| cue eval -i bottom.cue |
| cmp stdout expect-stdout-cue |
| |
| -- frontmatter.toml -- |
| title = "Bottom / Error" |
| description = "" |
| |
| -- text.md -- |
| Specifying duplicate fields with conflicting values results in an error |
| or bottom. |
| _Bottom_ is a special value in CUE, denoted `_|_`, that indicates an |
| error such as conflicting values. |
| Any error in CUE results in `_|_`. |
| Logically all errors are equal, although errors may be associated with |
| metadata such as an error message. |
| |
| Note that an error is different from `null`: `null` is a valid value, |
| whereas `_|_` is not. |
| |
| -- bottom.cue -- |
| a: 4 |
| a: 5 |
| |
| l: [ 1, 2 ] |
| l: [ 1, 3 ] |
| |
| list: [0, 1, 2] |
| val: list[3] |
| |
| -- expect-stdout-cue -- |
| list: [0, 1, 2] |
| a: _|_ // conflicting values 4 and 5 |
| l: [1, _|_, // conflicting values 2 and 3 |
| ] |
| val: _|_ // index 3 out of bounds |
