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Represent "able" variables with slices of abilities

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Ayaz Hafiz 2022-10-12 14:52:38 -05:00
parent 0f0678ce73
commit 229548571b
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10 changed files with 163 additions and 85 deletions
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9
crates/compiler/can/src/annotation.rs
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@ -105,7 +105,7 @@ impl OwnedNamedOrAble {
}
}
pub fn opt_abilities(&self) -> Option<&[Symbol]> {
pub fn opt_abilities(&self) -> Option<&VecSet<Symbol>> {
match self {
OwnedNamedOrAble::Named(_) => None,
OwnedNamedOrAble::Able(av) => Some(&av.abilities),
@ -127,6 +127,8 @@ pub struct NamedVariable {
pub struct AbleVariable {
pub variable: Variable,
pub name: Lowercase,
/// Abilities bound to this type variable.
/// INVARIANT: sorted and de-duplicated.
pub abilities: VecSet<Symbol>,
// NB: there may be multiple occurrences of a variable
pub first_seen: Region,
@ -984,6 +986,11 @@ fn canonicalize_has_clause(
let var = var_store.fresh();
let can_abilities = {
let mut vec = can_abilities.into_vec();
vec.sort();
VecSet::from_iter(vec)
};
introduced_variables.insert_able(var_name, Loc::at(region, var), can_abilities);
Ok(())