This page describes regular expressions that can be used for Conversions (convert) of config.yml.
Character class
| Regular expression | Description |
|---|
| . | An arbitrary character (except new-line characters) |
| [] | Any one of the characters
Example) [xyz], [x-z] |
| [^] | None of the characters
Example) [^xyz], [^x-z] |
| \d | Decimal digit [0-9] |
| \D | Non-decimal digit [^0-9] |
| \w | Word constituent character [a-zA-Z0-9_] |
| \W | Non-word constituent character [^a-zA-Z0-9_] |
| \s | Space character [ \t\r\n\f] |
| \S | Non-space character [^ \t\r\n\f] |
Repetition
| Regular expression | Description |
|---|
| * | 0 times or more (longest match) |
| + | 1 time or more (longest match) |
| ? | 0 times or 1 time (longest match) |
| {n} | Just n times (n is a numeric character) |
| {n,} | n times or more (n is a numeric character) (longest match) |
| {n,m} | At least n and at most m times (n and m are numeric characters) (longest match) |
*? | 0 times or more (shortest match) |
| +? | 1 time or more (shortest match) |
| ?? | 0 times or 1 time (shortest match) |
| {n}? | Just n times (n is a numeric character) |
| {n,}? | n times or more (n is a numeric character) (shortest match) |
| {n,m}? | At least n and at most m times (n and m are numeric characters) (shortest match) |
Capture and grouping
| Regular expression | Description |
|---|
| (pat) | Regular capture and grouping |
| (?:pat) | Grouping without capturing |
Selector
| Regular expression | Description |
|---|
| pat1|pat2 | Either matches |
Anchor
| Regular expression | Description |
|---|
| ^ | Match the line head |
| $ | Match the line end |
| \A | Match the head of a string |
| \z | Match the end of a string |
| \b | Match word boundary |
| \B | Match non-word boundary |