Global lower
boost::xpressive::lower — Matches a lower-case character. 
 
Synopsis
Description
The regex traits are used to determine which characters are lower-case. To match any character that is not a lower-case character, use ~lower.
| ![[Note]](../../../../doc/src/images/note.png) | Note | 
| lower is equivalent to /[[:lower:]]/ in perl. ~lower is equivalent to /[[:^lower:]]/ in perl.  |