" href="nview.html#fusion.view.nview.expression_semantics">Expression Semantics</a>
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</h5>
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>>>>>>> .merge-right.r57125
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<p>
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Semantics of an expression is defined only where it differs from, or is not
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defined in <a href="../sequence/concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a>.
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</p>
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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><p>
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Expression
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</p></th>
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<th><p>
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Semantics
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</p></th>
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</tr></thead>
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<tbody>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">NV</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></tt>
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</p></td>
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<td><p>
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Creates an <tt class="computeroutput"><span class="identifier">nview</span></tt>
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given a sequence and a list of indicies.
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</p></td>
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</tr>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">NV</span><span class="special">(</span><span class="identifier">nv1</span><span class="special">)</span></tt>
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</p></td>
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<td><p>
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Copy constructs an <tt class="computeroutput"><span class="identifier">nview</span></tt>
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from another <tt class="computeroutput"><span class="identifier">nview</span></tt>,
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<tt class="computeroutput"><span class="identifier">nv1</span></tt>.
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</p></td>
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</tr>
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<tr>
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<td><p>
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<tt class="computeroutput"><span class="identifier">nv1</span> <span class="special">=</span>
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<span class="identifier">nv2</span></tt>
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</p></td>
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<td><p>
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Assigns to an <tt class="computeroutput"><span class="identifier">nview</span></tt>,
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<tt class="computeroutput"><span class="identifier">nv1</span></tt>, from another
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<tt class="computeroutput"><span class="identifier">nview</span></tt>, <tt class="computeroutput"><span class="identifier">nv2</span></tt>.
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</p></td>
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</tr>
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</tbody>
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</table></div>
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<p>
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The <tt class="computeroutput"><span class="identifier">nview</span></tt> internally stores
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a Fusion <a href="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a>
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of references to the elements of the original Fusion <a href="../sequence.html" title="Sequence">Sequence</a>
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</p>
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<<<<<<< .working
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<a name="fusion.view.nview.example"></a><h4>
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<a name="id529549"></a>
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<a href="nview.html#fusion.view.nview.example">Example</a>
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</h4>
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<pre class="programlisting"><span class="keyword">typedef</span> <a href="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span>
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=======
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<a name="fusion.view.nview.example"></a><h5>
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<a name="id737073"></a>
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<a class="link" href="nview.html#fusion.view.nview.example">Example</a>
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</h5>
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<pre class="programlisting"><span class="keyword">typedef</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">char</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> <span class="identifier">vec</span><span class="special">;</span>
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>>>>>>> .merge-right.r57125
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<span class="keyword">typedef</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector_c</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">,</span> <span class="number">2</span><span class="special">,</span> <span class="number">0</span><span class="special">></span> <span class="identifier">indicies</span><span class="special">;</span>
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<span class="identifier">vec</span> <span class="identifier">v1</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="char">'c'</span><span class="special">,</span> <span class="number">2.0</span><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">nview</span><span class="special"><</span><span class="identifier">vec</span><span class="special">,</span> <span class="identifier">indicies</span><span class="special">>(</span><span class="identifier">v1</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// (2.0 c 1 2.0 1)
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</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">as_nview</span><span class="special"><</span><span class="number">2</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">1</span><span class="special">,</span> <span class="number">0</span><span class="special">>(</span><span class="identifier">v1</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> <span class="comment">// (2.0 c c 1)
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</span></pre>
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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"><div class="copyright-footer">Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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>)
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</p>
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</div></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="reverse_view.html"><img src="../../../../../../doc/html/images/prev.png" alt="Prev"></a><a accesskey="u" href="../view.html"><img src="../../../../../../doc/html/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/html/images/home.png" alt="Home"></a><a accesskey="n" href="../adapted.html"><img src="../../../../../../doc/html/images/next.png" alt="Next"></a>
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</div>
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</body>
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</html>
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