all Unicode matching characters
p4raw-id: //depot/perl@32230
list ops () capture
not (?:) no capture REGEX CHARCLASSES
and [] character class . == [^\n]
- or xor | alternation \s == [\x20\f\t\r\n]
- \b word boundary \w == [A-Za-z0-9_]
- \z string end \d == [0-9]
+ or xor | alternation \s == whitespace
+ \b word boundary \w == word characters
+ \z string end \d == digits
DO \S, \W and \D negate
use strict; DON'T
use warnings; "$foo" LINKS