bjoernager/rust
bjoernager/rust
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Revert "Auto merge of #91491 - spastorino:revert-91354, r=oli-obk"

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This reverts commit ff2439b7b9, reversing
changes made to 2a9e0831d6.
This commit is contained in:
Deadbeef 2021-12-12 12:34:46 +08:00
parent c5f8788d8d
commit 84b1d859c8
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GPG key ID: 6D017A96D8E6C2F9
49 changed files with 400 additions and 424 deletions
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16
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
View file

@ -13,7 +13,7 @@ use rustc_infer::infer::InferOk;
use rustc_infer::infer::LateBoundRegionConversionTime::HigherRankedType;
use rustc_middle::ty::subst::{GenericArg, GenericArgKind, Subst, SubstsRef};
use rustc_middle::ty::{self, Ty};
use rustc_middle::ty::{ToPolyTraitRef, ToPredicate, WithConstness};
use rustc_middle::ty::{ToPolyTraitRef, ToPredicate};
use rustc_span::def_id::DefId;
use crate::traits::project::{normalize_with_depth, normalize_with_depth_to};
@ -58,8 +58,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
}
ParamCandidate(param) => {
let obligations = self.confirm_param_candidate(obligation, param.0.value);
Ok(ImplSource::Param(obligations, param.0.constness))
let obligations =
self.confirm_param_candidate(obligation, param.map_bound(|t| t.trait_ref));
Ok(ImplSource::Param(obligations, param.skip_binder().constness))
}
ImplCandidate(impl_def_id) => {
@ -139,7 +140,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let trait_predicate = self.infcx.shallow_resolve(obligation.predicate);
let placeholder_trait_predicate =
self.infcx().replace_bound_vars_with_placeholders(trait_predicate);
self.infcx().replace_bound_vars_with_placeholders(trait_predicate).trait_ref;
let placeholder_self_ty = placeholder_trait_predicate.self_ty();
let placeholder_trait_predicate = ty::Binder::dummy(placeholder_trait_predicate);
let (def_id, substs) = match *placeholder_self_ty.kind() {
@ -150,8 +151,9 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let candidate_predicate = tcx.item_bounds(def_id)[idx].subst(tcx, substs);
let candidate = candidate_predicate
.to_opt_poly_trait_ref()
.expect("projection candidate is not a trait predicate");
.to_opt_poly_trait_pred()
.expect("projection candidate is not a trait predicate")
.map_bound(|t| t.trait_ref);
let mut obligations = Vec::new();
let candidate = normalize_with_depth_to(
self,
@ -165,7 +167,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
obligations.extend(self.infcx.commit_if_ok(|_| {
self.infcx
.at(&obligation.cause, obligation.param_env)
.sup(placeholder_trait_predicate.to_poly_trait_ref(), candidate.value)
.sup(placeholder_trait_predicate, candidate)
.map(|InferOk { obligations, .. }| obligations)
.map_err(|_| Unimplemented)
})?);