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check protocols nominally, too

This commit is contained in:
Douglas Creager 2025-12-15 19:34:07 -05:00
parent 3ff8a3c3db
commit b55afcd48f
1 changed files with 23 additions and 8 deletions
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31
crates/ty_python_semantic/src/types/instance.rs
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@ -133,14 +133,29 @@ impl<'db> Type<'db> {
disjointness_visitor: &IsDisjointVisitor<'db>,
) -> ConstraintSet<'db> {
let structurally_satisfied = if let Type::ProtocolInstance(self_protocol) = self {
self_protocol.interface(db).has_relation_to_impl(
db,
protocol.interface(db),
inferable,
relation,
relation_visitor,
disjointness_visitor,
)
let self_as_nominal = self_protocol.as_nominal_type();
let other_as_nominal = protocol.as_nominal_type();
let nominal_match = match self_as_nominal.zip(other_as_nominal) {
Some((self_as_nominal, other_as_nominal)) => self_as_nominal.has_relation_to_impl(
db,
other_as_nominal,
inferable,
relation,
relation_visitor,
disjointness_visitor,
),
_ => ConstraintSet::from(false),
};
nominal_match.or(db, || {
self_protocol.interface(db).has_relation_to_impl(
db,
protocol.interface(db),
inferable,
relation,
relation_visitor,
disjointness_visitor,
)
})
} else {
protocol
.inner