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more basic infra

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This commit is contained in:
Folkert 2021-08-03 22:59:24 +02:00
parent e1fc9322d9
commit ad12e1e509
1 changed files with 22 additions and 5 deletions
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27
compiler/types/src/subs.rs
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@ -13,6 +13,7 @@ use ven_ena::unify::{InPlace, Snapshot, UnificationTable, UnifyKey};
static_assertions::assert_eq_size!([u8; 104], Descriptor);
static_assertions::assert_eq_size!([u8; 88], Content);
static_assertions::assert_eq_size!([u8; 80], FlatType);
static_assertions::assert_eq_size!([u8; 48], Problem);
#[derive(Clone, Copy, Hash, PartialEq, Eq)]
pub struct Mark(i32);
@ -52,9 +53,10 @@ struct ErrorTypeState {
#[derive(Default, Clone)]
pub struct Subs {
utable: UnificationTable<InPlace<Variable>>,
// variables: Vec<Variable>,
// tag_names: Vec<TagName>,
// field_names: Vec<Lowercase>,
variables: Vec<Variable>,
tag_names: Vec<TagName>,
field_names: Vec<Lowercase>,
record_fields: Vec<RecordField<()>>,
}
#[repr(packed(2))]
@ -86,8 +88,22 @@ impl<T> Default for SubsSlice<T> {
}
}
pub trait GetSubsSlice<T> {
fn get_subs_slice(subs: &Subs, subs_slice: SubsSlice<T>) -> &[T];
impl<T> SubsSlice<T> {
pub fn get_slice<'a>(&self, slice: &'a [T]) -> &'a [T] {
&slice[..self.start as usize][..self.length as usize]
}
}
pub trait GetSubsSlice {
fn get_subs_slice(subs: &Subs, subs_slice: SubsSlice<Self>) -> &[Self]
where
Self: Sized;
}
impl GetSubsSlice for Variable {
fn get_subs_slice(subs: &Subs, subs_slice: SubsSlice<Self>) -> &[Self] {
subs_slice.get_slice(&subs.variables)
}
}
impl fmt::Debug for Subs {
@ -299,6 +315,7 @@ impl Subs {
let mut subs = Subs {
utable: UnificationTable::default(),
..Default::default()
};
// NOTE the utable does not (currently) have a with_capacity; using this as the next-best thing