Global blank

boost::xpressive::blank — Matches a blank (horizonal white-space) character.

Synopsis

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

 blank;

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

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