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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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10
crates/compiler/solve/src/solve.rs
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@ -2601,17 +2601,17 @@ fn type_to_variable<'a>(
let copy_var = match opt_abilities {
None => helper!(typ),
Some(abilities) => {
// TODO(abilities)
let ability = abilities[0];
// If this type argument is marked as being bound to an ability, we must
// now correctly instantiate it as so.
match RegisterVariable::from_type(subs, rank, pools, arena, typ) {
RegisterVariable::Direct(var) => {
use Content::*;
match *subs.get_content_without_compacting(var) {
FlexVar(opt_name) => subs
.set_content(var, FlexAbleVar(opt_name, ability)),
FlexVar(opt_name) => {
// TODO(multi-abilities): check run cache
let abilities_slice = SubsSlice::extend_new(&mut subs.symbol_names, abilities.iter().copied());
subs.set_content(var, FlexAbleVar(opt_name, abilities_slice))
},
RigidVar(..) => internal_error!("Rigid var in type arg for {:?} - this is a bug in the solver, or our understanding", actual),
RigidAbleVar(..) | FlexAbleVar(..) => internal_error!("Able var in type arg for {:?} - this is a bug in the solver, or our understanding", actual),
_ => {