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28 Classes that are Always Supported
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31 The following character class names are always supported by Boost.Regex:
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70 Any alpha-numeric character.
87 Any alphabetic character.
104 Any whitespace character that is not a line separator.
121 Any control character.
172 Any graphical character.
189 Any lower case character.
206 Any lower case character.
223 Any printable character.
240 Any punctuation character.
257 Any whitespace character.
274 Any whitespace character.
291 Any extended character whose code point is above
255 in value.
308 Any upper case character.
325 Any upper case character.
342 Any word character (alphanumeric characters plus the underscore).
359 Any word character (alphanumeric characters plus the underscore).
376 Any hexadecimal digit character.
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386 Distributed under the Boost Software License, Version
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