bjoernager/rust
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update docs for simplify_type

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This commit is contained in:
lcnr 2022-02-21 13:44:55 +01:00
parent 026d8ce7f5
commit 55f938b589
7 changed files with 66 additions and 60 deletions
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15
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -36,7 +36,7 @@ use rustc_infer::infer::LateBoundRegionConversionTime;
use rustc_middle::dep_graph::{DepKind, DepNodeIndex};
use rustc_middle::mir::interpret::ErrorHandled;
use rustc_middle::thir::abstract_const::NotConstEvaluatable;
use rustc_middle::ty::fast_reject::{self, SimplifyParams};
use rustc_middle::ty::fast_reject::{self, TreatParams};
use rustc_middle::ty::print::with_no_trimmed_paths;
use rustc_middle::ty::relate::TypeRelation;
use rustc_middle::ty::subst::{GenericArgKind, Subst, SubstsRef};
@ -2180,8 +2180,8 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
fn fast_reject_trait_refs(
&mut self,
obligation: &TraitObligation<'_>,
impl_trait_ref: &ty::TraitRef<'_>,
obligation: &TraitObligation<'tcx>,
impl_trait_ref: &ty::TraitRef<'tcx>,
) -> bool {
// We can avoid creating type variables and doing the full
// substitution if we find that any of the input types, when
@ -2197,10 +2197,13 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let simplified_obligation_ty = fast_reject::simplify_type(
self.tcx(),
obligation_ty,
SimplifyParams::Yes,
TreatParams::AsBoundTypes,
);
let simplified_impl_ty = fast_reject::simplify_type(
self.tcx(),
impl_ty,
TreatParams::AsPlaceholders,
);
let simplified_impl_ty =
fast_reject::simplify_type(self.tcx(), impl_ty, SimplifyParams::No);
simplified_obligation_ty.is_some()
&& simplified_impl_ty.is_some()