<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <title>repetitive_view</title> <link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2"> <link rel="home" href="../../index.html" title="Chapter 1. Fusion 2.0"> <link rel="up" href="../view.html" title="View"> <link rel="prev" href="nview.html" title="nview"> <link rel="next" href="../adapted.html" title="Adapted"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table cellpadding="2" width="100%"><tr> <td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> <td align="center"><a href="../../../../../../index.html">Home</a></td> <td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> <td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> <td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> <td align="center"><a href="../../../../../../more/index.htm">More</a></td> </tr></table> <hr> <div class="spirit-nav"> <a accesskey="p" href="nview.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../view.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../adapted.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> </div> <div class="section"> <div class="titlepage"><div><div><h3 class="title"> <a name="fusion.view.repetitive_view"></a><a class="link" href="repetitive_view.html" title="repetitive_view">repetitive_view</a> </h3></div></div></div> <a name="fusion.view.repetitive_view.description"></a><h5> <a name="id1001339"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.description">Description</a> </h5> <p> <code class="computeroutput"><span class="identifier">repetitive_view</span></code> presents a view which iterates over a given <a class="link" href="../sequence.html" title="Sequence">Sequence</a> repeatedly. Because a <code class="computeroutput"><span class="identifier">repetitive_view</span></code> has infinite length, it can only be used when some external condition determines the end. Thus, initializing a fixed length sequence with a <code class="computeroutput"><span class="identifier">repetitive_view</span></code> is okay, but printing a <code class="computeroutput"><span class="identifier">repetitive_view</span></code> to <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span></code> is not. </p> <a name="fusion.view.repetitive_view.header"></a><h5> <a name="id1001404"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.header">Header</a> </h5> <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">repetitive_view</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> <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">repetitive_view</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> </pre> <a name="fusion.view.repetitive_view.synopsis"></a><h5> <a name="id1001512"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.synopsis">Synopsis</a> </h5> <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">struct</span> <span class="identifier">repetitive_view</span><span class="special">;</span> </pre> <a name="fusion.view.repetitive_view.template_parameters"></a><h5> <a name="id1001564"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.template_parameters">Template parameters</a> </h5> <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">Sequence</span></code> </p> </td> <td> <p> An arbitrary Fusion <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward Sequence</a> </p> </td> <td> </td> </tr></tbody> </table></div> <div class="variablelist"> <p class="title"><b>Notation</b></p> <dl> <dt><span class="term"><code class="computeroutput"><span class="identifier">RV</span></code></span></dt> <dd><p> A <code class="computeroutput"><span class="identifier">repetitive_view</span></code> type </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt> <dd><p> An instance of <code class="computeroutput"><span class="identifier">Sequences</span></code> </p></dd> <dt><span class="term"><code class="computeroutput"><span class="identifier">rv</span></code>, <code class="computeroutput"><span class="identifier">rv1</span></code>, <code class="computeroutput"><span class="identifier">rv2</span></code></span></dt> <dd><p> Instances of <code class="computeroutput"><span class="identifier">RV</span></code> </p></dd> </dl> </div> <a name="fusion.view.repetitive_view.expression_semantics"></a><h5> <a name="id1001753"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.expression_semantics">Expression Semantics</a> </h5> <div class="informaltable"><table class="table"> <colgroup> <col> <col> <col> </colgroup> <thead><tr> <th> <p> Expression </p> </th> <th> <p> Return Type </p> </th> <th> <p> Semantics </p> </th> </tr></thead> <tbody> <tr> <td> <p> <code class="computeroutput"><span class="identifier">RV</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></code> </p> </td> <td> </td> <td> <p> Creates an <code class="computeroutput"><span class="identifier">repetitive_view</span></code> given the underlying sequence. </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">RV</span><span class="special">(</span><span class="identifier">rv1</span><span class="special">)</span></code> </p> </td> <td> </td> <td> <p> Copy constructs an <code class="computeroutput"><span class="identifier">repetitive_view</span></code> from another <code class="computeroutput"><span class="identifier">repetitive_view</span></code>, <code class="computeroutput"><span class="identifier">rv1</span></code>. </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><span class="identifier">rv1</span> <span class="special">=</span> <span class="identifier">rv2</span></code> </p> </td> <td> </td> <td> <p> Assigns to a <code class="computeroutput"><span class="identifier">repetitive_view</span></code>, <code class="computeroutput"><span class="identifier">rv1</span></code>, from another <code class="computeroutput"><span class="identifier">repetitive_view</span></code>, <code class="computeroutput"><span class="identifier">rv2</span></code>. </p> </td> </tr> <tr> <td> <p> <code class="computeroutput"><a class="link" href="../sequence/intrinsic/functions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">begin</span></code></a><span class="special">(</span><span class="identifier">rv</span><span class="special">)</span></code> </p> </td> <td> <p> <a class="link" href="../iterator/concepts/forward_iterator.html" title="Forward Iterator">Forward Iterator</a> </p> </td> <td> </td> </tr> <tr> <td> <p> <code class="computeroutput"><a class="link" href="../sequence/intrinsic/functions/end.html" title="end"><code class="computeroutput"><span class="identifier">end</span></code></a><span class="special">(</span><span class="identifier">rv</span><span class="special">)</span></code> </p> </td> <td> <p> <a class="link" href="../iterator/concepts/forward_iterator.html" title="Forward Iterator">Forward Iterator</a> </p> </td> <td> <p> Creates an unreachable iterator (since the sequnce is infinite) </p> </td> </tr> </tbody> </table></div> <a name="fusion.view.repetitive_view.result_type_expressions"></a><h5> <a name="id1002632"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.result_type_expressions">Result Type Expressions</a> </h5> <div class="informaltable"><table class="table"> <colgroup><col></colgroup> <thead><tr><th> <p> Expression </p> </th></tr></thead> <tbody> <tr><td> <p> <code class="computeroutput"><a class="link" href="../sequence/intrinsic/metafunctions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></code></a><span class="special"><</span><span class="identifier">RV</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td></tr> <tr><td> <p> <code class="computeroutput"><a class="link" href="../sequence/intrinsic/metafunctions/end.html" title="end"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></code></a><span class="special"><</span><span class="identifier">RV</span><span class="special">>::</span><span class="identifier">type</span></code> </p> </td></tr> </tbody> </table></div> <a name="fusion.view.repetitive_view.example"></a><h5> <a name="id1002762"></a> <a class="link" href="repetitive_view.html#fusion.view.repetitive_view.example">Example</a> </h5> <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">vec1</span><span class="special">;</span> <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="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">></span> <span class="identifier">vec2</span><span class="special">;</span> <span class="identifier">vec1</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> <span class="identifier">vec2</span> <span class="identifier">v2</span><span class="special">(</span><span class="identifier">repetitive_view</span><span class="special"><</span><span class="identifier">vec1</span><span class="special">>(</span><span class="identifier">v1</span><span class="special">));</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">v2</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">// 1, 'c', 2.0, 1, 'c' </span></pre> </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> <hr> <div class="spirit-nav"> <a accesskey="p" href="nview.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../view.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../adapted.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> </div> </body> </html>