mirror of
https://github.com/astral-sh/ruff.git
synced 2025-10-02 22:55:08 +00:00
b662c3ff7e
## Summary We already have partial "support" for `assert_never`, because it is annotated as ```pyi def assert_never(arg: Never, /) -> Never: ... ``` in typeshed. So we already emit a `invalid-argument-type` diagnostic if the argument type to `assert_never` is not assignable to `Never`. That is not enough, however. Gradual types like `Any`, `Unknown`, `@Todo(…)` or `Any & int` can be assignable to `Never`. Which means that we didn't issue any diagnostic in those cases. Also, it seems like `assert_never` deserves a dedicated diagnostic message, not just a generic "invalid argument type" error. ## Test Plan New Markdown tests. |
||
|---|---|---|
| .. | ||
| resources | ||
| src | ||
| tests | ||
| build.rs | ||
| Cargo.toml | ||
| mdtest.py | ||
| mdtest.py.lock | ||