Remove in_band_lifetimes from borrowck

compiler/rustc_borrowck/src/borrow_set.rs

@@ -84,7 +84,7 @@ pub enum LocalsStateAtExit {
 }
 
 impl LocalsStateAtExit {
- fn build(
+ fn build<'tcx>(
  locals_are_invalidated_at_exit: bool,
  body: &Body<'tcx>,
  move_data: &MoveData<'tcx>,

compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs

@@ -31,7 +31,7 @@ enum UniverseInfoInner<'tcx> {
  Other,
 }
 
-impl UniverseInfo<'tcx> {
+impl<'tcx> UniverseInfo<'tcx> {
  crate fn other() -> UniverseInfo<'tcx> {
  UniverseInfo(UniverseInfoInner::Other)
  }
@@ -191,7 +191,7 @@ struct PredicateQuery<'tcx> {
  base_universe: ty::UniverseIndex,
 }
 
-impl TypeOpInfo<'tcx> for PredicateQuery<'tcx> {
+impl<'tcx> TypeOpInfo<'tcx> for PredicateQuery<'tcx> {
  fn fallback_error(&self, tcx: TyCtxt<'tcx>, span: Span) -> DiagnosticBuilder<'tcx> {
  let mut err = tcx.sess.struct_span_err(span, "higher-ranked lifetime error");
  err.note(&format!("could not prove {}", self.canonical_query.value.value.predicate));
@@ -231,7 +231,7 @@ struct NormalizeQuery<'tcx, T> {
  base_universe: ty::UniverseIndex,
 }
 
-impl<T> TypeOpInfo<'tcx> for NormalizeQuery<'tcx, T>
+impl<'tcx, T> TypeOpInfo<'tcx> for NormalizeQuery<'tcx, T>
 where
  T: Copy + fmt::Display + TypeFoldable<'tcx> + 'tcx,
 {
@@ -291,7 +291,7 @@ struct AscribeUserTypeQuery<'tcx> {
  base_universe: ty::UniverseIndex,
 }
 
-impl TypeOpInfo<'tcx> for AscribeUserTypeQuery<'tcx> {
+impl<'tcx> TypeOpInfo<'tcx> for AscribeUserTypeQuery<'tcx> {
  fn fallback_error(&self, tcx: TyCtxt<'tcx>, span: Span) -> DiagnosticBuilder<'tcx> {
  // FIXME: This error message isn't great, but it doesn't show up in the existing UI tests,
  // and is only the fallback when the nice error fails. Consider improving this some more.

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -1598,8 +1598,8 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
  location: Location,
  mpi: MovePathIndex,
  ) -> (Vec<MoveSite>, Vec<Location>) {
- fn predecessor_locations(
- body: &'a mir::Body<'tcx>,
+ fn predecessor_locations<'a>(
+ body: &'a mir::Body<'_>,
  location: Location,
  ) -> impl Iterator<Item = Location> + 'a {
  if location.statement_index == 0 {

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -409,7 +409,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
  /// Add a note that a type does not implement `Copy`
  pub(super) fn note_type_does_not_implement_copy(
  &self,
- err: &mut DiagnosticBuilder<'a>,
+ err: &mut DiagnosticBuilder<'_>,
  place_desc: &str,
  ty: Ty<'tcx>,
  span: Option<Span>,
@@ -733,7 +733,7 @@ pub(super) enum BorrowedContentSource<'tcx> {
  OverloadedIndex(Ty<'tcx>),
 }
 
-impl BorrowedContentSource<'tcx> {
+impl<'tcx> BorrowedContentSource<'tcx> {
  pub(super) fn describe_for_unnamed_place(&self, tcx: TyCtxt<'_>) -> String {
  match *self {
  BorrowedContentSource::DerefRawPointer => "a raw pointer".to_string(),

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -747,7 +747,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
  HirId, ImplItem, ImplItemKind, Item, ItemKind,
  };
 
- fn maybe_body_id_of_fn(hir_map: &Map<'tcx>, id: HirId) -> Option<BodyId> {
+ fn maybe_body_id_of_fn(hir_map: &Map<'_>, id: HirId) -> Option<BodyId> {
  match hir_map.find(id) {
  Some(Node::Item(Item { kind: ItemKind::Fn(_, _, body_id), .. }))
  | Some(Node::ImplItem(ImplItem { kind: ImplItemKind::Fn(_, body_id), .. })) => {
@@ -1066,7 +1066,7 @@ fn is_closure_or_generator(ty: Ty<'_>) -> bool {
 /// LL | s: &'a String
 /// | ---------- use `&'a mut String` here to make mutable
 /// ```
-fn annotate_struct_field(
+fn annotate_struct_field<'tcx>(
  tcx: TyCtxt<'tcx>,
  ty: Ty<'tcx>,
  field: &mir::Field,

compiler/rustc_borrowck/src/lib.rs

@@ -3,7 +3,6 @@
 #![feature(bool_to_option)]
 #![feature(box_patterns)]
 #![feature(crate_visibility_modifier)]
-#![feature(in_band_lifetimes)]
 #![feature(let_else)]
 #![feature(min_specialization)]
 #![feature(stmt_expr_attributes)]

compiler/rustc_borrowck/src/member_constraints.rs

@@ -53,7 +53,7 @@ rustc_index::newtype_index! {
  }
 }
 
-impl Default for MemberConstraintSet<'tcx, ty::RegionVid> {
+impl Default for MemberConstraintSet<'_, ty::RegionVid> {
  fn default() -> Self {
  Self {
  first_constraints: Default::default(),
@@ -97,7 +97,7 @@ impl<'tcx> MemberConstraintSet<'tcx, ty::RegionVid> {
  }
 }
 
-impl<R1> MemberConstraintSet<'tcx, R1>
+impl<'tcx, R1> MemberConstraintSet<'tcx, R1>
 where
  R1: Copy + Hash + Eq,
 {
@@ -140,7 +140,7 @@ where
  }
 }
 
-impl<R> MemberConstraintSet<'tcx, R>
+impl<R> MemberConstraintSet<'_, R>
 where
  R: Copy + Hash + Eq,
 {

compiler/rustc_borrowck/src/path_utils.rs

@@ -141,7 +141,7 @@ pub(super) fn borrow_of_local_data(place: Place<'_>) -> bool {
 /// then returns the index of the field being projected. Note that this closure will always
 /// be `self` in the current MIR, because that is the only time we directly access the fields
 /// of a closure type.
-pub(crate) fn is_upvar_field_projection(
+pub(crate) fn is_upvar_field_projection<'tcx>(
  tcx: TyCtxt<'tcx>,
  upvars: &[Upvar<'tcx>],
  place_ref: PlaceRef<'tcx>,

compiler/rustc_borrowck/src/type_check/free_region_relations.rs

@@ -58,7 +58,7 @@ crate struct CreateResult<'tcx> {
  crate normalized_inputs_and_output: NormalizedInputsAndOutput<'tcx>,
 }
 
-crate fn create(
+crate fn create<'tcx>(
  infcx: &InferCtxt<'_, 'tcx>,
  param_env: ty::ParamEnv<'tcx>,
  implicit_region_bound: Option<ty::Region<'tcx>>,
@@ -81,7 +81,7 @@ crate fn create(
  .create()
 }
 
-impl UniversalRegionRelations<'tcx> {
+impl UniversalRegionRelations<'_> {
  /// Records in the `outlives_relation` (and
  /// `inverse_outlives_relation`) that `fr_a: fr_b`. Invoked by the
  /// builder below.
@@ -110,7 +110,7 @@ impl UniversalRegionRelations<'tcx> {
  /// outlives `fr` and (b) is not local.
  ///
  /// (*) If there are multiple competing choices, we return all of them.
- crate fn non_local_upper_bounds(&'a self, fr: &'a RegionVid) -> Vec<&'a RegionVid> {
+ crate fn non_local_upper_bounds<'a>(&'a self, fr: &'a RegionVid) -> Vec<&'a RegionVid> {
  debug!("non_local_upper_bound(fr={:?})", fr);
  let res = self.non_local_bounds(&self.inverse_outlives, fr);
  assert!(!res.is_empty(), "can't find an upper bound!?");
@@ -232,7 +232,7 @@ struct UniversalRegionRelationsBuilder<'this, 'tcx> {
  region_bound_pairs: RegionBoundPairs<'tcx>,
 }
 
-impl UniversalRegionRelationsBuilder<'cx, 'tcx> {
+impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
  crate fn create(mut self) -> CreateResult<'tcx> {
  let unnormalized_input_output_tys = self
  .universal_regions

compiler/rustc_borrowck/src/type_check/liveness/local_use_map.rs

@@ -152,7 +152,7 @@ impl LocalUseMapBuild<'_> {
  }
 }
 
-impl Visitor<'tcx> for LocalUseMapBuild<'_> {
+impl Visitor<'_> for LocalUseMapBuild<'_> {
  fn visit_local(&mut self, &local: &Local, context: PlaceContext, location: Location) {
  if self.locals_with_use_data[local] {
  match def_use::categorize(context) {

compiler/rustc_borrowck/src/type_check/liveness/mod.rs

@@ -74,7 +74,7 @@ pub(super) fn generate<'mir, 'tcx>(
 // to compute whether a variable `X` is live if that variable contains
 // some region `R` in its type where `R` is not known to outlive a free
 // region (i.e., where `R` may be valid for just a subset of the fn body).
-fn compute_live_locals(
+fn compute_live_locals<'tcx>(
  tcx: TyCtxt<'tcx>,
  free_regions: &FxHashSet<RegionVid>,
  body: &Body<'tcx>,
@@ -104,7 +104,7 @@ fn compute_live_locals(
 /// regions. For these regions, we do not need to compute
 /// liveness, since the outlives constraints will ensure that they
 /// are live over the whole fn body anyhow.
-fn regions_that_outlive_free_regions(
+fn regions_that_outlive_free_regions<'tcx>(
  num_region_vars: usize,
  universal_regions: &UniversalRegions<'tcx>,
  constraint_set: &OutlivesConstraintSet<'tcx>,

compiler/rustc_borrowck/src/type_check/liveness/polonius.rs

@@ -53,7 +53,7 @@ impl UseFactsExtractor<'_> {
  }
 }
 
-impl Visitor<'tcx> for UseFactsExtractor<'_> {
+impl Visitor<'_> for UseFactsExtractor<'_> {
  fn visit_local(&mut self, &local: &Local, context: PlaceContext, location: Location) {
  match def_use::categorize(context) {
  Some(DefUse::Def) => self.insert_def(local, location),
@@ -63,7 +63,7 @@ impl Visitor<'tcx> for UseFactsExtractor<'_> {
  }
  }
 
- fn visit_place(&mut self, place: &Place<'tcx>, context: PlaceContext, location: Location) {
+ fn visit_place(&mut self, place: &Place<'_>, context: PlaceContext, location: Location) {
  self.super_place(place, context, location);
  match context {
  PlaceContext::NonMutatingUse(_) => {
@@ -82,7 +82,7 @@ impl Visitor<'tcx> for UseFactsExtractor<'_> {
  }
 }
 
-pub(super) fn populate_access_facts(
+pub(super) fn populate_access_facts<'tcx>(
  typeck: &mut TypeChecker<'_, 'tcx>,
  body: &Body<'tcx>,
  location_table: &LocationTable,
@@ -123,7 +123,7 @@ pub(super) fn populate_access_facts(
 
 // For every potentially drop()-touched region `region` in `local`'s type
 // (`kind`), emit a Polonius `use_of_var_derefs_origin(local, origin)` fact.
-pub(super) fn add_drop_of_var_derefs_origin(
+pub(super) fn add_drop_of_var_derefs_origin<'tcx>(
  typeck: &mut TypeChecker<'_, 'tcx>,
  local: Local,
  kind: &GenericArg<'tcx>,

compiler/rustc_borrowck/src/type_check/liveness/trace.rs

@@ -34,7 +34,7 @@ use crate::{
 /// DROP-LIVE set are to the liveness sets for regions found in the
 /// `dropck_outlives` result of the variable's type (in particular,
 /// this respects `#[may_dangle]` annotations).
-pub(super) fn trace(
+pub(super) fn trace<'mir, 'tcx>(
  typeck: &mut TypeChecker<'_, 'tcx>,
  body: &Body<'tcx>,
  elements: &Rc<RegionValueElements>,
@@ -119,7 +119,7 @@ struct LivenessResults<'me, 'typeck, 'flow, 'tcx> {
  stack: Vec<PointIndex>,
 }
 
-impl LivenessResults<'me, 'typeck, 'flow, 'tcx> {
+impl<'me, 'typeck, 'flow, 'tcx> LivenessResults<'me, 'typeck, 'flow, 'tcx> {
  fn new(cx: LivenessContext<'me, 'typeck, 'flow, 'tcx>) -> Self {
  let num_points = cx.elements.num_points();
  LivenessResults {
@@ -418,7 +418,7 @@ impl LivenessResults<'me, 'typeck, 'flow, 'tcx> {
  }
 }
 
-impl LivenessContext<'_, '_, '_, 'tcx> {
+impl<'tcx> LivenessContext<'_, '_, '_, 'tcx> {
  /// Returns `true` if the local variable (or some part of it) is initialized at the current
  /// cursor position. Callers should call one of the `seek` methods immediately before to point
  /// the cursor to the desired location.

compiler/rustc_borrowck/src/type_check/mod.rs

@@ -945,7 +945,7 @@ crate struct MirTypeckRegionConstraints<'tcx> {
  crate type_tests: Vec<TypeTest<'tcx>>,
 }
 
-impl MirTypeckRegionConstraints<'tcx> {
+impl<'tcx> MirTypeckRegionConstraints<'tcx> {
  fn placeholder_region(
  &mut self,
  infcx: &InferCtxt<'_, 'tcx>,

compiler/rustc_borrowck/src/type_check/relate_tys.rs

@@ -51,7 +51,7 @@ struct NllTypeRelatingDelegate<'me, 'bccx, 'tcx> {
  universe_info: UniverseInfo<'tcx>,
 }
 
-impl NllTypeRelatingDelegate<'me, 'bccx, 'tcx> {
+impl<'me, 'bccx, 'tcx> NllTypeRelatingDelegate<'me, 'bccx, 'tcx> {
  fn new(
  type_checker: &'me mut TypeChecker<'bccx, 'tcx>,
  locations: Locations,
@@ -62,7 +62,7 @@ impl NllTypeRelatingDelegate<'me, 'bccx, 'tcx> {
  }
 }
 
-impl TypeRelatingDelegate<'tcx> for NllTypeRelatingDelegate<'_, '_, 'tcx> {
+impl<'tcx> TypeRelatingDelegate<'tcx> for NllTypeRelatingDelegate<'_, '_, 'tcx> {
  fn param_env(&self) -> ty::ParamEnv<'tcx> {
  self.type_checker.param_env
  }