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| <title>The MPL Reference Manual: inherit_linearly</title> |
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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> |
| <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> |
| </tr></table><div class="header-separator"></div> |
| <div class="section" id="inherit-linearly"> |
| <h1><a class="toc-backref" href="./miscellaneous.html#id1567">inherit_linearly</a></h1> |
| <div class="section" id="id1172"> |
| <h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> |
| <pre class="literal-block"> |
| template< |
| typename Types |
| , typename Node |
| , typename Root = <a href="./empty-base.html" class="identifier">empty_base</a> |
| > |
| struct <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a> |
| : <a href="./fold.html" class="identifier">fold</a><Types,Root,Node> |
| { |
| }; |
| </pre> |
| </div> |
| <div class="section" id="id1173"> |
| <h3><a class="subsection-title" href="#description" name="description">Description</a></h3> |
| <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 |
| class composition. Returns the result the successive application of binary |
| <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 |
| 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> |
| </div> |
| <div class="section" id="id1174"> |
| <h3><a class="subsection-title" href="#header" name="header">Header</a></h3> |
| <pre class="literal-block"> |
| #include <<a href="../../../../boost/mpl/inherit_linearly.hpp" class="header">boost/mpl/inherit_linearly.hpp</a>> |
| </pre> |
| </div> |
| <div class="section" id="id1175"> |
| <h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3> |
| <p><a class="reference internal" href="./metafunction.html">Metafunction</a></p> |
| </div> |
| <div class="section" id="id1176"> |
| <h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> |
| <table border="1" class="docutils table"> |
| <colgroup> |
| <col width="15%" /> |
| <col width="32%" /> |
| <col width="53%" /> |
| </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">Types</span></tt></td> |
| <td><a class="reference internal" href="./forward-sequence.html">Forward Sequence</a></td> |
| <td>Types to inherit from.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre">Node</span></tt></td> |
| <td>Binary <a class="reference internal" href="./lambda-expression.html">Lambda Expression</a></td> |
| <td>A derivation metafunction.</td> |
| </tr> |
| <tr><td><tt class="literal"><span class="pre">Root</span></tt></td> |
| <td>A class type</td> |
| <td>A type to be placed at the root of the class |
| hierarchy.</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id1177"> |
| <h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> |
| <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 |
| class type <tt class="literal"><span class="pre">root</span></tt>:</p> |
| <pre class="literal-block"> |
| typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a><types,node,root>::type r; |
| </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 type.</p> |
| </td> |
| </tr> |
| <tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p> |
| <pre class="last literal-block"> |
| typedef <a href="./fold.html" class="identifier">fold</a><types,root,node>::type r; |
| </pre> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="section" id="id1178"> |
| <h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> |
| <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> |
| </div> |
| <div class="section" id="id1179"> |
| <h3><a class="subsection-title" href="#example" name="example">Example</a></h3> |
| <pre class="literal-block"> |
| template< typename T > struct tuple_field |
| { |
| T field; |
| }; |
| |
| template< typename T > |
| inline |
| T& field(tuple_field<T>& t) |
| { |
| return t.field; |
| } |
| |
| typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a>< |
| <a href="./vector.html" class="identifier">vector</a><int,char const*,bool> |
| , <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>> > |
| >::type tuple; |
| |
| |
| int main() |
| { |
| tuple t; |
| |
| field<int>(t) = -1; |
| field<char const*>(t) = "text"; |
| field<bool>(t) = false; |
| |
| std::cout |
| << field<int>(t) << 'n' |
| << field<char const*>(t) << 'n' |
| << field<bool>(t) << 'n' |
| ; |
| } |
| </pre> |
| </div> |
| <div class="section" id="id1180"> |
| <h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> |
| <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> |
| <!-- Metafunctions/Miscellaneous//numeric_cast |50 --> |
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| <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> |
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