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Deduplicate some code

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This commit is contained in:
Matthew Jasper 2020-10-05 17:19:24 +01:00
parent 022c148fcd
commit c9eeb60b63
1 changed files with 15 additions and 24 deletions
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39
compiler/rustc_traits/src/chalk/db.rs
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@ -50,6 +50,19 @@ impl<'tcx> RustIrDatabase<'tcx> {
.map(|wc| wc.fold_with(&mut regions_substitutor))
.filter_map(|wc| LowerInto::<Option<chalk_ir::QuantifiedWhereClause<RustInterner<'tcx>>>>::lower_into(wc, &self.interner)).collect()
}
fn bounds_for<T>(&self, def_id: DefId, bound_vars: SubstsRef<'tcx>) -> Vec<T>
where
ty::Predicate<'tcx>: LowerInto<'tcx, std::option::Option<T>>,
{
self.interner
.tcx
.explicit_item_bounds(def_id)
.iter()
.map(|(bound, _)| bound.subst(self.interner.tcx, &bound_vars))
.filter_map(|bound| LowerInto::<Option<_>>::lower_into(bound, &self.interner))
.collect()
}
}
impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'tcx> {
@ -75,19 +88,7 @@ impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'t
let binders = binders_for(&self.interner, bound_vars);
let where_clauses = self.where_clauses_for(def_id, bound_vars);
let bounds = self
.interner
.tcx
.explicit_item_bounds(def_id)
.iter()
.map(|(bound, _)| bound.subst(self.interner.tcx, &bound_vars))
.filter_map(|bound| {
LowerInto::<
Option<chalk_solve::rust_ir::QuantifiedInlineBound<RustInterner<'tcx>>>,
>::lower_into(bound, &self.interner)
})
.collect();
let bounds = self.bounds_for(def_id, bound_vars);
Arc::new(chalk_solve::rust_ir::AssociatedTyDatum {
trait_id: chalk_ir::TraitId(trait_def_id),
@ -453,17 +454,7 @@ impl<'tcx> chalk_solve::RustIrDatabase<RustInterner<'tcx>> for RustIrDatabase<'t
let bound_vars = bound_vars_for_item(self.interner.tcx, opaque_ty_id.0);
let binders = binders_for(&self.interner, bound_vars);
let where_clauses = self.where_clauses_for(opaque_ty_id.0, bound_vars);
let bounds: Vec<_> = self
.interner
.tcx
.explicit_item_bounds(opaque_ty_id.0)
.iter()
.map(|(bound, _)| bound.subst(self.interner.tcx, &bound_vars))
.filter_map(|bound| {
LowerInto::<Option<chalk_ir::QuantifiedWhereClause<RustInterner<'tcx>>>>::lower_into(bound, &self.interner)
})
.collect();
let bounds = self.bounds_for(opaque_ty_id.0, bound_vars);
let value = chalk_solve::rust_ir::OpaqueTyDatumBound {
bounds: chalk_ir::Binders::new(binders.clone(), bounds),