1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>charT Requirements</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="Boost.Regex 5.1.4"> 8<link rel="up" href="../concepts.html" title="Concepts"> 9<link rel="prev" href="../concepts.html" title="Concepts"> 10<link rel="next" href="traits_concept.html" title="Traits Class Requirements"> 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="../concepts.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.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="traits_concept.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h4 class="title"> 27<a name="boost_regex.ref.concepts.charT_concept"></a><a class="link" href="charT_concept.html" title="charT Requirements">charT Requirements</a> 28</h4></div></div></div> 29<p> 30 Type <code class="computeroutput"><span class="identifier">charT</span></code> used a template 31 argument to class template <a class="link" href="../basic_regex.html" title="basic_regex"><code class="computeroutput"><span class="identifier">basic_regex</span></code></a>, must have a trivial 32 default constructor, copy constructor, assignment operator, and destructor. 33 In addition the following requirements must be met for objects; <span class="emphasis"><em>c</em></span> 34 of type <code class="computeroutput"><span class="identifier">charT</span></code>, <span class="emphasis"><em>c1</em></span> 35 and <span class="emphasis"><em>c2</em></span> of type <code class="computeroutput"><span class="identifier">charT</span> 36 <span class="keyword">const</span></code>, and <span class="emphasis"><em>i</em></span> 37 of type <code class="computeroutput"><span class="keyword">int</span></code>: 38 </p> 39<div class="informaltable"><table class="table"> 40<colgroup> 41<col> 42<col> 43<col> 44</colgroup> 45<thead><tr> 46<th> 47 <p> 48 Expression 49 </p> 50 </th> 51<th> 52 <p> 53 Return type 54 </p> 55 </th> 56<th> 57 <p> 58 Assertion / Note / Pre- / Post-condition 59 </p> 60 </th> 61</tr></thead> 62<tbody> 63<tr> 64<td> 65 <p> 66 charT c 67 </p> 68 </td> 69<td> 70 <p> 71 charT 72 </p> 73 </td> 74<td> 75 <p> 76 Default constructor (must be trivial). 77 </p> 78 </td> 79</tr> 80<tr> 81<td> 82 <p> 83 charT c(c1) 84 </p> 85 </td> 86<td> 87 <p> 88 charT 89 </p> 90 </td> 91<td> 92 <p> 93 Copy constructor (must be trivial). 94 </p> 95 </td> 96</tr> 97<tr> 98<td> 99 <p> 100 c1 = c2 101 </p> 102 </td> 103<td> 104 <p> 105 charT 106 </p> 107 </td> 108<td> 109 <p> 110 Assignment operator (must be trivial). 111 </p> 112 </td> 113</tr> 114<tr> 115<td> 116 <p> 117 c1 == c2 118 </p> 119 </td> 120<td> 121 <p> 122 bool 123 </p> 124 </td> 125<td> 126 <p> 127 true if c1 has the same value as c2. 128 </p> 129 </td> 130</tr> 131<tr> 132<td> 133 <p> 134 c1 != c2 135 </p> 136 </td> 137<td> 138 <p> 139 bool 140 </p> 141 </td> 142<td> 143 <p> 144 true if c1 and c2 are not equal. 145 </p> 146 </td> 147</tr> 148<tr> 149<td> 150 <p> 151 c1 < c2 152 </p> 153 </td> 154<td> 155 <p> 156 bool 157 </p> 158 </td> 159<td> 160 <p> 161 true if the value of c1 is less than c2. 162 </p> 163 </td> 164</tr> 165<tr> 166<td> 167 <p> 168 c1 > c2 169 </p> 170 </td> 171<td> 172 <p> 173 bool 174 </p> 175 </td> 176<td> 177 <p> 178 true if the value of c1 is greater than c2. 179 </p> 180 </td> 181</tr> 182<tr> 183<td> 184 <p> 185 c1 <= c2 186 </p> 187 </td> 188<td> 189 <p> 190 bool 191 </p> 192 </td> 193<td> 194 <p> 195 true if c1 is less than or equal to c2. 196 </p> 197 </td> 198</tr> 199<tr> 200<td> 201 <p> 202 c1 >= c2 203 </p> 204 </td> 205<td> 206 <p> 207 bool 208 </p> 209 </td> 210<td> 211 <p> 212 true if c1 is greater than or equal to c2. 213 </p> 214 </td> 215</tr> 216<tr> 217<td> 218 <p> 219 intmax_t i = c1 220 </p> 221 </td> 222<td> 223 <p> 224 int 225 </p> 226 </td> 227<td> 228 <p> 229 charT must be convertible to an integral type. 230 </p> 231 <p> 232 Note: type charT is not required to support this operation, if 233 the traits class used supports the full Boost-specific interface, 234 rather than the minimal standardised-interface (see traits class 235 requirements below). 236 </p> 237 </td> 238</tr> 239<tr> 240<td> 241 <p> 242 charT c(i); 243 </p> 244 </td> 245<td> 246 <p> 247 charT 248 </p> 249 </td> 250<td> 251 <p> 252 charT must be constructable from an integral type. 253 </p> 254 </td> 255</tr> 256</tbody> 257</table></div> 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 © 1998-2013 John Maddock<p> 262 Distributed under the Boost Software License, Version 1.0. (See accompanying 263 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>) 264 </p> 265</div></td> 266</tr></table> 267<hr> 268<div class="spirit-nav"> 269<a accesskey="p" href="../concepts.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../concepts.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="traits_concept.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 270</div> 271</body> 272</html> 273
