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nac3core: fixed typevar bug

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This commit is contained in:
pca006132 2022-03-18 01:07:44 +08:00
parent 93af337ed3
commit 35ac5cb6f6
5 changed files with 42 additions and 37 deletions
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22
nac3artiq/src/symbol_resolver.rs
View File

@ -503,7 +503,7 @@ impl InnerResolver {
Ok(s) => s,
Err(e) => return Ok(Err(e)),
};
return match (&*unifier.get_ty(extracted_ty), inst_check) {
match (&*unifier.get_ty(extracted_ty), inst_check) {
// do the instantiation for these three types
(TypeEnum::TList { ty }, false) => {
let len: usize = self.helper.len_fn.call1(py, (obj,))?.extract(py)?;
@ -538,22 +538,9 @@ impl InnerResolver {
let types = types?;
Ok(types.map(|types| unifier.add_ty(TypeEnum::TTuple { ty: types })))
}
(TypeEnum::TObj { params, fields, .. }, false) => {
(TypeEnum::TObj { params: var_map, fields, .. }, false) => {
self.pyid_to_type.write().insert(ty_id, extracted_ty);
let mut instantiate_obj = || {
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<_, _>>();
// loop through non-function fields of the class to get the instantiated value
for field in fields.iter() {
let name: String = (*field.0).into();
@ -590,7 +577,7 @@ impl InnerResolver {
return Ok(Err("object is not of concrete type".into()));
}
}
Ok(Ok(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
@ -600,7 +587,7 @@ impl InnerResolver {
result
}
_ => Ok(Ok(extracted_ty)),
};
}
}
fn get_obj_value<'ctx, 'a>(
@ -919,6 +906,7 @@ impl SymbolResolver for Resolver {
})
.unwrap(),
};
println!("{:?}", result);
if let Ok(t) = &result {
self.0.id_to_type.write().insert(str, *t);
}

4
nac3core/src/symbol_resolver.rs
View File

@ -229,10 +229,10 @@ pub fn parse_type_annotation<T>(
Err(format!("Cannot use function name as type at {}", loc))
}
}
Err(e) => {
Err(_) => {
let ty = resolver
.get_symbol_type(unifier, top_level_defs, primitives, *id)
.map_err(|_| format!("Unknown type annotation at {}: {}", loc, e))?;
.map_err(|e| format!("Unknown type annotation at {}: {}", loc, e))?;
if let TypeEnum::TVar { .. } = &*unifier.get_ty(ty) {
Ok(ty)
} else {

45
nac3core/src/toplevel/composer.rs
View File

@ -1,4 +1,5 @@
use nac3parser::ast::fold::Fold;
use std::rc::Rc;
use crate::{
codegen::{expr::get_subst_key, stmt::exn_constructor},
@ -1192,18 +1193,9 @@ impl TopLevelComposer {
unreachable!("must be type var annotation");
}
}
let dummy_return_type = unifier.get_dummy_var().0;
type_var_to_concrete_def.insert(dummy_return_type, annotation.clone());
dummy_return_type
get_type_from_type_annotation_kinds(temp_def_list, unifier, primitives, &annotation)?
} else {
// if do not have return annotation, return none
// for uniform handling, still use type annoatation
let dummy_return_type = unifier.get_dummy_var().0;
type_var_to_concrete_def.insert(
dummy_return_type,
TypeAnnotation::Primitive(primitives.none),
);
dummy_return_type
primitives.none
}
};
@ -1449,6 +1441,34 @@ impl TopLevelComposer {
let primitives_ty = &self.primitives_ty;
let definition_ast_list = &self.definition_ast_list;
let unifier = &mut self.unifier;
// first, fix function typevar ids
// they may be changed with our use of placeholders
for (def, _) in definition_ast_list.iter().skip(self.builtin_num) {
if let TopLevelDef::Function {
signature,
var_id,
..
} = &mut *def.write() {
if let TypeEnum::TFunc(FunSignature { args, ret, vars }) =
unifier.get_ty(*signature).as_ref() {
let new_var_ids = vars.values().map(|v| match &*unifier.get_ty(*v) {
TypeEnum::TVar{id, ..} => *id,
_ => unreachable!(),
}).collect_vec();
if new_var_ids != *var_id {
let new_signature = FunSignature {
args: args.clone(),
ret: ret.clone(),
vars: new_var_ids.iter().zip(vars.values()).map(|(id, v)| (*id, v.clone())).collect(),
};
unifier.unification_table.set_value(*signature, Rc::new(TypeEnum::TFunc(new_signature)));
*var_id = new_var_ids;
}
}
}
}
let mut errors = HashSet::new();
let mut analyze = |i, def: &Arc<RwLock<TopLevelDef>>, ast: &Option<Stmt>| {
let class_def = def.read();
@ -1650,7 +1670,6 @@ impl TopLevelComposer {
// if class methods, `vars` also contains all class typevars here
let (type_var_subst_comb, no_range_vars) = {
let mut no_ranges: Vec<Type> = Vec::new();
let var_ids = vars.keys().copied().collect_vec();
let var_combs = vars
.iter()
.map(|(_, ty)| {
@ -1669,7 +1688,7 @@ impl TopLevelComposer {
.collect_vec();
let mut result: Vec<HashMap<u32, Type>> = Default::default();
for comb in var_combs {
result.push(var_ids.clone().into_iter().zip(comb).collect());
result.push(insted_vars.clone().into_iter().zip(comb).collect());
}
// NOTE: if is empty, means no type var, append a empty subst, ok to do this?
if result.is_empty() {

2
nac3core/src/toplevel/type_annotation.rs
View File

@ -105,8 +105,6 @@ pub fn parse_ast_to_type_annotation_kinds<T>(
Ok(TypeAnnotation::CustomClass { id: obj_id, params: vec![] })
} else if let Ok(ty) = resolver.get_symbol_type(unifier, top_level_defs, primitives, *id) {
if let TypeEnum::TVar { .. } = unifier.get_ty(ty).as_ref() {
let var = unifier.get_fresh_var(Some(*id), Some(expr.location)).0;
unifier.unify(var, ty).unwrap();
Ok(TypeAnnotation::TypeVar(ty))
} else {
Err(format!("`{}` is not a valid type annotation (at {})", id, expr.location))

6
nac3core/src/typecheck/typedef/mod.rs
View File

@ -156,9 +156,9 @@ pub type SharedUnifier = Arc<Mutex<(UnificationTable<TypeEnum>, u32, Vec<Call>)>
#[derive(Clone)]
pub struct Unifier {
pub top_level: Option<Arc<TopLevelContext>>,
unification_table: UnificationTable<Rc<TypeEnum>>,
pub(super) calls: Vec<Rc<Call>>,
pub(crate) top_level: Option<Arc<TopLevelContext>>,
pub(crate) unification_table: UnificationTable<Rc<TypeEnum>>,
pub(crate) calls: Vec<Rc<Call>>,
var_id: u32,
unify_cache: HashSet<(Type, Type)>,
snapshot: Option<(usize, u32)>