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<head> 5<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 6<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> 7<title>The MPL Reference Manual: sequence_tag</title> 8<link rel="stylesheet" href="../style.css" type="text/css" /> 9</head> 10<body class="docframe refmanual"> 11<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./push-front.html" class="navigation-link">Prev</a> <a href="./size.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./push-front.html" class="navigation-link">Back</a> <a href="./size.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./intrinsic-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> 12<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./intrinsic-metafunctions.html" class="navigation-link">Intrinsic Metafunctions</a> / <a href="./sequence-tag.html" class="navigation-link">sequence_tag</a></td> 13</tr></table><div class="header-separator"></div> 14<div class="section" id="sequence-tag"> 15<h1><a class="toc-backref" href="./intrinsic-metafunctions.html#id1445">sequence_tag</a></h1> 16<div class="section" id="id354"> 17<h3><a class="subsection-title" href="#synopsis" name="synopsis">Synopsis</a></h3> 18<pre class="literal-block"> 19template< 20 typename X 21 > 22struct <a href="./sequence-tag.html" class="identifier">sequence_tag</a> 23{ 24 typedef <em>unspecified</em> type; 25}; 26</pre> 27</div> 28<div class="section" id="id355"> 29<h3><a class="subsection-title" href="#description" name="description">Description</a></h3> 30<p><tt class="literal"><span class="pre"><a href="./sequence-tag.html" class="identifier">sequence_tag</a></span></tt> is a <a class="reference internal" href="./tag-dispatched-metafunction.html#tag-metafunction">tag metafunctions</a> for all <a class="reference internal" href="./tag-dispatched-metafunction.html">tag dispatched</a> 31<a class="reference internal" href="./intrinsic-metafunctions.html">intrinsic sequence operations</a>.</p> 32</div> 33<div class="section" id="id357"> 34<h3><a class="subsection-title" href="#header" name="header">Header</a></h3> 35<pre class="literal-block"> 36#include <<a href="../../../../boost/mpl/sequence_tag.hpp" class="header">boost/mpl/sequence_tag.hpp</a>> 37</pre> 38</div> 39<div class="section" id="id358"> 40<h3><a class="subsection-title" href="#parameters" name="parameters">Parameters</a></h3> 41<table border="1" class="docutils table"> 42<colgroup> 43<col width="19%" /> 44<col width="23%" /> 45<col width="58%" /> 46</colgroup> 47<thead valign="bottom"> 48<tr><th class="head">Parameter</th> 49<th class="head">Requirement</th> 50<th class="head">Description</th> 51</tr> 52</thead> 53<tbody valign="top"> 54<tr><td><tt class="literal"><span class="pre">X</span></tt></td> 55<td>Any type</td> 56<td>A type to obtain a sequence tag for.</td> 57</tr> 58</tbody> 59</table> 60</div> 61<div class="section" id="id359"> 62<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> 63<p>For any arbitrary type <tt class="literal"><span class="pre">x</span></tt>:</p> 64<pre class="literal-block"> 65typedef <a href="./sequence-tag.html" class="identifier">sequence_tag</a><x>::type tag; 66</pre> 67<table class="docutils field-list" frame="void" rules="none"> 68<col class="field-name" /> 69<col class="field-body" /> 70<tbody valign="top"> 71<tr class="field"><th class="field-name">Return type:</th><td class="field-body">A type.</td> 72</tr> 73<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><tt class="literal"><span class="pre">tag</span></tt> is an unspecified tag type for <tt class="literal"><span class="pre">x</span></tt>.</td> 74</tr> 75</tbody> 76</table> 77</div> 78<div class="section" id="id360"> 79<h3><a class="subsection-title" href="#complexity" name="complexity">Complexity</a></h3> 80<p>Amortized constant time.</p> 81</div> 82<div class="section" id="id361"> 83<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> 84<p><a class="reference internal" href="./intrinsic-metafunctions.html">Intrinsic Metafunctions</a>, <a class="reference internal" href="./tag-dispatched-metafunction.html">Tag Dispatched Metafunction</a></p> 85<!-- Sequences/Intrinsic Metafunctions//size --> 86</div> 87</div> 88 89<div class="footer-separator"></div> 90<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./push-front.html" class="navigation-link">Prev</a> <a href="./size.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./push-front.html" class="navigation-link">Back</a> <a href="./size.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./intrinsic-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> 91<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> 92Distributed under the Boost Software License, Version 1.0. (See accompanying 93file 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> 94</html> 95