Struct EffectiveVisibilitiesVisitor

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pub(crate) struct EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx> {
    r: &'a mut Resolver<'ra, 'tcx>,
    def_effective_visibilities: EffectiveVisibilities,
    import_effective_visibilities: EffectiveVisibilities<Interned<'ra, NameBindingData<'ra>>>,
    current_private_vis: Visibility,
    changed: bool,
}

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§r: &'a mut Resolver<'ra, 'tcx>§def_effective_visibilities: EffectiveVisibilities§import_effective_visibilities: EffectiveVisibilities<Interned<'ra, NameBindingData<'ra>>>

While walking import chains we need to track effective visibilities per-binding, and def id keys in Resolver::effective_visibilities are not enough for that, because multiple bindings can correspond to a single def id in imports. So we keep a separate table.

§current_private_vis: Visibility§changed: bool

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impl<'a, 'ra, 'tcx> EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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pub(crate) fn compute_effective_visibilities<'c>( r: &'a mut Resolver<'ra, 'tcx>, krate: &'c Crate, ) -> FxHashSet<Interned<'ra, NameBindingData<'ra>>>

Fills the Resolver::effective_visibilities table with public & exported items For now, this doesn’t resolve macros (FIXME) and cannot resolve Impl, as we need access to a TyCtxt for that. Returns the set of ambiguous re-exports.

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fn set_bindings_effective_visibilities(&mut self, module_id: LocalDefId)

Update effective visibilities of bindings in the given module, including their whole reexport chains.

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fn effective_vis_or_private( &mut self, parent_id: ParentId<'ra>, ) -> EffectiveVisibility

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fn may_update( &self, nominal_vis: Visibility, parent_id: ParentId<'_>, ) -> Option<Option<Visibility>>

All effective visibilities for a node are larger or equal than private visibility for that node (see check_invariants in middle/privacy.rs). So if either parent or nominal visibility is the same as private visibility, then min(parent_vis, nominal_vis) <= private_vis, and the update logic is guaranteed to not update anything and we can skip it.

We are checking this condition only if the correct value of private visibility is cheaply available, otherwise it doesn’t make sense performance-wise.

None is returned if the update can be skipped, and cheap private visibility is returned otherwise.

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fn update_import( &mut self, binding: Interned<'ra, NameBindingData<'ra>>, parent_id: ParentId<'ra>, )

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fn update_def( &mut self, def_id: LocalDefId, nominal_vis: Visibility, parent_id: ParentId<'ra>, )

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fn update_field(&mut self, def_id: LocalDefId, parent_id: LocalDefId)

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impl<'a, 'ra, 'tcx> Visitor<'a> for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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fn visit_item(&mut self, item: &'a Item)

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type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.
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fn visit_ident(&mut self, _: &'a Ident) -> Self::Result

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fn visit_foreign_mod(&mut self, nm: &'a ForeignMod) -> Self::Result

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fn visit_foreign_item(&mut self, i: &'a Item<ForeignItemKind>) -> Self::Result

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fn visit_local(&mut self, l: &'a Local) -> Self::Result

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fn visit_block(&mut self, b: &'a Block) -> Self::Result

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fn visit_param(&mut self, param: &'a Param) -> Self::Result

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fn visit_arm(&mut self, a: &'a Arm) -> Self::Result

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fn visit_pat(&mut self, p: &'a Pat) -> Self::Result

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fn visit_anon_const(&mut self, c: &'a AnonConst) -> Self::Result

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fn visit_expr(&mut self, ex: &'a Expr) -> Self::Result

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fn visit_method_receiver_expr(&mut self, ex: &'a Expr) -> Self::Result

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.
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fn visit_ty(&mut self, t: &'a Ty) -> Self::Result

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fn visit_ty_pat(&mut self, t: &'a TyPat) -> Self::Result

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fn visit_generic_param(&mut self, param: &'a GenericParam) -> Self::Result

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fn visit_generics(&mut self, g: &'a Generics) -> Self::Result

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fn visit_closure_binder(&mut self, b: &'a ClosureBinder) -> Self::Result

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fn visit_contract(&mut self, c: &'a FnContract) -> Self::Result

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fn visit_where_predicate(&mut self, p: &'a WherePredicate) -> Self::Result

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fn visit_where_predicate_kind( &mut self, k: &'a WherePredicateKind, ) -> Self::Result

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fn visit_fn(&mut self, fk: FnKind<'a>, _: Span, _: NodeId) -> Self::Result

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fn visit_assoc_item( &mut self, i: &'a Item<AssocItemKind>, ctxt: AssocCtxt, ) -> Self::Result

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fn visit_trait_ref(&mut self, t: &'a TraitRef) -> Self::Result

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fn visit_param_bound( &mut self, bounds: &'a GenericBound, _ctxt: BoundKind, ) -> Self::Result

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fn visit_precise_capturing_arg( &mut self, arg: &'a PreciseCapturingArg, ) -> Self::Result

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fn visit_poly_trait_ref(&mut self, t: &'a PolyTraitRef) -> Self::Result

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fn visit_variant_data(&mut self, s: &'a VariantData) -> Self::Result

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fn visit_field_def(&mut self, s: &'a FieldDef) -> Self::Result

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fn visit_variant(&mut self, v: &'a Variant) -> Self::Result

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fn visit_label(&mut self, label: &'a Label) -> Self::Result

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fn visit_lifetime( &mut self, lifetime: &'a Lifetime, _: LifetimeCtxt, ) -> Self::Result

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fn visit_mac_call(&mut self, mac: &'a MacCall) -> Self::Result

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fn visit_id(&mut self, _id: NodeId) -> Self::Result

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fn visit_macro_def(&mut self, macro_def: &'a MacroDef) -> Self::Result

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fn visit_path(&mut self, path: &'a Path) -> Self::Result

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fn visit_use_tree(&mut self, use_tree: &'a UseTree) -> Self::Result

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fn visit_path_segment(&mut self, path_segment: &'a PathSegment) -> Self::Result

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fn visit_generic_args(&mut self, generic_args: &'a GenericArgs) -> Self::Result

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fn visit_generic_arg(&mut self, generic_arg: &'a GenericArg) -> Self::Result

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fn visit_assoc_item_constraint( &mut self, constraint: &'a AssocItemConstraint, ) -> Self::Result

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fn visit_attribute(&mut self, attr: &'a Attribute) -> Self::Result

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fn visit_vis(&mut self, vis: &'a Visibility) -> Self::Result

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fn visit_fn_ret_ty(&mut self, ret_ty: &'a FnRetTy) -> Self::Result

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fn visit_fn_header(&mut self, header: &'a FnHeader) -> Self::Result

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fn visit_expr_field(&mut self, f: &'a ExprField) -> Self::Result

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fn visit_pat_field(&mut self, fp: &'a PatField) -> Self::Result

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fn visit_crate(&mut self, krate: &'a Crate) -> Self::Result

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fn visit_inline_asm(&mut self, asm: &'a InlineAsm) -> Self::Result

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fn visit_format_args(&mut self, fmt: &'a FormatArgs) -> Self::Result

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fn visit_inline_asm_sym(&mut self, sym: &'a InlineAsmSym) -> Self::Result

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fn visit_capture_by(&mut self, capture_by: &'a CaptureBy) -> Self::Result

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fn visit_coroutine_kind( &mut self, coroutine_kind: &'a CoroutineKind, ) -> Self::Result

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fn visit_fn_decl(&mut self, fn_decl: &'a FnDecl) -> Self::Result

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fn visit_qself(&mut self, qs: &'a Option<Box<QSelf>>) -> Self::Result

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fn visit_stmt(&mut self, s: &'a Stmt) -> Self::Result

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fn visit_nested_use_tree( &mut self, use_tree: &'a UseTree, id: NodeId, ) -> Self::Result

Auto Trait Implementations§

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impl<'a, 'ra, 'tcx> !DynSend for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> !DynSync for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> Freeze for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> !RefUnwindSafe for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> !Send for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> !Sync for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> Unpin for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<'a, 'ra, 'tcx> !UnwindSafe for EffectiveVisibilitiesVisitor<'a, 'ra, 'tcx>

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impl<T> Aligned for T

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const ALIGN: Alignment

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type Output = R

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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 128 bytes