Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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Character Classes that are Always Supported

The following character class names are always supported by Boost.Regex:

Name

POSIX-standard name

Description

alnum

Yes

Any alpha-numeric character.

alpha

Yes

Any alphabetic character.

blank

Yes

Any whitespace character that is not a line separator.

cntrl

Yes

Any control character.

d

No

Any decimal digit

digit

Yes

Any decimal digit.

graph

Yes

Any graphical character.

l

No

Any lower case character.

lower

Yes

Any lower case character.

print

Yes

Any printable character.

punct

Yes

Any punctuation character.

s

No

Any whitespace character.

space

Yes

Any whitespace character.

unicode

No

Any extended character whose code point is above 255 in value.

u

No

Any upper case character.

upper

Yes

Any upper case character.

w

No

Any word character (alphanumeric characters plus the underscore).

word

No

Any word character (alphanumeric characters plus the underscore).

xdigit

Yes

Any hexadecimal digit character.


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