1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Character Classes that are Always Supported</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="../character_classes.html" title="Character Class Names"> 9<link rel="prev" href="../character_classes.html" title="Character Class Names"> 10<link rel="next" href="optional_char_class_names.html" title="Character classes that are supported by Unicode Regular Expressions"> 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 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class="title"> 27<a name="boost_regex.syntax.character_classes.std_char_classes"></a><a class="link" href="std_char_classes.html" title="Character Classes that are Always Supported">Character 28 Classes that are Always Supported</a> 29</h4></div></div></div> 30<p> 31 The following character class names are always supported by Boost.Regex: 32 </p> 33<div class="informaltable"><table class="table"> 34<colgroup> 35<col> 36<col> 37<col> 38</colgroup> 39<thead><tr> 40<th> 41 <p> 42 Name 43 </p> 44 </th> 45<th> 46 <p> 47 POSIX-standard name 48 </p> 49 </th> 50<th> 51 <p> 52 Description 53 </p> 54 </th> 55</tr></thead> 56<tbody> 57<tr> 58<td> 59 <p> 60 alnum 61 </p> 62 </td> 63<td> 64 <p> 65 Yes 66 </p> 67 </td> 68<td> 69 <p> 70 Any alpha-numeric character. 71 </p> 72 </td> 73</tr> 74<tr> 75<td> 76 <p> 77 alpha 78 </p> 79 </td> 80<td> 81 <p> 82 Yes 83 </p> 84 </td> 85<td> 86 <p> 87 Any alphabetic character. 88 </p> 89 </td> 90</tr> 91<tr> 92<td> 93 <p> 94 blank 95 </p> 96 </td> 97<td> 98 <p> 99 Yes 100 </p> 101 </td> 102<td> 103 <p> 104 Any whitespace character that is not a line separator. 105 </p> 106 </td> 107</tr> 108<tr> 109<td> 110 <p> 111 cntrl 112 </p> 113 </td> 114<td> 115 <p> 116 Yes 117 </p> 118 </td> 119<td> 120 <p> 121 Any control character. 122 </p> 123 </td> 124</tr> 125<tr> 126<td> 127 <p> 128 d 129 </p> 130 </td> 131<td> 132 <p> 133 No 134 </p> 135 </td> 136<td> 137 <p> 138 Any decimal digit 139 </p> 140 </td> 141</tr> 142<tr> 143<td> 144 <p> 145 digit 146 </p> 147 </td> 148<td> 149 <p> 150 Yes 151 </p> 152 </td> 153<td> 154 <p> 155 Any decimal digit. 156 </p> 157 </td> 158</tr> 159<tr> 160<td> 161 <p> 162 graph 163 </p> 164 </td> 165<td> 166 <p> 167 Yes 168 </p> 169 </td> 170<td> 171 <p> 172 Any graphical character. 173 </p> 174 </td> 175</tr> 176<tr> 177<td> 178 <p> 179 l 180 </p> 181 </td> 182<td> 183 <p> 184 No 185 </p> 186 </td> 187<td> 188 <p> 189 Any lower case character. 190 </p> 191 </td> 192</tr> 193<tr> 194<td> 195 <p> 196 lower 197 </p> 198 </td> 199<td> 200 <p> 201 Yes 202 </p> 203 </td> 204<td> 205 <p> 206 Any lower case character. 207 </p> 208 </td> 209</tr> 210<tr> 211<td> 212 <p> 213 print 214 </p> 215 </td> 216<td> 217 <p> 218 Yes 219 </p> 220 </td> 221<td> 222 <p> 223 Any printable character. 224 </p> 225 </td> 226</tr> 227<tr> 228<td> 229 <p> 230 punct 231 </p> 232 </td> 233<td> 234 <p> 235 Yes 236 </p> 237 </td> 238<td> 239 <p> 240 Any punctuation character. 241 </p> 242 </td> 243</tr> 244<tr> 245<td> 246 <p> 247 s 248 </p> 249 </td> 250<td> 251 <p> 252 No 253 </p> 254 </td> 255<td> 256 <p> 257 Any whitespace character. 258 </p> 259 </td> 260</tr> 261<tr> 262<td> 263 <p> 264 space 265 </p> 266 </td> 267<td> 268 <p> 269 Yes 270 </p> 271 </td> 272<td> 273 <p> 274 Any whitespace character. 275 </p> 276 </td> 277</tr> 278<tr> 279<td> 280 <p> 281 unicode 282 </p> 283 </td> 284<td> 285 <p> 286 No 287 </p> 288 </td> 289<td> 290 <p> 291 Any extended character whose code point is above 255 in value. 292 </p> 293 </td> 294</tr> 295<tr> 296<td> 297 <p> 298 u 299 </p> 300 </td> 301<td> 302 <p> 303 No 304 </p> 305 </td> 306<td> 307 <p> 308 Any upper case character. 309 </p> 310 </td> 311</tr> 312<tr> 313<td> 314 <p> 315 upper 316 </p> 317 </td> 318<td> 319 <p> 320 Yes 321 </p> 322 </td> 323<td> 324 <p> 325 Any upper case character. 326 </p> 327 </td> 328</tr> 329<tr> 330<td> 331 <p> 332 w 333 </p> 334 </td> 335<td> 336 <p> 337 No 338 </p> 339 </td> 340<td> 341 <p> 342 Any word character (alphanumeric characters plus the underscore). 343 </p> 344 </td> 345</tr> 346<tr> 347<td> 348 <p> 349 word 350 </p> 351 </td> 352<td> 353 <p> 354 No 355 </p> 356 </td> 357<td> 358 <p> 359 Any word character (alphanumeric characters plus the underscore). 360 </p> 361 </td> 362</tr> 363<tr> 364<td> 365 <p> 366 xdigit 367 </p> 368 </td> 369<td> 370 <p> 371 Yes 372 </p> 373 </td> 374<td> 375 <p> 376 Any hexadecimal digit character. 377 </p> 378 </td> 379</tr> 380</tbody> 381</table></div> 382</div> 383<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 384<td align="left"></td> 385<td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p> 386 Distributed under the Boost Software License, Version 1.0. (See accompanying 387 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>) 388 </p> 389</div></td> 390</tr></table> 391<hr> 392<div class="spirit-nav"> 393<a accesskey="p" href="../character_classes.html"><img src="../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../character_classes.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="optional_char_class_names.html"><img src="../../../../../../../doc/src/images/next.png" alt="Next"></a> 394</div> 395</body> 396</html> 397
