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rustdoc: heavily simplify the synthesis of auto trait impls #123340

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Merged
bors merged 2 commits into from
Apr 2, 2024
Merged

rustdoc: heavily simplify the synthesis of auto trait impls #123340

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cbd593e
rustdoc: synthetic impls: auto traits: Fx{Hash↦Index}{Map,Set}
fmease Apr 1, 2024
069e7f2
rustdoc: heavily simplify synthesis of auto trait impls
fmease Mar 31, 2024
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rustdoc: heavily simplify synthesis of auto trait impls
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@fmease
fmease committed Apr 1, 2024
commit 069e7f2a768874536e8688e3df120cd74cd03b0b
15 changes: 4 additions & 11 deletions compiler/rustc_trait_selection/src/traits/auto_trait.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,8 @@ pub enum RegionTarget<'tcx> {

#[derive(Default, Debug, Clone)]
pub struct RegionDeps<'tcx> {
larger: FxIndexSet<RegionTarget<'tcx>>,
smaller: FxIndexSet<RegionTarget<'tcx>>,
pub larger: FxIndexSet<RegionTarget<'tcx>>,
pub smaller: FxIndexSet<RegionTarget<'tcx>>,
}

pub enum AutoTraitResult<A> {
Expand Down Expand Up @@ -81,19 +81,12 @@ impl<'tcx> AutoTraitFinder<'tcx> {

let infcx = tcx.infer_ctxt().build();
let mut selcx = SelectionContext::new(&infcx);
for polarity in [true, false] {
for polarity in [ty::PredicatePolarity::Positive, ty::PredicatePolarity::Negative] {
let result = selcx.select(&Obligation::new(
tcx,
ObligationCause::dummy(),
orig_env,
ty::TraitPredicate {
trait_ref,
polarity: if polarity {
ty::PredicatePolarity::Positive
} else {
ty::PredicatePolarity::Negative
},
},
ty::TraitPredicate { trait_ref, polarity },
));
if let Ok(Some(ImplSource::UserDefined(_))) = result {
debug!(
Expand Down
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