Add warn(unreachable_pub) to rustc_hir_analysis.

compiler/rustc_hir_analysis/src/bounds.rs

@@ -26,13 +26,13 @@ use rustc_span::Span;
 /// Our representation is a bit mixed here -- in some cases, we
 /// include the self type (e.g., `trait_bounds`) but in others we do not
 #[derive(Default, PartialEq, Eq, Clone, Debug)]
-pub struct Bounds<'tcx> {
+pub(crate) struct Bounds<'tcx> {
     clauses: Vec<(ty::Clause<'tcx>, Span)>,
     effects_min_tys: FxIndexMap<Ty<'tcx>, Span>,
 }
 
 impl<'tcx> Bounds<'tcx> {
-    pub fn push_region_bound(
+    pub(crate) fn push_region_bound(
         &mut self,
         tcx: TyCtxt<'tcx>,
         region: ty::PolyTypeOutlivesPredicate<'tcx>,
@@ -42,7 +42,7 @@ impl<'tcx> Bounds<'tcx> {
             .push((region.map_bound(|p| ty::ClauseKind::TypeOutlives(p)).upcast(tcx), span));
     }
 
-    pub fn push_trait_bound(
+    pub(crate) fn push_trait_bound(
         &mut self,
         tcx: TyCtxt<'tcx>,
         defining_def_id: DefId,
@@ -154,7 +154,7 @@ impl<'tcx> Bounds<'tcx> {
         self.clauses.push((bound_trait_ref.rebind(new_trait_ref).upcast(tcx), span));
     }
 
-    pub fn push_projection_bound(
+    pub(crate) fn push_projection_bound(
         &mut self,
         tcx: TyCtxt<'tcx>,
         projection: ty::PolyProjectionPredicate<'tcx>,
@@ -166,14 +166,14 @@ impl<'tcx> Bounds<'tcx> {
         ));
     }
 
-    pub fn push_sized(&mut self, tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, span: Span) {
+    pub(crate) fn push_sized(&mut self, tcx: TyCtxt<'tcx>, ty: Ty<'tcx>, span: Span) {
         let sized_def_id = tcx.require_lang_item(LangItem::Sized, Some(span));
         let trait_ref = ty::TraitRef::new(tcx, sized_def_id, [ty]);
         // Preferable to put this obligation first, since we report better errors for sized ambiguity.
         self.clauses.insert(0, (trait_ref.upcast(tcx), span));
     }
 
-    pub fn clauses(
+    pub(crate) fn clauses(
         &self,
         // FIXME(effects): remove tcx
         _tcx: TyCtxt<'tcx>,
@@ -181,7 +181,7 @@ impl<'tcx> Bounds<'tcx> {
         self.clauses.iter().cloned()
     }
 
-    pub fn effects_min_tys(&self) -> impl Iterator<Item = Ty<'tcx>> + '_ {
+    pub(crate) fn effects_min_tys(&self) -> impl Iterator<Item = Ty<'tcx>> + '_ {
         self.effects_min_tys.keys().copied()
     }
 }

compiler/rustc_hir_analysis/src/check/check.rs

@@ -1053,7 +1053,7 @@ fn check_impl_items_against_trait<'tcx>(
     }
 }
 
-pub fn check_simd(tcx: TyCtxt<'_>, sp: Span, def_id: LocalDefId) {
+fn check_simd(tcx: TyCtxt<'_>, sp: Span, def_id: LocalDefId) {
     let t = tcx.type_of(def_id).instantiate_identity();
     if let ty::Adt(def, args) = t.kind()
         && def.is_struct()

compiler/rustc_hir_analysis/src/check/errs.rs

@@ -6,7 +6,7 @@ use rustc_span::Span;
 use crate::errors;
 
 /// Check for shared or mutable references of `static mut` inside expression
-pub fn maybe_expr_static_mut(tcx: TyCtxt<'_>, expr: hir::Expr<'_>) {
+pub(crate) fn maybe_expr_static_mut(tcx: TyCtxt<'_>, expr: hir::Expr<'_>) {
     let span = expr.span;
     let hir_id = expr.hir_id;
     if let hir::ExprKind::AddrOf(borrow_kind, m, expr) = expr.kind
@@ -26,7 +26,7 @@ pub fn maybe_expr_static_mut(tcx: TyCtxt<'_>, expr: hir::Expr<'_>) {
 }
 
 /// Check for shared or mutable references of `static mut` inside statement
-pub fn maybe_stmt_static_mut(tcx: TyCtxt<'_>, stmt: hir::Stmt<'_>) {
+pub(crate) fn maybe_stmt_static_mut(tcx: TyCtxt<'_>, stmt: hir::Stmt<'_>) {
     if let hir::StmtKind::Let(loc) = stmt.kind
         && let hir::PatKind::Binding(ba, _, _, _) = loc.pat.kind
         && let hir::ByRef::Yes(rmutbl) = ba.0

compiler/rustc_hir_analysis/src/check/region.rs

@@ -22,7 +22,7 @@ use rustc_span::source_map;
 use super::errs::{maybe_expr_static_mut, maybe_stmt_static_mut};
 
 #[derive(Debug, Copy, Clone)]
-pub struct Context {
+struct Context {
     /// The scope that contains any new variables declared, plus its depth in
     /// the scope tree.
     var_parent: Option<(Scope, ScopeDepth)>,
@@ -893,7 +893,7 @@ impl<'tcx> Visitor<'tcx> for RegionResolutionVisitor<'tcx> {
 /// re-use in incremental scenarios. We may sometimes need to rerun the
 /// type checker even when the HIR hasn't changed, and in those cases
 /// we can avoid reconstructing the region scope tree.
-pub fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
+pub(crate) fn region_scope_tree(tcx: TyCtxt<'_>, def_id: DefId) -> &ScopeTree {
     let typeck_root_def_id = tcx.typeck_root_def_id(def_id);
     if typeck_root_def_id != def_id {
         return tcx.region_scope_tree(typeck_root_def_id);

compiler/rustc_hir_analysis/src/check_unused.rs

@@ -5,7 +5,7 @@ use rustc_middle::query::Providers;
 use rustc_middle::ty::TyCtxt;
 use rustc_session::lint;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { check_unused_traits, ..*providers };
 }
 

compiler/rustc_hir_analysis/src/coherence/builtin.rs

@@ -332,7 +332,7 @@ fn visit_implementation_of_dispatch_from_dyn(checker: &Checker<'_>) -> Result<()
     }
 }
 
-pub fn coerce_unsized_info<'tcx>(
+pub(crate) fn coerce_unsized_info<'tcx>(
     tcx: TyCtxt<'tcx>,
     impl_did: LocalDefId,
 ) -> Result<CoerceUnsizedInfo, ErrorGuaranteed> {

compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs

@@ -19,7 +19,7 @@ use rustc_span::ErrorGuaranteed;
 use crate::errors;
 
 /// On-demand query: yields a map containing all types mapped to their inherent impls.
-pub fn crate_inherent_impls(
+pub(crate) fn crate_inherent_impls(
     tcx: TyCtxt<'_>,
     (): (),
 ) -> Result<&'_ CrateInherentImpls, ErrorGuaranteed> {
@@ -32,7 +32,7 @@ pub fn crate_inherent_impls(
     Ok(tcx.arena.alloc(collect.impls_map))
 }
 
-pub fn crate_incoherent_impls(
+pub(crate) fn crate_incoherent_impls(
     tcx: TyCtxt<'_>,
     simp: SimplifiedType,
 ) -> Result<&[DefId], ErrorGuaranteed> {
@@ -43,7 +43,10 @@ pub fn crate_incoherent_impls(
 }
 
 /// On-demand query: yields a vector of the inherent impls for a specific type.
-pub fn inherent_impls(tcx: TyCtxt<'_>, ty_def_id: LocalDefId) -> Result<&[DefId], ErrorGuaranteed> {
+pub(crate) fn inherent_impls(
+    tcx: TyCtxt<'_>,
+    ty_def_id: LocalDefId,
+) -> Result<&[DefId], ErrorGuaranteed> {
     let crate_map = tcx.crate_inherent_impls(())?;
     Ok(match crate_map.inherent_impls.get(&ty_def_id) {
         Some(v) => &v[..],

compiler/rustc_hir_analysis/src/coherence/inherent_impls_overlap.rs

@@ -11,7 +11,10 @@ use rustc_span::{ErrorGuaranteed, Symbol};
 use rustc_trait_selection::traits::{self, SkipLeakCheck};
 use smallvec::SmallVec;
 
-pub fn crate_inherent_impls_overlap_check(tcx: TyCtxt<'_>, (): ()) -> Result<(), ErrorGuaranteed> {
+pub(crate) fn crate_inherent_impls_overlap_check(
+    tcx: TyCtxt<'_>,
+    (): (),
+) -> Result<(), ErrorGuaranteed> {
     let mut inherent_overlap_checker = InherentOverlapChecker { tcx };
     let mut res = Ok(());
     for id in tcx.hir().items() {

compiler/rustc_hir_analysis/src/coherence/mod.rs

@@ -123,7 +123,7 @@ fn enforce_empty_impls_for_marker_traits(
     .emit())
 }
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     use self::builtin::coerce_unsized_info;
     use self::inherent_impls::{crate_incoherent_impls, crate_inherent_impls, inherent_impls};
     use self::inherent_impls_overlap::crate_inherent_impls_overlap_check;

compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs

@@ -2071,7 +2071,7 @@ fn is_late_bound_map(
     }
 }
 
-pub fn deny_non_region_late_bound(
+fn deny_non_region_late_bound(
     tcx: TyCtxt<'_>,
     bound_vars: &mut FxIndexMap<LocalDefId, ResolvedArg>,
     where_: &str,

compiler/rustc_hir_analysis/src/collect/type_of.rs

@@ -725,7 +725,7 @@ fn check_feature_inherent_assoc_ty(tcx: TyCtxt<'_>, span: Span) {
     }
 }
 
-pub fn type_alias_is_lazy<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> bool {
+pub(crate) fn type_alias_is_lazy<'tcx>(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> bool {
     use hir::intravisit::Visitor;
     if tcx.features().lazy_type_alias {
         return true;

compiler/rustc_hir_analysis/src/constrained_generic_params.rs

@@ -6,7 +6,7 @@ use rustc_span::Span;
 use rustc_type_ir::fold::TypeFoldable;
 
 #[derive(Clone, PartialEq, Eq, Hash, Debug)]
-pub struct Parameter(pub u32);
+pub(crate) struct Parameter(pub u32);
 
 impl From<ty::ParamTy> for Parameter {
     fn from(param: ty::ParamTy) -> Self {
@@ -27,7 +27,7 @@ impl From<ty::ParamConst> for Parameter {
 }
 
 /// Returns the set of parameters constrained by the impl header.
-pub fn parameters_for_impl<'tcx>(
+pub(crate) fn parameters_for_impl<'tcx>(
     tcx: TyCtxt<'tcx>,
     impl_self_ty: Ty<'tcx>,
     impl_trait_ref: Option<ty::TraitRef<'tcx>>,
@@ -44,7 +44,7 @@ pub fn parameters_for_impl<'tcx>(
 /// uniquely determined by `value` (see RFC 447). If it is true, return the list
 /// of parameters whose values are needed in order to constrain `value` - these
 /// differ, with the latter being a superset, in the presence of projections.
-pub fn parameters_for<'tcx>(
+pub(crate) fn parameters_for<'tcx>(
     tcx: TyCtxt<'tcx>,
     value: impl TypeFoldable<TyCtxt<'tcx>>,
     include_nonconstraining: bool,
@@ -102,7 +102,7 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ParameterCollector {
     }
 }
 
-pub fn identify_constrained_generic_params<'tcx>(
+pub(crate) fn identify_constrained_generic_params<'tcx>(
     tcx: TyCtxt<'tcx>,
     predicates: ty::GenericPredicates<'tcx>,
     impl_trait_ref: Option<ty::TraitRef<'tcx>>,
@@ -156,7 +156,7 @@ pub fn identify_constrained_generic_params<'tcx>(
 /// which is determined by 1, which requires `U`, that is determined
 /// by 0. I should probably pick a less tangled example, but I can't
 /// think of any.
-pub fn setup_constraining_predicates<'tcx>(
+pub(crate) fn setup_constraining_predicates<'tcx>(
     tcx: TyCtxt<'tcx>,
     predicates: &mut [(ty::Clause<'tcx>, Span)],
     impl_trait_ref: Option<ty::TraitRef<'tcx>>,

compiler/rustc_hir_analysis/src/errors.rs

@@ -11,15 +11,15 @@ use rustc_span::{Span, Symbol};
 
 use crate::fluent_generated as fluent;
 mod pattern_types;
-pub use pattern_types::*;
-pub mod wrong_number_of_generic_args;
+pub(crate) use pattern_types::*;
+pub(crate) mod wrong_number_of_generic_args;
 
 mod precise_captures;
 pub(crate) use precise_captures::*;
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_ambiguous_assoc_item)]
-pub struct AmbiguousAssocItem<'a> {
+pub(crate) struct AmbiguousAssocItem<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -30,7 +30,7 @@ pub struct AmbiguousAssocItem<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_assoc_kind_mismatch)]
-pub struct AssocKindMismatch {
+pub(crate) struct AssocKindMismatch {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -52,7 +52,7 @@ pub struct AssocKindMismatch {
     hir_analysis_assoc_kind_mismatch_wrap_in_braces_sugg,
     applicability = "maybe-incorrect"
 )]
-pub struct AssocKindMismatchWrapInBracesSugg {
+pub(crate) struct AssocKindMismatchWrapInBracesSugg {
     #[suggestion_part(code = "{{ ")]
     pub lo: Span,
     #[suggestion_part(code = " }}")]
@@ -61,7 +61,7 @@ pub struct AssocKindMismatchWrapInBracesSugg {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_assoc_item_is_private, code = E0624)]
-pub struct AssocItemIsPrivate {
+pub(crate) struct AssocItemIsPrivate {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -73,7 +73,7 @@ pub struct AssocItemIsPrivate {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_assoc_item_not_found, code = E0220)]
-pub struct AssocItemNotFound<'a> {
+pub(crate) struct AssocItemNotFound<'a> {
     #[primary_span]
     pub span: Span,
     pub assoc_name: Ident,
@@ -86,7 +86,7 @@ pub struct AssocItemNotFound<'a> {
 }
 
 #[derive(Subdiagnostic)]
-pub enum AssocItemNotFoundLabel<'a> {
+pub(crate) enum AssocItemNotFoundLabel<'a> {
     #[label(hir_analysis_assoc_item_not_found_label)]
     NotFound {
         #[primary_span]
@@ -105,7 +105,7 @@ pub enum AssocItemNotFoundLabel<'a> {
 
 #[derive(Subdiagnostic)]
 
-pub enum AssocItemNotFoundSugg<'a> {
+pub(crate) enum AssocItemNotFoundSugg<'a> {
     #[suggestion(
         hir_analysis_assoc_item_not_found_similar_sugg,
         code = "{suggested_name}",
@@ -162,7 +162,7 @@ pub enum AssocItemNotFoundSugg<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_unrecognized_atomic_operation, code = E0092)]
-pub struct UnrecognizedAtomicOperation<'a> {
+pub(crate) struct UnrecognizedAtomicOperation<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -171,7 +171,7 @@ pub struct UnrecognizedAtomicOperation<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_wrong_number_of_generic_arguments_to_intrinsic, code = E0094)]
-pub struct WrongNumberOfGenericArgumentsToIntrinsic<'a> {
+pub(crate) struct WrongNumberOfGenericArgumentsToIntrinsic<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -183,7 +183,7 @@ pub struct WrongNumberOfGenericArgumentsToIntrinsic<'a> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_unrecognized_intrinsic_function, code = E0093)]
 #[help]
-pub struct UnrecognizedIntrinsicFunction {
+pub(crate) struct UnrecognizedIntrinsicFunction {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -192,7 +192,7 @@ pub struct UnrecognizedIntrinsicFunction {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_lifetimes_or_bounds_mismatch_on_trait, code = E0195)]
-pub struct LifetimesOrBoundsMismatchOnTrait {
+pub(crate) struct LifetimesOrBoundsMismatchOnTrait {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -208,14 +208,14 @@ pub struct LifetimesOrBoundsMismatchOnTrait {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_drop_impl_on_wrong_item, code = E0120)]
-pub struct DropImplOnWrongItem {
+pub(crate) struct DropImplOnWrongItem {
     #[primary_span]
     #[label]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
-pub enum FieldAlreadyDeclared {
+pub(crate) enum FieldAlreadyDeclared {
     #[diag(hir_analysis_field_already_declared, code = E0124)]
     NotNested {
         field_name: Symbol,
@@ -272,14 +272,14 @@ pub enum FieldAlreadyDeclared {
 
 #[derive(Subdiagnostic)]
 #[help(hir_analysis_field_already_declared_nested_help)]
-pub struct FieldAlreadyDeclaredNestedHelp {
+pub(crate) struct FieldAlreadyDeclaredNestedHelp {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_copy_impl_on_type_with_dtor, code = E0184)]
-pub struct CopyImplOnTypeWithDtor {
+pub(crate) struct CopyImplOnTypeWithDtor {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -287,14 +287,14 @@ pub struct CopyImplOnTypeWithDtor {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_multiple_relaxed_default_bounds, code = E0203)]
-pub struct MultipleRelaxedDefaultBounds {
+pub(crate) struct MultipleRelaxedDefaultBounds {
     #[primary_span]
     pub spans: Vec<Span>,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_copy_impl_on_non_adt, code = E0206)]
-pub struct CopyImplOnNonAdt {
+pub(crate) struct CopyImplOnNonAdt {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -302,7 +302,7 @@ pub struct CopyImplOnNonAdt {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_const_param_ty_impl_on_unsized)]
-pub struct ConstParamTyImplOnUnsized {
+pub(crate) struct ConstParamTyImplOnUnsized {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -310,7 +310,7 @@ pub struct ConstParamTyImplOnUnsized {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_const_param_ty_impl_on_non_adt)]
-pub struct ConstParamTyImplOnNonAdt {
+pub(crate) struct ConstParamTyImplOnNonAdt {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -318,7 +318,7 @@ pub struct ConstParamTyImplOnNonAdt {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_trait_object_declared_with_no_traits, code = E0224)]
-pub struct TraitObjectDeclaredWithNoTraits {
+pub(crate) struct TraitObjectDeclaredWithNoTraits {
     #[primary_span]
     pub span: Span,
     #[label(hir_analysis_alias_span)]
@@ -327,14 +327,14 @@ pub struct TraitObjectDeclaredWithNoTraits {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_ambiguous_lifetime_bound, code = E0227)]
-pub struct AmbiguousLifetimeBound {
+pub(crate) struct AmbiguousLifetimeBound {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_assoc_item_constraints_not_allowed_here, code = E0229)]
-pub struct AssocItemConstraintsNotAllowedHere {
+pub(crate) struct AssocItemConstraintsNotAllowedHere {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -383,7 +383,7 @@ pub(crate) struct EscapingBoundVarInTyOfAssocConstBinding<'tcx> {
 
 #[derive(Subdiagnostic)]
 #[help(hir_analysis_parenthesized_fn_trait_expansion)]
-pub struct ParenthesizedFnTraitExpansion {
+pub(crate) struct ParenthesizedFnTraitExpansion {
     #[primary_span]
     pub span: Span,
 
@@ -392,7 +392,7 @@ pub struct ParenthesizedFnTraitExpansion {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_typeof_reserved_keyword_used, code = E0516)]
-pub struct TypeofReservedKeywordUsed<'tcx> {
+pub(crate) struct TypeofReservedKeywordUsed<'tcx> {
     pub ty: Ty<'tcx>,
     #[primary_span]
     #[label]
@@ -403,7 +403,7 @@ pub struct TypeofReservedKeywordUsed<'tcx> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_value_of_associated_struct_already_specified, code = E0719)]
-pub struct ValueOfAssociatedStructAlreadySpecified {
+pub(crate) struct ValueOfAssociatedStructAlreadySpecified {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -416,7 +416,7 @@ pub struct ValueOfAssociatedStructAlreadySpecified {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_unconstrained_opaque_type)]
 #[note]
-pub struct UnconstrainedOpaqueType {
+pub(crate) struct UnconstrainedOpaqueType {
     #[primary_span]
     pub span: Span,
     pub name: Symbol,
@@ -426,7 +426,7 @@ pub struct UnconstrainedOpaqueType {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_tait_forward_compat)]
 #[note]
-pub struct TaitForwardCompat {
+pub(crate) struct TaitForwardCompat {
     #[primary_span]
     pub span: Span,
     #[note]
@@ -436,7 +436,7 @@ pub struct TaitForwardCompat {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_tait_forward_compat2)]
 #[note]
-pub struct TaitForwardCompat2 {
+pub(crate) struct TaitForwardCompat2 {
     #[primary_span]
     pub span: Span,
     #[note(hir_analysis_opaque)]
@@ -444,7 +444,7 @@ pub struct TaitForwardCompat2 {
     pub opaque_type: String,
 }
 
-pub struct MissingTypeParams {
+pub(crate) struct MissingTypeParams {
     pub span: Span,
     pub def_span: Span,
     pub span_snippet: Option<String>,
@@ -512,7 +512,7 @@ impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for MissingTypeParams {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_manual_implementation, code = E0183)]
 #[help]
-pub struct ManualImplementation {
+pub(crate) struct ManualImplementation {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -521,14 +521,14 @@ pub struct ManualImplementation {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_generic_args_on_overridden_impl)]
-pub struct GenericArgsOnOverriddenImpl {
+pub(crate) struct GenericArgsOnOverriddenImpl {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_const_impl_for_non_const_trait)]
-pub struct ConstImplForNonConstTrait {
+pub(crate) struct ConstImplForNonConstTrait {
     #[primary_span]
     pub trait_ref_span: Span,
     pub trait_name: String,
@@ -542,7 +542,7 @@ pub struct ConstImplForNonConstTrait {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_const_bound_for_non_const_trait)]
-pub struct ConstBoundForNonConstTrait {
+pub(crate) struct ConstBoundForNonConstTrait {
     #[primary_span]
     pub span: Span,
     pub modifier: &'static str,
@@ -550,7 +550,7 @@ pub struct ConstBoundForNonConstTrait {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_self_in_impl_self)]
-pub struct SelfInImplSelf {
+pub(crate) struct SelfInImplSelf {
     #[primary_span]
     pub span: MultiSpan,
     #[note]
@@ -567,7 +567,7 @@ pub(crate) struct LinkageType {
 #[derive(Diagnostic)]
 #[help]
 #[diag(hir_analysis_auto_deref_reached_recursion_limit, code = E0055)]
-pub struct AutoDerefReachedRecursionLimit<'a> {
+pub(crate) struct AutoDerefReachedRecursionLimit<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -736,7 +736,7 @@ pub(crate) struct InvalidUnionField {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_invalid_unnamed_field_ty)]
-pub struct InvalidUnnamedFieldTy {
+pub(crate) struct InvalidUnnamedFieldTy {
     #[primary_span]
     pub span: Span,
 }
@@ -894,7 +894,7 @@ pub(crate) struct SIMDFFIHighlyExperimental {
 }
 
 #[derive(Diagnostic)]
-pub enum ImplNotMarkedDefault {
+pub(crate) enum ImplNotMarkedDefault {
     #[diag(hir_analysis_impl_not_marked_default, code = E0520)]
     #[note]
     Ok {
@@ -1137,7 +1137,7 @@ pub(crate) enum LateBoundInApit {
 #[derive(LintDiagnostic)]
 #[diag(hir_analysis_unused_associated_type_bounds)]
 #[note]
-pub struct UnusedAssociatedTypeBounds {
+pub(crate) struct UnusedAssociatedTypeBounds {
     #[suggestion(code = "")]
     pub span: Span,
 }
@@ -1162,7 +1162,7 @@ pub(crate) struct ReturnPositionImplTraitInTraitRefined<'tcx> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_ty_outside, code = E0390)]
 #[help]
-pub struct InherentTyOutside {
+pub(crate) struct InherentTyOutside {
     #[primary_span]
     #[help(hir_analysis_span_help)]
     pub span: Span,
@@ -1170,7 +1170,7 @@ pub struct InherentTyOutside {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0378)]
-pub struct DispatchFromDynCoercion<'a> {
+pub(crate) struct DispatchFromDynCoercion<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1182,7 +1182,7 @@ pub struct DispatchFromDynCoercion<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_dispatch_from_dyn_repr, code = E0378)]
-pub struct DispatchFromDynRepr {
+pub(crate) struct DispatchFromDynRepr {
     #[primary_span]
     pub span: Span,
 }
@@ -1190,7 +1190,7 @@ pub struct DispatchFromDynRepr {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_ty_outside_relevant, code = E0390)]
 #[help]
-pub struct InherentTyOutsideRelevant {
+pub(crate) struct InherentTyOutsideRelevant {
     #[primary_span]
     pub span: Span,
     #[help(hir_analysis_span_help)]
@@ -1200,7 +1200,7 @@ pub struct InherentTyOutsideRelevant {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_ty_outside_new, code = E0116)]
 #[note]
-pub struct InherentTyOutsideNew {
+pub(crate) struct InherentTyOutsideNew {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1209,7 +1209,7 @@ pub struct InherentTyOutsideNew {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_ty_outside_primitive, code = E0390)]
 #[help]
-pub struct InherentTyOutsidePrimitive {
+pub(crate) struct InherentTyOutsidePrimitive {
     #[primary_span]
     pub span: Span,
     #[help(hir_analysis_span_help)]
@@ -1219,7 +1219,7 @@ pub struct InherentTyOutsidePrimitive {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_primitive_ty, code = E0390)]
 #[help]
-pub struct InherentPrimitiveTy<'a> {
+pub(crate) struct InherentPrimitiveTy<'a> {
     #[primary_span]
     pub span: Span,
     #[subdiagnostic]
@@ -1228,14 +1228,14 @@ pub struct InherentPrimitiveTy<'a> {
 
 #[derive(Subdiagnostic)]
 #[note(hir_analysis_inherent_primitive_ty_note)]
-pub struct InherentPrimitiveTyNote<'a> {
+pub(crate) struct InherentPrimitiveTyNote<'a> {
     pub subty: Ty<'a>,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_dyn, code = E0785)]
 #[note]
-pub struct InherentDyn {
+pub(crate) struct InherentDyn {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1244,7 +1244,7 @@ pub struct InherentDyn {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_inherent_nominal, code = E0118)]
 #[note]
-pub struct InherentNominal {
+pub(crate) struct InherentNominal {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1253,7 +1253,7 @@ pub struct InherentNominal {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_dispatch_from_dyn_zst, code = E0378)]
 #[note]
-pub struct DispatchFromDynZST<'a> {
+pub(crate) struct DispatchFromDynZST<'a> {
     #[primary_span]
     pub span: Span,
     pub name: Symbol,
@@ -1262,7 +1262,7 @@ pub struct DispatchFromDynZST<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0378)]
-pub struct DispatchFromDynSingle<'a> {
+pub(crate) struct DispatchFromDynSingle<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1273,7 +1273,7 @@ pub struct DispatchFromDynSingle<'a> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_dispatch_from_dyn_multi, code = E0378)]
 #[note]
-pub struct DispatchFromDynMulti {
+pub(crate) struct DispatchFromDynMulti {
     #[primary_span]
     pub span: Span,
     #[note(hir_analysis_coercions_note)]
@@ -1284,7 +1284,7 @@ pub struct DispatchFromDynMulti {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0376)]
-pub struct DispatchFromDynStruct<'a> {
+pub(crate) struct DispatchFromDynStruct<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1292,7 +1292,7 @@ pub struct DispatchFromDynStruct<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0377)]
-pub struct DispatchFromDynSame<'a> {
+pub(crate) struct DispatchFromDynSame<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1304,7 +1304,7 @@ pub struct DispatchFromDynSame<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0374)]
-pub struct CoerceUnsizedOneField<'a> {
+pub(crate) struct CoerceUnsizedOneField<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1315,7 +1315,7 @@ pub struct CoerceUnsizedOneField<'a> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_multi, code = E0375)]
 #[note]
-pub struct CoerceUnsizedMulti {
+pub(crate) struct CoerceUnsizedMulti {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1327,7 +1327,7 @@ pub struct CoerceUnsizedMulti {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_coerce_unsized_may, code = E0378)]
-pub struct CoerceUnsizedMay<'a> {
+pub(crate) struct CoerceUnsizedMay<'a> {
     #[primary_span]
     pub span: Span,
     pub trait_name: &'a str,
@@ -1335,7 +1335,7 @@ pub struct CoerceUnsizedMay<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_trait_cannot_impl_for_ty, code = E0204)]
-pub struct TraitCannotImplForTy {
+pub(crate) struct TraitCannotImplForTy {
     #[primary_span]
     pub span: Span,
     pub trait_name: String,
@@ -1347,7 +1347,7 @@ pub struct TraitCannotImplForTy {
 
 #[derive(Subdiagnostic)]
 #[note(hir_analysis_requires_note)]
-pub struct ImplForTyRequires {
+pub(crate) struct ImplForTyRequires {
     #[primary_span]
     pub span: MultiSpan,
     pub error_predicate: String,
@@ -1358,7 +1358,7 @@ pub struct ImplForTyRequires {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_traits_with_defualt_impl, code = E0321)]
 #[note]
-pub struct TraitsWithDefaultImpl<'a> {
+pub(crate) struct TraitsWithDefaultImpl<'a> {
     #[primary_span]
     pub span: Span,
     pub traits: String,
@@ -1368,7 +1368,7 @@ pub struct TraitsWithDefaultImpl<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_cross_crate_traits, code = E0321)]
-pub struct CrossCrateTraits<'a> {
+pub(crate) struct CrossCrateTraits<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1378,7 +1378,7 @@ pub struct CrossCrateTraits<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_cross_crate_traits_defined, code = E0321)]
-pub struct CrossCrateTraitsDefined {
+pub(crate) struct CrossCrateTraitsDefined {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1390,7 +1390,7 @@ pub struct CrossCrateTraitsDefined {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_ty_param_first_local, code = E0210)]
 #[note]
-pub struct TyParamFirstLocal<'tcx> {
+pub(crate) struct TyParamFirstLocal<'tcx> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1403,7 +1403,7 @@ pub struct TyParamFirstLocal<'tcx> {
 #[derive(LintDiagnostic)]
 #[diag(hir_analysis_ty_param_first_local, code = E0210)]
 #[note]
-pub struct TyParamFirstLocalLint<'tcx> {
+pub(crate) struct TyParamFirstLocalLint<'tcx> {
     #[label]
     pub span: Span,
     #[note(hir_analysis_case_note)]
@@ -1415,7 +1415,7 @@ pub struct TyParamFirstLocalLint<'tcx> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_ty_param_some, code = E0210)]
 #[note]
-pub struct TyParamSome {
+pub(crate) struct TyParamSome {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1427,7 +1427,7 @@ pub struct TyParamSome {
 #[derive(LintDiagnostic)]
 #[diag(hir_analysis_ty_param_some, code = E0210)]
 #[note]
-pub struct TyParamSomeLint {
+pub(crate) struct TyParamSomeLint {
     #[label]
     pub span: Span,
     #[note(hir_analysis_only_note)]
@@ -1436,7 +1436,7 @@ pub struct TyParamSomeLint {
 }
 
 #[derive(Diagnostic)]
-pub enum OnlyCurrentTraits {
+pub(crate) enum OnlyCurrentTraits {
     #[diag(hir_analysis_only_current_traits_outside, code = E0117)]
     Outside {
         #[primary_span]
@@ -1465,20 +1465,20 @@ pub enum OnlyCurrentTraits {
 
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_opaque)]
-pub struct OnlyCurrentTraitsOpaque {
+pub(crate) struct OnlyCurrentTraitsOpaque {
     #[primary_span]
     pub span: Span,
 }
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_foreign)]
-pub struct OnlyCurrentTraitsForeign {
+pub(crate) struct OnlyCurrentTraitsForeign {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_name)]
-pub struct OnlyCurrentTraitsName<'a> {
+pub(crate) struct OnlyCurrentTraitsName<'a> {
     #[primary_span]
     pub span: Span,
     pub name: &'a str,
@@ -1486,7 +1486,7 @@ pub struct OnlyCurrentTraitsName<'a> {
 
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_pointer)]
-pub struct OnlyCurrentTraitsPointer<'a> {
+pub(crate) struct OnlyCurrentTraitsPointer<'a> {
     #[primary_span]
     pub span: Span,
     pub pointer: Ty<'a>,
@@ -1494,7 +1494,7 @@ pub struct OnlyCurrentTraitsPointer<'a> {
 
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_ty)]
-pub struct OnlyCurrentTraitsTy<'a> {
+pub(crate) struct OnlyCurrentTraitsTy<'a> {
     #[primary_span]
     pub span: Span,
     pub ty: Ty<'a>,
@@ -1502,7 +1502,7 @@ pub struct OnlyCurrentTraitsTy<'a> {
 
 #[derive(Subdiagnostic)]
 #[label(hir_analysis_only_current_traits_adt)]
-pub struct OnlyCurrentTraitsAdt {
+pub(crate) struct OnlyCurrentTraitsAdt {
     #[primary_span]
     pub span: Span,
     pub name: String,
@@ -1513,11 +1513,11 @@ pub struct OnlyCurrentTraitsAdt {
     hir_analysis_only_current_traits_pointer_sugg,
     applicability = "maybe-incorrect"
 )]
-pub struct OnlyCurrentTraitsPointerSugg<'a> {
+pub(crate) struct OnlyCurrentTraitsPointerSugg<'a> {
     #[suggestion_part(code = "WrapperType")]
     pub wrapper_span: Span,
     #[suggestion_part(code = "struct WrapperType(*{mut_key}{ptr_ty});\n\n")]
-    pub struct_span: Span,
+    pub(crate) struct_span: Span,
     pub mut_key: &'a str,
     pub ptr_ty: Ty<'a>,
 }
@@ -1525,7 +1525,7 @@ pub struct OnlyCurrentTraitsPointerSugg<'a> {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_static_mut_ref, code = E0796)]
 #[note]
-pub struct StaticMutRef<'a> {
+pub(crate) struct StaticMutRef<'a> {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1535,7 +1535,7 @@ pub struct StaticMutRef<'a> {
 }
 
 #[derive(Subdiagnostic)]
-pub enum MutRefSugg {
+pub(crate) enum MutRefSugg {
     #[multipart_suggestion(
         hir_analysis_suggestion,
         style = "verbose",
@@ -1565,7 +1565,7 @@ pub enum MutRefSugg {
 #[diag(hir_analysis_static_mut_refs_lint)]
 #[note]
 #[note(hir_analysis_why_note)]
-pub struct RefOfMutStatic<'a> {
+pub(crate) struct RefOfMutStatic<'a> {
     #[label]
     pub span: Span,
     #[subdiagnostic]
@@ -1575,7 +1575,7 @@ pub struct RefOfMutStatic<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_not_supported_delegation)]
-pub struct UnsupportedDelegation<'a> {
+pub(crate) struct UnsupportedDelegation<'a> {
     #[primary_span]
     pub span: Span,
     pub descr: &'a str,
@@ -1585,7 +1585,7 @@ pub struct UnsupportedDelegation<'a> {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_method_should_return_future)]
-pub struct MethodShouldReturnFuture {
+pub(crate) struct MethodShouldReturnFuture {
     #[primary_span]
     pub span: Span,
     pub method_name: Symbol,
@@ -1649,7 +1649,7 @@ pub(crate) struct UnconstrainedGenericParameter {
 }
 
 #[derive(Diagnostic)]
-pub enum UnnamedFieldsRepr<'a> {
+pub(crate) enum UnnamedFieldsRepr<'a> {
     #[diag(hir_analysis_unnamed_fields_repr_missing_repr_c)]
     MissingReprC {
         #[primary_span]
@@ -1678,14 +1678,14 @@ pub enum UnnamedFieldsRepr<'a> {
 
 #[derive(Subdiagnostic)]
 #[note(hir_analysis_unnamed_fields_repr_field_defined)]
-pub struct UnnamedFieldsReprFieldDefined {
+pub(crate) struct UnnamedFieldsReprFieldDefined {
     #[primary_span]
     pub span: Span,
 }
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_opaque_captures_higher_ranked_lifetime, code = E0657)]
-pub struct OpaqueCapturesHigherRankedLifetime {
+pub(crate) struct OpaqueCapturesHigherRankedLifetime {
     #[primary_span]
     pub span: Span,
     #[label]
@@ -1697,7 +1697,7 @@ pub struct OpaqueCapturesHigherRankedLifetime {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_pattern_type_non_const_range)]
-pub struct NonConstRange {
+pub(crate) struct NonConstRange {
     #[primary_span]
     pub span: Span,
 }
@@ -1706,7 +1706,7 @@ pub struct NonConstRange {
 #[diag(hir_analysis_invalid_receiver_ty, code = E0307)]
 #[note]
 #[help(hir_analysis_invalid_receiver_ty_help)]
-pub struct InvalidReceiverTy<'tcx> {
+pub(crate) struct InvalidReceiverTy<'tcx> {
     #[primary_span]
     pub span: Span,
     pub receiver_ty: Ty<'tcx>,
@@ -1716,12 +1716,12 @@ pub struct InvalidReceiverTy<'tcx> {
 #[diag(hir_analysis_effects_without_next_solver)]
 #[note]
 #[help]
-pub struct EffectsWithoutNextSolver;
+pub(crate) struct EffectsWithoutNextSolver;
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_cmse_call_inputs_stack_spill, code = E0798)]
 #[note]
-pub struct CmseCallInputsStackSpill {
+pub(crate) struct CmseCallInputsStackSpill {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1732,7 +1732,7 @@ pub struct CmseCallInputsStackSpill {
 #[diag(hir_analysis_cmse_call_output_stack_spill, code = E0798)]
 #[note(hir_analysis_note1)]
 #[note(hir_analysis_note2)]
-pub struct CmseCallOutputStackSpill {
+pub(crate) struct CmseCallOutputStackSpill {
     #[primary_span]
     #[label]
     pub span: Span,
@@ -1740,7 +1740,7 @@ pub struct CmseCallOutputStackSpill {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_cmse_call_generic, code = E0798)]
-pub struct CmseCallGeneric {
+pub(crate) struct CmseCallGeneric {
     #[primary_span]
     pub span: Span,
 }

compiler/rustc_hir_analysis/src/errors/pattern_types.rs

@@ -3,7 +3,7 @@ use rustc_span::Span;
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_pattern_type_wild_pat)]
-pub struct WildPatTy {
+pub(crate) struct WildPatTy {
     #[primary_span]
     pub span: Span,
 }

compiler/rustc_hir_analysis/src/errors/precise_captures.rs

@@ -4,7 +4,7 @@ use rustc_span::{Span, Symbol};
 #[derive(Diagnostic)]
 #[diag(hir_analysis_param_not_captured)]
 #[note]
-pub struct ParamNotCaptured {
+pub(crate) struct ParamNotCaptured {
     #[primary_span]
     pub opaque_span: Span,
     #[label]
@@ -15,7 +15,7 @@ pub struct ParamNotCaptured {
 #[derive(Diagnostic)]
 #[diag(hir_analysis_self_ty_not_captured)]
 #[note]
-pub struct SelfTyNotCaptured {
+pub(crate) struct SelfTyNotCaptured {
     #[primary_span]
     pub opaque_span: Span,
     #[label]
@@ -24,7 +24,7 @@ pub struct SelfTyNotCaptured {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_lifetime_not_captured)]
-pub struct LifetimeNotCaptured {
+pub(crate) struct LifetimeNotCaptured {
     #[primary_span]
     pub use_span: Span,
     #[label(hir_analysis_param_label)]
@@ -35,7 +35,7 @@ pub struct LifetimeNotCaptured {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_bad_precise_capture)]
-pub struct BadPreciseCapture {
+pub(crate) struct BadPreciseCapture {
     #[primary_span]
     pub span: Span,
     pub kind: &'static str,
@@ -44,7 +44,7 @@ pub struct BadPreciseCapture {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_precise_capture_self_alias)]
-pub struct PreciseCaptureSelfAlias {
+pub(crate) struct PreciseCaptureSelfAlias {
     #[primary_span]
     pub span: Span,
     #[label]
@@ -54,7 +54,7 @@ pub struct PreciseCaptureSelfAlias {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_duplicate_precise_capture)]
-pub struct DuplicatePreciseCapture {
+pub(crate) struct DuplicatePreciseCapture {
     #[primary_span]
     pub first_span: Span,
     pub name: Symbol,
@@ -64,7 +64,7 @@ pub struct DuplicatePreciseCapture {
 
 #[derive(Diagnostic)]
 #[diag(hir_analysis_lifetime_must_be_first)]
-pub struct LifetimesMustBeFirst {
+pub(crate) struct LifetimesMustBeFirst {
     #[primary_span]
     pub lifetime_span: Span,
     pub name: Symbol,

compiler/rustc_hir_analysis/src/errors/wrong_number_of_generic_args.rs

@@ -8,7 +8,7 @@ use rustc_span::def_id::DefId;
 use GenericArgsInfo::*;
 
 /// Handles the `wrong number of type / lifetime / ... arguments` family of error messages.
-pub struct WrongNumberOfGenericArgs<'a, 'tcx> {
+pub(crate) struct WrongNumberOfGenericArgs<'a, 'tcx> {
     pub(crate) tcx: TyCtxt<'tcx>,
 
     pub(crate) angle_brackets: AngleBrackets,
@@ -49,7 +49,7 @@ pub(crate) enum AngleBrackets {
 
 // Information about the kind of arguments that are either missing or are unexpected
 #[derive(Debug)]
-pub enum GenericArgsInfo {
+pub(crate) enum GenericArgsInfo {
     MissingLifetimes {
         num_missing_args: usize,
     },
@@ -87,7 +87,7 @@ pub enum GenericArgsInfo {
 }
 
 impl<'a, 'tcx> WrongNumberOfGenericArgs<'a, 'tcx> {
-    pub fn new(
+    pub(crate) fn new(
         tcx: TyCtxt<'tcx>,
         gen_args_info: GenericArgsInfo,
         path_segment: &'a hir::PathSegment<'_>,

compiler/rustc_hir_analysis/src/hir_ty_lowering/cmse.rs

@@ -11,7 +11,7 @@ use crate::errors;
 /// Check conditions on inputs and outputs that the cmse ABIs impose: arguments and results MUST be
 /// returned via registers (i.e. MUST NOT spill to the stack). LLVM will also validate these
 /// conditions, but by checking them here rustc can emit nicer error messages.
-pub fn validate_cmse_abi<'tcx>(
+pub(crate) fn validate_cmse_abi<'tcx>(
     tcx: TyCtxt<'tcx>,
     dcx: DiagCtxtHandle<'_>,
     hir_id: HirId,

compiler/rustc_hir_analysis/src/hir_wf_check.rs

@@ -11,7 +11,7 @@ use rustc_trait_selection::traits::{self, ObligationCtxt};
 
 use crate::collect::ItemCtxt;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { diagnostic_hir_wf_check, ..*providers };
 }
 

compiler/rustc_hir_analysis/src/impl_wf_check.rs

@@ -53,7 +53,10 @@ mod min_specialization;
 /// impl<'a> Trait<Foo> for Bar { type X = &'a i32; }
 /// //   ^ 'a is unused and appears in assoc type, error
 /// ```
-pub fn check_impl_wf(tcx: TyCtxt<'_>, impl_def_id: LocalDefId) -> Result<(), ErrorGuaranteed> {
+pub(crate) fn check_impl_wf(
+    tcx: TyCtxt<'_>,
+    impl_def_id: LocalDefId,
+) -> Result<(), ErrorGuaranteed> {
     let min_specialization = tcx.features().min_specialization;
     let mut res = Ok(());
     debug_assert_matches!(tcx.def_kind(impl_def_id), DefKind::Impl { .. });

compiler/rustc_hir_analysis/src/lib.rs

@@ -72,6 +72,7 @@ This API is completely unstable and subject to change.
 #![feature(slice_partition_dedup)]
 #![feature(try_blocks)]
 #![feature(unwrap_infallible)]
+#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 #[macro_use]

compiler/rustc_hir_analysis/src/outlives/explicit.rs

@@ -5,12 +5,12 @@ use rustc_middle::ty::{self, OutlivesPredicate, TyCtxt};
 use super::utils::*;
 
 #[derive(Debug)]
-pub struct ExplicitPredicatesMap<'tcx> {
+pub(crate) struct ExplicitPredicatesMap<'tcx> {
     map: FxIndexMap<DefId, ty::EarlyBinder<'tcx, RequiredPredicates<'tcx>>>,
 }
 
 impl<'tcx> ExplicitPredicatesMap<'tcx> {
-    pub fn new() -> ExplicitPredicatesMap<'tcx> {
+    pub(crate) fn new() -> ExplicitPredicatesMap<'tcx> {
         ExplicitPredicatesMap { map: FxIndexMap::default() }
     }
 

compiler/rustc_hir_analysis/src/outlives/mod.rs

@@ -9,7 +9,7 @@ mod explicit;
 mod implicit_infer;
 mod utils;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { inferred_outlives_of, inferred_outlives_crate, ..*providers };
 }
 

compiler/rustc_hir_analysis/src/variance/constraints.rs

@@ -12,7 +12,7 @@ use rustc_middle::{bug, span_bug};
 use super::terms::VarianceTerm::*;
 use super::terms::*;
 
-pub struct ConstraintContext<'a, 'tcx> {
+pub(crate) struct ConstraintContext<'a, 'tcx> {
     pub terms_cx: TermsContext<'a, 'tcx>,
 
     // These are pointers to common `ConstantTerm` instances
@@ -27,7 +27,7 @@ pub struct ConstraintContext<'a, 'tcx> {
 /// Declares that the variable `decl_id` appears in a location with
 /// variance `variance`.
 #[derive(Copy, Clone)]
-pub struct Constraint<'a> {
+pub(crate) struct Constraint<'a> {
     pub inferred: InferredIndex,
     pub variance: &'a VarianceTerm<'a>,
 }
@@ -41,11 +41,11 @@ pub struct Constraint<'a> {
 /// ```
 /// then while we are visiting `Bar<T>`, the `CurrentItem` would have
 /// the `DefId` and the start of `Foo`'s inferreds.
-pub struct CurrentItem {
+struct CurrentItem {
     inferred_start: InferredIndex,
 }
 
-pub fn add_constraints_from_crate<'a, 'tcx>(
+pub(crate) fn add_constraints_from_crate<'a, 'tcx>(
     terms_cx: TermsContext<'a, 'tcx>,
 ) -> ConstraintContext<'a, 'tcx> {
     let tcx = terms_cx.tcx;

compiler/rustc_hir_analysis/src/variance/mod.rs

@@ -28,7 +28,7 @@ pub(crate) mod dump;
 /// Code for transforming variances.
 mod xform;
 
-pub fn provide(providers: &mut Providers) {
+pub(crate) fn provide(providers: &mut Providers) {
     *providers = Providers { variances_of, crate_variances, ..*providers };
 }
 

compiler/rustc_hir_analysis/src/variance/solve.rs

@@ -21,7 +21,7 @@ struct SolveContext<'a, 'tcx> {
     solutions: Vec<ty::Variance>,
 }
 
-pub fn solve_constraints<'tcx>(
+pub(crate) fn solve_constraints<'tcx>(
     constraints_cx: ConstraintContext<'_, 'tcx>,
 ) -> ty::CrateVariancesMap<'tcx> {
     let ConstraintContext { terms_cx, constraints, .. } = constraints_cx;

compiler/rustc_hir_analysis/src/variance/terms.rs

@@ -18,13 +18,13 @@ use rustc_middle::ty::{self, TyCtxt};
 
 use self::VarianceTerm::*;
 
-pub type VarianceTermPtr<'a> = &'a VarianceTerm<'a>;
+pub(crate) type VarianceTermPtr<'a> = &'a VarianceTerm<'a>;
 
 #[derive(Copy, Clone, Debug)]
-pub struct InferredIndex(pub usize);
+pub(crate) struct InferredIndex(pub usize);
 
 #[derive(Copy, Clone)]
-pub enum VarianceTerm<'a> {
+pub(crate) enum VarianceTerm<'a> {
     ConstantTerm(ty::Variance),
     TransformTerm(VarianceTermPtr<'a>, VarianceTermPtr<'a>),
     InferredTerm(InferredIndex),
@@ -45,7 +45,7 @@ impl<'a> fmt::Debug for VarianceTerm<'a> {
 
 /// The first pass over the crate simply builds up the set of inferreds.
 
-pub struct TermsContext<'a, 'tcx> {
+pub(crate) struct TermsContext<'a, 'tcx> {
     pub tcx: TyCtxt<'tcx>,
     pub arena: &'a DroplessArena,
 
@@ -62,7 +62,7 @@ pub struct TermsContext<'a, 'tcx> {
     pub inferred_terms: Vec<VarianceTermPtr<'a>>,
 }
 
-pub fn determine_parameters_to_be_inferred<'a, 'tcx>(
+pub(crate) fn determine_parameters_to_be_inferred<'a, 'tcx>(
     tcx: TyCtxt<'tcx>,
     arena: &'a DroplessArena,
 ) -> TermsContext<'a, 'tcx> {

compiler/rustc_hir_analysis/src/variance/xform.rs

@@ -1,6 +1,6 @@
 use rustc_middle::ty;
 
-pub fn glb(v1: ty::Variance, v2: ty::Variance) -> ty::Variance {
+pub(crate) fn glb(v1: ty::Variance, v2: ty::Variance) -> ty::Variance {
     // Greatest lower bound of the variance lattice as
     // defined in The Paper:
     //