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nac3core: show outer type info in type error messages 

Reviewed-on: M-Labs/nac3#274
Co-authored-by: ychenfo <yc@m-labs.hk>
Co-committed-by: ychenfo <yc@m-labs.hk>
This commit is contained in:
ychenfo 2022-04-22 15:31:55 +08:00 committed by sb10q
parent 837aaa95f1
commit 48cb485b89
2 changed files with 22 additions and 9 deletions
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24
nac3core/src/typecheck/typedef/mod.rs
View File

@ -657,12 +657,16 @@ impl Unifier {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
}
for (x, y) in ty1.iter().zip(ty2.iter()) {
self.unify_impl(*x, *y, false)?;
if self.unify_impl(*x, *y, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
}
}
self.set_a_to_b(a, b);
}
(TList { ty: ty1 }, TList { ty: ty2 }) => {
self.unify_impl(*ty1, *ty2, false)?;
if self.unify_impl(*ty1, *ty2, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
}
self.set_a_to_b(a, b);
}
(TVar { fields: Some(map), range, .. }, TObj { fields, .. }) => {
@ -743,12 +747,16 @@ impl Unifier {
self.incompatible_types(a, b)?;
}
for (x, y) in zip(params1.values(), params2.values()) {
self.unify_impl(*x, *y, false)?;
if self.unify_impl(*x, *y, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
};
}
self.set_a_to_b(a, b);
}
(TVirtual { ty: ty1 }, TVirtual { ty: ty2 }) => {
self.unify_impl(*ty1, *ty2, false)?;
if self.unify_impl(*ty1, *ty2, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
};
self.set_a_to_b(a, b);
}
(TCall(calls1), TCall(calls2)) => {
@ -784,9 +792,13 @@ impl Unifier {
if x.name != y.name || x.default_value != y.default_value {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
}
self.unify_impl(x.ty, y.ty, false)?;
if self.unify_impl(x.ty, y.ty, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
};
}
self.unify_impl(sign1.ret, sign2.ret, false)?;
if self.unify_impl(sign1.ret, sign2.ret, false).is_err() {
return Err(TypeError::new(TypeErrorKind::IncompatibleTypes(a, b), None));
};
self.set_a_to_b(a, b);
}
(TVar { fields: Some(fields), .. }, _) => {

7
nac3core/src/typecheck/typedef/test.rs
View File

@ -286,7 +286,7 @@ fn test_unify(
("v1", "tuple[int]"),
("v2", "tuple[float]"),
],
(("v1", "v2"), "Incompatible types: 0 and 1")
(("v1", "v2"), "Incompatible types: tuple[0] and tuple[1]")
; "tuple parameter mismatch"
)]
#[test_case(2,
@ -478,7 +478,8 @@ fn test_typevar_range() {
let int_list = env.unifier.add_ty(TypeEnum::TList { ty: int });
assert_eq!(
env.unify(a_list, int_list),
Err("Expected any one of these types: 1, but got 0".into())
Err("Incompatible types: list[typevar22] and list[0]\
\n\nNotes:\n typevar22 ∈ {1}".into())
);
let a = env.unifier.get_fresh_var_with_range(&[int, float], None, None).0;
@ -506,7 +507,7 @@ fn test_rigid_var() {
assert_eq!(env.unify(a, b), Err("Incompatible types: typevar3 and typevar2".to_string()));
env.unifier.unify(list_a, list_x).unwrap();
assert_eq!(env.unify(list_x, list_int), Err("Incompatible types: 0 and typevar2".to_string()));
assert_eq!(env.unify(list_x, list_int), Err("Incompatible types: list[typevar2] and list[0]".to_string()));
env.unifier.replace_rigid_var(a, int);
env.unifier.unify(list_x, list_int).unwrap();