forked from boostorg/mpl
114 lines
7.3 KiB
HTML
114 lines
7.3 KiB
HTML
<?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">
|
|
<!-- Copyright Aleksey Gurtovoy 2006. Distributed under the Boost -->
|
|
<!-- Software License, Version 1.0. (See accompanying -->
|
|
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
|
<title>The MPL Reference Manual: count</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="./contains.html" class="navigation-link">Prev</a> <a href="./count-if.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./contains.html" class="navigation-link">Back</a> <a href="./count-if.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./querying-algorithms.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="./algorithms.html" class="navigation-link">Algorithms</a> / <a href="./querying-algorithms.html" class="navigation-link">Querying Algorithms</a> / <a href="./count.html" class="navigation-link">count</a></td>
|
|
</tr></table><div class="header-separator"></div>
|
|
<div class="section" id="count">
|
|
<h1><a class="toc-backref" href="./querying-algorithms.html#id406" name="count">count</a></h1>
|
|
<div class="section" id="count-synopsis">
|
|
<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3>
|
|
<pre class="literal-block">
|
|
template<
|
|
typename Sequence
|
|
, typename T
|
|
>
|
|
struct <a href="./count.html" class="identifier">count</a>
|
|
{
|
|
typedef <em>unspecified</em> type;
|
|
};
|
|
</pre>
|
|
</div>
|
|
<div class="section" id="count-description">
|
|
<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
|
|
<p>Returns the number of elements in a <tt class="literal"><span class="pre">Sequence</span></tt> that are identical to <tt class="literal"><span class="pre">T</span></tt>.</p>
|
|
</div>
|
|
<div class="section" id="count-header">
|
|
<h3><a class="subsection-title" href="#header" name="header">Header</a></h3>
|
|
<pre class="literal-block">
|
|
#include <<a href="../../../../boost/mpl/count.hpp" class="header">boost/mpl/count.hpp</a>>
|
|
</pre>
|
|
</div>
|
|
<div class="section" id="count-parameters">
|
|
<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3>
|
|
<table border="1" class="table">
|
|
<colgroup>
|
|
<col width="19%" />
|
|
<col width="35%" />
|
|
<col width="45%" />
|
|
</colgroup>
|
|
<thead valign="bottom">
|
|
<tr><th>Parameter</th>
|
|
<th>Requirement</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody valign="top">
|
|
<tr><td><tt class="literal"><span class="pre">Sequence</span></tt></td>
|
|
<td><a class="reference" href="./forward-sequence.html">Forward Sequence</a></td>
|
|
<td>A sequence to be examined.</td>
|
|
</tr>
|
|
<tr><td><tt class="literal"><span class="pre">T</span></tt></td>
|
|
<td>Any type</td>
|
|
<td>A type to search for.</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<div class="section" id="count-expression-semantics">
|
|
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
|
|
<p>For any <a class="reference" href="./forward-sequence.html">Forward Sequence</a> <tt class="literal"><span class="pre">s</span></tt> and arbitrary type <tt class="literal"><span class="pre">t</span></tt>:</p>
|
|
<pre class="literal-block">
|
|
typedef <a href="./count.html" class="identifier">count</a><s,t>::type n;
|
|
</pre>
|
|
<table class="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"><a class="reference" href="./integral-constant.html">Integral Constant</a>.</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="./count-if.html" class="identifier">count_if</a>< s,is_same<_,T> >::type n;
|
|
</pre>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
<div class="section" id="count-complexity">
|
|
<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><s>::value</span></tt> comparisons for identity.</p>
|
|
</div>
|
|
<div class="section" id="count-example">
|
|
<h3><a class="subsection-title" href="#example" name="example">Example</a></h3>
|
|
<pre class="literal-block">
|
|
typedef <a href="./vector.html" class="identifier">vector</a><int,char,long,short,char,short,double,long> types;
|
|
typedef <a href="./count.html" class="identifier">count</a><types, short>::type n;
|
|
|
|
<a href="./assert-relation.html" class="identifier">BOOST_MPL_ASSERT_RELATION</a>( n::value, ==, 2 );
|
|
</pre>
|
|
</div>
|
|
<div class="section" id="count-see-also">
|
|
<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
|
|
<p><a class="reference" href="./querying-algorithms.html">Querying Algorithms</a>, <a class="refentry reference" href="./count-if.html"><tt class="refentry literal"><span class="pre">count_if</span></tt></a>, <a class="refentry reference" href="./find.html"><tt class="refentry literal"><span class="pre">find</span></tt></a>, <a class="refentry reference" href="./find-if.html"><tt class="refentry literal"><span class="pre">find_if</span></tt></a>, <a class="refentry reference" href="./contains.html"><tt class="refentry literal"><span class="pre">contains</span></tt></a>, <a class="refentry reference" href="./lower-bound.html"><tt class="refentry literal"><span class="pre">lower_bound</span></tt></a></p>
|
|
<!-- modtime: November 13, 2004 01:52:16 +0000 -->
|
|
<!-- Algorithms/Querying Algorithms//count_if |50 -->
|
|
</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="./contains.html" class="navigation-link">Prev</a> <a href="./count-if.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./contains.html" class="navigation-link">Back</a> <a href="./count-if.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./querying-algorithms.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>
|
|
</tr></table></body>
|
|
</html>
|