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Updated SC2076 (markdown)

koalaman
2016-01-13 12:55:51 -08:00
parent 048b94f579
commit 93e96e7289
1 changed files with 3 additions and 3 deletions
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6
SC2076.md

@@ -3,20 +3,20 @@
### Problematic code:
```sh
[[ $foo =~ "^fo+bar$" ]]
[[ $foo =~ "^fo+ bar$" ]]
```
### Correct code:
```sh
[[ $foo =~ ^fo+bar$ ]]
[[ $foo =~ ^fo+\ bar$ ]]
```
### Rationale:
Quotes on the right hand side of `=~` can be used to match literally, so that `[[ $1 =~ ^"$2".* ]]` works even if `$2` contains regex metacharacters. This mirrors the behavior of globs, `[[ $1 = "$2"* ]]`.
This also means that the problematic code tries to match literal carets and plus signs instead of interpreting them as regular expression matchers. To match as a regex, it must be unquoted.
This also means that the problematic code tries to match literal carets and plus signs instead of interpreting them as regular expression matchers. To match as a regex, the regex metacharacters it must be unquoted. Literal parts of the expression can be quoted with double or single quotes, or escaped.
### Exceptions: