155 lines
9.0 KiB
HTML
155 lines
9.0 KiB
HTML
<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" />
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<title>The MPL Reference Manual: inherit_linearly</title>
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<link rel="stylesheet" href="../style.css" type="text/css" />
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</head>
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<body class="docframe refmanual">
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<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Prev</a> <a href="./numeric-cast.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Back</a> <a href="./numeric-cast.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./miscellaneous.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>
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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./metafunctions.html" class="navigation-link">Metafunctions</a> / <a href="./miscellaneous.html" class="navigation-link">Miscellaneous</a> / <a href="./inherit-linearly.html" class="navigation-link">inherit_linearly</a></td>
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</tr></table><div class="header-separator"></div>
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<div class="section" id="inherit-linearly">
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<h1><a class="toc-backref" href="./miscellaneous.html#id1567">inherit_linearly</a></h1>
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<div class="section" id="id1172">
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<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
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<pre class="literal-block">
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template<
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typename Types
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, typename Node
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, typename Root = <a href="./empty-base.html" class="identifier">empty_base</a>
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>
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struct <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a>
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: <a href="./fold.html" class="identifier">fold</a><Types,Root,Node>
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{
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};
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</pre>
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</div>
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<div class="section" id="id1173">
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
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<p>A convenience wrapper for <tt class="literal"><span class="pre"><a href="./fold.html" class="identifier">fold</a></span></tt> to use in the context of sequence-driven
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class composition. Returns the result the successive application of binary
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<tt class="literal"><span class="pre">Node</span></tt> to the result of the previous <tt class="literal"><span class="pre">Node</span></tt> invocation (<tt class="literal"><span class="pre">Root</span></tt> if it's
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the first call) and every type in the <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">Types</span></tt> in order.</p>
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</div>
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<div class="section" id="id1174">
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<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
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<pre class="literal-block">
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#include <<a href="../../../../boost/mpl/inherit_linearly.hpp" class="header">boost/mpl/inherit_linearly.hpp</a>>
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</pre>
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</div>
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<div class="section" id="id1175">
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<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
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<p><a class="reference internal" href="./metafunction.html">Metafunction</a></p>
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</div>
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<div class="section" id="id1176">
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<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
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<table border="1" class="docutils table">
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<colgroup>
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<col width="15%" />
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<col width="32%" />
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<col width="53%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th class="head">Parameter</th>
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<th class="head">Requirement</th>
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<th class="head">Description</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="literal"><span class="pre">Types</span></tt></td>
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<td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td>
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<td>Types to inherit from.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre">Node</span></tt></td>
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<td>Binary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td>
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<td>A derivation metafunction.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre">Root</span></tt></td>
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<td>A class type</td>
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<td>A type to be placed at the root of the class
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hierarchy.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id1177">
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<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
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<p>For any <a class="reference internal" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">types</span></tt>, binary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a> <tt class="literal"><span class="pre">node</span></tt>, and arbitrary
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class type <tt class="literal"><span class="pre">root</span></tt>:</p>
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<pre class="literal-block">
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typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a><types,node,root>::type r;
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</pre>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field"><th class="field-name">Return type:</th><td class="field-body"><p class="first">A class type.</p>
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</td>
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</tr>
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<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
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<pre class="last literal-block">
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typedef <a href="./fold.html" class="identifier">fold</a><types,root,node>::type r;
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</pre>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="id1178">
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<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
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<p>Linear. Exactly <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a><types>::value</span></tt> applications of <tt class="literal"><span class="pre">node</span></tt>.</p>
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</div>
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<div class="section" id="id1179">
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<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
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<pre class="literal-block">
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template< typename T > struct tuple_field
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{
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T field;
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};
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template< typename T >
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inline
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T& field(tuple_field<T>& t)
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{
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return t.field;
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}
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typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a><
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<a href="./vector.html" class="identifier">vector</a><int,char const*,bool>
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, <a href="./inherit.html" class="identifier">inherit</a>< <a href="./placeholders.html" class="identifier">_1</a>, tuple_field<<a href="./placeholders.html" class="identifier">_2</a>> >
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>::type tuple;
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int main()
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{
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tuple t;
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field<int>(t) = -1;
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field<char const*>(t) = "text";
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field<bool>(t) = false;
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std::cout
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<< field<int>(t) << 'n'
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<< field<char const*>(t) << 'n'
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<< field<bool>(t) << 'n'
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;
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}
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</pre>
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</div>
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<div class="section" id="id1180">
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
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<p><a class="reference internal" href="./metafunctions.html">Metafunctions</a>, <a class="reference internal" href="./algorithms.html">Algorithms</a>, <a class="reference internal" href="./inherit.html">inherit</a>, <a class="reference internal" href="./empty-base.html">empty_base</a>, <a class="reference internal" href="./fold.html">fold</a>, <a class="reference internal" href="./reverse-fold.html">reverse_fold</a></p>
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<!-- Metafunctions/Miscellaneous//numeric_cast |50 -->
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</div>
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</div>
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<div class="footer-separator"></div>
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<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Prev</a> <a href="./numeric-cast.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Back</a> <a href="./numeric-cast.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./miscellaneous.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>
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<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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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 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>
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</html>
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