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: Extensible Associative Sequence</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="./associative-sequence.html" class="navigation-link">Prev</a> <a href="./integral-sequence-wrapper.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./associative-sequence.html" class="navigation-link">Back</a> <a href="./integral-sequence-wrapper.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./concepts.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="./concepts.html" class="navigation-link">Concepts</a> / <a href="./extensible-associative-sequence.html" class="navigation-link">Extensible Associative Sequence</a></td> 13</tr></table><div class="header-separator"></div> 14<div class="section" id="extensible-associative-sequence"> 15<h1><a class="toc-backref" href="./concepts.html#id1402">Extensible Associative Sequence</a></h1> 16<div class="section" id="id35"> 17<h3><a class="subsection-title" href="#description" name="description">Description</a></h3> 18<p>An <a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a> is an <a class="reference internal" href="./associative-sequence.html">Associative Sequence</a> that supports 19insertion and removal of elements. In contrast to <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, 20<a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a> does not provide a mechanism for 21inserting an element at a specific position.</p> 22</div> 23<div class="section" id="id36"> 24<h3><a class="subsection-title" href="#expression-requirements" name="expression-requirements">Expression requirements</a></h3> 25<p>In the following table and subsequent specifications, <tt class="literal"><span class="pre">s</span></tt> is an <a class="reference internal" href="./associative-sequence.html">Associative Sequence</a>, 26<tt class="literal"><span class="pre">pos</span></tt> is an iterator into <tt class="literal"><span class="pre">s</span></tt>, and <tt class="literal"><span class="pre">x</span></tt> and <tt class="literal"><span class="pre">k</span></tt> are arbitrary types.</p> 27<p>In addition to the <a class="reference internal" href="./associative-sequence.html">Associative Sequence</a> requirements, the following must be met:</p> 28<table border="1" class="docutils table"> 29<colgroup> 30<col width="32%" /> 31<col width="40%" /> 32<col width="28%" /> 33</colgroup> 34<thead valign="bottom"> 35<tr><th class="head">Expression</th> 36<th class="head">Type</th> 37<th class="head">Complexity</th> 38</tr> 39</thead> 40<tbody valign="top"> 41<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,x>::type</span></tt></td> 42<td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td> 43<td>Amortized constant time</td> 44</tr> 45<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,pos,x>::type</span></tt></td> 46<td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td> 47<td>Amortized constant time</td> 48</tr> 49<tr><td><tt class="literal"><span class="pre"><a href="./erase-key.html" class="identifier">erase_key</a><s,k>::type</span></tt></td> 50<td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td> 51<td>Amortized constant time</td> 52</tr> 53<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><s,pos>::type</span></tt></td> 54<td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td> 55<td>Amortized constant time</td> 56</tr> 57<tr><td><tt class="literal"><span class="pre"><a href="./clear.html" class="identifier">clear</a><s>::type</span></tt></td> 58<td><a class="reference internal" href="./extensible-associative-sequence.html">Extensible Associative Sequence</a></td> 59<td>Amortized constant time</td> 60</tr> 61</tbody> 62</table> 63</div> 64<div class="section" id="id37"> 65<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3> 66<p>The semantics of an expression are defined only 67where they differ from, or are not defined in <a class="reference internal" href="./associative-sequence.html">Associative Sequence</a>.</p> 68<table border="1" class="docutils table"> 69<colgroup> 70<col width="32%" /> 71<col width="68%" /> 72</colgroup> 73<thead valign="bottom"> 74<tr><th class="head">Expression</th> 75<th class="head">Semantics</th> 76</tr> 77</thead> 78<tbody valign="top"> 79<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,x>::type</span></tt></td> 80<td><p class="first">Inserts <tt class="literal"><span class="pre">x</span></tt> into <tt class="literal"><span class="pre">s</span></tt>; the resulting sequence <tt class="literal"><span class="pre">r</span></tt> is 81equivalent to <tt class="literal"><span class="pre">s</span></tt> except that</p> 82<pre class="literal-block"> 83<a href="./at.html" class="identifier">at</a>< r, <a href="./key-type.html" class="identifier">key_type</a><s,x>::type >::type 84</pre> 85<p class="last">is identical to <tt class="literal"><span class="pre"><a href="./value-type.html" class="identifier">value_type</a><s,x>::type</span></tt>; see <a class="reference internal" href="./insert.html">insert</a>.</p> 86</td> 87</tr> 88<tr><td><tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,pos,x>::type</span></tt></td> 89<td>Equivalent to <tt class="literal"><span class="pre"><a href="./insert.html" class="identifier">insert</a><s,x>::type</span></tt>; <tt class="literal"><span class="pre">pos</span></tt> is ignored; 90see <a class="reference internal" href="./insert.html">insert</a>.</td> 91</tr> 92<tr><td><tt class="literal"><span class="pre"><a href="./erase-key.html" class="identifier">erase_key</a><s,k>::type</span></tt></td> 93<td>Erases elements in <tt class="literal"><span class="pre">s</span></tt> associated with the key <tt class="literal"><span class="pre">k</span></tt>; 94the resulting sequence <tt class="literal"><span class="pre">r</span></tt> is equivalent to <tt class="literal"><span class="pre">s</span></tt> except 95that <tt class="literal"><span class="pre"><a href="./has-key.html" class="identifier">has_key</a><r,k>::value</span> <span class="pre">==</span> <span class="pre">false</span></tt>; see <a class="reference internal" href="./erase-key.html">erase_key</a>.</td> 96</tr> 97<tr><td><tt class="literal"><span class="pre"><a href="./erase.html" class="identifier">erase</a><s,pos>::type</span></tt></td> 98<td>Erases the element at a specific position; equivalent to 99<tt class="literal"><span class="pre"><a href="./erase-key.html" class="identifier">erase_key</a><s,</span> <span class="pre"><a href="./deref.html" class="identifier">deref</a><pos>::type</span> <span class="pre">>::type</span></tt>; see <a class="reference internal" href="./erase.html">erase</a>.</td> 100</tr> 101<tr><td><tt class="literal"><span class="pre"><a href="./clear.html" class="identifier">clear</a><s>::type</span></tt></td> 102<td>An empty sequence concept-identical to <tt class="literal"><span class="pre">s</span></tt>; see 103<a class="reference internal" href="./clear.html">clear</a>.</td> 104</tr> 105</tbody> 106</table> 107<!-- Invariants 108- - - - - - - - - - 109 110For any extensible associative sequence ``s`` the following invariants always hold: --> 111</div> 112<div class="section" id="id38"> 113<h3><a class="subsection-title" href="#models" name="models">Models</a></h3> 114<ul class="simple"> 115<li><a class="reference internal" href="./set.html">set</a></li> 116<li><a class="reference internal" href="./map.html">map</a></li> 117</ul> 118<!-- * |multiset| --> 119</div> 120<div class="section" id="id39"> 121<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3> 122<p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./associative-sequence.html">Associative Sequence</a>, <a class="reference internal" href="./insert.html">insert</a>, <a class="reference internal" href="./erase.html">erase</a>, <a class="reference internal" href="./clear.html">clear</a></p> 123<!-- Sequences/Concepts//Integral Sequence Wrapper |90 --> 124</div> 125</div> 126 127<div class="footer-separator"></div> 128<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./associative-sequence.html" class="navigation-link">Prev</a> <a href="./integral-sequence-wrapper.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./associative-sequence.html" class="navigation-link">Back</a> <a href="./integral-sequence-wrapper.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./concepts.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> 129<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> 130Distributed under the Boost Software License, Version 1.0. (See accompanying 131file 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> 132</html> 133