language-servers/roc
1
0
Fork 0
mirror of https://github.com/roc-lang/roc.git synced 2025-10-03 08:34:33 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

Deal with equivalence in the presence of unresolved recursive pointers

Browse source
This commit is contained in:
Ayaz Hafiz 2022-09-12 12:39:47 -04:00
parent 9eb1c170f3
commit 564d9f795a
No known key found for this signature in database
GPG key ID: 0E2A37416A25EF58
1 changed files with 68 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

87
crates/glue/src/types.rs
View file

@ -65,24 +65,45 @@ impl Types {
}
pub fn is_equivalent(&self, a: &RocType, b: &RocType) -> bool {
self.is_equivalent_help(RocTypeOrPending::Type(a), RocTypeOrPending::Type(b))
}
fn is_equivalent_help(&self, a: RocTypeOrPending, b: RocTypeOrPending) -> bool {
use RocType::*;
let (a, b) = match (a, b) {
(RocTypeOrPending::Type(a), RocTypeOrPending::Type(b)) => (a, b),
(RocTypeOrPending::Pending, RocTypeOrPending::Pending) => return true,
_ => return false,
};
match (a, b) {
(RocStr, RocStr) | (Bool, Bool) | (EmptyTagUnion, EmptyTagUnion) | (Unit, Unit) => true,
(RocResult(ok_a, err_a), RocResult(ok_b, err_b)) => {
self.is_equivalent(self.get_type(*ok_a), self.get_type(*ok_b))
&& self.is_equivalent(self.get_type(*err_a), self.get_type(*err_b))
self.is_equivalent_help(
self.get_type_or_pending(*ok_a),
self.get_type_or_pending(*ok_b),
) && self.is_equivalent_help(
self.get_type_or_pending(*err_a),
self.get_type_or_pending(*err_b),
)
}
(Num(num_a), Num(num_b)) => num_a == num_b,
(RocList(elem_a), RocList(elem_b))
| (RocSet(elem_a), RocSet(elem_b))
| (RocBox(elem_a), RocBox(elem_b))
| (RecursivePointer(elem_a), RecursivePointer(elem_b)) => {
self.is_equivalent(self.get_type(*elem_a), self.get_type(*elem_b))
}
| (RecursivePointer(elem_a), RecursivePointer(elem_b)) => self.is_equivalent_help(
self.get_type_or_pending(*elem_a),
self.get_type_or_pending(*elem_b),
),
(RocDict(key_a, val_a), RocDict(key_b, val_b)) => {
self.is_equivalent(self.get_type(*key_a), self.get_type(*key_b))
&& self.is_equivalent(self.get_type(*val_a), self.get_type(*val_b))
self.is_equivalent_help(
self.get_type_or_pending(*key_a),
self.get_type_or_pending(*key_b),
) && self.is_equivalent_help(
self.get_type_or_pending(*val_a),
self.get_type_or_pending(*val_b),
)
}
(TagUnion(union_a), TagUnion(union_b)) => {
use RocTagUnion::*;
@ -113,8 +134,10 @@ impl Types {
},
) => {
tag_name_a == tag_name_b
&& self
.is_equivalent(self.get_type(*payload_a), self.get_type(*payload_b))
&& self.is_equivalent_help(
self.get_type_or_pending(*payload_a),
self.get_type_or_pending(*payload_b),
)
}
(Enumeration { tags: tags_a, .. }, Enumeration { tags: tags_b, .. }) => {
tags_a == tags_b
@ -157,9 +180,9 @@ impl Types {
|((name_a, opt_id_a), (name_b, opt_id_b))| {
name_a == name_b
&& match (opt_id_a, opt_id_b) {
(Some(id_a), Some(id_b)) => self.is_equivalent(
self.get_type(*id_a),
self.get_type(*id_b),
(Some(id_a), Some(id_b)) => self.is_equivalent_help(
self.get_type_or_pending(*id_a),
self.get_type_or_pending(*id_b),
),
(None, None) => true,
(None, Some(_)) | (Some(_), None) => false,
@ -179,9 +202,9 @@ impl Types {
|((name_a, opt_id_a), (name_b, opt_id_b))| {
name_a == name_b
&& match (opt_id_a, opt_id_b) {
(Some(id_a), Some(id_b)) => self.is_equivalent(
self.get_type(*id_a),
self.get_type(*id_b),
(Some(id_a), Some(id_b)) => self.is_equivalent_help(
self.get_type_or_pending(*id_a),
self.get_type_or_pending(*id_b),
),
(None, None) => true,
(None, Some(_)) | (Some(_), None) => false,
@ -241,7 +264,10 @@ impl Types {
.zip(fields_b.iter())
.all(|((name_a, id_a), (name_b, id_b))| {
name_a == name_b
&& self.is_equivalent(self.get_type(*id_a), self.get_type(*id_b))
&& self.is_equivalent_help(
self.get_type_or_pending(*id_a),
self.get_type_or_pending(*id_b),
)
})
} else {
false
@ -261,7 +287,10 @@ impl Types {
.zip(fields_b.iter())
.all(|((name_a, id_a), (name_b, id_b))| {
name_a == name_b
&& self.is_equivalent(self.get_type(*id_a), self.get_type(*id_b))
&& self.is_equivalent_help(
self.get_type_or_pending(*id_a),
self.get_type_or_pending(*id_b),
)
})
} else {
false
@ -283,10 +312,16 @@ impl Types {
// with the same type could have completely different implementations!
if name_a == name_b
&& args_a.len() == args_b.len()
&& self.is_equivalent(self.get_type(*ret_a), self.get_type(*ret_b))
&& self.is_equivalent_help(
self.get_type_or_pending(*ret_a),
self.get_type_or_pending(*ret_b),
)
{
args_a.iter().zip(args_b.iter()).all(|(id_a, id_b)| {
self.is_equivalent(self.get_type(*id_a), self.get_type(*id_b))
self.is_equivalent_help(
self.get_type_or_pending(*id_a),
self.get_type_or_pending(*id_b),
)
})
} else {
false
@ -389,6 +424,14 @@ impl Types {
}
}
fn get_type_or_pending(&self, id: TypeId) -> RocTypeOrPending {
match self.types.get(id.0) {
Some(typ) => RocTypeOrPending::Type(typ),
None if id == TypeId::PENDING => RocTypeOrPending::Pending,
None => unreachable!("{:?}", id),
}
}
/// Contrast this with the size_ignoring_alignment method
pub fn size_rounded_to_alignment(&self, id: TypeId) -> u32 {
let size_ignoring_alignment = self.size_ignoring_alignment(id);
@ -448,6 +491,12 @@ impl Types {
}
}
enum RocTypeOrPending<'a> {
Type(&'a RocType),
/// A pending recursive pointer
Pending,
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum RocType {
RocStr,