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Rename variant_var to tag_union_var

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Richard Feldman 2022-08-10 14:37:15 -04:00 • committed by Ayaz Hafiz
parent c81eecd644
commit 7e12bcff1d
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8 changed files with 53 additions and 33 deletions
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24
crates/compiler/types/src/subs.rs
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@ -2261,13 +2261,13 @@ pub struct LambdaSet {
///
/// ```text
/// XEffect : A -> B
///
///
/// after : ({} -> XEffect) -> XEffect
/// after =
/// \cont ->
/// f = \A -[`f (typeof cont)]-> when cont {} is A -> B
/// f
///
///
/// nestForever : {} -> XEffect
/// nestForever = \{} -[`nestForever]-> after nestForever
/// ^^^^^^^^^^^ {} -[`nestForever]-> A -[`f ({} -[`nestForever]-> A -[`f ...]-> B)]-> B
@ -2485,6 +2485,26 @@ pub trait Label: Sized + Clone {
pub type UnionTags = UnionLabels<TagName>;
pub type UnionLambdas = UnionLabels<Symbol>;
impl UnionTags {
pub fn for_result(subs: &mut Subs, ok_payload: Variable, err_payload: Variable) -> Self {
let ok_tuple = {
let variables_slice = VariableSubsSlice::reserve_into_subs(subs, 1);
VariableSubsSlice::insert_into_subs(subs, std::iter::once(ok_payload));
("Ok".into(), variables_slice)
};
let err_tuple = {
let variables_slice = VariableSubsSlice::reserve_into_subs(subs, 1);
VariableSubsSlice::insert_into_subs(subs, std::iter::once(err_payload));
("Err".into(), variables_slice)
};
UnionTags::insert_slices_into_subs(subs, [err_tuple, ok_tuple])
}
}
impl Label for TagName {
fn index_subs(subs: &Subs, idx: SubsIndex<Self>) -> &Self {
&subs[idx]