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nac3artiq: host object supports typevar

This commit is contained in:
pca006132 2021-10-08 22:43:23 +08:00
parent c5bcd352a5
commit a07674a042
1 changed files with 40 additions and 25 deletions
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29
nac3artiq/src/symbol_resolver.rs
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@ -120,7 +120,19 @@ impl Resolver {
..
} = &*def
{
if type_vars.is_empty() {
let var_map: HashMap<_, _> = type_vars
.iter()
.map(|var| {
(
if let TypeEnum::TVar { id, .. } = &*unifier.get_ty(*var) {
*id
} else {
unreachable!()
},
unifier.get_fresh_var().0,
)
})
.collect();
let mut fields_ty = HashMap::new();
for method in methods.iter() {
fields_ty.insert(method.0, method.1);
@ -131,21 +143,24 @@ impl Resolver {
let ty = self
.get_obj_type(field_data, helper, unifier, defs, primitives)?
.unwrap_or(primitives.none);
if unifier.unify(ty, field.1).is_err() {
let field_ty = unifier.subst(field.1, &var_map).unwrap_or(field.1);
if unifier.unify(ty, field_ty).is_err() {
// field type mismatch
return Ok(None);
}
fields_ty.insert(field.0, ty);
}
for (_, ty) in var_map.iter() {
// must be concrete type
if !unifier.is_concrete(*ty, &[]) {
return Ok(None)
}
}
Ok(Some(unifier.add_ty(TypeEnum::TObj {
obj_id: *object_id,
fields: RefCell::new(fields_ty),
params: Default::default(),
params: RefCell::new(var_map),
})))
} else {
// type var is not supported for now
Ok(None)
}
} else {
// only object is supported, functions are not supported
Ok(None)