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fixed missing unification

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This commit is contained in:
pca006132 2021-07-26 14:20:09 +08:00
parent 0941de9ee1
commit bf31c48bba
2 changed files with 36 additions and 20 deletions
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45
nac3core/src/typecheck/typedef/mod.rs
View File

@ -204,7 +204,7 @@ impl Unifier {
}
for v1 in old_range2.iter() {
for v2 in range1.iter() {
if let Ok(result) = self.shape_match(*v1, *v2){
if let Ok(result) = self.get_intersection(*v1, *v2){
range2.push(result.unwrap_or(*v2));
}
}
@ -219,8 +219,9 @@ impl Unifier {
}
(TVar { meta: Generic, id, range, .. }, _) => {
self.occur_check(a, b)?;
self.check_var_compatible(*id, b, &range.borrow())?;
self.set_a_to_b(a, b);
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
self.set_a_to_b(a, x);
}
(TVar { meta: Sequence(map), id, range, .. }, TTuple { ty }) => {
self.occur_check(a, b)?;
@ -236,16 +237,18 @@ impl Unifier {
}
self.unify(*v, ty[ind as usize])?;
}
self.check_var_compatible(*id, b, &range.borrow())?;
self.set_a_to_b(a, b);
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
self.set_a_to_b(a, x);
}
(TVar { meta: Sequence(map), id, range, .. }, TList { ty }) => {
self.occur_check(a, b)?;
for v in map.borrow().values() {
self.unify(*v, *ty)?;
}
self.check_var_compatible(*id, b, &range.borrow())?;
self.set_a_to_b(a, b);
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
self.set_a_to_b(a, x);
}
(TTuple { ty: ty1 }, TTuple { ty: ty2 }) => {
if ty1.len() != ty2.len() {
@ -273,8 +276,9 @@ impl Unifier {
return Err(format!("No such attribute {}", k));
}
}
self.check_var_compatible(*id, b, &range.borrow())?;
self.set_a_to_b(a, b);
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
self.set_a_to_b(a, x);
}
(TVar { meta: Record(map), id, range, .. }, TVirtual { ty }) => {
self.occur_check(a, b)?;
@ -294,8 +298,9 @@ impl Unifier {
// require annotation...
return Err("Requires type annotation for virtual".to_string());
}
self.check_var_compatible(*id, b, &range.borrow())?;
self.set_a_to_b(a, b);
let x = self.check_var_compatibility(*id, b, &range.borrow())?.unwrap_or(b);
self.unify(x, b)?;
self.set_a_to_b(a, x);
}
(
TObj { obj_id: id1, params: params1, .. },
@ -647,7 +652,7 @@ impl Unifier {
Ok(())
}
fn shape_match(&mut self, a: Type, b: Type) -> Result<Option<Type>, ()> {
fn get_intersection(&mut self, a: Type, b: Type) -> Result<Option<Type>, ()> {
use TypeEnum::*;
let x = self.get_ty(a);
let y = self.get_ty(b);
@ -665,7 +670,7 @@ impl Unifier {
}
for v1 in range2.iter() {
for v2 in range1.iter() {
let result = self.shape_match(*v1, *v2);
let result = self.get_intersection(*v1, *v2);
if let Ok(result) = result {
range.push(result.unwrap_or(*v2));
}
@ -690,7 +695,7 @@ impl Unifier {
Ok(Some(a))
} else {
for v in range.iter() {
let result = self.shape_match(a, *v);
let result = self.get_intersection(a, *v);
if let Ok(result) = result {
return Ok(result.or(Some(a)));
}
@ -699,7 +704,7 @@ impl Unifier {
}
}
(TVar { id, range, .. }, _) => {
self.check_var_compatible(*id, b, &range.borrow()).or(Err(()))
self.check_var_compatibility(*id, b, &range.borrow()).or(Err(()))
}
(TTuple { ty: ty1 }, TTuple { ty: ty2 }) => {
if ty1.len() != ty2.len() {
@ -708,7 +713,7 @@ impl Unifier {
let mut need_new = false;
let mut ty = ty1.clone();
for (a, b) in zip(ty1.iter(), ty2.iter()) {
let result = self.shape_match(*a, *b)?;
let result = self.get_intersection(*a, *b)?;
ty.push(result.unwrap_or(*a));
if result.is_some() {
need_new = true;
@ -721,10 +726,10 @@ impl Unifier {
}
}
(TList { ty: ty1 }, TList { ty: ty2 }) => {
Ok(self.shape_match(*ty1, *ty2)?.map(|ty| self.add_ty(TList { ty })))
Ok(self.get_intersection(*ty1, *ty2)?.map(|ty| self.add_ty(TList { ty })))
}
(TVirtual { ty: ty1 }, TVirtual { ty: ty2 }) => {
Ok(self.shape_match(*ty1, *ty2)?.map(|ty| self.add_ty(TVirtual { ty })))
Ok(self.get_intersection(*ty1, *ty2)?.map(|ty| self.add_ty(TVirtual { ty })))
}
(TObj { obj_id: id1, .. }, TObj { obj_id: id2, .. }) => {
if id1 == id2 {
@ -738,7 +743,7 @@ impl Unifier {
}
}
fn check_var_compatible(
fn check_var_compatibility(
&mut self,
id: u32,
b: Type,
@ -748,7 +753,7 @@ impl Unifier {
return Ok(None);
}
for t in range.iter() {
let result = self.shape_match(*t, b);
let result = self.get_intersection(*t, b);
if let Ok(result) = result {
return Ok(result);
}

11
nac3core/src/typecheck/typedef/test.rs
View File

@ -439,4 +439,15 @@ fn test_typevar_range() {
env.unifier.unify(a_list, int_list),
Err("Cannot unify type variable 19 with TObj due to incompatible value range".into())
);
let a = env.unifier.get_fresh_var_with_range(&[int, float]).0;
let b = env.unifier.get_fresh_var().0;
let a_list = env.unifier.add_ty(TypeEnum::TList { ty: a});
let a_list = env.unifier.get_fresh_var_with_range(&[a_list]).0;
let b_list = env.unifier.add_ty(TypeEnum::TList { ty: b});
env.unifier.unify(a_list, b_list).unwrap();
assert_eq!(
env.unifier.unify(b, boolean),
Err("Cannot unify type variable 21 with TObj due to incompatible value range".into())
);
}