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Alex Waygood ca0cce3f9c [red-knot] Fix more [redundant-cast] false positives (#17170 ) Fixes #17164. Simply checking whether one type is gradually equivalent to another is too simplistic here: `Any` is gradually equivalent to `Todo`, but we should permit users to cast from `Todo` or `Unknown` to `Any` without complaining about it. This changes our logic so that we only complain about redundant casts if: - the two types are exactly equal (when normalized) OR they are equivalent (we'll still complain about `Any -> Any` casts, and about `Any \| str \| int` -> `str \| int \| Any` casts, since their normalized forms are exactly equal, even though the type is not fully static -- and therefore does not participate in equivalence relations) - AND the casted type does not contain `Todo`	2025-04-03 15:00:00 +01:00
..
mdtest	[red-knot] Fix more [redundant-cast] false positives (#17170 )	2025-04-03 15:00:00 +01:00
README.md	[red-knot] document test framework (#13695 )	2024-10-10 12:02:01 -07:00

[red-knot] Fix more [redundant-cast] false positives (#17170 )

Fixes #17164. Simply checking whether one type is gradually equivalent
to another is too simplistic here: `Any` is gradually equivalent to
`Todo`, but we should permit users to cast from `Todo` or `Unknown` to
`Any` without complaining about it. This changes our logic so that we
only complain about redundant casts if:
- the two types are exactly equal (when normalized) OR they are
equivalent (we'll still complain about `Any -> Any` casts, and about
`Any | str | int` -> `str | int | Any` casts, since their normalized
forms are exactly equal, even though the type is not fully static -- and
therefore does not participate in equivalence relations)
- AND the casted type does not contain `Todo`

2025-04-03 15:00:00 +01:00

mdtest

[red-knot] Fix more [redundant-cast] false positives (#17170 )

2025-04-03 15:00:00 +01:00

README.md

[red-knot] document test framework (#13695 )

2024-10-10 12:02:01 -07:00

README.md

Markdown files within the mdtest/ subdirectory are tests of type inference and type checking; executed by the tests/mdtest.rs integration test.

See crates/red_knot_test/README.md for documentation of this test format.