This regexp engine should implement ECMAScript Regular Expression (Unicode Mode), but currently only part of specification is implemented.
For now we have:
| RegExp | Description |
|---|---|
| . | Match any character except new line |
| x y | Match the x then y |
| x | y | Match either the x or y |
| x * | Match the x zero or more times |
| x + | Match the x one or more times |
| x ? | Match the x zero or one times |
| (:? x ) | Non-capturing group |
| ( x ) | Capturing group |
| \p{ N } | Char of the general category N |
| \P{ N } | Char not of the general category N |
| [ x ] | Character class x |
| [^** *x* **] | Character not in the class x |
| [ x - y ] | Character in range x..y |
| [\p{ N }] | Char of the general category N |
| [\P{ N }] | Char not of the general category N |
| ^ | Start of line assertion |
| $ | End of line assertion |
| \b | Word boundary assertion |
| \B | Not a word boundary assertion |
| \d | A digit (like [0-9]) |
| \D | Not a digit (like [^0-9]) |
| \s | A whitespace (like [\p{z}\r\n\t\f\v]) |
| \S | Not a whitespace |
| \w | A word character (like [A-Za-z0-9_]) |
| \W | Not a word char (like [^A-Za-z0-9_]) |
| x | Character literal x, not in ^$.*+?]{} |
| \ x | Character literal x in ^$.*+?]{} |
| \n \r \t | New line, tabulation and other controls |
| [\n\r] | The same in a character class |