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ruff/crates/red_knot_python_semantic
Alex Waygood a3f3d734a1 [red-knot] Ban list literals in most contexts in type expressions (#16847)
## Summary

This PR reworks `TypeInferenceBuilder::infer_type_expression()` so that
we emit diagnostics when encountering a list literal in a type
expression. The only place where a list literal is allowed in a type
expression is if it appears as the first argument to `Callable[]`, and
`Callable` is already heavily special-cased in our type-expression
parsing.

In order to ensure that list literals are _always_ allowed as the
_first_ argument to `Callabler` (but never allowed as the second, third,
etc. argument), I had to do some refactoring of our type-expression
parsing for `Callable` annotations.

## Test Plan

New mdtests added, and existing ones updated
2025-03-19 14:42:42 +00:00
..
2024-10-20 22:35:35 +01:00