| Marcel van Lohuizen | f3cd848 | 2019-09-12 15:04:04 +0200 | [diff] [blame] | 1 | cue eval -i regexp.cue |
| 2 | cmp stdout expect-stdout-cue |
| 3 | |
| 4 | -- frontmatter.toml -- |
| 5 | title = "Regular expressions" |
| 6 | description = "" |
| 7 | |
| 8 | -- text.md -- |
| 9 | The `=~` and `!~` operators can be used to check against regular expressions. |
| 10 | |
| 11 | The expression `a =~ b` is true if `a` matches `b`, while |
| 12 | `a !~ b` is true if `a` does _not_ match `b`. |
| 13 | |
| 14 | Just as with comparison operators, these operators may be used |
| 15 | as unary versions to define a set of strings. |
| 16 | |
| 17 | -- regexp.cue -- |
| 18 | a: "foo bar" =~ "foo [a-z]{3}" |
| 19 | b: "maze" !~ "^[a-z]{3}$" |
| 20 | |
| 21 | c: =~"^[a-z]{3}$" // any string with lowercase ASCII of length 3 |
| 22 | |
| 23 | d: c |
| 24 | d: "foo" |
| 25 | |
| 26 | e: c |
| 27 | e: "foo bar" |
| 28 | |
| 29 | -- expect-stdout-cue -- |
| 30 | a: true |
| 31 | b: true |
| 32 | c: =~"^[a-z]{3}$" |
| 33 | d: "foo" |
| 34 | e: _|_ // invalid value "foo bar" (does not match =~"^[a-z]{3}$") |
