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[red-knot] Computing a type ordering for two non-normalized types is meaningless (#17734)

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Alex Waygood 2025-04-30 11:58:55 +01:00 • committed by GitHub
parent d94be0e780
commit b84b58760e
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1 changed files with 14 additions and 18 deletions
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32
crates/red_knot_python_semantic/src/types/type_ordering.rs
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@ -26,6 +26,17 @@ pub(super) fn union_or_intersection_elements_ordering<'db>(
left: &Type<'db>,
right: &Type<'db>,
) -> Ordering {
debug_assert_eq!(
*left,
left.normalized(db),
"`left` must be normalized before a meaningful ordering can be established"
);
debug_assert_eq!(
*right,
right.normalized(db),
"`right` must be normalized before a meaningful ordering can be established"
);
if left == right {
return Ordering::Equal;
}
@ -85,19 +96,11 @@ pub(super) fn union_or_intersection_elements_ordering<'db>(
(Type::DataclassTransformer(_), _) => Ordering::Less,
(_, Type::DataclassTransformer(_)) => Ordering::Greater,
(Type::Callable(left), Type::Callable(right)) => {
debug_assert_eq!(*left, left.normalized(db));
debug_assert_eq!(*right, right.normalized(db));
left.cmp(right)
}
(Type::Callable(left), Type::Callable(right)) => left.cmp(right),
(Type::Callable(_), _) => Ordering::Less,
(_, Type::Callable(_)) => Ordering::Greater,
(Type::Tuple(left), Type::Tuple(right)) => {
debug_assert_eq!(*left, left.normalized(db));
debug_assert_eq!(*right, right.normalized(db));
left.cmp(right)
}
(Type::Tuple(left), Type::Tuple(right)) => left.cmp(right),
(Type::Tuple(_), _) => Ordering::Less,
(_, Type::Tuple(_)) => Ordering::Greater,
@ -325,13 +328,6 @@ pub(super) fn union_or_intersection_elements_ordering<'db>(
}
(Type::Intersection(left), Type::Intersection(right)) => {
debug_assert_eq!(*left, left.normalized(db));
debug_assert_eq!(*right, right.normalized(db));
if left == right {
return Ordering::Equal;
}
// Lexicographically compare the elements of the two unequal intersections.
let left_positive = left.positive(db);
let right_positive = right.positive(db);
@ -356,7 +352,7 @@ pub(super) fn union_or_intersection_elements_ordering<'db>(
}
}
unreachable!("Two equal intersections that both have sorted elements should share the same Salsa ID")
unreachable!("Two equal, normalized intersections should share the same Salsa ID")
}
}
}