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Rollup merge of #107780 - compiler-errors:instantiate-binder, r=lcnr

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Rename `replace_bound_vars_with_*` to `instantiate_binder_with_*`

Mentioning "binder" rather than "bound vars", imo, makes it clearer that we're doing something to the binder as a whole.

Also, "instantiate" is the verb that I'm always reaching for when I'm looking for these functions, and the name that we use in the new solver anyways.

r? types
This commit is contained in:
Matthias Krüger 2023-02-08 18:32:44 +01:00 • committed by GitHub
commit ec65285fdd
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GPG key ID: 4AEE18F83AFDEB23
28 changed files with 67 additions and 60 deletions
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2
compiler/rustc_borrowck/src/diagnostics/mod.rs
View file

@ -1139,7 +1139,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
if let ty::Adt(def, substs) = ty.kind()
&& Some(def.did()) == tcx.lang_items().pin_type()
&& let ty::Ref(_, _, hir::Mutability::Mut) = substs.type_at(0).kind()
&& let self_ty = infcx.replace_bound_vars_with_fresh_vars(
&& let self_ty = infcx.instantiate_binder_with_fresh_vars(
fn_call_span,
LateBoundRegionConversionTime::FnCall,
tcx.fn_sig(method_did).subst(tcx, method_substs).input(0),

2
compiler/rustc_borrowck/src/type_check/input_output.rs
View file

@ -38,7 +38,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
// so that they represent the view from "inside" the closure.
let user_provided_sig = self
.instantiate_canonical_with_fresh_inference_vars(body.span, &user_provided_poly_sig);
let user_provided_sig = self.infcx.replace_bound_vars_with_fresh_vars(
let user_provided_sig = self.infcx.instantiate_binder_with_fresh_vars(
body.span,
LateBoundRegionConversionTime::FnCall,
user_provided_sig,

4
compiler/rustc_hir_analysis/src/check/compare_impl_item.rs
View file

@ -246,7 +246,7 @@ fn compare_method_predicate_entailment<'tcx>(
let mut wf_tys = FxIndexSet::default();
let unnormalized_impl_sig = infcx.replace_bound_vars_with_fresh_vars(
let unnormalized_impl_sig = infcx.instantiate_binder_with_fresh_vars(
impl_m_span,
infer::HigherRankedType,
tcx.fn_sig(impl_m.def_id).subst_identity(),
@ -640,7 +640,7 @@ pub(super) fn collect_return_position_impl_trait_in_trait_tys<'tcx>(
let impl_sig = ocx.normalize(
&norm_cause,
param_env,
infcx.replace_bound_vars_with_fresh_vars(
infcx.instantiate_binder_with_fresh_vars(
return_span,
infer::HigherRankedType,
tcx.fn_sig(impl_m.def_id).subst_identity(),

4
compiler/rustc_hir_typeck/src/callee.rs
View file

@ -156,7 +156,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// fnmut vs fnonce. If so, we have to defer further processing.
if self.closure_kind(substs).is_none() {
let closure_sig = substs.as_closure().sig();
let closure_sig = self.replace_bound_vars_with_fresh_vars(
let closure_sig = self.instantiate_binder_with_fresh_vars(
call_expr.span,
infer::FnCall,
closure_sig,
@ -437,7 +437,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// renormalize the associated types at this point, since they
// previously appeared within a `Binder<>` and hence would not
// have been normalized before.
let fn_sig = self.replace_bound_vars_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
let fn_sig = self.instantiate_binder_with_fresh_vars(call_expr.span, infer::FnCall, fn_sig);
let fn_sig = self.normalize(call_expr.span, fn_sig);
// Call the generic checker.

4
compiler/rustc_hir_typeck/src/closure.rs
View file

@ -544,7 +544,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
)
.map(|(hir_ty, &supplied_ty)| {
// Instantiate (this part of..) S to S', i.e., with fresh variables.
self.replace_bound_vars_with_fresh_vars(
self.instantiate_binder_with_fresh_vars(
hir_ty.span,
LateBoundRegionConversionTime::FnCall,
// (*) binder moved to here
@ -566,7 +566,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
all_obligations.extend(obligations);
}
let supplied_output_ty = self.replace_bound_vars_with_fresh_vars(
let supplied_output_ty = self.instantiate_binder_with_fresh_vars(
decl.output.span(),
LateBoundRegionConversionTime::FnCall,
supplied_sig.output(),

4
compiler/rustc_hir_typeck/src/expr.rs
View file

@ -568,7 +568,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// placeholder lifetimes with probing, we just replace higher lifetimes
// with fresh vars.
let span = args.get(i).map(|a| a.span).unwrap_or(expr.span);
let input = self.replace_bound_vars_with_fresh_vars(
let input = self.instantiate_binder_with_fresh_vars(
span,
infer::LateBoundRegionConversionTime::FnCall,
fn_sig.input(i),
@ -586,7 +586,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// Also, as we just want to check sizedness, instead of introducing
// placeholder lifetimes with probing, we just replace higher lifetimes
// with fresh vars.
let output = self.replace_bound_vars_with_fresh_vars(
let output = self.instantiate_binder_with_fresh_vars(
expr.span,
infer::LateBoundRegionConversionTime::FnCall,
fn_sig.output(),

2
compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
View file

@ -289,7 +289,7 @@ impl<'a, 'tcx> AstConv<'tcx> for FnCtxt<'a, 'tcx> {
item_segment: &hir::PathSegment<'_>,
poly_trait_ref: ty::PolyTraitRef<'tcx>,
) -> Ty<'tcx> {
let trait_ref = self.replace_bound_vars_with_fresh_vars(
let trait_ref = self.instantiate_binder_with_fresh_vars(
span,
infer::LateBoundRegionConversionTime::AssocTypeProjection(item_def_id),
poly_trait_ref,

10
compiler/rustc_hir_typeck/src/method/confirm.rs
View file

@ -262,7 +262,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
let original_poly_trait_ref = principal.with_self_ty(this.tcx, object_ty);
let upcast_poly_trait_ref = this.upcast(original_poly_trait_ref, trait_def_id);
let upcast_trait_ref =
this.replace_bound_vars_with_fresh_vars(upcast_poly_trait_ref);
this.instantiate_binder_with_fresh_vars(upcast_poly_trait_ref);
debug!(
"original_poly_trait_ref={:?} upcast_trait_ref={:?} target_trait={:?}",
original_poly_trait_ref, upcast_trait_ref, trait_def_id
@ -285,7 +285,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
probe::WhereClausePick(poly_trait_ref) => {
// Where clauses can have bound regions in them. We need to instantiate
// those to convert from a poly-trait-ref to a trait-ref.
self.replace_bound_vars_with_fresh_vars(poly_trait_ref).substs
self.instantiate_binder_with_fresh_vars(poly_trait_ref).substs
}
}
}
@ -506,7 +506,7 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
let sig = self.tcx.fn_sig(def_id).subst(self.tcx, all_substs);
debug!("type scheme substituted, sig={:?}", sig);
let sig = self.replace_bound_vars_with_fresh_vars(sig);
let sig = self.instantiate_binder_with_fresh_vars(sig);
debug!("late-bound lifetimes from method instantiated, sig={:?}", sig);
(sig, method_predicates)
@ -625,10 +625,10 @@ impl<'a, 'tcx> ConfirmContext<'a, 'tcx> {
upcast_trait_refs.into_iter().next().unwrap()
}
fn replace_bound_vars_with_fresh_vars<T>(&self, value: ty::Binder<'tcx, T>) -> T
fn instantiate_binder_with_fresh_vars<T>(&self, value: ty::Binder<'tcx, T>) -> T
where
T: TypeFoldable<'tcx> + Copy,
{
self.fcx.replace_bound_vars_with_fresh_vars(self.span, infer::FnCall, value)
self.fcx.instantiate_binder_with_fresh_vars(self.span, infer::FnCall, value)
}
}

2
compiler/rustc_hir_typeck/src/method/mod.rs
View file

@ -401,7 +401,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
// with bound regions.
let fn_sig = tcx.fn_sig(def_id).subst(self.tcx, substs);
let fn_sig =
self.replace_bound_vars_with_fresh_vars(obligation.cause.span, infer::FnCall, fn_sig);
self.instantiate_binder_with_fresh_vars(obligation.cause.span, infer::FnCall, fn_sig);
let InferOk { value, obligations: o } =
self.at(&obligation.cause, self.param_env).normalize(fn_sig);

2
compiler/rustc_hir_typeck/src/method/probe.rs
View file

@ -924,7 +924,7 @@ impl<'a, 'tcx> ProbeContext<'a, 'tcx> {
ty::AssocKind::Fn => self.probe(|_| {
let substs = self.fresh_substs_for_item(self.span, method.def_id);
let fty = self.tcx.fn_sig(method.def_id).subst(self.tcx, substs);
let fty = self.replace_bound_vars_with_fresh_vars(self.span, infer::FnCall, fty);
let fty = self.instantiate_binder_with_fresh_vars(self.span, infer::FnCall, fty);
if let Some(self_ty) = self_ty {
if self

2
compiler/rustc_infer/src/infer/equate.rs
View file

@ -129,7 +129,7 @@ impl<'tcx> TypeRelation<'tcx> for Equate<'_, '_, 'tcx> {
let a_types = infcx.tcx.anonymize_bound_vars(a_types);
let b_types = infcx.tcx.anonymize_bound_vars(b_types);
if a_types.bound_vars() == b_types.bound_vars() {
let (a_types, b_types) = infcx.replace_bound_vars_with_placeholders(
let (a_types, b_types) = infcx.instantiate_binder_with_placeholders(
a_types.map_bound(|a_types| (a_types, b_types.skip_binder())),
);
for (a, b) in std::iter::zip(a_types, b_types) {

6
compiler/rustc_infer/src/infer/higher_ranked/mod.rs
View file

@ -38,13 +38,13 @@ impl<'a, 'tcx> CombineFields<'a, 'tcx> {
// First, we instantiate each bound region in the supertype with a
// fresh placeholder region. Note that this automatically creates
// a new universe if needed.
let sup_prime = self.infcx.replace_bound_vars_with_placeholders(sup);
let sup_prime = self.infcx.instantiate_binder_with_placeholders(sup);
// Next, we instantiate each bound region in the subtype
// with a fresh region variable. These region variables --
// but no other pre-existing region variables -- can name
// the placeholders.
let sub_prime = self.infcx.replace_bound_vars_with_fresh_vars(span, HigherRankedType, sub);
let sub_prime = self.infcx.instantiate_binder_with_fresh_vars(span, HigherRankedType, sub);
debug!("a_prime={:?}", sub_prime);
debug!("b_prime={:?}", sup_prime);
@ -70,7 +70,7 @@ impl<'tcx> InferCtxt<'tcx> {
///
/// [rustc dev guide]: https://rustc-dev-guide.rust-lang.org/traits/hrtb.html
#[instrument(level = "debug", skip(self), ret)]
pub fn replace_bound_vars_with_placeholders<T>(&self, binder: ty::Binder<'tcx, T>) -> T
pub fn instantiate_binder_with_placeholders<T>(&self, binder: ty::Binder<'tcx, T>) -> T
where
T: TypeFoldable<'tcx> + Copy,
{

13
compiler/rustc_infer/src/infer/mod.rs
View file

@ -995,7 +995,7 @@ impl<'tcx> InferCtxt<'tcx> {
Ok(self.commit_if_ok(|_snapshot| {
let ty::SubtypePredicate { a_is_expected, a, b } =
self.replace_bound_vars_with_placeholders(predicate);
self.instantiate_binder_with_placeholders(predicate);
let ok = self.at(cause, param_env).sub_exp(a_is_expected, a, b)?;
@ -1008,7 +1008,7 @@ impl<'tcx> InferCtxt<'tcx> {
cause: &traits::ObligationCause<'tcx>,
predicate: ty::PolyRegionOutlivesPredicate<'tcx>,
) {
let ty::OutlivesPredicate(r_a, r_b) = self.replace_bound_vars_with_placeholders(predicate);
let ty::OutlivesPredicate(r_a, r_b) = self.instantiate_binder_with_placeholders(predicate);
let origin =
SubregionOrigin::from_obligation_cause(cause, || RelateRegionParamBound(cause.span));
self.sub_regions(origin, r_b, r_a); // `b : a` ==> `a <= b`
@ -1447,7 +1447,14 @@ impl<'tcx> InferCtxt<'tcx> {
value
}
pub fn replace_bound_vars_with_fresh_vars<T>(
// Instantiates the bound variables in a given binder with fresh inference
// variables in the current universe.
//
// Use this method if you'd like to find some substitution of the binder's
// variables (e.g. during a method call). If there isn't a [`LateBoundRegionConversionTime`]
// that corresponds to your use case, consider whether or not you should
// use [`InferCtxt::instantiate_binder_with_placeholders`] instead.
pub fn instantiate_binder_with_fresh_vars<T>(
&self,
span: Span,
lbrct: LateBoundRegionConversionTime,

2
compiler/rustc_infer/src/infer/sub.rs
View file

@ -161,7 +161,7 @@ impl<'tcx> TypeRelation<'tcx> for Sub<'_, '_, 'tcx> {
let a_types = infcx.tcx.anonymize_bound_vars(a_types);
let b_types = infcx.tcx.anonymize_bound_vars(b_types);
if a_types.bound_vars() == b_types.bound_vars() {
let (a_types, b_types) = infcx.replace_bound_vars_with_placeholders(
let (a_types, b_types) = infcx.instantiate_binder_with_placeholders(
a_types.map_bound(|a_types| (a_types, b_types.skip_binder())),
);
for (a, b) in std::iter::zip(a_types, b_types) {

6
compiler/rustc_trait_selection/src/solve/fulfill.rs
View file

@ -74,7 +74,7 @@ impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx> {
)
}
ty::PredicateKind::Subtype(pred) => {
let (a, b) = infcx.replace_bound_vars_with_placeholders(
let (a, b) = infcx.instantiate_binder_with_placeholders(
goal.predicate.kind().rebind((pred.a, pred.b)),
);
let expected_found = ExpectedFound::new(true, a, b);
@ -84,7 +84,7 @@ impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx> {
)
}
ty::PredicateKind::Coerce(pred) => {
let (a, b) = infcx.replace_bound_vars_with_placeholders(
let (a, b) = infcx.instantiate_binder_with_placeholders(
goal.predicate.kind().rebind((pred.a, pred.b)),
);
let expected_found = ExpectedFound::new(false, a, b);
@ -94,7 +94,7 @@ impl<'tcx> TraitEngine<'tcx> for FulfillmentCtxt<'tcx> {
)
}
ty::PredicateKind::ConstEquate(a, b) => {
let (a, b) = infcx.replace_bound_vars_with_placeholders(
let (a, b) = infcx.instantiate_binder_with_placeholders(
goal.predicate.kind().rebind((a, b)),
);
let expected_found = ExpectedFound::new(true, a, b);

6
compiler/rustc_trait_selection/src/solve/infcx_ext.rs
View file

@ -26,7 +26,7 @@ pub(super) trait InferCtxtExt<'tcx> {
rhs: T,
) -> Result<Vec<Goal<'tcx, ty::Predicate<'tcx>>>, NoSolution>;
fn instantiate_bound_vars_with_infer<T: TypeFoldable<'tcx> + Copy>(
fn instantiate_binder_with_infer<T: TypeFoldable<'tcx> + Copy>(
&self,
value: ty::Binder<'tcx, T>,
) -> T;
@ -65,11 +65,11 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
})
}
fn instantiate_bound_vars_with_infer<T: TypeFoldable<'tcx> + Copy>(
fn instantiate_binder_with_infer<T: TypeFoldable<'tcx> + Copy>(
&self,
value: ty::Binder<'tcx, T>,
) -> T {
self.replace_bound_vars_with_fresh_vars(
self.instantiate_binder_with_fresh_vars(
DUMMY_SP,
LateBoundRegionConversionTime::HigherRankedType,
value,

2
compiler/rustc_trait_selection/src/solve/mod.rs
View file

@ -304,7 +304,7 @@ impl<'a, 'tcx> EvalCtxt<'a, 'tcx> {
}
}
} else {
let kind = self.infcx.replace_bound_vars_with_placeholders(kind);
let kind = self.infcx.instantiate_binder_with_placeholders(kind);
let goal = goal.with(self.tcx(), ty::Binder::dummy(kind));
let (_, certainty) = self.evaluate_goal(goal)?;
self.make_canonical_response(certainty)

2
compiler/rustc_trait_selection/src/solve/project_goals.rs
View file

@ -323,7 +323,7 @@ impl<'tcx> assembly::GoalKind<'tcx> for ProjectionPredicate<'tcx> {
{
ecx.infcx.probe(|_| {
let assumption_projection_pred =
ecx.infcx.instantiate_bound_vars_with_infer(poly_projection_pred);
ecx.infcx.instantiate_binder_with_infer(poly_projection_pred);
let nested_goals = ecx.infcx.eq(
goal.param_env,
goal.predicate.projection_ty,

2
compiler/rustc_trait_selection/src/solve/trait_goals.rs
View file

@ -72,7 +72,7 @@ impl<'tcx> assembly::GoalKind<'tcx> for TraitPredicate<'tcx> {
// FIXME: Constness and polarity
ecx.infcx.probe(|_| {
let assumption_trait_pred =
ecx.infcx.instantiate_bound_vars_with_infer(poly_trait_pred);
ecx.infcx.instantiate_binder_with_infer(poly_trait_pred);
let nested_goals = ecx.infcx.eq(
goal.param_env,
goal.predicate.trait_ref,

4
compiler/rustc_trait_selection/src/solve/trait_goals/structural_traits.rs
View file

@ -54,7 +54,7 @@ pub(super) fn instantiate_constituent_tys_for_auto_trait<'tcx>(
}
ty::GeneratorWitness(types) => {
Ok(infcx.replace_bound_vars_with_placeholders(types).to_vec())
Ok(infcx.instantiate_binder_with_placeholders(types).to_vec())
}
ty::GeneratorWitnessMIR(..) => todo!(),
@ -174,7 +174,7 @@ pub(super) fn instantiate_constituent_tys_for_copy_clone_trait<'tcx>(
}
ty::GeneratorWitness(types) => {
Ok(infcx.replace_bound_vars_with_placeholders(types).to_vec())
Ok(infcx.instantiate_binder_with_placeholders(types).to_vec())
}
ty::GeneratorWitnessMIR(..) => todo!(),

6
compiler/rustc_trait_selection/src/traits/error_reporting/ambiguity.rs
View file

@ -22,7 +22,7 @@ pub fn recompute_applicable_impls<'tcx>(
let impl_may_apply = |impl_def_id| {
let ocx = ObligationCtxt::new_in_snapshot(infcx);
let placeholder_obligation =
infcx.replace_bound_vars_with_placeholders(obligation.predicate);
infcx.instantiate_binder_with_placeholders(obligation.predicate);
let obligation_trait_ref =
ocx.normalize(&ObligationCause::dummy(), param_env, placeholder_obligation.trait_ref);
@ -47,11 +47,11 @@ pub fn recompute_applicable_impls<'tcx>(
let param_env_candidate_may_apply = |poly_trait_predicate: ty::PolyTraitPredicate<'tcx>| {
let ocx = ObligationCtxt::new_in_snapshot(infcx);
let placeholder_obligation =
infcx.replace_bound_vars_with_placeholders(obligation.predicate);
infcx.instantiate_binder_with_placeholders(obligation.predicate);
let obligation_trait_ref =
ocx.normalize(&ObligationCause::dummy(), param_env, placeholder_obligation.trait_ref);
let param_env_predicate = infcx.replace_bound_vars_with_fresh_vars(
let param_env_predicate = infcx.instantiate_binder_with_fresh_vars(
DUMMY_SP,
LateBoundRegionConversionTime::HigherRankedType,
poly_trait_predicate,

2
compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
View file

@ -1716,7 +1716,7 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
let (values, err) = if let ty::PredicateKind::Clause(ty::Clause::Projection(data)) =
bound_predicate.skip_binder()
{
let data = self.replace_bound_vars_with_fresh_vars(
let data = self.instantiate_binder_with_fresh_vars(
obligation.cause.span,
infer::LateBoundRegionConversionTime::HigherRankedType,
bound_predicate.rebind(data),

10
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
View file

@ -898,7 +898,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
return false;
}
let self_ty = self.replace_bound_vars_with_fresh_vars(
let self_ty = self.instantiate_binder_with_fresh_vars(
DUMMY_SP,
LateBoundRegionConversionTime::FnCall,
trait_pred.self_ty(),
@ -1191,7 +1191,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
}
}) else { return None; };
let output = self.replace_bound_vars_with_fresh_vars(
let output = self.instantiate_binder_with_fresh_vars(
DUMMY_SP,
LateBoundRegionConversionTime::FnCall,
output,
@ -1200,7 +1200,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
.skip_binder()
.iter()
.map(|ty| {
self.replace_bound_vars_with_fresh_vars(
self.instantiate_binder_with_fresh_vars(
DUMMY_SP,
LateBoundRegionConversionTime::FnCall,
inputs.rebind(*ty),
@ -3806,13 +3806,13 @@ fn hint_missing_borrow<'tcx>(
err: &mut Diagnostic,
) {
let found_args = match found.kind() {
ty::FnPtr(f) => infcx.replace_bound_vars_with_placeholders(*f).inputs().iter(),
ty::FnPtr(f) => infcx.instantiate_binder_with_placeholders(*f).inputs().iter(),
kind => {
span_bug!(span, "found was converted to a FnPtr above but is now {:?}", kind)
}
};
let expected_args = match expected.kind() {
ty::FnPtr(f) => infcx.replace_bound_vars_with_placeholders(*f).inputs().iter(),
ty::FnPtr(f) => infcx.instantiate_binder_with_placeholders(*f).inputs().iter(),
kind => {
span_bug!(span, "expected was converted to a FnPtr above but is now {:?}", kind)
}

2
compiler/rustc_trait_selection/src/traits/fulfill.rs
View file

@ -321,7 +321,7 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> {
| ty::PredicateKind::ConstEvaluatable(..)
| ty::PredicateKind::ConstEquate(..) => {
let pred =
ty::Binder::dummy(infcx.replace_bound_vars_with_placeholders(binder));
ty::Binder::dummy(infcx.instantiate_binder_with_placeholders(binder));
ProcessResult::Changed(mk_pending(vec![obligation.with(infcx.tcx, pred)]))
}
ty::PredicateKind::Ambiguous => ProcessResult::Unchanged,

4
compiler/rustc_trait_selection/src/traits/project.rs
View file

@ -215,7 +215,7 @@ pub(super) fn poly_project_and_unify_type<'cx, 'tcx>(
let r = infcx.commit_if_ok(|_snapshot| {
let old_universe = infcx.universe();
let placeholder_predicate =
infcx.replace_bound_vars_with_placeholders(obligation.predicate);
infcx.instantiate_binder_with_placeholders(obligation.predicate);
let new_universe = infcx.universe();
let placeholder_obligation = obligation.with(infcx.tcx, placeholder_predicate);
@ -2046,7 +2046,7 @@ fn confirm_param_env_candidate<'cx, 'tcx>(
let cause = &obligation.cause;
let param_env = obligation.param_env;
let cache_entry = infcx.replace_bound_vars_with_fresh_vars(
let cache_entry = infcx.instantiate_binder_with_fresh_vars(
cause.span,
LateBoundRegionConversionTime::HigherRankedType,
poly_cache_entry,

2
compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs
View file

@ -488,7 +488,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let poly_trait_predicate = self.infcx.resolve_vars_if_possible(obligation.predicate);
let placeholder_trait_predicate =
self.infcx.replace_bound_vars_with_placeholders(poly_trait_predicate);
self.infcx.instantiate_binder_with_placeholders(poly_trait_predicate);
// Count only those upcast versions that match the trait-ref
// we are looking for. Specifically, do not only check for the

12
compiler/rustc_trait_selection/src/traits/select/confirmation.rs
View file

@ -151,7 +151,7 @@ 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).trait_ref;
self.infcx.instantiate_binder_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() {
@ -336,7 +336,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let cause = obligation.derived_cause(BuiltinDerivedObligation);
let poly_trait_ref = obligation.predicate.to_poly_trait_ref();
let trait_ref = self.infcx.replace_bound_vars_with_placeholders(poly_trait_ref);
let trait_ref = self.infcx.instantiate_binder_with_placeholders(poly_trait_ref);
let trait_obligations: Vec<PredicateObligation<'_>> = self.impl_or_trait_obligations(
&cause,
obligation.recursion_depth + 1,
@ -427,7 +427,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let tcx = self.tcx();
debug!(?obligation, ?index, "confirm_object_candidate");
let trait_predicate = self.infcx.replace_bound_vars_with_placeholders(obligation.predicate);
let trait_predicate = self.infcx.instantiate_binder_with_placeholders(obligation.predicate);
let self_ty = self.infcx.shallow_resolve(trait_predicate.self_ty());
let obligation_trait_ref = ty::Binder::dummy(trait_predicate.trait_ref);
let ty::Dynamic(data, ..) = *self_ty.kind() else {
@ -437,7 +437,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let object_trait_ref = data.principal().unwrap_or_else(|| {
span_bug!(obligation.cause.span, "object candidate with no principal")
});
let object_trait_ref = self.infcx.replace_bound_vars_with_fresh_vars(
let object_trait_ref = self.infcx.instantiate_binder_with_fresh_vars(
obligation.cause.span,
HigherRankedType,
object_trait_ref,
@ -629,7 +629,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
}
// Confirm the `type Output: Sized;` bound that is present on `FnOnce`
let output_ty = self.infcx.replace_bound_vars_with_placeholders(sig.output());
let output_ty = self.infcx.instantiate_binder_with_placeholders(sig.output());
let output_ty = normalize_with_depth_to(
self,
obligation.param_env,
@ -652,7 +652,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
debug!(?obligation, "confirm_trait_alias_candidate");
let alias_def_id = obligation.predicate.def_id();
let predicate = self.infcx.replace_bound_vars_with_placeholders(obligation.predicate);
let predicate = self.infcx.instantiate_binder_with_placeholders(obligation.predicate);
let trait_ref = predicate.trait_ref;
let trait_def_id = trait_ref.def_id;
let substs = trait_ref.substs;

8
compiler/rustc_trait_selection/src/traits/select/mod.rs
View file

@ -1618,7 +1618,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
) -> smallvec::SmallVec<[(usize, ty::BoundConstness); 2]> {
let poly_trait_predicate = self.infcx.resolve_vars_if_possible(obligation.predicate);
let placeholder_trait_predicate =
self.infcx.replace_bound_vars_with_placeholders(poly_trait_predicate);
self.infcx.instantiate_binder_with_placeholders(poly_trait_predicate);
debug!(?placeholder_trait_predicate);
let tcx = self.infcx.tcx;
@ -1738,7 +1738,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
potentially_unnormalized_candidates: bool,
) -> ProjectionMatchesProjection {
let mut nested_obligations = Vec::new();
let infer_predicate = self.infcx.replace_bound_vars_with_fresh_vars(
let infer_predicate = self.infcx.instantiate_binder_with_fresh_vars(
obligation.cause.span,
LateBoundRegionConversionTime::HigherRankedType,
env_predicate,
@ -2339,7 +2339,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
.flat_map(|ty| {
let ty: ty::Binder<'tcx, Ty<'tcx>> = types.rebind(*ty); // <----/
let placeholder_ty = self.infcx.replace_bound_vars_with_placeholders(ty);
let placeholder_ty = self.infcx.instantiate_binder_with_placeholders(ty);
let Normalized { value: normalized_ty, mut obligations } =
ensure_sufficient_stack(|| {
project::normalize_with_depth(
@ -2418,7 +2418,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
obligation: &TraitObligation<'tcx>,
) -> Result<Normalized<'tcx, SubstsRef<'tcx>>, ()> {
let placeholder_obligation =
self.infcx.replace_bound_vars_with_placeholders(obligation.predicate);
self.infcx.instantiate_binder_with_placeholders(obligation.predicate);
let placeholder_obligation_trait_ref = placeholder_obligation.trait_ref;
let impl_substs = self.infcx.fresh_substs_for_item(obligation.cause.span, impl_def_id);