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regex: added documentation about multiple dots syntax error (#11147)

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penguindark 2021-08-12 07:54:57 +02:00 committed by GitHub
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vlib/regex/README.md
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@ -133,17 +133,17 @@ Suppose you have `abccc ddeef` as a source string, that you want to parse
with a regex. The following table show the query strings and the result of with a regex. The following table show the query strings and the result of
parsing source string. parsing source string.
+--------------+-------------+
| query string | result | | query string | result |
|--------------|-------------| |--------------|-------------|
| `.*c` | `abc` | | `.*c` | `abc` |
| `.*dd` | `abcc dd` | | `.*dd` | `abcc dd` |
| `ab.*e` | `abccc dde` | | `ab.*e` | `abccc dde` |
| `ab.{3} .*e` | `abccc dde` | | `ab.{3} .*e` | `abccc dde` |
+--------------+-------------+
The dot matches any character, until the next token match is satisfied. The dot matches any character, until the next token match is satisfied.
**Important Note:** *Consecutive dots, for example `...`, are not allowed.*
*This will cause a syntax error. Use a quantifier instead.*
### OR token ### OR token
The token `|`, means a logic OR operation between two consecutive tokens, The token `|`, means a logic OR operation between two consecutive tokens,