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_ty_utils/src/abi.rs

@@ -1,3 +1,5 @@
+use std::iter;
+
 use rustc_hir as hir;
 use rustc_hir::lang_items::LangItem;
 use rustc_middle::bug;
@@ -16,8 +18,6 @@ use rustc_target::abi::*;
 use rustc_target::spec::abi::Abi as SpecAbi;
 use tracing::debug;
 
-use std::iter;
-
 pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { fn_abi_of_fn_ptr, fn_abi_of_instance, ..*providers };
 }

compiler/rustc_ty_utils/src/consts.rs

@@ -1,20 +1,19 @@
+use std::iter;
+
 use rustc_errors::ErrorGuaranteed;
 use rustc_hir::def::DefKind;
 use rustc_hir::def_id::LocalDefId;
-use rustc_middle::bug;
 use rustc_middle::mir::interpret::{LitToConstError, LitToConstInput};
 use rustc_middle::query::Providers;
 use rustc_middle::thir::visit;
 use rustc_middle::thir::visit::Visitor;
 use rustc_middle::ty::abstract_const::CastKind;
 use rustc_middle::ty::{self, Expr, TyCtxt, TypeVisitableExt};
-use rustc_middle::{mir, thir};
+use rustc_middle::{bug, mir, thir};
 use rustc_span::Span;
 use rustc_target::abi::{VariantIdx, FIRST_VARIANT};
 use tracing::{debug, instrument};
 
-use std::iter;
-
 use crate::errors::{GenericConstantTooComplex, GenericConstantTooComplexSub};
 
 /// Destructures array, ADT or tuple constants into the constants

compiler/rustc_ty_utils/src/implied_bounds.rs

@@ -1,3 +1,5 @@
+use std::iter;
+
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir as hir;
 use rustc_hir::def::DefKind;
@@ -6,7 +8,6 @@ use rustc_middle::bug;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, Ty, TyCtxt};
 use rustc_span::Span;
-use std::iter;
 
 pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers {

compiler/rustc_ty_utils/src/instance.rs

@@ -6,8 +6,7 @@ use rustc_middle::bug;
 use rustc_middle::query::Providers;
 use rustc_middle::traits::{BuiltinImplSource, CodegenObligationError};
 use rustc_middle::ty::util::AsyncDropGlueMorphology;
-use rustc_middle::ty::GenericArgsRef;
-use rustc_middle::ty::{self, Instance, TyCtxt, TypeVisitableExt};
+use rustc_middle::ty::{self, GenericArgsRef, Instance, TyCtxt, TypeVisitableExt};
 use rustc_span::sym;
 use rustc_trait_selection::traits;
 use rustc_type_ir::ClosureKind;

compiler/rustc_ty_utils/src/layout.rs

@@ -1,3 +1,6 @@
+use std::fmt::Debug;
+use std::iter;
+
 use hir::def_id::DefId;
 use rustc_hir as hir;
 use rustc_index::bit_set::BitSet;
@@ -19,9 +22,6 @@ use rustc_span::symbol::Symbol;
 use rustc_target::abi::*;
 use tracing::{debug, instrument, trace};
 
-use std::fmt::Debug;
-use std::iter;
-
 use crate::errors::{
     MultipleArrayFieldsSimdType, NonPrimitiveSimdType, OversizedSimdType, ZeroLengthSimdType,
 };

compiler/rustc_ty_utils/src/layout_sanity_check.rs

@@ -1,12 +1,10 @@
-use rustc_middle::bug;
-use rustc_middle::ty::{
-    layout::{LayoutCx, TyAndLayout},
-    TyCtxt,
-};
-use rustc_target::abi::*;
-
 use std::assert_matches::assert_matches;
 
+use rustc_middle::bug;
+use rustc_middle::ty::layout::{LayoutCx, TyAndLayout};
+use rustc_middle::ty::TyCtxt;
+use rustc_target::abi::*;
+
 /// Enforce some basic invariants on layouts.
 pub(super) fn sanity_check_layout<'tcx>(
     cx: &LayoutCx<'tcx, TyCtxt<'tcx>>,

compiler/rustc_ty_utils/src/needs_drop.rs

@@ -5,8 +5,7 @@ use rustc_hir::def_id::DefId;
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::util::{needs_drop_components, AlwaysRequiresDrop};
-use rustc_middle::ty::GenericArgsRef;
-use rustc_middle::ty::{self, EarlyBinder, Ty, TyCtxt};
+use rustc_middle::ty::{self, EarlyBinder, GenericArgsRef, Ty, TyCtxt};
 use rustc_session::Limit;
 use rustc_span::sym;
 use tracing::debug;

compiler/rustc_ty_utils/src/opaque_types.rs

@@ -1,12 +1,12 @@
 use rustc_data_structures::fx::FxHashSet;
+use rustc_hir::def::DefKind;
+use rustc_hir::def_id::LocalDefId;
 use rustc_hir::intravisit::Visitor;
-use rustc_hir::{def::DefKind, def_id::LocalDefId};
 use rustc_hir::{intravisit, CRATE_HIR_ID};
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::util::{CheckRegions, NotUniqueParam};
-use rustc_middle::ty::{self, Ty, TyCtxt};
-use rustc_middle::ty::{TypeSuperVisitable, TypeVisitable, TypeVisitor};
+use rustc_middle::ty::{self, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitor};
 use rustc_span::Span;
 use tracing::{instrument, trace};
 

compiler/rustc_ty_utils/src/sig_types.rs

@@ -3,7 +3,8 @@
 
 use rustc_ast_ir::try_visit;
 use rustc_ast_ir::visit::VisitorResult;
-use rustc_hir::{def::DefKind, def_id::LocalDefId};
+use rustc_hir::def::DefKind;
+use rustc_hir::def_id::LocalDefId;
 use rustc_middle::span_bug;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_span::Span;

compiler/rustc_ty_utils/src/structural_match.rs

@@ -1,8 +1,7 @@
 use rustc_hir::lang_items::LangItem;
+use rustc_infer::infer::TyCtxtInferExt;
 use rustc_middle::query::Providers;
 use rustc_middle::ty::{self, Ty, TyCtxt};
-
-use rustc_infer::infer::TyCtxtInferExt;
 use rustc_trait_selection::traits::{ObligationCause, ObligationCtxt};
 
 /// This method returns true if and only if `adt_ty` itself has been marked as

compiler/rustc_ty_utils/src/ty.rs

@@ -5,8 +5,10 @@ use rustc_hir::LangItem;
 use rustc_index::bit_set::BitSet;
 use rustc_middle::bug;
 use rustc_middle::query::Providers;
-use rustc_middle::ty::{self, EarlyBinder, Ty, TyCtxt, TypeVisitableExt, TypeVisitor};
-use rustc_middle::ty::{TypeSuperVisitable, TypeVisitable, Upcast};
+use rustc_middle::ty::{
+    self, EarlyBinder, Ty, TyCtxt, TypeSuperVisitable, TypeVisitable, TypeVisitableExt,
+    TypeVisitor, Upcast,
+};
 use rustc_span::def_id::{DefId, LocalDefId, CRATE_DEF_ID};
 use rustc_span::DUMMY_SP;
 use rustc_trait_selection::traits;