Reformat use declarations.

The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.

compiler/rustc_trait_selection/src/traits/query/dropck_outlives.rs

@@ -1,12 +1,12 @@
-use crate::traits::query::normalize::QueryNormalizeExt;
-use crate::traits::query::NoSolution;
-use crate::traits::{Normalized, ObligationCause, ObligationCtxt};
-
 use rustc_data_structures::fx::FxHashSet;
 use rustc_middle::traits::query::{DropckConstraint, DropckOutlivesResult};
 use rustc_middle::ty::{self, EarlyBinder, ParamEnvAnd, Ty, TyCtxt};
 use rustc_span::{Span, DUMMY_SP};
 
+use crate::traits::query::normalize::QueryNormalizeExt;
+use crate::traits::query::NoSolution;
+use crate::traits::{Normalized, ObligationCause, ObligationCtxt};
+
 /// This returns true if the type `ty` is "trivial" for
 /// dropck-outlives -- that is, if it doesn't require any types to
 /// outlive. This is similar but not *quite* the same as the

compiler/rustc_trait_selection/src/traits/query/normalize.rs

@@ -2,26 +2,26 @@
 //! which folds deeply, invoking the underlying
 //! `normalize_canonicalized_projection_ty` query when it encounters projections.
 
-use crate::error_reporting::traits::OverflowCause;
-use crate::error_reporting::InferCtxtErrorExt;
-use crate::infer::at::At;
-use crate::infer::canonical::OriginalQueryValues;
-use crate::infer::{InferCtxt, InferOk};
-use crate::traits::normalize::needs_normalization;
-use crate::traits::Normalized;
-use crate::traits::{BoundVarReplacer, PlaceholderReplacer, ScrubbedTraitError};
-use crate::traits::{ObligationCause, PredicateObligation, Reveal};
 use rustc_data_structures::sso::SsoHashMap;
 use rustc_data_structures::stack::ensure_sufficient_stack;
 use rustc_macros::extension;
+pub use rustc_middle::traits::query::NormalizationResult;
 use rustc_middle::ty::fold::{FallibleTypeFolder, TypeFoldable, TypeSuperFoldable};
 use rustc_middle::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt};
 use rustc_middle::ty::{self, Ty, TyCtxt, TypeVisitor};
 use rustc_span::DUMMY_SP;
 
 use super::NoSolution;
-
-pub use rustc_middle::traits::query::NormalizationResult;
+use crate::error_reporting::traits::OverflowCause;
+use crate::error_reporting::InferCtxtErrorExt;
+use crate::infer::at::At;
+use crate::infer::canonical::OriginalQueryValues;
+use crate::infer::{InferCtxt, InferOk};
+use crate::traits::normalize::needs_normalization;
+use crate::traits::{
+    BoundVarReplacer, Normalized, ObligationCause, PlaceholderReplacer, PredicateObligation,
+    Reveal, ScrubbedTraitError,
+};
 
 #[extension(pub trait QueryNormalizeExt<'tcx>)]
 impl<'cx, 'tcx> At<'cx, 'tcx> {

compiler/rustc_trait_selection/src/traits/query/type_op/ascribe_user_type.rs

@@ -1,14 +1,14 @@
-use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
-use crate::traits::ObligationCtxt;
 use rustc_hir::def_id::{DefId, CRATE_DEF_ID};
 use rustc_infer::traits::Obligation;
+pub use rustc_middle::traits::query::type_op::AscribeUserType;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::{ObligationCause, ObligationCauseCode};
 use rustc_middle::ty::{self, ParamEnvAnd, Ty, TyCtxt, UserArgs, UserSelfTy, UserType};
-
-pub use rustc_middle::traits::query::type_op::AscribeUserType;
 use rustc_span::{Span, DUMMY_SP};
 
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
+use crate::traits::ObligationCtxt;
+
 impl<'tcx> super::QueryTypeOp<'tcx> for AscribeUserType<'tcx> {
     type QueryResponse = ();
 

compiler/rustc_trait_selection/src/traits/query/type_op/custom.rs

@@ -1,14 +1,15 @@
-use crate::infer::canonical::query_response;
-use crate::infer::InferCtxt;
-use crate::traits::query::type_op::TypeOpOutput;
-use crate::traits::ObligationCtxt;
+use std::fmt;
+
 use rustc_errors::ErrorGuaranteed;
 use rustc_infer::infer::region_constraints::RegionConstraintData;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::ty::{TyCtxt, TypeFoldable};
 use rustc_span::Span;
 
-use std::fmt;
+use crate::infer::canonical::query_response;
+use crate::infer::InferCtxt;
+use crate::traits::query::type_op::TypeOpOutput;
+use crate::traits::ObligationCtxt;
 
 pub struct CustomTypeOp<F> {
     closure: F,

compiler/rustc_trait_selection/src/traits/query/type_op/eq.rs

@@ -1,10 +1,10 @@
-use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
-use crate::traits::ObligationCtxt;
+pub use rustc_middle::traits::query::type_op::Eq;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 
-pub use rustc_middle::traits::query::type_op::Eq;
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
+use crate::traits::ObligationCtxt;
 
 impl<'tcx> super::QueryTypeOp<'tcx> for Eq<'tcx> {
     type QueryResponse = ();

compiler/rustc_trait_selection/src/traits/query/type_op/implied_outlives_bounds.rs

@@ -1,7 +1,3 @@
-use crate::traits::query::NoSolution;
-use crate::traits::wf;
-use crate::traits::ObligationCtxt;
-
 use rustc_infer::infer::canonical::Canonical;
 use rustc_infer::infer::resolve::OpportunisticRegionResolver;
 use rustc_infer::traits::query::OutlivesBound;
@@ -14,6 +10,9 @@ use rustc_span::DUMMY_SP;
 use rustc_type_ir::outlives::{push_outlives_components, Component};
 use smallvec::{smallvec, SmallVec};
 
+use crate::traits::query::NoSolution;
+use crate::traits::{wf, ObligationCtxt};
+
 #[derive(Copy, Clone, Debug, HashStable, TypeFoldable, TypeVisitable)]
 pub struct ImpliedOutlivesBounds<'tcx> {
     pub ty: Ty<'tcx>,

compiler/rustc_trait_selection/src/traits/query/type_op/mod.rs

@@ -1,8 +1,5 @@
-use crate::infer::canonical::{
-    Canonical, CanonicalQueryResponse, OriginalQueryValues, QueryRegionConstraints,
-};
-use crate::infer::{InferCtxt, InferOk};
-use crate::traits::{ObligationCause, ObligationCtxt};
+use std::fmt;
+
 use rustc_errors::ErrorGuaranteed;
 use rustc_infer::infer::canonical::Certainty;
 use rustc_infer::traits::PredicateObligation;
@@ -10,7 +7,12 @@ use rustc_middle::traits::query::NoSolution;
 use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 use rustc_span::Span;
-use std::fmt;
+
+use crate::infer::canonical::{
+    Canonical, CanonicalQueryResponse, OriginalQueryValues, QueryRegionConstraints,
+};
+use crate::infer::{InferCtxt, InferOk};
+use crate::traits::{ObligationCause, ObligationCtxt};
 
 pub mod ascribe_user_type;
 pub mod custom;

compiler/rustc_trait_selection/src/traits/query/type_op/normalize.rs

@@ -1,12 +1,13 @@
-use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
-use crate::traits::ObligationCtxt;
+use std::fmt;
+
+pub use rustc_middle::traits::query::type_op::Normalize;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::fold::TypeFoldable;
 use rustc_middle::ty::{self, Lift, ParamEnvAnd, Ty, TyCtxt, TypeVisitableExt};
-use std::fmt;
 
-pub use rustc_middle::traits::query::type_op::Normalize;
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
+use crate::traits::ObligationCtxt;
 
 impl<'tcx, T> super::QueryTypeOp<'tcx> for Normalize<T>
 where

compiler/rustc_trait_selection/src/traits/query/type_op/outlives.rs

@@ -1,11 +1,12 @@
+use rustc_macros::{HashStable, TypeFoldable, TypeVisitable};
+use rustc_middle::traits::query::{DropckOutlivesResult, NoSolution};
+use rustc_middle::ty::{ParamEnvAnd, Ty, TyCtxt};
+
 use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
 use crate::traits::query::dropck_outlives::{
     compute_dropck_outlives_inner, trivial_dropck_outlives,
 };
 use crate::traits::ObligationCtxt;
-use rustc_macros::{HashStable, TypeFoldable, TypeVisitable};
-use rustc_middle::traits::query::{DropckOutlivesResult, NoSolution};
-use rustc_middle::ty::{ParamEnvAnd, Ty, TyCtxt};
 
 #[derive(Copy, Clone, Debug, HashStable, TypeFoldable, TypeVisitable)]
 pub struct DropckOutlives<'tcx> {

compiler/rustc_trait_selection/src/traits/query/type_op/prove_predicate.rs

@@ -1,11 +1,11 @@
-use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
-use crate::traits::ObligationCtxt;
 use rustc_infer::traits::Obligation;
+pub use rustc_middle::traits::query::type_op::ProvePredicate;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::{self, ParamEnvAnd, TyCtxt};
 
-pub use rustc_middle::traits::query::type_op::ProvePredicate;
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
+use crate::traits::ObligationCtxt;
 
 impl<'tcx> super::QueryTypeOp<'tcx> for ProvePredicate<'tcx> {
     type QueryResponse = ();

compiler/rustc_trait_selection/src/traits/query/type_op/subtype.rs

@@ -1,10 +1,10 @@
-use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
-use crate::traits::ObligationCtxt;
+pub use rustc_middle::traits::query::type_op::Subtype;
 use rustc_middle::traits::query::NoSolution;
 use rustc_middle::traits::ObligationCause;
 use rustc_middle::ty::{ParamEnvAnd, TyCtxt};
 
-pub use rustc_middle::traits::query::type_op::Subtype;
+use crate::infer::canonical::{Canonical, CanonicalQueryResponse};
+use crate::traits::ObligationCtxt;
 
 impl<'tcx> super::QueryTypeOp<'tcx> for Subtype<'tcx> {
     type QueryResponse = ();