Reduce visibilities.

compiler/rustc_borrowck/src/borrow_set.rs

@@ -20,18 +20,18 @@ pub struct BorrowSet<'tcx> {
     /// by the `Location` of the assignment statement in which it
     /// appears on the right hand side. Thus the location is the map
     /// key, and its position in the map corresponds to `BorrowIndex`.
-    pub location_map: FxIndexMap<Location, BorrowData<'tcx>>,
+    pub(crate) location_map: FxIndexMap<Location, BorrowData<'tcx>>,
 
     /// Locations which activate borrows.
     /// NOTE: a given location may activate more than one borrow in the future
     /// when more general two-phase borrow support is introduced, but for now we
     /// only need to store one borrow index.
-    pub activation_map: FxIndexMap<Location, Vec<BorrowIndex>>,
+    pub(crate) activation_map: FxIndexMap<Location, Vec<BorrowIndex>>,
 
     /// Map from local to all the borrows on that local.
-    pub local_map: FxIndexMap<mir::Local, FxIndexSet<BorrowIndex>>,
+    pub(crate) local_map: FxIndexMap<mir::Local, FxIndexSet<BorrowIndex>>,
 
-    pub locals_state_at_exit: LocalsStateAtExit,
+    pub(crate) locals_state_at_exit: LocalsStateAtExit,
 }
 
 impl<'tcx> Index<BorrowIndex> for BorrowSet<'tcx> {
@@ -45,7 +45,7 @@ impl<'tcx> Index<BorrowIndex> for BorrowSet<'tcx> {
 /// Location where a two-phase borrow is activated, if a borrow
 /// is in fact a two-phase borrow.
 #[derive(Copy, Clone, PartialEq, Eq, Debug)]
-pub enum TwoPhaseActivation {
+pub(crate) enum TwoPhaseActivation {
     NotTwoPhase,
     NotActivated,
     ActivatedAt(Location),
@@ -55,17 +55,17 @@ pub enum TwoPhaseActivation {
 pub struct BorrowData<'tcx> {
     /// Location where the borrow reservation starts.
     /// In many cases, this will be equal to the activation location but not always.
-    pub reserve_location: Location,
+    pub(crate) reserve_location: Location,
     /// Location where the borrow is activated.
-    pub activation_location: TwoPhaseActivation,
+    pub(crate) activation_location: TwoPhaseActivation,
     /// What kind of borrow this is
-    pub kind: mir::BorrowKind,
+    pub(crate) kind: mir::BorrowKind,
     /// The region for which this borrow is live
-    pub region: RegionVid,
+    pub(crate) region: RegionVid,
     /// Place from which we are borrowing
-    pub borrowed_place: mir::Place<'tcx>,
+    pub(crate) borrowed_place: mir::Place<'tcx>,
     /// Place to which the borrow was stored
-    pub assigned_place: mir::Place<'tcx>,
+    pub(crate) assigned_place: mir::Place<'tcx>,
 }
 
 impl<'tcx> fmt::Display for BorrowData<'tcx> {
@@ -120,7 +120,7 @@ impl LocalsStateAtExit {
 }
 
 impl<'tcx> BorrowSet<'tcx> {
-    pub fn build(
+    pub(crate) fn build(
         tcx: TyCtxt<'tcx>,
         body: &Body<'tcx>,
         locals_are_invalidated_at_exit: bool,
@@ -156,7 +156,7 @@ impl<'tcx> BorrowSet<'tcx> {
         self.activation_map.get(&location).map_or(&[], |activations| &activations[..])
     }
 
-    pub fn len(&self) -> usize {
+    pub(crate) fn len(&self) -> usize {
         self.location_map.len()
     }
 

compiler/rustc_borrowck/src/constraints/mod.rs

@@ -210,7 +210,7 @@ impl<'tcx> fmt::Debug for OutlivesConstraint<'tcx> {
 
 rustc_index::newtype_index! {
     #[debug_format = "OutlivesConstraintIndex({})"]
-    pub struct OutlivesConstraintIndex {}
+    pub(crate) struct OutlivesConstraintIndex {}
 }
 
 rustc_index::newtype_index! {

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -2733,7 +2733,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
     /// cannot borrow `a.u` (via `a.u.z.c`) as immutable because it is also borrowed as
     /// mutable (via `a.u.s.b`) [E0502]
     /// ```
-    pub(crate) fn describe_place_for_conflicting_borrow(
+    fn describe_place_for_conflicting_borrow(
         &self,
         first_borrowed_place: Place<'tcx>,
         second_borrowed_place: Place<'tcx>,

compiler/rustc_borrowck/src/lib.rs

@@ -55,7 +55,7 @@ use self::path_utils::*;
 use self::prefixes::PrefixSet;
 use crate::session_diagnostics::VarNeedNotMut;
 
-pub mod borrow_set;
+mod borrow_set;
 mod borrowck_errors;
 mod constraints;
 mod dataflow;
@@ -434,7 +434,7 @@ fn do_mir_borrowck<'tcx>(
     (result, body_with_facts)
 }
 
-pub struct BorrowckInferCtxt<'tcx> {
+pub(crate) struct BorrowckInferCtxt<'tcx> {
     pub(crate) infcx: InferCtxt<'tcx>,
     pub(crate) reg_var_to_origin: RefCell<FxIndexMap<ty::RegionVid, RegionCtxt>>,
 }

compiler/rustc_borrowck/src/region_infer/mod.rs

@@ -553,7 +553,7 @@ impl<'tcx> RegionInferenceContext<'tcx> {
     }
 
     /// Returns an iterator over all the region indices.
-    pub fn regions(&self) -> impl Iterator<Item = RegionVid> + 'tcx {
+    pub(crate) fn regions(&self) -> impl Iterator<Item = RegionVid> + 'tcx {
         self.definitions.indices()
     }
 
@@ -561,12 +561,14 @@ impl<'tcx> RegionInferenceContext<'tcx> {
     /// corresponding index.
     ///
     /// (Panics if `r` is not a registered universal region.)
-    pub fn to_region_vid(&self, r: ty::Region<'tcx>) -> RegionVid {
+    pub(crate) fn to_region_vid(&self, r: ty::Region<'tcx>) -> RegionVid {
         self.universal_regions.to_region_vid(r)
     }
 
     /// Returns an iterator over all the outlives constraints.
-    pub fn outlives_constraints(&self) -> impl Iterator<Item = OutlivesConstraint<'tcx>> + '_ {
+    pub(crate) fn outlives_constraints(
+        &self,
+    ) -> impl Iterator<Item = OutlivesConstraint<'tcx>> + '_ {
         self.constraints.outlives().iter().copied()
     }
 

compiler/rustc_borrowck/src/region_infer/values.rs

@@ -15,7 +15,7 @@ use crate::BorrowIndex;
 rustc_index::newtype_index! {
     /// A single integer representing a `ty::Placeholder`.
     #[debug_format = "PlaceholderIndex({})"]
-    pub struct PlaceholderIndex {}
+    pub(crate) struct PlaceholderIndex {}
 }
 
 /// An individual element in a region value -- the value of a