| [...] |
A single character listed or contained within a listed range. Ranges can be combined with the {+} and {-} operators. For example [a-z]{+}[0-9] is the same as [0-9a-z] and [a-z]{-}[aeiou] is the same as [b-df-hj-np-tv-z]. |
| [^...] |
A single character not listed and not contained within a listed range. |
| . |
Any character, default [^\n]. |
| \d |
Digit character, [0-9]. |
| \D |
Non-digit character, [^0-9]. |
| \s |
White space character, [ \t\n\r\f\v]. |
| \S |
Non-white space character, [^ \t\n\r\f\v]. |
| \w |
Word caracter, [a-zA-Z0-9_]. |
| \W |
Non-word caracter, [^a-zA-Z0-9_]. |
