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nac3core/toplevel: fixed typevar substitution bug

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This commit is contained in:
pca006132 2022-03-23 00:22:28 +08:00
parent 4400d9b57d
commit 41d62f7325
6 changed files with 63 additions and 18 deletions
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28
nac3artiq/src/symbol_resolver.rs
View File

@ -538,13 +538,25 @@ impl InnerResolver {
let types = types?;
Ok(types.map(|types| unifier.add_ty(TypeEnum::TTuple { ty: types })))
}
(TypeEnum::TObj { params: var_map, fields, .. }, false) => {
self.pyid_to_type.write().insert(ty_id, extracted_ty);
(TypeEnum::TObj { params, fields, .. }, false) => {
let var_map = params
.iter()
.map(|(id_var, ty)| {
if let TypeEnum::TVar { id, range, name, loc, .. } =
&*unifier.get_ty(*ty)
{
assert_eq!(*id, *id_var);
(*id, unifier.get_fresh_var_with_range(range, *name, *loc).0)
} else {
unreachable!()
}
})
.collect::<HashMap<_, _>>();
let mut instantiate_obj = || {
// loop through non-function fields of the class to get the instantiated value
for field in fields.iter() {
let name: String = (*field.0).into();
if let TypeEnum::TFunc(..) = &*unifier.get_ty(field.1 .0) {
if let TypeEnum::TFunc(..) = &*unifier.get_ty(field.1.0) {
continue;
} else {
let field_data = obj.getattr(&name)?;
@ -560,7 +572,7 @@ impl InnerResolver {
}
};
let field_ty =
unifier.subst(field.1 .0, &var_map).unwrap_or(field.1 .0);
unifier.subst(field.1.0, &var_map).unwrap_or(field.1.0);
if let Err(e) = unifier.unify(ty, field_ty) {
// field type mismatch
return Ok(Err(format!(
@ -577,14 +589,10 @@ impl InnerResolver {
return Ok(Err("object is not of concrete type".into()));
}
}
let extracted_ty = unifier.subst(extracted_ty, &var_map).unwrap_or(extracted_ty);
Ok(Ok(extracted_ty))
};
let result = instantiate_obj();
// do not cache the type if there are errors
if matches!(result, Err(_) | Ok(Err(_))) {
self.pyid_to_type.write().remove(&ty_id);
}
result
instantiate_obj()
}
_ => Ok(Ok(extracted_ty)),
}

1
nac3core/src/codegen/mod.rs
View File

@ -353,6 +353,7 @@ pub fn gen_func<'ctx, G: CodeGenerator>(
let (unifier, primitives) = &top_level_ctx.unifiers.read()[task.unifier_index];
(Unifier::from_shared_unifier(unifier), *primitives)
};
unifier.top_level = Some(top_level_ctx.clone());
let mut cache = HashMap::new();
for (a, b) in task.subst.iter() {

30
nac3core/src/toplevel/composer.rs
View File

@ -735,10 +735,11 @@ impl TopLevelComposer {
}
}
let mut subst_list = Some(Vec::new());
// unification of previously assigned typevar
let mut unification_helper = |ty, def| {
let target_ty =
get_type_from_type_annotation_kinds(&temp_def_list, unifier, primitives, &def)?;
get_type_from_type_annotation_kinds(&temp_def_list, unifier, primitives, &def, &mut subst_list)?;
unifier.unify(ty, target_ty).map_err(|e| e.to_display(unifier).to_string())?;
Ok(()) as Result<(), String>
};
@ -747,6 +748,29 @@ impl TopLevelComposer {
errors.insert(e);
}
}
for ty in subst_list.unwrap().into_iter() {
if let TypeEnum::TObj { obj_id, params, fields } = &*unifier.get_ty(ty) {
let mut new_fields = HashMap::new();
let mut need_subst = false;
for (name, (ty, mutable)) in fields.iter() {
let substituted = unifier.subst(*ty, params);
need_subst |= substituted.is_some();
new_fields.insert(*name, (substituted.unwrap_or(*ty), *mutable));
}
if need_subst {
let new_ty = unifier.add_ty(TypeEnum::TObj {
obj_id: *obj_id,
params: params.clone(),
fields: new_fields,
});
if let Err(e) = unifier.unify(ty, new_ty) {
errors.insert(e.to_display(unifier).to_string());
}
}
} else {
unreachable!()
}
}
if !errors.is_empty() {
return Err(errors.into_iter().sorted().join("\n----------\n"));
}
@ -867,6 +891,7 @@ impl TopLevelComposer {
unifier,
primitives_store,
&type_annotation,
&mut None
)?;
Ok(FuncArg {
@ -934,6 +959,7 @@ impl TopLevelComposer {
unifier,
primitives_store,
&return_ty_annotation,
&mut None
)?
} else {
primitives_store.none
@ -1498,6 +1524,7 @@ impl TopLevelComposer {
unifier,
primitives_ty,
&make_self_type_annotation(type_vars, *object_id),
&mut None
)?;
if ancestors
.iter()
@ -1666,6 +1693,7 @@ impl TopLevelComposer {
unifier,
primitives_ty,
&ty_ann,
&mut None
)?;
Some((self_ty, type_vars.clone()))
} else {

16
nac3core/src/toplevel/type_annotation.rs
View File

@ -273,6 +273,7 @@ pub fn get_type_from_type_annotation_kinds(
unifier: &mut Unifier,
primitives: &PrimitiveStore,
ann: &TypeAnnotation,
subst_list: &mut Option<Vec<Type>>
) -> Result<Type, String> {
match ann {
TypeAnnotation::CustomClass { id: obj_id, params } => {
@ -294,6 +295,7 @@ pub fn get_type_from_type_annotation_kinds(
unifier,
primitives,
x,
subst_list
)
})
.collect::<Result<Vec<_>, _>>()?;
@ -349,12 +351,16 @@ pub fn get_type_from_type_annotation_kinds(
let subst_ty = unifier.subst(*ty, &subst).unwrap_or(*ty);
(*name, (subst_ty, *mutability))
}));
Ok(unifier.add_ty(TypeEnum::TObj {
let need_subst = !subst.is_empty();
let ty = unifier.add_ty(TypeEnum::TObj {
obj_id: *obj_id,
fields: tobj_fields,
params: subst,
}))
});
if need_subst {
subst_list.as_mut().map(|wl| wl.push(ty));
}
Ok(ty)
}
} else {
unreachable!("should be class def here")
@ -367,6 +373,7 @@ pub fn get_type_from_type_annotation_kinds(
unifier,
primitives,
ty.as_ref(),
subst_list
)?;
Ok(unifier.add_ty(TypeEnum::TVirtual { ty }))
}
@ -376,6 +383,7 @@ pub fn get_type_from_type_annotation_kinds(
unifier,
primitives,
ty.as_ref(),
subst_list
)?;
Ok(unifier.add_ty(TypeEnum::TList { ty }))
}
@ -383,7 +391,7 @@ pub fn get_type_from_type_annotation_kinds(
let tys = tys
.iter()
.map(|x| {
get_type_from_type_annotation_kinds(top_level_defs, unifier, primitives, x)
get_type_from_type_annotation_kinds(top_level_defs, unifier, primitives, x, subst_list)
})
.collect::<Result<Vec<_>, _>>()?;
Ok(unifier.add_ty(TypeEnum::TTuple { ty: tys }))

4
nac3core/src/typecheck/typedef/mod.rs
View File

@ -520,7 +520,7 @@ impl Unifier {
match (&*ty_a, &*ty_b) {
(
TVar { fields: fields1, id, name: name1, loc: loc1, .. },
TVar { fields: fields2, name: name2, loc: loc2, .. },
TVar { fields: fields2, id: id2, name: name2, loc: loc2, .. },
) => {
let new_fields = match (fields1, fields2) {
(None, None) => None,
@ -570,7 +570,7 @@ impl Unifier {
self.unification_table.set_value(
a,
Rc::new(TypeEnum::TVar {
id: *id,
id: name1.map_or(*id2, |_| *id),
fields: new_fields,
range,
name: name1.or(*name2),

2
nac3standalone/src/main.rs
View File

@ -85,7 +85,7 @@ fn main() {
Default::default(),
)?;
get_type_from_type_annotation_kinds(
def_list, unifier, primitives, &ty,
def_list, unifier, primitives, &ty, &mut None
)
})
.collect::<Result<Vec<_>, _>>()?;