Planet
navi homePPSaboutscreenshotsdownloaddevelopmentforum

source: downloads/boost_1_34_1/libs/mpl/doc/refmanual/inherit-linearly.html @ 29

Last change on this file since 29 was 29, checked in by landauf, 17 years ago

updated boost from 1_33_1 to 1_34_1
File size: 9.1 KB
Line 
1<?xml version="1.0" encoding="utf-8" ?>
2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
4<!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost -->
5<!-- Software License, Version 1.0. (See accompanying -->
6<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
7<head>
8<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
9<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
10<title>The MPL Reference Manual: inherit_linearly</title>
11<link rel="stylesheet" href="../style.css" type="text/css" />
12</head>
13<body class="docframe refmanual">
14<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>&nbsp;<a href="./numeric-cast.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Back</a>&nbsp;<a href="./numeric-cast.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./miscellaneous.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
15<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>
16</tr></table><div class="header-separator"></div>
17<div class="section" id="inherit-linearly">
18<h1><a class="toc-backref" href="./miscellaneous.html#id491" name="inherit-linearly">inherit_linearly</a></h1>
19<div class="section" id="miscellaneous-inherit-synopsis">
20<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
21<pre class="literal-block">
22template&lt;
23      typename Types
24    , typename Node
25    , typename Root = <a href="./empty-base.html" class="identifier">empty_base</a>
26    &gt;
27struct <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a>
28    : <a href="./fold.html" class="identifier">fold</a>&lt;Types,Root,Node&gt;
29{
30};
31</pre>
32</div>
33<div class="section" id="miscellaneous-inherit-description">
34<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
35<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
36class composition. Returns the result the successive application of binary
37<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
38the first call) and every type in the <a class="reference" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">Types</span></tt> in order.</p>
39</div>
40<div class="section" id="miscellaneous-inherit-header">
41<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
42<pre class="literal-block">
43#include &lt;<a href="../../../../boost/mpl/inherit_linearly.hpp" class="header">boost/mpl/inherit_linearly.hpp</a>&gt;
44</pre>
45</div>
46<div class="section" id="miscellaneous-inherit-model-of">
47<h3><a class="subsection-title" href="#model-of" name="model-of">Model of</a></h3>
48<p><a class="reference" href="./metafunction.html">Metafunction</a></p>
49</div>
50<div class="section" id="miscellaneous-inherit-parameters">
51<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
52<table border="1" class="table">
53<colgroup>
54<col width="15%" />
55<col width="32%" />
56<col width="53%" />
57</colgroup>
58<thead valign="bottom">
59<tr><th>Parameter</th>
60<th>Requirement</th>
61<th>Description</th>
62</tr>
63</thead>
64<tbody valign="top">
65<tr><td><tt class="literal"><span class="pre">Types</span></tt></td>
66<td><a class="reference" href="./forward-sequence.html">Forward Sequence</a></td>
67<td>Types to inherit from.</td>
68</tr>
69<tr><td><tt class="literal"><span class="pre">Node</span></tt></td>
70<td>Binary <a class="reference" href="./lambda-expression.html">Lambda Expression</a></td>
71<td>A derivation metafunction.</td>
72</tr>
73<tr><td><tt class="literal"><span class="pre">Root</span></tt></td>
74<td>A class type</td>
75<td>A type to be placed at the root of the class
76hierarchy.</td>
77</tr>
78</tbody>
79</table>
80</div>
81<div class="section" id="miscellaneous-inherit-expression-semantics">
82<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
83<p>For any <a class="reference" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">types</span></tt>, binary <a class="reference" href="./lambda-expression.html">Lambda Expression</a> <tt class="literal"><span class="pre">node</span></tt>, and arbitrary
84class type <tt class="literal"><span class="pre">root</span></tt>:</p>
85<pre class="literal-block">
86typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a>&lt;types,node,root&gt;::type r;
87</pre>
88<table class="field-list" frame="void" rules="none">
89<col class="field-name" />
90<col class="field-body" />
91<tbody valign="top">
92<tr class="field"><th class="field-name">Return type:</th><td class="field-body">A class type.</td>
93</tr>
94<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><p class="first">Equivalent to</p>
95<pre class="last literal-block">
96typedef <a href="./fold.html" class="identifier">fold</a>&lt;types,root,node&gt;::type r;
97</pre>
98</td>
99</tr>
100</tbody>
101</table>
102</div>
103<div class="section" id="miscellaneous-inherit-complexity">
104<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3>
105<p>Linear. Exactly <tt class="literal"><span class="pre"><a href="./size.html" class="identifier">size</a>&lt;types&gt;::value</span></tt> applications of <tt class="literal"><span class="pre">node</span></tt>.</p>
106</div>
107<div class="section" id="miscellaneous-inherit-example">
108<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
109<pre class="literal-block">
110template&lt; typename T &gt; struct tuple_field
111{
112    T field;
113};
114
115template&lt; typename T &gt;
116inline
117T&amp; field(tuple_field&lt;T&gt;&amp; t)
118{
119    return t.field;
120}
121
122typedef <a href="./inherit-linearly.html" class="identifier">inherit_linearly</a>&lt;
123      <a href="./vector.html" class="identifier">vector</a>&lt;int,char const*,bool&gt;
124    , <a href="./inherit.html" class="identifier">inherit</a>&lt; _1, tuple_field&lt;_2&gt; &gt;
125    &gt;::type tuple;
126
127
128int main()
129{
130    tuple t;
131   
132    field&lt;int&gt;(t) = -1;
133    field&lt;char const*&gt;(t) = &quot;text&quot;;
134    field&lt;bool&gt;(t) = false;
135
136    std::cout
137        &lt;&lt; field&lt;int&gt;(t) &lt;&lt; 'n'
138        &lt;&lt; field&lt;char const*&gt;(t) &lt;&lt; 'n'
139        &lt;&lt; field&lt;bool&gt;(t) &lt;&lt; 'n'
140        ;
141}
142</pre>
143</div>
144<div class="section" id="miscellaneous-inherit-see-also">
145<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
146<p><a class="reference" href="./metafunctions.html">Metafunctions</a>, <a class="reference" href="./algorithms.html">Algorithms</a>, <a class="refentry reference" href="./inherit.html"><tt class="refentry literal"><span class="pre">inherit</span></tt></a>, <a class="refentry reference" href="./empty-base.html"><tt class="refentry literal"><span class="pre">empty_base</span></tt></a>, <a class="refentry reference" href="./fold.html"><tt class="refentry literal"><span class="pre">fold</span></tt></a>, <a class="refentry reference" href="./reverse-fold.html"><tt class="refentry literal"><span class="pre">reverse_fold</span></tt></a></p>
147<!-- modtime: November 10, 2004 04:40:14 +0000 -->
148<!-- Metafunctions/Miscellaneous//numeric_cast |50 -->
149</div>
150</div>
151
152<div class="footer-separator"></div>
153<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>&nbsp;<a href="./numeric-cast.html" class="navigation-link">Next</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./inherit.html" class="navigation-link">Back</a>&nbsp;<a href="./numeric-cast.html" class="navigation-link">Along</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./miscellaneous.html" class="navigation-link">Up</a>&nbsp;<a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator">&nbsp;|&nbsp;</span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
154</tr></table></body>
155</html>
Note: See TracBrowser for help on using the repository browser.