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Store associated item defaultness in impl_defaultness.

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This commit is contained in:
Camille GILLOT 2022-03-12 19:36:11 +01:00
parent c9e134e1b6
commit 110f0656cb
25 changed files with 89 additions and 107 deletions
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5
compiler/rustc_ast_lowering/src/index.rs
View File

@ -323,7 +323,7 @@ impl<'a, 'hir> Visitor<'hir> for NodeCollector<'a, 'hir> {
fn visit_trait_item_ref(&mut self, ii: &'hir TraitItemRef) {
// Do not visit the duplicate information in TraitItemRef. We want to
// map the actual nodes, not the duplicate ones in the *Ref.
let TraitItemRef { id, ident: _, kind: _, span: _, defaultness: _ } = *ii;
let TraitItemRef { id, ident: _, kind: _, span: _ } = *ii;
self.visit_nested_trait_item(id);
}
@ -331,8 +331,7 @@ impl<'a, 'hir> Visitor<'hir> for NodeCollector<'a, 'hir> {
fn visit_impl_item_ref(&mut self, ii: &'hir ImplItemRef) {
// Do not visit the duplicate information in ImplItemRef. We want to
// map the actual nodes, not the duplicate ones in the *Ref.
let ImplItemRef { id, ident: _, kind: _, span: _, defaultness: _, trait_item_def_id: _ } =
*ii;
let ImplItemRef { id, ident: _, kind: _, span: _, trait_item_def_id: _ } = *ii;
self.visit_nested_impl_item(id);
}

37
compiler/rustc_ast_lowering/src/item.rs
View File

@ -755,17 +755,17 @@ impl<'hir> LoweringContext<'_, 'hir> {
let hir_id = self.lower_node_id(i.id);
let trait_item_def_id = hir_id.expect_owner();
let (generics, kind) = match i.kind {
let (generics, kind, has_default) = match i.kind {
AssocItemKind::Const(_, ref ty, ref default) => {
let ty = self.lower_ty(ty, ImplTraitContext::Disallowed(ImplTraitPosition::Type));
let body = default.as_ref().map(|x| self.lower_const_body(i.span, Some(x)));
(hir::Generics::empty(), hir::TraitItemKind::Const(ty, body))
(hir::Generics::empty(), hir::TraitItemKind::Const(ty, body), body.is_some())
}
AssocItemKind::Fn(box Fn { ref sig, ref generics, body: None, .. }) => {
let names = self.lower_fn_params_to_names(&sig.decl);
let (generics, sig) =
self.lower_method_sig(generics, sig, i.id, FnDeclKind::Trait, None);
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Required(names)))
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Required(names)), false)
}
AssocItemKind::Fn(box Fn { ref sig, ref generics, body: Some(ref body), .. }) => {
let asyncness = sig.header.asyncness;
@ -778,7 +778,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
FnDeclKind::Trait,
asyncness.opt_return_id(),
);
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Provided(body_id)))
(generics, hir::TraitItemKind::Fn(sig, hir::TraitFn::Provided(body_id)), true)
}
AssocItemKind::TyAlias(box TyAlias {
ref generics,
@ -789,7 +789,7 @@ impl<'hir> LoweringContext<'_, 'hir> {
}) => {
let mut generics = generics.clone();
add_ty_alias_where_clause(&mut generics, where_clauses, false);
self.lower_generics(
let (generics, kind) = self.lower_generics(
&generics,
i.id,
ImplTraitContext::Disallowed(ImplTraitPosition::Generic),
@ -805,7 +805,8 @@ impl<'hir> LoweringContext<'_, 'hir> {
ty,
)
},
)
);
(generics, kind, ty.is_some())
}
AssocItemKind::MacCall(..) => panic!("macro item shouldn't exist at this point"),
};
@ -817,28 +818,25 @@ impl<'hir> LoweringContext<'_, 'hir> {
generics,
kind,
span: self.lower_span(i.span),
defaultness: hir::Defaultness::Default { has_value: has_default },
};
self.arena.alloc(item)
}
fn lower_trait_item_ref(&mut self, i: &AssocItem) -> hir::TraitItemRef {
let (kind, has_default) = match &i.kind {
AssocItemKind::Const(_, _, default) => (hir::AssocItemKind::Const, default.is_some()),
AssocItemKind::TyAlias(box TyAlias { ty, .. }) => {
(hir::AssocItemKind::Type, ty.is_some())
}
AssocItemKind::Fn(box Fn { sig, body, .. }) => {
(hir::AssocItemKind::Fn { has_self: sig.decl.has_self() }, body.is_some())
let kind = match &i.kind {
AssocItemKind::Const(..) => hir::AssocItemKind::Const,
AssocItemKind::TyAlias(..) => hir::AssocItemKind::Type,
AssocItemKind::Fn(box Fn { sig, .. }) => {
hir::AssocItemKind::Fn { has_self: sig.decl.has_self() }
}
AssocItemKind::MacCall(..) => unimplemented!(),
};
let id = hir::TraitItemId { def_id: self.local_def_id(i.id) };
let defaultness = hir::Defaultness::Default { has_value: has_default };
hir::TraitItemRef {
id,
ident: self.lower_ident(i.ident),
span: self.lower_span(i.span),
defaultness,
kind,
}
}
@ -849,6 +847,10 @@ impl<'hir> LoweringContext<'_, 'hir> {
}
fn lower_impl_item(&mut self, i: &AssocItem) -> &'hir hir::ImplItem<'hir> {
// Since `default impl` is not yet implemented, this is always true in impls.
let has_value = true;
let (defaultness, _) = self.lower_defaultness(i.kind.defaultness(), has_value);
let (generics, kind) = match &i.kind {
AssocItemKind::Const(_, ty, expr) => {
let ty = self.lower_ty(ty, ImplTraitContext::Disallowed(ImplTraitPosition::Type));
@ -903,19 +905,16 @@ impl<'hir> LoweringContext<'_, 'hir> {
kind,
vis_span: self.lower_span(i.vis.span),
span: self.lower_span(i.span),
defaultness,
};
self.arena.alloc(item)
}
fn lower_impl_item_ref(&mut self, i: &AssocItem) -> hir::ImplItemRef {
// Since `default impl` is not yet implemented, this is always true in impls.
let has_value = true;
let (defaultness, _) = self.lower_defaultness(i.kind.defaultness(), has_value);
hir::ImplItemRef {
id: hir::ImplItemId { def_id: self.local_def_id(i.id) },
ident: self.lower_ident(i.ident),
span: self.lower_span(i.span),
defaultness,
kind: match &i.kind {
AssocItemKind::Const(..) => hir::AssocItemKind::Const,
AssocItemKind::TyAlias(..) => hir::AssocItemKind::Type,

8
compiler/rustc_hir/src/hir.rs
View File

@ -2222,6 +2222,7 @@ pub struct TraitItem<'hir> {
pub generics: &'hir Generics<'hir>,
pub kind: TraitItemKind<'hir>,
pub span: Span,
pub defaultness: Defaultness,
}
impl TraitItem<'_> {
@ -2281,6 +2282,7 @@ pub struct ImplItem<'hir> {
pub def_id: LocalDefId,
pub generics: &'hir Generics<'hir>,
pub kind: ImplItemKind<'hir>,
pub defaultness: Defaultness,
pub span: Span,
pub vis_span: Span,
}
@ -3083,7 +3085,6 @@ pub struct TraitItemRef {
pub ident: Ident,
pub kind: AssocItemKind,
pub span: Span,
pub defaultness: Defaultness,
}
/// A reference from an impl to one of its associated items. This
@ -3098,7 +3099,6 @@ pub struct ImplItemRef {
pub ident: Ident,
pub kind: AssocItemKind,
pub span: Span,
pub defaultness: Defaultness,
/// When we are in a trait impl, link to the trait-item's id.
pub trait_item_def_id: Option<DefId>,
}
@ -3496,11 +3496,11 @@ mod size_asserts {
rustc_data_structures::static_assert_size!(ForeignItem<'static>, 72);
rustc_data_structures::static_assert_size!(GenericBound<'_>, 48);
rustc_data_structures::static_assert_size!(Generics<'static>, 56);
rustc_data_structures::static_assert_size!(ImplItem<'static>, 80);
rustc_data_structures::static_assert_size!(ImplItem<'static>, 88);
rustc_data_structures::static_assert_size!(Impl<'static>, 80);
rustc_data_structures::static_assert_size!(Item<'static>, 80);
rustc_data_structures::static_assert_size!(Pat<'static>, 88);
rustc_data_structures::static_assert_size!(QPath<'static>, 24);
rustc_data_structures::static_assert_size!(TraitItem<'static>, 88);
rustc_data_structures::static_assert_size!(TraitItem<'static>, 96);
rustc_data_structures::static_assert_size!(Ty<'static>, 72);
}

19
compiler/rustc_hir/src/intravisit.rs
View File

@ -948,6 +948,7 @@ pub fn walk_fn<'v, V: Visitor<'v>>(
pub fn walk_trait_item<'v, V: Visitor<'v>>(visitor: &mut V, trait_item: &'v TraitItem<'v>) {
visitor.visit_ident(trait_item.ident);
visitor.visit_generics(&trait_item.generics);
visitor.visit_defaultness(&trait_item.defaultness);
match trait_item.kind {
TraitItemKind::Const(ref ty, default) => {
visitor.visit_id(trait_item.hir_id());
@ -980,19 +981,27 @@ pub fn walk_trait_item<'v, V: Visitor<'v>>(visitor: &mut V, trait_item: &'v Trai
pub fn walk_trait_item_ref<'v, V: Visitor<'v>>(visitor: &mut V, trait_item_ref: &'v TraitItemRef) {
// N.B., deliberately force a compilation error if/when new fields are added.
let TraitItemRef { id, ident, ref kind, span: _, ref defaultness } = *trait_item_ref;
let TraitItemRef { id, ident, ref kind, span: _ } = *trait_item_ref;
visitor.visit_nested_trait_item(id);
visitor.visit_ident(ident);
visitor.visit_associated_item_kind(kind);
visitor.visit_defaultness(defaultness);
}
pub fn walk_impl_item<'v, V: Visitor<'v>>(visitor: &mut V, impl_item: &'v ImplItem<'v>) {
// N.B., deliberately force a compilation error if/when new fields are added.
let ImplItem { def_id: _, ident, ref generics, ref kind, span: _, vis_span: _ } = *impl_item;
let ImplItem {
def_id: _,
ident,
ref generics,
ref kind,
ref defaultness,
span: _,
vis_span: _,
} = *impl_item;
visitor.visit_ident(ident);
visitor.visit_generics(generics);
visitor.visit_defaultness(defaultness);
match *kind {
ImplItemKind::Const(ref ty, body) => {
visitor.visit_id(impl_item.hir_id());
@ -1027,12 +1036,10 @@ pub fn walk_foreign_item_ref<'v, V: Visitor<'v>>(
pub fn walk_impl_item_ref<'v, V: Visitor<'v>>(visitor: &mut V, impl_item_ref: &'v ImplItemRef) {
// N.B., deliberately force a compilation error if/when new fields are added.
let ImplItemRef { id, ident, ref kind, span: _, ref defaultness, trait_item_def_id: _ } =
*impl_item_ref;
let ImplItemRef { id, ident, ref kind, span: _, trait_item_def_id: _ } = *impl_item_ref;
visitor.visit_nested_impl_item(id);
visitor.visit_ident(ident);
visitor.visit_associated_item_kind(kind);
visitor.visit_defaultness(defaultness);
}
pub fn walk_struct_def<'v, V: Visitor<'v>>(

1
compiler/rustc_metadata/src/rmeta/decoder.rs
View File

@ -1152,7 +1152,6 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
name,
kind,
vis: self.get_visibility(id),
defaultness: container.defaultness(),
def_id: self.local_def_id(id),
trait_item_def_id: self.get_trait_item_def_id(id),
container: container.with_def_id(parent),

30
compiler/rustc_metadata/src/rmeta/encoder.rs
View File

@ -1212,14 +1212,9 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
let tcx = self.tcx;
let ast_item = tcx.hir().expect_trait_item(def_id.expect_local());
self.tables.impl_defaultness.set(def_id.index, ast_item.defaultness);
let trait_item = tcx.associated_item(def_id);
let container = match trait_item.defaultness {
hir::Defaultness::Default { has_value: true } => AssocContainer::TraitWithDefault,
hir::Defaultness::Default { has_value: false } => AssocContainer::TraitRequired,
hir::Defaultness::Final => span_bug!(ast_item.span, "traits cannot have final items"),
};
match trait_item.kind {
ty::AssocKind::Const => {
let rendered = rustc_hir_pretty::to_string(
@ -1227,7 +1222,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
|s| s.print_trait_item(ast_item),
);
record!(self.tables.kind[def_id] <- EntryKind::AssocConst(container));
record!(self.tables.kind[def_id] <- EntryKind::AssocConst(AssocContainer::Trait));
record!(self.tables.mir_const_qualif[def_id] <- mir::ConstQualifs::default());
record!(self.tables.rendered_const[def_id] <- rendered);
}
@ -1244,13 +1239,13 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
self.tables.asyncness.set(def_id.index, m_sig.header.asyncness);
self.tables.constness.set(def_id.index, hir::Constness::NotConst);
record!(self.tables.kind[def_id] <- EntryKind::AssocFn(self.lazy(AssocFnData {
container,
container:AssocContainer::Trait,
has_self: trait_item.fn_has_self_parameter,
})));
}
ty::AssocKind::Type => {
self.encode_explicit_item_bounds(def_id);
record!(self.tables.kind[def_id] <- EntryKind::AssocType(container));
record!(self.tables.kind[def_id] <- EntryKind::AssocType(AssocContainer::Trait));
}
}
match trait_item.kind {
@ -1258,7 +1253,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
self.encode_item_type(def_id);
}
ty::AssocKind::Type => {
if trait_item.defaultness.has_value() {
if ast_item.defaultness.has_value() {
self.encode_item_type(def_id);
}
}
@ -1273,23 +1268,16 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
let tcx = self.tcx;
let ast_item = self.tcx.hir().expect_impl_item(def_id.expect_local());
self.tables.impl_defaultness.set(def_id.index, ast_item.defaultness);
let impl_item = self.tcx.associated_item(def_id);
let container = match impl_item.defaultness {
hir::Defaultness::Default { has_value: true } => AssocContainer::ImplDefault,
hir::Defaultness::Final => AssocContainer::ImplFinal,
hir::Defaultness::Default { has_value: false } => {
span_bug!(ast_item.span, "impl items always have values (currently)")
}
};
match impl_item.kind {
ty::AssocKind::Const => {
if let hir::ImplItemKind::Const(_, body_id) = ast_item.kind {
let qualifs = self.tcx.at(ast_item.span).mir_const_qualif(def_id);
let const_data = self.encode_rendered_const_for_body(body_id);
record!(self.tables.kind[def_id] <- EntryKind::AssocConst(container));
record!(self.tables.kind[def_id] <- EntryKind::AssocConst(AssocContainer::Impl));
record!(self.tables.mir_const_qualif[def_id] <- qualifs);
record!(self.tables.rendered_const[def_id] <- const_data);
} else {
@ -1308,12 +1296,12 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
};
self.tables.constness.set(def_id.index, constness);
record!(self.tables.kind[def_id] <- EntryKind::AssocFn(self.lazy(AssocFnData {
container,
container:AssocContainer::Impl,
has_self: impl_item.fn_has_self_parameter,
})));
}
ty::AssocKind::Type => {
record!(self.tables.kind[def_id] <- EntryKind::AssocType(container));
record!(self.tables.kind[def_id] <- EntryKind::AssocType(AssocContainer::Impl));
}
}
self.encode_item_type(def_id);

25
compiler/rustc_metadata/src/rmeta/mod.rs
View File

@ -439,32 +439,15 @@ struct VariantData {
/// a default, or an in impl, whether it's marked "default".
#[derive(Copy, Clone, TyEncodable, TyDecodable)]
enum AssocContainer {
TraitRequired,
TraitWithDefault,
ImplDefault,
ImplFinal,
Trait,
Impl,
}
impl AssocContainer {
fn with_def_id(&self, def_id: DefId) -> ty::AssocItemContainer {
match *self {
AssocContainer::TraitRequired | AssocContainer::TraitWithDefault => {
ty::TraitContainer(def_id)
}
AssocContainer::ImplDefault | AssocContainer::ImplFinal => ty::ImplContainer(def_id),
}
}
fn defaultness(&self) -> hir::Defaultness {
match *self {
AssocContainer::TraitRequired => hir::Defaultness::Default { has_value: false },
AssocContainer::TraitWithDefault | AssocContainer::ImplDefault => {
hir::Defaultness::Default { has_value: true }
}
AssocContainer::ImplFinal => hir::Defaultness::Final,
AssocContainer::Trait => ty::TraitContainer(def_id),
AssocContainer::Impl => ty::ImplContainer(def_id),
}
}
}

2
compiler/rustc_middle/src/traits/specialization_graph.rs
View File

@ -217,7 +217,7 @@ impl<'tcx> Ancestors<'tcx> {
self.find_map(|node| {
if let Some(item) = node.item(tcx, trait_item_def_id) {
if finalizing_node.is_none() {
let is_specializable = item.defaultness.is_default()
let is_specializable = item.defaultness(tcx).is_default()
|| tcx.impl_defaultness(node.def_id()).is_default();
if !is_specializable {

5
compiler/rustc_middle/src/ty/assoc.rs
View File

@ -47,7 +47,6 @@ pub struct AssocItem {
pub name: Symbol,
pub kind: AssocKind,
pub vis: Visibility,
pub defaultness: hir::Defaultness,
pub container: AssocItemContainer,
/// If this is an item in an impl of a trait then this is the `DefId` of
@ -64,6 +63,10 @@ impl AssocItem {
Ident::new(self.name, tcx.def_ident_span(self.def_id).unwrap())
}
pub fn defaultness(&self, tcx: TyCtxt<'_>) -> hir::Defaultness {
tcx.impl_defaultness(self.def_id)
}
pub fn signature(&self, tcx: TyCtxt<'_>) -> String {
match self.kind {
ty::AssocKind::Fn => {

3
compiler/rustc_middle/src/ty/error.rs
View File

@ -844,7 +844,8 @@ fn foo(&self) -> Self::T { String::new() }
hir::AssocItemKind::Type => {
// FIXME: account for returning some type in a trait fn impl that has
// an assoc type as a return type (#72076).
if let hir::Defaultness::Default { has_value: true } = item.defaultness
if let hir::Defaultness::Default { has_value: true } =
self.impl_defaultness(item.id.def_id)
{
if self.type_of(item.id.def_id) == found {
diag.span_label(

2
compiler/rustc_middle/src/ty/mod.rs
View File

@ -1945,7 +1945,7 @@ impl<'tcx> TyCtxt<'tcx> {
pub fn provided_trait_methods(self, id: DefId) -> impl 'tcx + Iterator<Item = &'tcx AssocItem> {
self.associated_items(id)
.in_definition_order()
.filter(|item| item.kind == AssocKind::Fn && item.defaultness.has_value())
.filter(move |item| item.kind == AssocKind::Fn && item.defaultness(self).has_value())
}
/// Look up the name of a definition across crates. This does not look at HIR.

8
compiler/rustc_privacy/src/lib.rs
View File

@ -734,11 +734,12 @@ impl<'tcx> Visitor<'tcx> for EmbargoVisitor<'tcx> {
self.reach(item.def_id, item_level).generics().predicates();
for trait_item_ref in trait_item_refs {
let tcx = self.tcx;
let mut reach = self.reach(trait_item_ref.id.def_id, item_level);
reach.generics().predicates();
if trait_item_ref.kind == AssocItemKind::Type
&& !trait_item_ref.defaultness.has_value()
&& !tcx.impl_defaultness(trait_item_ref.id.def_id).has_value()
{
// No type to visit.
} else {
@ -1839,14 +1840,13 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'tcx> {
&self,
def_id: LocalDefId,
assoc_item_kind: AssocItemKind,
defaultness: hir::Defaultness,
vis: ty::Visibility,
) {
let mut check = self.check(def_id, vis);
let (check_ty, is_assoc_ty) = match assoc_item_kind {
AssocItemKind::Const | AssocItemKind::Fn { .. } => (true, false),
AssocItemKind::Type => (defaultness.has_value(), true),
AssocItemKind::Type => (self.tcx.impl_defaultness(def_id).has_value(), true),
};
check.in_assoc_ty = is_assoc_ty;
check.generics().predicates();
@ -1878,7 +1878,6 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'tcx> {
self.check_assoc_item(
trait_item_ref.id.def_id,
trait_item_ref.kind,
trait_item_ref.defaultness,
item_visibility,
);
@ -1951,7 +1950,6 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'tcx> {
self.check_assoc_item(
impl_item_ref.id.def_id,
impl_item_ref.kind,
impl_item_ref.defaultness,
impl_item_vis,
);
}

2
compiler/rustc_save_analysis/src/lib.rs
View File

@ -697,7 +697,7 @@ impl<'tcx> SaveContext<'tcx> {
}
Res::Def(HirDefKind::AssocFn, decl_id) => {
let def_id = if decl_id.is_local() {
if self.tcx.associated_item(decl_id).defaultness.has_value() {
if self.tcx.impl_defaultness(decl_id).has_value() {
Some(decl_id)
} else {
None

8
compiler/rustc_trait_selection/src/traits/project.rs
View File

@ -1988,7 +1988,7 @@ fn confirm_impl_candidate<'cx, 'tcx>(
return Progress { term: tcx.ty_error().into(), obligations: nested };
};
if !assoc_ty.item.defaultness.has_value() {
if !assoc_ty.item.defaultness(tcx).has_value() {
// This means that the impl is missing a definition for the
// associated type. This error will be reported by the type
// checker method `check_impl_items_against_trait`, so here we
@ -2089,7 +2089,11 @@ fn assoc_def(
return Ok(specialization_graph::LeafDef {
item: *item,
defining_node: impl_node,
finalizing_node: if item.defaultness.is_default() { None } else { Some(impl_node) },
finalizing_node: if item.defaultness(tcx).is_default() {
None
} else {
Some(impl_node)
},
});
}

3
compiler/rustc_trait_selection/src/traits/util.rs
View File

@ -358,7 +358,8 @@ pub fn generator_trait_ref_and_outputs<'tcx>(
}
pub fn impl_item_is_final(tcx: TyCtxt<'_>, assoc_item: &ty::AssocItem) -> bool {
assoc_item.defaultness.is_final() && tcx.impl_defaultness(assoc_item.container.id()).is_final()
assoc_item.defaultness(tcx).is_final()
&& tcx.impl_defaultness(assoc_item.container.id()).is_final()
}
pub enum TupleArgumentsFlag {

2
compiler/rustc_ty_utils/src/assoc.rs
View File

@ -103,7 +103,6 @@ fn associated_item_from_trait_item_ref(
name: trait_item_ref.ident.name,
kind,
vis: tcx.visibility(def_id),
defaultness: trait_item_ref.defaultness,
def_id: def_id.to_def_id(),
trait_item_def_id: Some(def_id.to_def_id()),
container: ty::TraitContainer(parent_def_id.to_def_id()),
@ -127,7 +126,6 @@ fn associated_item_from_impl_item_ref(
name: impl_item_ref.ident.name,
kind,
vis: tcx.visibility(def_id),
defaultness: impl_item_ref.defaultness,
def_id: def_id.to_def_id(),
trait_item_def_id: impl_item_ref.trait_item_def_id,
container: ty::ImplContainer(parent_def_id.to_def_id()),

2
compiler/rustc_ty_utils/src/instance.rs
View File

@ -281,7 +281,7 @@ fn resolve_associated_item<'tcx>(
}
// If the item does not have a value, then we cannot return an instance.
if !leaf_def.item.defaultness.has_value() {
if !leaf_def.item.defaultness(tcx).has_value() {
return Ok(None);
}

12
compiler/rustc_ty_utils/src/ty.rs
View File

@ -70,11 +70,13 @@ fn sized_constraint_for_ty<'tcx>(
}
fn impl_defaultness(tcx: TyCtxt<'_>, def_id: DefId) -> hir::Defaultness {
let item = tcx.hir().expect_item(def_id.expect_local());
if let hir::ItemKind::Impl(impl_) = &item.kind {
impl_.defaultness
} else {
bug!("`impl_defaultness` called on {:?}", item);
match tcx.hir().get_by_def_id(def_id.expect_local()) {
hir::Node::Item(hir::Item { kind: hir::ItemKind::Impl(impl_), .. }) => impl_.defaultness,
hir::Node::ImplItem(hir::ImplItem { defaultness, .. })
| hir::Node::TraitItem(hir::TraitItem { defaultness, .. }) => *defaultness,
node => {
bug!("`impl_defaultness` called on {:?}", node);
}
}
}

2
compiler/rustc_typeck/src/check/check.rs
View File

@ -1098,7 +1098,7 @@ fn check_impl_items_against_trait<'tcx>(
for &trait_item_id in tcx.associated_item_def_ids(impl_trait_ref.def_id) {
let is_implemented = ancestors
.leaf_def(tcx, trait_item_id)
.map_or(false, |node_item| node_item.item.defaultness.has_value());
.map_or(false, |node_item| node_item.item.defaultness(tcx).has_value());
if !is_implemented && tcx.impl_defaultness(impl_id).is_final() {
missing_items.push(tcx.associated_item(trait_item_id));

2
compiler/rustc_typeck/src/check/wfcheck.rs
View File

@ -1007,7 +1007,7 @@ fn check_associated_item(
if let ty::AssocItemContainer::TraitContainer(_) = item.container {
check_associated_type_bounds(wfcx, item, span)
}
if item.defaultness.has_value() {
if item.defaultness(tcx).has_value() {
let ty = tcx.type_of(item.def_id);
let ty = wfcx.normalize(span, Some(WellFormedLoc::Ty(item_id)), ty);
wfcx.register_wf_obligation(span, loc, ty.into());

2
compiler/rustc_typeck/src/collect.rs
View File

@ -1234,7 +1234,7 @@ fn trait_def(tcx: TyCtxt<'_>, def_id: DefId) -> ty::TraitDef {
match item {
Some(item) if matches!(item.kind, hir::AssocItemKind::Fn { .. }) => {
if !item.defaultness.has_value() {
if !tcx.impl_defaultness(item.id.def_id).has_value() {
tcx.sess
.struct_span_err(
item.span,

2
compiler/rustc_typeck/src/impl_wf_check.rs
View File

@ -106,7 +106,7 @@ fn enforce_impl_params_are_constrained(tcx: TyCtxt<'_>, impl_def_id: LocalDefId)
let item = tcx.associated_item(def_id);
match item.kind {
ty::AssocKind::Type => {
if item.defaultness.has_value() {
if item.defaultness(tcx).has_value() {
cgp::parameters_for(&tcx.type_of(def_id), true)
} else {
Vec::new()

10
src/librustdoc/clean/mod.rs
View File

@ -1101,7 +1101,7 @@ impl<'tcx> Clean<'tcx, Item> for hir::ImplItem<'tcx> {
}
hir::ImplItemKind::Fn(ref sig, body) => {
let m = clean_function(cx, sig, self.generics, body);
let defaultness = cx.tcx.associated_item(self.def_id).defaultness;
let defaultness = cx.tcx.impl_defaultness(self.def_id);
MethodItem(m, Some(defaultness))
}
hir::ImplItemKind::TyAlias(hir_ty) => {
@ -1140,7 +1140,7 @@ impl<'tcx> Clean<'tcx, Item> for ty::AssocItem {
let provided = match self.container {
ty::ImplContainer(_) => true,
ty::TraitContainer(_) => self.defaultness.has_value(),
ty::TraitContainer(_) => tcx.impl_defaultness(self.def_id).has_value(),
};
if provided {
AssocConstItem(ty, ConstantKind::Extern { def_id: self.def_id })
@ -1179,11 +1179,11 @@ impl<'tcx> Clean<'tcx, Item> for ty::AssocItem {
let provided = match self.container {
ty::ImplContainer(_) => true,
ty::TraitContainer(_) => self.defaultness.has_value(),
ty::TraitContainer(_) => self.defaultness(tcx).has_value(),
};
if provided {
let defaultness = match self.container {
ty::ImplContainer(_) => Some(self.defaultness),
ty::ImplContainer(_) => Some(self.defaultness(tcx)),
ty::TraitContainer(_) => None,
};
MethodItem(Box::new(Function { generics, decl }), defaultness)
@ -1280,7 +1280,7 @@ impl<'tcx> Clean<'tcx, Item> for ty::AssocItem {
None => bounds.push(GenericBound::maybe_sized(cx)),
}
if self.defaultness.has_value() {
if tcx.impl_defaultness(self.def_id).has_value() {
AssocTypeItem(
Box::new(Typedef {
type_: clean_middle_ty(

2
src/librustdoc/passes/collect_intra_doc_links.rs
View File

@ -234,7 +234,7 @@ impl UrlFragment {
&UrlFragment::Item(def_id) => {
let kind = match tcx.def_kind(def_id) {
DefKind::AssocFn => {
if tcx.associated_item(def_id).defaultness.has_value() {
if tcx.impl_defaultness(def_id).has_value() {
"method."
} else {
"tymethod."

2
src/tools/clippy/clippy_lints/src/missing_inline.rs
View File

@ -105,7 +105,7 @@ impl<'tcx> LateLintPass<'tcx> for MissingInline {
match tit_.kind {
hir::TraitItemKind::Const(..) | hir::TraitItemKind::Type(..) => {},
hir::TraitItemKind::Fn(..) => {
if tit.defaultness.has_value() {
if cx.tcx.impl_defaultness(tit.id.def_id).has_value() {
// trait method with default body needs inline in case
// an impl is not provided
let desc = "a default trait method";