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Wrap unification subs in Env

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Ayaz Hafiz 2022-07-25 17:36:46 -04:00
parent 0989b2cb82
commit c0e976f544
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8 changed files with 375 additions and 356 deletions
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15
crates/compiler/solve/src/ability.rs
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@ -7,7 +7,7 @@ use roc_region::all::{Loc, Region};
use roc_solve_problem::{TypeError, UnderivableReason, Unfulfilled};
use roc_types::subs::{instantiate_rigids, Content, FlatType, GetSubsSlice, Rank, Subs, Variable};
use roc_types::types::{AliasKind, Category, PatternCategory};
use roc_unify::unify::MustImplementConstraints;
use roc_unify::unify::{Env, MustImplementConstraints};
use roc_unify::unify::{MustImplementAbility, Obligated};
use crate::solve::type_to_var;
@ -573,10 +573,15 @@ pub fn resolve_ability_specialization(
let signature_var = member_def.signature_var();
instantiate_rigids(subs, signature_var);
let (_vars, must_implement_ability, _lambda_sets_to_specialize, _meta) =
unify(subs, specialization_var, signature_var, Mode::EQ).expect_success(
"If resolving a specialization, the specialization must be known to typecheck.",
);
let (_vars, must_implement_ability, _lambda_sets_to_specialize, _meta) = unify(
&mut Env::new(subs),
specialization_var,
signature_var,
Mode::EQ,
)
.expect_success(
"If resolving a specialization, the specialization must be known to typecheck.",
);
subs.rollback_to(snapshot);