| \a | Alert | ✓ | ✓ | ✓ | | ✓ |
| \b | Backspace | ✓ | ✓ | ✓ | ✓ | ✓ |
| \n | Newline | ✓ | ✓ | ✓ | ✓ | ✓ |
| \r | Carriage return | ✓ | ✓ | ✓ | ✓ | ✓ |
| \f | Form feed | ✓ | ✓ | ✓ | ✓ | ✓ |
| \t | Horizontal tab | ✓ | ✓ | ✓ | ✓ | ✓ |
| \octal | Character specified by a three-digit octal code | ✓ | ✓ | ✓ | | |
| […] | Range or character class | ✓ | ✓ | ✓ | ✓ | ✓ |
| [^…] | Not in range or negated character class | ✓ | ✓ | ✓ | ✓ | ✓ |
| . | (dot or point) Any character except newline | ✓ | ✓ | ✓ | ✓ | ✓ |
| \w | Word character [a-zA-Z0-9_] | ✓ | ✓ | ✓ | ✓ | ✓ |
| \W | Nonword character [^a-zA-Z0-9_] | ✓ | ✓ | ✓ | ✓ | ✓ |
| \d | Digit character [0-9] | ✓ | ✓ | ✓ | ✓ | ✓ |
| \D | Nondigit character [^0-9] | ✓ | ✓ | ✓ | ✓ | ✓ |
| \s | Whitespace character [\n\r\f\t] | ✓ | ✓ | ✓ | ✓ | ✓ |
| \S | Nonwhitespace character [^\n\r\f\t] | ✓ | ✓ | ✓ | ✓ | ✓ |
| ^ | (caret) The start of the line of text | ✓ | ✓ | ✓ | ✓ | ✓ |
| \A | Start of search string, in all match modes | ✓ | ✓ | ✓ | | ✓ |
| $ | (dollar) The end of the line of text | ✓ | ✓ | ✓ | ✓ | ✓ |
| \Z | End of string, or the point before a string-ending newline, in any match mode | ✓ | ✓ | ✓ | | ✓ |
| \b | Word boundary | ✓ | ✓ | ✓ | ✓ | ✓ |
| \B | Not-word-boundary | ✓ | ✓ | ✓ | ✓ | ✓ |
| (?=…) | Positive lookahead | ✓ | ✓ | ✓ | ✓ | ✓ |
| (?!…) | Negative lookahead | ✓ | ✓ | ✓ | ✓ | ✓ |
| (?<=…) | Positive lookbehind | ✓ | ✓ | ✓ | | ✓ |
| (?<!…) | Negative lookbehind | ✓ | ✓ | ✓ | | ✓ |
| i | Case-insensitive matching | ✓ | ✓ | ✓ | ✓ | ✓ |
| m | ^ and $ match next to embedded \n | ✓ | ✓ | ✓ | ✓ | ✓ |
| s | Dot (.) matches newline | ✓ | ✓ | ✓ | | |
| x | Ignore whitespace, and allow comments (#) in pattern | ✓ | ✓ | ✓ | | ✓ |
| (?mode) | Turn list modes on for the rest of the subexpression | ✓ | ✓ | ✓ | | |
| (?#…) | Treat substring as a comment | ✓ | ✓ | ✓ | | ✓ |
| #… | Rest of the line is treated as a comment in x mode | ✓ | ✓ | ✓ | | ✓ |
| (…) | Group subpattern and capture submatch into \1, \2, .. | ✓ | ✓ | ✓ | ✓ | ✓ |
| \n | Contains the result of nth earlier submatch from a parentheses capture group, or a named capture group | ✓ | ✓ | ✓ | ✓ | ✓ |
| (?:…) | Groups subpattern, but does not capture submatch | ✓ | ✓ | ✓ | ✓ | ✓ |
| …|… | Try subpatterns in alternation | ✓ | ✓ | ✓ | ✓ | ✓ |
| * | (asterisk or star) Match 0 or more times | ✓ | ✓ | ✓ | ✓ | ✓ |
| + | (plus) Match 1 or more times | ✓ | ✓ | ✓ | ✓ | ✓ |
| ? | (question mark) Match 1 or 0 times | ✓ | ✓ | ✓ | ✓ | ✓ |
| {n} | Match exactly n times | ✓ | ✓ | ✓ | ✓ | ✓ |
| {n,} | Match at least n times | | ✓ | ✓ | ✓ | ✓ |
| {x,y} | Match at least x times, but no more than y times | ✓ | ✓ | ✓ | ✓ | ✓ |
| *? | Match 0 or more times, but a few times as possible | ✓ | ✓ | ✓ | ✓ | ✓ |
| +? | Match 1 or more times, but a few times as possible | ✓ | ✓ | ✓ | ✓ | ✓ |
| ?? | Match 0 or 1 times, but as few times as possible | ✓ | ✓ | ✓ | ✓ | ✓ |
| {x,y}? | Match at least x times, no more than y times, and as few times as possible | ✓ | ✓ | ✓ | ✓ | ✓ |