Rollup merge of #106389 - compiler-errors:no-canonicalized, r=lcnr

fee1-dead · web-flow · commit f8319bb40356 · 2023-01-09T23:35:30.000+08:00
Simplify some canonical type alias names

* delete the `Canonicalized&lt;'tcx&gt;` type alias in favor for `Canonical&lt;'tcx&gt;`
* `CanonicalizedQueryResponse` -&gt; `CanonicalQueryResponse`

I don't particularly care about the latter, but it should be consistent. We could alternatively delete the first alias and rename the struct to `Canonicalized`, and then keep the name of `CanonicalizedQueryResponse` untouched.
diff --git a/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs b/compiler/rustc_infer/src/infer/canonical/canonicalizer.rs
@@ -6,8 +6,7 @@
 //! [c]: https://rust-lang.github.io/chalk/book/canonical_queries/canonicalization.html
 
 use crate::infer::canonical::{
-    Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, Canonicalized,
-    OriginalQueryValues,
+    Canonical, CanonicalTyVarKind, CanonicalVarInfo, CanonicalVarKind, OriginalQueryValues,
 };
 use crate::infer::InferCtxt;
 use rustc_middle::ty::flags::FlagComputation;
@@ -40,7 +39,7 @@ impl<'tcx> InferCtxt<'tcx> {
         &self,
         value: V,
         query_state: &mut OriginalQueryValues<'tcx>,
-    ) -> Canonicalized<'tcx, V>
+    ) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
@@ -59,7 +58,7 @@ impl<'tcx> InferCtxt<'tcx> {
         &self,
         value: V,
         query_state: &mut OriginalQueryValues<'tcx>,
-    ) -> Canonicalized<'tcx, V>
+    ) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
@@ -99,7 +98,7 @@ impl<'tcx> InferCtxt<'tcx> {
     /// out the [chapter in the rustc dev guide][c].
     ///
     /// [c]: https://rust-lang.github.io/chalk/book/canonical_queries/canonicalization.html#canonicalizing-the-query-result
-    pub fn canonicalize_response<V>(&self, value: V) -> Canonicalized<'tcx, V>
+    pub fn canonicalize_response<V>(&self, value: V) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
@@ -113,7 +112,7 @@ impl<'tcx> InferCtxt<'tcx> {
         )
     }
 
-    pub fn canonicalize_user_type_annotation<V>(&self, value: V) -> Canonicalized<'tcx, V>
+    pub fn canonicalize_user_type_annotation<V>(&self, value: V) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
@@ -135,7 +134,7 @@ impl<'tcx> InferCtxt<'tcx> {
         &self,
         value: V,
         query_state: &mut OriginalQueryValues<'tcx>,
-    ) -> Canonicalized<'tcx, V>
+    ) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
@@ -524,7 +523,7 @@ impl<'cx, 'tcx> Canonicalizer<'cx, 'tcx> {
         tcx: TyCtxt<'tcx>,
         canonicalize_region_mode: &dyn CanonicalizeMode,
         query_state: &mut OriginalQueryValues<'tcx>,
-    ) -> Canonicalized<'tcx, V>
+    ) -> Canonical<'tcx, V>
     where
         V: TypeFoldable<'tcx>,
     {
diff --git a/compiler/rustc_infer/src/infer/canonical/query_response.rs b/compiler/rustc_infer/src/infer/canonical/query_response.rs
@@ -9,7 +9,7 @@
 
 use crate::infer::canonical::substitute::{substitute_value, CanonicalExt};
 use crate::infer::canonical::{
-    Canonical, CanonicalVarValues, CanonicalizedQueryResponse, Certainty, OriginalQueryValues,
+    Canonical, CanonicalQueryResponse, CanonicalVarValues, Certainty, OriginalQueryValues,
     QueryOutlivesConstraint, QueryRegionConstraints, QueryResponse,
 };
 use crate::infer::nll_relate::{NormalizationStrategy, TypeRelating, TypeRelatingDelegate};
@@ -57,7 +57,7 @@ impl<'tcx> InferCtxt<'tcx> {
         inference_vars: CanonicalVarValues<'tcx>,
         answer: T,
         fulfill_cx: &mut dyn TraitEngine<'tcx>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, T>>
+    ) -> Fallible<CanonicalQueryResponse<'tcx, T>>
     where
         T: Debug + TypeFoldable<'tcx>,
         Canonical<'tcx, QueryResponse<'tcx, T>>: ArenaAllocatable<'tcx>,
diff --git a/compiler/rustc_middle/src/infer/canonical.rs b/compiler/rustc_middle/src/infer/canonical.rs
@@ -213,9 +213,7 @@ impl QueryRegionConstraints<'_> {
     }
 }
 
-pub type Canonicalized<'tcx, V> = Canonical<'tcx, V>;
-
-pub type CanonicalizedQueryResponse<'tcx, T> = &'tcx Canonical<'tcx, QueryResponse<'tcx, T>>;
+pub type CanonicalQueryResponse<'tcx, T> = &'tcx Canonical<'tcx, QueryResponse<'tcx, T>>;
 
 /// Indicates whether or not we were able to prove the query to be
 /// true.
diff --git a/compiler/rustc_middle/src/ty/typeck_results.rs b/compiler/rustc_middle/src/ty/typeck_results.rs
@@ -626,7 +626,7 @@ pub struct CanonicalUserTypeAnnotation<'tcx> {
     pub inferred_ty: Ty<'tcx>,
 }
 
-/// Canonicalized user type annotation.
+/// Canonical user type annotation.
 pub type CanonicalUserType<'tcx> = Canonical<'tcx, UserType<'tcx>>;
 
 impl<'tcx> CanonicalUserType<'tcx> {
diff --git a/compiler/rustc_trait_selection/src/infer.rs b/compiler/rustc_trait_selection/src/infer.rs
@@ -4,7 +4,7 @@ use crate::traits::{self, ObligationCtxt};
 use rustc_hir::def_id::DefId;
 use rustc_hir::lang_items::LangItem;
 use rustc_middle::arena::ArenaAllocatable;
-use rustc_middle::infer::canonical::{Canonical, CanonicalizedQueryResponse, QueryResponse};
+use rustc_middle::infer::canonical::{Canonical, CanonicalQueryResponse, QueryResponse};
 use rustc_middle::traits::query::Fallible;
 use rustc_middle::ty::{self, Ty, TypeFoldable, TypeVisitable};
 use rustc_middle::ty::{GenericArg, ToPredicate};
@@ -102,7 +102,7 @@ pub trait InferCtxtBuilderExt<'tcx> {
         &mut self,
         canonical_key: &Canonical<'tcx, K>,
         operation: impl FnOnce(&ObligationCtxt<'_, 'tcx>, K) -> Fallible<R>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, R>>
+    ) -> Fallible<CanonicalQueryResponse<'tcx, R>>
     where
         K: TypeFoldable<'tcx>,
         R: Debug + TypeFoldable<'tcx>,
@@ -130,7 +130,7 @@ impl<'tcx> InferCtxtBuilderExt<'tcx> for InferCtxtBuilder<'tcx> {
         &mut self,
         canonical_key: &Canonical<'tcx, K>,
         operation: impl FnOnce(&ObligationCtxt<'_, 'tcx>, K) -> Fallible<R>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, R>>
+    ) -> Fallible<CanonicalQueryResponse<'tcx, R>>
     where
         K: TypeFoldable<'tcx>,
         R: Debug + TypeFoldable<'tcx>,
diff --git a/compiler/rustc_trait_selection/src/traits/engine.rs b/compiler/rustc_trait_selection/src/traits/engine.rs
@@ -9,7 +9,7 @@ use rustc_data_structures::fx::FxIndexSet;
 use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_infer::infer::at::ToTrace;
 use rustc_infer::infer::canonical::{
-    Canonical, CanonicalVarValues, CanonicalizedQueryResponse, QueryResponse,
+    Canonical, CanonicalQueryResponse, CanonicalVarValues, QueryResponse,
 };
 use rustc_infer::infer::{InferCtxt, InferOk};
 use rustc_infer::traits::query::Fallible;
@@ -215,7 +215,7 @@ impl<'a, 'tcx> ObligationCtxt<'a, 'tcx> {
         &self,
         inference_vars: CanonicalVarValues<'tcx>,
         answer: T,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, T>>
+    ) -> Fallible<CanonicalQueryResponse<'tcx, T>>
     where
         T: Debug + TypeFoldable<'tcx>,
         Canonical<'tcx, QueryResponse<'tcx, T>>: ArenaAllocatable<'tcx>,
diff --git a/compiler/rustc_trait_selection/src/traits/mod.rs b/compiler/rustc_trait_selection/src/traits/mod.rs
@@ -102,7 +102,7 @@ pub enum TraitQueryMode {
     /// spans etc. passed in and hence can do reasonable
     /// error reporting on their own.
     Standard,
-    /// Canonicalized queries get dummy spans and hence
+    /// Canonical queries get dummy spans and hence
     /// must generally propagate errors to
     /// pre-canonicalization callsites.
     Canonical,
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/ascribe_user_type.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/ascribe_user_type.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 
@@ -16,8 +16,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for AscribeUserType<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, ()>> {
         tcx.type_op_ascribe_user_type(canonicalized)
     }
 }
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/eq.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/eq.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 
@@ -16,8 +16,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for Eq<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, ()>> {
         tcx.type_op_eq(canonicalized)
     }
 }
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_infer::traits::query::OutlivesBound;
 use rustc_middle::ty::{self, ParamEnvAnd, Ty, TyCtxt};
@@ -27,8 +27,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for ImpliedOutlivesBounds<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self::QueryResponse>> {
         // FIXME this `unchecked_map` is only necessary because the
         // query is defined as taking a `ParamEnvAnd<Ty>`; it should
         // take an `ImpliedOutlivesBounds` instead
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/mod.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/mod.rs
@@ -1,10 +1,10 @@
 use crate::infer::canonical::{
-    Canonicalized, CanonicalizedQueryResponse, OriginalQueryValues, QueryRegionConstraints,
+    Canonical, CanonicalQueryResponse, OriginalQueryValues, QueryRegionConstraints,
 };
 use crate::infer::{InferCtxt, InferOk};
 use crate::traits::query::Fallible;
 use crate::traits::ObligationCause;
-use rustc_infer::infer::canonical::{Canonical, Certainty};
+use rustc_infer::infer::canonical::Certainty;
 use rustc_infer::traits::query::NoSolution;
 use rustc_infer::traits::PredicateObligations;
 use rustc_middle::ty::fold::TypeFoldable;
@@ -73,8 +73,8 @@ pub trait QueryTypeOp<'tcx>: fmt::Debug + Copy + TypeFoldable<'tcx> + 'tcx {
     /// not captured in the return value.
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>>;
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self::QueryResponse>>;
 
     fn fully_perform_into(
         query_key: ParamEnvAnd<'tcx, Self>,
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::{self, Lift, ParamEnvAnd, Ty, TyCtxt};
@@ -18,51 +18,51 @@ where
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self::QueryResponse>> {
         T::type_op_method(tcx, canonicalized)
     }
 }
 
 pub trait Normalizable<'tcx>: fmt::Debug + TypeFoldable<'tcx> + Lift<'tcx> + Copy {
     fn type_op_method(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>>;
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self>>;
 }
 
 impl<'tcx> Normalizable<'tcx> for Ty<'tcx> {
     fn type_op_method(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self>> {
         tcx.type_op_normalize_ty(canonicalized)
     }
 }
 
 impl<'tcx> Normalizable<'tcx> for ty::Predicate<'tcx> {
     fn type_op_method(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self>> {
         tcx.type_op_normalize_predicate(canonicalized)
     }
 }
 
 impl<'tcx> Normalizable<'tcx> for ty::PolyFnSig<'tcx> {
     fn type_op_method(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self>> {
         tcx.type_op_normalize_poly_fn_sig(canonicalized)
     }
 }
 
 impl<'tcx> Normalizable<'tcx> for ty::FnSig<'tcx> {
     fn type_op_method(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Normalize<Self>>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self>> {
         tcx.type_op_normalize_fn_sig(canonicalized)
     }
 }
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/outlives.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/outlives.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::dropck_outlives::{trivial_dropck_outlives, DropckOutlivesResult};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::{ParamEnvAnd, Ty, TyCtxt};
@@ -30,8 +30,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for DropckOutlives<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, Self::QueryResponse>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, Self::QueryResponse>> {
         // Subtle: note that we are not invoking
         // `infcx.at(...).dropck_outlives(...)` here, but rather the
         // underlying `dropck_outlives` query. This same underlying
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/prove_predicate.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/prove_predicate.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::{self, ParamEnvAnd, TyCtxt};
 
@@ -32,8 +32,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for ProvePredicate<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        mut canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {
+        mut canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, ()>> {
         match canonicalized.value.value.predicate.kind().skip_binder() {
             ty::PredicateKind::Clause(ty::Clause::Trait(pred)) => {
                 canonicalized.value.param_env.remap_constness_with(pred.constness);
diff --git a/compiler/rustc_trait_selection/src/traits/query/type_op/subtype.rs b/compiler/rustc_trait_selection/src/traits/query/type_op/subtype.rs
@@ -1,4 +1,4 @@
-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::Fallible;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 
@@ -13,8 +13,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for Subtype<'tcx> {
 
     fn perform_query(
         tcx: TyCtxt<'tcx>,
-        canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,
-    ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {
+        canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,
+    ) -> Fallible<CanonicalQueryResponse<'tcx, ()>> {
         tcx.type_op_subtype(canonicalized)
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -213,9 +213,7 @@ impl QueryRegionConstraints<'_> {`
`213`	`213`	`}`
`214`	`214`	`}`
`215`	`215`
`216`		`-pub type Canonicalized<'tcx, V> = Canonical<'tcx, V>;`
`217`		`-`
`218`		`-pub type CanonicalizedQueryResponse<'tcx, T> = &'tcx Canonical<'tcx, QueryResponse<'tcx, T>>;`
	`216`	`+pub type CanonicalQueryResponse<'tcx, T> = &'tcx Canonical<'tcx, QueryResponse<'tcx, T>>;`
`219`	`217`
`220`	`218`	`/// Indicates whether or not we were able to prove the query to be`
`221`	`219`	`/// true.`
Original file line number	Diff line number	Diff line change
`@@ -626,7 +626,7 @@ pub struct CanonicalUserTypeAnnotation<'tcx> {`
`626`	`626`	`pub inferred_ty: Ty<'tcx>,`
`627`	`627`	`}`
`628`	`628`
`629`		`-/// Canonicalized user type annotation.`
	`629`	`+/// Canonical user type annotation.`
`630`	`630`	`pub type CanonicalUserType<'tcx> = Canonical<'tcx, UserType<'tcx>>;`
`631`	`631`
`632`	`632`	`impl<'tcx> CanonicalUserType<'tcx> {`
Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-use crate::infer::canonical::{Canonicalized, CanonicalizedQueryResponse};`
	`1`	`+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};`
`2`	`2`	`use crate::traits::query::Fallible;`
`3`	`3`	`use rustc_middle::ty::{ParamEnvAnd, TyCtxt};`
`4`	`4`
`@@ -16,8 +16,8 @@ impl<'tcx> super::QueryTypeOp<'tcx> for AscribeUserType<'tcx> {`
`16`	`16`
`17`	`17`	`fn perform_query(`
`18`	`18`	`tcx: TyCtxt<'tcx>,`
`19`		`- canonicalized: Canonicalized<'tcx, ParamEnvAnd<'tcx, Self>>,`
`20`		`- ) -> Fallible<CanonicalizedQueryResponse<'tcx, ()>> {`
	`19`	`+ canonicalized: Canonical<'tcx, ParamEnvAnd<'tcx, Self>>,`
	`20`	`+ ) -> Fallible<CanonicalQueryResponse<'tcx, ()>> {`
`21`	`21`	`tcx.type_op_ascribe_user_type(canonicalized)`
`22`	`22`	`}`
`23`	`23`	`}`