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Ayaz Hafiz 2023-01-13 11:56:26 -06:00
parent 2f74d0b1b9
commit 91d61424ad
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2 changed files with 10 additions and 12 deletions
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20
crates/compiler/unify/src/unify.rs
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@ -2426,18 +2426,16 @@ fn unify_tag_ext<M: MetaCollector>(
// Openness extensions can either unify with empty tag unions (marking them as closed),
// or flex/rigids. Anything else is a change in the monomorphic size of the tag and not
// a reflection of the polymorphism of the tag, an error.
match env.subs.get_content_without_compacting(var) {
FlexVar(..) | RigidVar(..) | FlexAbleVar(..) | RigidAbleVar(..) => true,
Structure(s) => match s {
FlatType::EmptyTagUnion => true,
_ => false,
},
Error => {
matches!(
env.subs.get_content_without_compacting(var),
FlexVar(..)
| RigidVar(..)
| FlexAbleVar(..)
| RigidAbleVar(..)
| Structure(FlatType::EmptyTagUnion)
// errors propagate
true
}
_ => false,
}
| Error,
)
}
TagExt::Any(_) => true,
};