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 |