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This is the documentation for a snapshot of the develop branch, built from commit 74c5a9a29c.

Global alnum

boost::xpressive::alnum — Matches an alpha-numeric character.


// In header: <boost/xpressive/regex_primitives.hpp>

unspecified alnum;


The regex traits are used to determine which characters are alpha-numeric. To match any character that is not alpha-numeric, use ~alnum.

[Note] Note

alnum is equivalent to /[[:alnum:]]/ in perl. ~alnum is equivalent to /[[:^alnum:]]/ in perl.