1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>set</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. Fusion 2.2"> 8<link rel="up" href="../container.html" title="Container"> 9<link rel="prev" href="back_extended_deque.html" title="back_extended_deque"> 10<link rel="next" href="map.html" title="map"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="back_extended_deque.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../container.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="map.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h3 class="title"> 27<a name="fusion.container.set"></a><a class="link" href="set.html" title="set">set</a> 28</h3></div></div></div> 29<h5> 30<a name="fusion.container.set.h0"></a> 31 <span class="phrase"><a name="fusion.container.set.description"></a></span><a class="link" href="set.html#fusion.container.set.description">Description</a> 32 </h5> 33<p> 34 set is an <a class="link" href="../sequence/concepts/associative_sequence.html" title="Associative Sequence">Associative 35 Sequence</a> of heterogeneous typed data elements. Type identity is used 36 to impose an equivalence relation on keys. The element's type is its key. 37 A set may contain at most one element for each key. Membership testing and 38 element key lookup has constant runtime complexity (see <a class="link" href="../notes.html#fusion.notes.overloaded_functions">Overloaded 39 Functions</a>). 40 </p> 41<h5> 42<a name="fusion.container.set.h1"></a> 43 <span class="phrase"><a name="fusion.container.set.header"></a></span><a class="link" href="set.html#fusion.container.set.header">Header</a> 44 </h5> 45<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">set</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 46<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">set</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 47<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">set</span><span class="special">/</span><span class="identifier">set_fwd</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 48<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">set_fwd</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 49</pre> 50<h5> 51<a name="fusion.container.set.h2"></a> 52 <span class="phrase"><a name="fusion.container.set.synopsis"></a></span><a class="link" href="set.html#fusion.container.set.synopsis">Synopsis</a> 53 </h5> 54<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span> 55 <span class="keyword">typename</span> <span class="identifier">T0</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span> 56 <span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span> 57 <span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span> 58 <span class="special">...</span> 59 <span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">TN</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span> 60<span class="special">></span> 61<span class="keyword">struct</span> <span class="identifier">set</span><span class="special">;</span> 62</pre> 63<p> 64 For C++11 compilers, the variadic function interface has no upper bound. 65 </p> 66<p> 67 For C++03 compilers, the variadic class interface accepts <code class="computeroutput"><span class="number">0</span></code> 68 to <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code> elements, 69 where <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code> 70 is a user definable predefined maximum that defaults to <code class="computeroutput"><span class="number">10</span></code>. 71 Example: 72 </p> 73<pre class="programlisting"><span class="identifier">set</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">,</span> <span class="keyword">double</span><span class="special">></span> 74</pre> 75<p> 76 You may define the preprocessor constant <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code> 77 before including any Fusion header to change the default. Example: 78 </p> 79<pre class="programlisting"><span class="preprocessor">#define</span> <span class="identifier">FUSION_MAX_SET_SIZE</span> <span class="number">20</span> 80</pre> 81<h5> 82<a name="fusion.container.set.h3"></a> 83 <span class="phrase"><a name="fusion.container.set.template_parameters"></a></span><a class="link" href="set.html#fusion.container.set.template_parameters">Template 84 parameters</a> 85 </h5> 86<div class="informaltable"><table class="table"> 87<colgroup> 88<col> 89<col> 90<col> 91</colgroup> 92<thead><tr> 93<th> 94 <p> 95 Parameter 96 </p> 97 </th> 98<th> 99 <p> 100 Description 101 </p> 102 </th> 103<th> 104 <p> 105 Default 106 </p> 107 </th> 108</tr></thead> 109<tbody><tr> 110<td> 111 <p> 112 <code class="computeroutput"><span class="identifier">T0</span></code>...<code class="computeroutput"><span class="identifier">TN</span></code> 113 </p> 114 </td> 115<td> 116 <p> 117 Element types 118 </p> 119 </td> 120<td> 121 <p> 122 <span class="emphasis"><em>unspecified</em></span> 123 </p> 124 </td> 125</tr></tbody> 126</table></div> 127<h5> 128<a name="fusion.container.set.h4"></a> 129 <span class="phrase"><a name="fusion.container.set.model_of"></a></span><a class="link" href="set.html#fusion.container.set.model_of">Model 130 of</a> 131 </h5> 132<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 133<li class="listitem"> 134 <a class="link" href="../sequence/concepts/associative_sequence.html" title="Associative Sequence">Associative 135 Sequence</a> 136 </li> 137<li class="listitem"> 138 <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward Sequence</a> 139 </li> 140</ul></div> 141<div class="variablelist"> 142<p class="title"><b>Notation</b></p> 143<dl class="variablelist"> 144<dt><span class="term"><code class="computeroutput"><span class="identifier">S</span></code></span></dt> 145<dd><p> 146 A <code class="computeroutput"><span class="identifier">set</span></code> type 147 </p></dd> 148<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt> 149<dd><p> 150 An instance of <code class="computeroutput"><span class="identifier">set</span></code> 151 </p></dd> 152<dt><span class="term"><code class="computeroutput"><span class="identifier">e0</span></code>...<code class="computeroutput"><span class="identifier">en</span></code></span></dt> 153<dd><p> 154 Heterogeneous values 155 </p></dd> 156<dt><span class="term"><code class="computeroutput"><span class="identifier">fs</span></code></span></dt> 157<dd><p> 158 A <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 159 Sequence</a> 160 </p></dd> 161</dl> 162</div> 163<h5> 164<a name="fusion.container.set.h5"></a> 165 <span class="phrase"><a name="fusion.container.set.expression_semantics"></a></span><a class="link" href="set.html#fusion.container.set.expression_semantics">Expression 166 Semantics</a> 167 </h5> 168<p> 169 Semantics of an expression is defined only where it differs from, or is not 170 defined in <a class="link" href="../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random 171 Access Sequence</a> and <a class="link" href="../sequence/concepts/associative_sequence.html" title="Associative Sequence">Associative 172 Sequence</a>. 173 </p> 174<div class="informaltable"><table class="table"> 175<colgroup> 176<col> 177<col> 178</colgroup> 179<thead><tr> 180<th> 181 <p> 182 Expression 183 </p> 184 </th> 185<th> 186 <p> 187 Semantics 188 </p> 189 </th> 190</tr></thead> 191<tbody> 192<tr> 193<td> 194 <p> 195 <code class="computeroutput"><span class="identifier">S</span><span class="special">()</span></code> 196 </p> 197 </td> 198<td> 199 <p> 200 Creates a set with default constructed elements. 201 </p> 202 </td> 203</tr> 204<tr> 205<td> 206 <p> 207 <code class="computeroutput"><span class="identifier">S</span><span class="special">(</span><span class="identifier">e0</span><span class="special">,</span> 208 <span class="identifier">e1</span><span class="special">,...</span> 209 <span class="identifier">en</span><span class="special">)</span></code> 210 </p> 211 </td> 212<td> 213 <p> 214 Creates a set with elements <code class="computeroutput"><span class="identifier">e0</span></code>...<code class="computeroutput"><span class="identifier">en</span></code>. 215 </p> 216 </td> 217</tr> 218<tr> 219<td> 220 <p> 221 <code class="computeroutput"><span class="identifier">S</span><span class="special">(</span><span class="identifier">fs</span><span class="special">)</span></code> 222 </p> 223 </td> 224<td> 225 <p> 226 Copy constructs a set from a <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 227 Sequence</a> <code class="computeroutput"><span class="identifier">fs</span></code>. 228 </p> 229 </td> 230</tr> 231<tr> 232<td> 233 <p> 234 <code class="computeroutput"><span class="identifier">s</span> <span class="special">=</span> 235 <span class="identifier">fs</span></code> 236 </p> 237 </td> 238<td> 239 <p> 240 Assigns to a set, <code class="computeroutput"><span class="identifier">s</span></code>, 241 from a <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward 242 Sequence</a> <code class="computeroutput"><span class="identifier">fs</span></code>. 243 </p> 244 </td> 245</tr> 246</tbody> 247</table></div> 248<h5> 249<a name="fusion.container.set.h6"></a> 250 <span class="phrase"><a name="fusion.container.set.example"></a></span><a class="link" href="set.html#fusion.container.set.example">Example</a> 251 </h5> 252<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">set</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">float</span><span class="special">></span> <span class="identifier">S</span><span class="special">;</span> 253<span class="identifier">S</span> <span class="identifier">s</span><span class="special">(</span><span class="number">12</span><span class="special">,</span> <span class="number">5.5f</span><span class="special">);</span> 254<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <a class="link" href="../sequence/intrinsic/functions/at_key.html" title="at_key"><code class="computeroutput"><span class="identifier">at_key</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">s</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 255<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <a class="link" href="../sequence/intrinsic/functions/at_key.html" title="at_key"><code class="computeroutput"><span class="identifier">at_key</span></code></a><span class="special"><</span><span class="keyword">float</span><span class="special">>(</span><span class="identifier">s</span><span class="special">)</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 256<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <a class="link" href="../sequence/intrinsic/metafunctions/has_key.html" title="has_key"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">has_key</span></code></a><span class="special"><</span><span class="identifier">S</span><span class="special">,</span> <span class="keyword">double</span><span class="special">>::</span><span class="identifier">value</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span> 257</pre> 258</div> 259<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 260<td align="left"></td> 261<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 262 Dan Marsden, Tobias Schwinger<p> 263 Distributed under the Boost Software License, Version 1.0. (See accompanying 264 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 265 </p> 266</div></td> 267</tr></table> 268<hr> 269<div class="spirit-nav"> 270<a accesskey="p" href="back_extended_deque.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../container.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="map.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 271</div> 272</body> 273</html> 274
