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expand meaning of ~? diagnostic annotation #2454

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Jun 4, 2025
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expand meaning of ~? diagnostic annotation #2454

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8 changes: 6 additions & 2 deletions src/tests/ui.md
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Expand Up @@ -220,8 +220,12 @@ negligible (i.e. there is no semantic difference between `//~ ERROR` and
`//~ERROR` although the former is more common in the codebase).

`~? <diagnostic kind>` (example being `~? ERROR`)
is used to match diagnostics without line information.
These can be placed on any line in the test file, but are conventionally placed at the end.
is used to match diagnostics _without_ line info at all,
or where the line info is outside the main test file[^main test file].
These annotations can be placed on any line in the test file.

[^main test file]: This is a file that has the `~?` annotations,
as distinct from aux files, or sources that we have no control over.

### Error annotation examples

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