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Make select_* methods return Vec for TraitEngine

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Deadbeef 2021-11-08 23:35:23 +08:00
parent b3074819f6
commit f1126f1272
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25 changed files with 147 additions and 117 deletions
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5
compiler/rustc_trait_selection/src/autoderef.rs
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@ -152,11 +152,12 @@ impl<'a, 'tcx> Autoderef<'a, 'tcx> {
},
cause,
);
if let Err(e) = fulfillcx.select_where_possible(&self.infcx) {
let errors = fulfillcx.select_where_possible(&self.infcx);
if !errors.is_empty() {
// This shouldn't happen, except for evaluate/fulfill mismatches,
// but that's not a reason for an ICE (`predicate_may_hold` is conservative
// by design).
debug!("overloaded_deref_ty: encountered errors {:?} while fulfilling", e);
debug!("overloaded_deref_ty: encountered errors {:?} while fulfilling", errors);
return None;
}
let obligations = fulfillcx.pending_obligations();