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feat: implement Structural types

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This commit is contained in:
Shunsuke Shibayama 2023-02-23 01:37:54 +09:00
parent 8903e84011
commit c9dda183ab
16 changed files with 472 additions and 58 deletions
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11
crates/erg_compiler/context/unify.rs
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@ -845,6 +845,17 @@ impl Context {
Ok(())
}
}
(sub, Type::Structural(sup)) => {
let sub_fields = self.fields(sub);
for (sup_field, sup_ty) in self.fields(sup) {
if let Some((_, sub_ty)) = sub_fields.get_key_value(&sup_field) {
self.sub_unify(sub_ty, &sup_ty, loc, param_name)?;
} else {
unreachable!()
}
}
Ok(())
}
(
_,
Type::Poly {