boost-react-native-bundle

<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> <title>The MPL Reference Manual: advance</title> <link rel="stylesheet" href="../style.css" type="text/css" /> </head> <body class="docframe refmanual"> <table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterator-metafunctions.html" class="navigation-link">Prev</a> <a href="./distance.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./distance.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterator-metafunctions.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> <td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./iterators.html" class="navigation-link">Iterators</a> / <a href="./iterator-metafunctions.html" class="navigation-link">Iterator Metafunctions</a> / <a href="./advance.html" class="navigation-link">advance</a></td> </tr></table><div class="header-separator"></div> <div class="section" id="advance"> <h1><a class="toc-backref" href="./iterator-metafunctions.html#id1454">advance</a></h1> <div class="section" id="id403"> <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> <pre class="literal-block"> template< typename Iterator , typename N > struct <a href="./advance.html" class="identifier">advance</a> { typedef <em>unspecified</em> type; }; </pre> </div> <div class="section" id="id404"> <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> <p>Moves <tt class="literal"><span class="pre">Iterator</span></tt> by the distance <tt class="literal"><span class="pre">N</span></tt>. For <a class="reference internal" href="./bidirectional-iterator.html">bidirectional</a> and <a class="reference internal" href="./random-access-iterator.html">random access</a> iterators, the distance may be negative.</p> </div> <div class="section" id="id405"> <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> <pre class="literal-block"> #include <<a href="../../../../boost/mpl/advance.hpp" class="header">boost/mpl/advance.hpp</a>> </pre> </div> <div class="section" id="id406"> <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> <table border="1" class="docutils table"> <colgroup> <col width="19%" /> <col width="35%" /> <col width="45%" /> </colgroup> <thead valign="bottom"> <tr><th class="head">Parameter</th> <th class="head">Requirement</th> <th class="head">Description</th> </tr> </thead> <tbody valign="top"> <tr><td><tt class="literal"><span class="pre">Iterator</span></tt></td> <td><a class="reference internal" href="./forward-iterator.html">Forward Iterator</a></td> <td>An iterator to advance.</td> </tr> <tr><td><tt class="literal"><span class="pre">N</span></tt></td> <td><a class="reference internal" href="./integral-constant.html">Integral Constant</a></td> <td>A distance.</td> </tr> </tbody> </table> </div> <div class="section" id="id407"> <h3><a class="subsection-title" href="#model-of" name="model-of">Model Of</a></h3> <p><a class="reference internal" href="./tag-dispatched-metafunction.html">Tag Dispatched Metafunction</a></p> </div> <div class="section" id="id408"> <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> <p>For a <a class="reference internal" href="./forward-iterator.html">Forward Iterator</a> <tt class="literal"><span class="pre">iter</span></tt> and arbitrary <a class="reference internal" href="./integral-constant.html">Integral Constant</a> <tt class="literal"><span class="pre">n</span></tt>:</p> <pre class="literal-block"> typedef <a href="./advance.html" class="identifier">advance</a><iter,n>::type j; </pre> <table class="docutils field-list" frame="void" rules="none"> <col class="field-name" /> <col class="field-body" /> <tbody valign="top"> <tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first"><a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>.</p> </td> </tr> <tr class="field"><th class="field-name">Precondition:</th><td class="field-body"><p class="first">If <tt class="literal"><span class="pre">Iterator</span></tt> is a <a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>, <tt class="literal"><span class="pre">n::value</span></tt> must be nonnegative.</p> </td> </tr> <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to:</p> <pre class="literal-block"> typedef iter i0; typedef <a href="./next.html" class="identifier">next</a><i0>::type i1; <em>...</em> typedef <a href="./next.html" class="identifier">next</a><i<em>n-1</em>>::type j; </pre> <p>if <tt class="literal"><span class="pre">n::value</span> <span class="pre">></span> <span class="pre">0</span></tt>, and</p> <pre class="literal-block"> typedef iter i0; typedef <a href="./prior.html" class="identifier">prior</a><i0>::type i1; <em>...</em> typedef <a href="./prior.html" class="identifier">prior</a><i<em>n-1</em>>::type j; </pre> <p>otherwise.</p> </td> </tr> <tr class="field"><th class="field-name">Postcondition:</th><td class="field-body"><p class="first last"><tt class="literal"><span class="pre">j</span></tt> is dereferenceable or past-the-end; <tt class="literal"><span class="pre"><a href="./distance.html" class="identifier">distance</a><iter,j>::value</span> <span class="pre">==</span> <span class="pre">n::value</span></tt> if <tt class="literal"><span class="pre">n::value</span> <span class="pre">></span> <span class="pre">0</span></tt>, and <tt class="literal"><span class="pre"><a href="./distance.html" class="identifier">distance</a><j,iter>::value</span> <span class="pre">==</span> <span class="pre">n::value</span></tt> otherwise.</p> </td> </tr> </tbody> </table> </div> <div class="section" id="id409"> <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> <p>Amortized constant time if <tt class="literal"><span class="pre">iter</span></tt> is a model of <a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a>, otherwise linear time.</p> </div> <div class="section" id="id410"> <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> <pre class="literal-block"> typedef <a href="./range-c.html" class="identifier">range_c</a><int,0,10> numbers; typedef <a href="./begin.html" class="identifier">begin</a><numbers>::type first; typedef <a href="./end.html" class="identifier">end</a><numbers>::type last; typedef <a href="./advance.html" class="identifier">advance</a><first,<a href="./int.html" class="identifier">int_</a><10> >::type i1; typedef <a href="./advance.html" class="identifier">advance</a><last,<a href="./int.html" class="identifier">int_</a><-10> >::type i2; <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( boost::is_same<i1,last> )); <a href="./assert.html" class="identifier">BOOST_MPL_ASSERT</a>(( boost::is_same<i2,first> )); </pre> </div> <div class="section" id="id411"> <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> <p><a class="reference internal" href="./iterators.html">Iterators</a>, <a class="reference internal" href="./tag-dispatched-metafunction.html">Tag Dispatched Metafunction</a>, <a class="reference internal" href="./distance.html">distance</a>, <a class="reference internal" href="./next.html">next</a></p>  </div> </div> <div class="footer-separator"></div> <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterator-metafunctions.html" class="navigation-link">Prev</a> <a href="./distance.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./distance.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterator-metafunctions.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td> <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body> </html>