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Remove eval_always from check_private_in_public. #116316

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Remove eval_always from check_private_in_public. #116316

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d80a8cd
Remove eval_always from check_private_in_public.
cjgillot Oct 1, 2023
fa8fb0d
Use less HIR in check_private_in_public.
cjgillot Oct 1, 2023
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1 change: 0 additions & 1 deletion compiler/rustc_middle/src/query/mod.rs
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Expand Up @@ -1149,7 +1149,6 @@ rustc_queries! {
desc { "checking effective visibilities" }
}
query check_private_in_public(_: ()) {
eval_always
desc { "checking for private elements in public interfaces" }
}

Expand Down
258 changes: 103 additions & 155 deletions compiler/rustc_privacy/src/lib.rs
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Expand Up @@ -27,7 +27,7 @@ use rustc_data_structures::intern::Interned;
use rustc_hir::def::{DefKind, Res};
use rustc_hir::def_id::{CRATE_DEF_ID, DefId, LocalDefId, LocalModDefId};
use rustc_hir::intravisit::{self, Visitor};
use rustc_hir::{AssocItemKind, ForeignItemKind, ItemId, ItemKind, PatKind};
use rustc_hir::{AssocItemKind, ForeignItemId, ItemId, PatKind};
use rustc_middle::middle::privacy::{EffectiveVisibilities, EffectiveVisibility, Level};
use rustc_middle::query::Providers;
use rustc_middle::ty::print::PrintTraitRefExt as _;
Expand Down Expand Up @@ -587,18 +587,13 @@ impl<'tcx> EmbargoVisitor<'tcx> {

DefKind::Struct | DefKind::Union => {
// While structs and unions have type privacy, their fields do not.
let item = self.tcx.hir().expect_item(def_id);
if let hir::ItemKind::Struct(ref struct_def, _)
| hir::ItemKind::Union(ref struct_def, _) = item.kind
{
for field in struct_def.fields() {
let field_vis = self.tcx.local_visibility(field.def_id);
if field_vis.is_accessible_from(module, self.tcx) {
self.reach(field.def_id, macro_ev).ty();
}
let struct_def = self.tcx.adt_def(def_id);
for field in struct_def.non_enum_variant().fields.iter() {
let def_id = field.did.expect_local();
let field_vis = self.tcx.local_visibility(def_id);
if field_vis.is_accessible_from(module, self.tcx) {
self.reach(def_id, macro_ev).ty();
}
} else {
bug!("item {:?} with DefKind {:?}", item, def_kind);
}
}

Expand Down Expand Up @@ -1459,15 +1454,16 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'_, 'tcx> {
fn check_assoc_item(
&self,
def_id: LocalDefId,
assoc_item_kind: AssocItemKind,
def_kind: DefKind,
vis: ty::Visibility,
effective_vis: Option<EffectiveVisibility>,
) {
let mut check = self.check(def_id, vis, effective_vis);

let (check_ty, is_assoc_ty) = match assoc_item_kind {
AssocItemKind::Const | AssocItemKind::Fn { .. } => (true, false),
AssocItemKind::Type => (self.tcx.defaultness(def_id).has_value(), true),
let (check_ty, is_assoc_ty) = match def_kind {
DefKind::AssocConst | DefKind::AssocFn => (true, false),
DefKind::AssocTy => (self.tcx.defaultness(def_id).has_value(), true),
_ => bug!("wrong def_kind for associated item"),
};

check.in_assoc_ty = is_assoc_ty;
Expand Down Expand Up @@ -1501,164 +1497,116 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'_, 'tcx> {
self.check(def_id, item_visibility, effective_vis).generics().bounds();
}
DefKind::Trait => {
let item = tcx.hir().item(id);
if let hir::ItemKind::Trait(.., trait_item_refs) = item.kind {
self.check_unnameable(item.owner_id.def_id, effective_vis);
self.check_unnameable(def_id, effective_vis);

self.check(item.owner_id.def_id, item_visibility, effective_vis)
.generics()
.predicates();

for trait_item_ref in trait_item_refs {
self.check_assoc_item(
trait_item_ref.id.owner_id.def_id,
trait_item_ref.kind,
item_visibility,
effective_vis,
);
self.check(def_id, item_visibility, effective_vis).generics().predicates();

if let AssocItemKind::Type = trait_item_ref.kind {
self.check(
trait_item_ref.id.owner_id.def_id,
item_visibility,
effective_vis,
)
.bounds();
}
for &assoc_id in tcx.associated_item_def_ids(def_id) {
if tcx.is_impl_trait_in_trait(assoc_id) {
continue;
}
let assoc_id = assoc_id.expect_local();
let def_kind = tcx.def_kind(assoc_id);
self.check_assoc_item(assoc_id, def_kind, item_visibility, effective_vis);
if let DefKind::AssocTy = def_kind {
self.check(assoc_id, item_visibility, effective_vis).bounds();
}
}
}
DefKind::TraitAlias => {
self.check(def_id, item_visibility, effective_vis).generics().predicates();
}
DefKind::Enum => {
let item = tcx.hir().item(id);
if let hir::ItemKind::Enum(ref def, _) = item.kind {
self.check_unnameable(item.owner_id.def_id, effective_vis);

self.check(item.owner_id.def_id, item_visibility, effective_vis)
.generics()
.predicates();

for variant in def.variants {
for field in variant.data.fields() {
self.check(field.def_id, item_visibility, effective_vis).ty();
}
}
}
}
// Subitems of foreign modules have their own publicity.
DefKind::ForeignMod => {
let item = tcx.hir().item(id);
if let hir::ItemKind::ForeignMod { items, .. } = item.kind {
for foreign_item in items {
let foreign_item = tcx.hir().foreign_item(foreign_item.id);

let ev = self.get(foreign_item.owner_id.def_id);
let vis = tcx.local_visibility(foreign_item.owner_id.def_id);

if let ForeignItemKind::Type = foreign_item.kind {
self.check_unnameable(foreign_item.owner_id.def_id, ev);
}
self.check_unnameable(def_id, effective_vis);
self.check(def_id, item_visibility, effective_vis).generics().predicates();

self.check(foreign_item.owner_id.def_id, vis, ev)
.generics()
.predicates()
.ty();
}
let adt = tcx.adt_def(id.owner_id);
for field in adt.all_fields() {
self.check(field.did.expect_local(), item_visibility, effective_vis).ty();
}
}
// Subitems of structs and unions have their own publicity.
DefKind::Struct | DefKind::Union => {
let item = tcx.hir().item(id);
if let hir::ItemKind::Struct(ref struct_def, _)
| hir::ItemKind::Union(ref struct_def, _) = item.kind
{
self.check_unnameable(item.owner_id.def_id, effective_vis);
self.check(item.owner_id.def_id, item_visibility, effective_vis)
.generics()
.predicates();
self.check_unnameable(def_id, effective_vis);
self.check(def_id, item_visibility, effective_vis).generics().predicates();

for field in struct_def.fields() {
let field_visibility = tcx.local_visibility(field.def_id);
let field_ev = self.get(field.def_id);

self.check(
field.def_id,
min(item_visibility, field_visibility, tcx),
field_ev,
)
.ty();
}
let adt = tcx.adt_def(id.owner_id);
for field in adt.all_fields() {
let visibility = min(item_visibility, field.vis.expect_local(), tcx);
let field_ev = self.get(field.did.expect_local());

self.check(field.did.expect_local(), visibility, field_ev).ty();
}
}
// Subitems of foreign modules have their own publicity.
DefKind::ForeignMod => {}
// An inherent impl is public when its type is public
// Subitems of inherent impls have their own publicity.
// A trait impl is public when both its type and its trait are public
// Subitems of trait impls have inherited publicity.
DefKind::Impl { .. } => {
let item = tcx.hir().item(id);
if let hir::ItemKind::Impl(impl_) = item.kind {
let impl_vis = ty::Visibility::of_impl::<false>(
item.owner_id.def_id,
tcx,
&Default::default(),
);

// We are using the non-shallow version here, unlike when building the
// effective visisibilities table to avoid large number of false positives.
// For example in
//
// impl From<Priv> for Pub {
// fn from(_: Priv) -> Pub {...}
// }
//
// lints shouldn't be emitted even if `from` effective visibility
// is larger than `Priv` nominal visibility and if `Priv` can leak
// in some scenarios due to type inference.
let impl_ev = EffectiveVisibility::of_impl::<false>(
item.owner_id.def_id,
tcx,
self.effective_visibilities,
);
DefKind::Impl { of_trait } => {
let impl_vis = ty::Visibility::of_impl::<false>(def_id, tcx, &Default::default());

// check that private components do not appear in the generics or predicates of inherent impls
// this check is intentionally NOT performed for impls of traits, per #90586
if impl_.of_trait.is_none() {
self.check(item.owner_id.def_id, impl_vis, Some(impl_ev))
.generics()
.predicates();
// We are using the non-shallow version here, unlike when building the
// effective visisibilities table to avoid large number of false positives.
// For example in
//
// impl From<Priv> for Pub {
// fn from(_: Priv) -> Pub {...}
// }
//
// lints shouldn't be emitted even if `from` effective visibility
// is larger than `Priv` nominal visibility and if `Priv` can leak
// in some scenarios due to type inference.
let impl_ev =
EffectiveVisibility::of_impl::<false>(def_id, tcx, self.effective_visibilities);

// check that private components do not appear in the generics or predicates of inherent impls
// this check is intentionally NOT performed for impls of traits, per #90586
if !of_trait {
self.check(def_id, impl_vis, Some(impl_ev)).generics().predicates();
}
for &assoc_id in tcx.associated_item_def_ids(def_id) {
if tcx.is_impl_trait_in_trait(assoc_id) {
continue;
}
for impl_item_ref in impl_.items {
let impl_item_vis = if impl_.of_trait.is_none() {
min(
tcx.local_visibility(impl_item_ref.id.owner_id.def_id),
impl_vis,
tcx,
)
} else {
impl_vis
};
let assoc_id = assoc_id.expect_local();
let impl_item_vis = if !of_trait {
min(tcx.local_visibility(assoc_id), impl_vis, tcx)
} else {
impl_vis
};

let impl_item_ev = if impl_.of_trait.is_none() {
self.get(impl_item_ref.id.owner_id.def_id)
.map(|ev| ev.min(impl_ev, self.tcx))
} else {
Some(impl_ev)
};

self.check_assoc_item(
impl_item_ref.id.owner_id.def_id,
impl_item_ref.kind,
impl_item_vis,
impl_item_ev,
);
}
let impl_item_ev = if !of_trait {
self.get(assoc_id).map(|ev| ev.min(impl_ev, self.tcx))
} else {
Some(impl_ev)
};

self.check_assoc_item(
assoc_id,
tcx.def_kind(assoc_id),
impl_item_vis,
impl_item_ev,
);
}
}
_ => {}
}
}

fn check_foreign_item(&mut self, id: ForeignItemId) {
let tcx = self.tcx;
let def_id = id.owner_id.def_id;
let item_visibility = tcx.local_visibility(def_id);
let effective_vis = self.get(def_id);

if let DefKind::ForeignTy = self.tcx.def_kind(def_id) {
self.check_unnameable(def_id, effective_vis);
}

self.check(def_id, item_visibility, effective_vis).generics().predicates().ty();
}
}

pub fn provide(providers: &mut Providers) {
Expand Down Expand Up @@ -1687,16 +1635,12 @@ fn check_mod_privacy(tcx: TyCtxt<'_>, module_def_id: LocalModDefId) {
if let Some(body_id) = tcx.hir().maybe_body_owned_by(def_id) {
visitor.visit_nested_body(body_id.id());
}
}

for id in module.free_items() {
if let ItemKind::Impl(i) = tcx.hir().item(id).kind {
if let Some(item) = i.of_trait {
let trait_ref = tcx.impl_trait_ref(id.owner_id.def_id).unwrap();
let trait_ref = trait_ref.instantiate_identity();
visitor.span = item.path.span;
visitor.visit_def_id(trait_ref.def_id, "trait", &trait_ref.print_only_trait_path());
}
if let DefKind::Impl { of_trait: true } = tcx.def_kind(def_id) {
let trait_ref = tcx.impl_trait_ref(def_id).unwrap();
let trait_ref = trait_ref.instantiate_identity();
visitor.span = tcx.hir().expect_item(def_id).expect_impl().of_trait.unwrap().path.span;
visitor.visit_def_id(trait_ref.def_id, "trait", &trait_ref.print_only_trait_path());
}
}
}
Expand Down Expand Up @@ -1787,7 +1731,11 @@ fn check_private_in_public(tcx: TyCtxt<'_>, (): ()) {
// Check for private types in public interfaces.
let mut checker = PrivateItemsInPublicInterfacesChecker { tcx, effective_visibilities };

for id in tcx.hir().items() {
let crate_items = tcx.hir_crate_items(());
for id in crate_items.free_items() {
checker.check_item(id);
}
for id in crate_items.foreign_items() {
checker.check_foreign_item(id);
}
}
22 changes: 11 additions & 11 deletions tests/ui/privacy/associated-item-privacy-trait.stderr
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Original file line number Diff line number Diff line change
Expand Up @@ -75,6 +75,17 @@ LL | priv_trait::mac!();
|
= note: this error originates in the macro `priv_trait::mac` (in Nightly builds, run with -Z macro-backtrace for more info)

error: trait `PrivTr` is private
--> $DIR/associated-item-privacy-trait.rs:29:14
|
LL | impl PrivTr for u8 {}
| ^^^^^^ private trait
...
LL | priv_trait::mac!();
| ------------------ in this macro invocation
|
= note: this error originates in the macro `priv_trait::mac` (in Nightly builds, run with -Z macro-backtrace for more info)

error: type `priv_signature::Priv` is private
--> $DIR/associated-item-privacy-trait.rs:46:21
|
Expand Down Expand Up @@ -317,16 +328,5 @@ LL | priv_parent_substs::mac!();
|
= note: this error originates in the macro `priv_parent_substs::mac` (in Nightly builds, run with -Z macro-backtrace for more info)

error: trait `PrivTr` is private
--> $DIR/associated-item-privacy-trait.rs:29:14
|
LL | impl PrivTr for u8 {}
| ^^^^^^ private trait
...
LL | priv_trait::mac!();
| ------------------ in this macro invocation
|
= note: this error originates in the macro `priv_trait::mac` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 30 previous errors

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