Add of_trait to DefKind::Impl.

compiler/rustc_borrowck/src/diagnostics/mod.rs

@@ -1182,13 +1182,13 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         );
                     }
                     let parent_did = tcx.parent(method_did);
-                    let parent_self_ty = (tcx.def_kind(parent_did)
-                        == rustc_hir::def::DefKind::Impl)
-                        .then_some(parent_did)
-                        .and_then(|did| match tcx.type_of(did).kind() {
-                            ty::Adt(def, ..) => Some(def.did()),
-                            _ => None,
-                        });
+                    let parent_self_ty =
+                        matches!(tcx.def_kind(parent_did), rustc_hir::def::DefKind::Impl { .. })
+                            .then_some(parent_did)
+                            .and_then(|did| match tcx.type_of(did).kind() {
+                                ty::Adt(def, ..) => Some(def.did()),
+                                _ => None,
+                            });
                     let is_option_or_result = parent_self_ty.map_or(false, |def_id| {
                         matches!(tcx.get_diagnostic_name(def_id), Some(sym::Option | sym::Result))
                     });

compiler/rustc_borrowck/src/diagnostics/region_name.rs

@@ -852,9 +852,9 @@ impl<'tcx> MirBorrowckCtxt<'_, 'tcx> {
 
         let tcx = self.infcx.tcx;
         let region_parent = tcx.parent(region.def_id);
-        if tcx.def_kind(region_parent) != DefKind::Impl {
+        let DefKind::Impl { .. } = tcx.def_kind(region_parent) else {
             return None;
-        }
+        };
 
         let found = tcx
             .any_free_region_meets(&tcx.type_of(region_parent), |r| *r == ty::ReEarlyBound(region));

compiler/rustc_const_eval/src/const_eval/fn_queries.rs

@@ -17,7 +17,8 @@ pub fn is_unstable_const_fn(tcx: TyCtxt<'_>, def_id: DefId) -> Option<Symbol> {
 
 pub fn is_parent_const_impl_raw(tcx: TyCtxt<'_>, def_id: LocalDefId) -> bool {
     let parent_id = tcx.local_parent(def_id);
-    tcx.def_kind(parent_id) == DefKind::Impl && tcx.constness(parent_id) == hir::Constness::Const
+    matches!(tcx.def_kind(parent_id), DefKind::Impl { .. })
+        && tcx.constness(parent_id) == hir::Constness::Const
 }
 
 /// Checks whether an item is considered to be `const`. If it is a constructor, it is const. If

compiler/rustc_hir/src/def.rs

@@ -116,7 +116,9 @@ pub enum DefKind {
     LifetimeParam,
     /// A use of `global_asm!`.
     GlobalAsm,
-    Impl,
+    Impl {
+        of_trait: bool,
+    },
     Closure,
     Generator,
 }
@@ -155,7 +157,7 @@ impl DefKind {
             DefKind::AnonConst => "constant expression",
             DefKind::InlineConst => "inline constant",
             DefKind::Field => "field",
-            DefKind::Impl => "implementation",
+            DefKind::Impl { .. } => "implementation",
             DefKind::Closure => "closure",
             DefKind::Generator => "generator",
             DefKind::ExternCrate => "extern crate",
@@ -171,7 +173,7 @@ impl DefKind {
             | DefKind::AssocFn
             | DefKind::Enum
             | DefKind::OpaqueTy
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::Use
             | DefKind::InlineConst
             | DefKind::ExternCrate => "an",
@@ -216,7 +218,7 @@ impl DefKind {
             | DefKind::Use
             | DefKind::ForeignMod
             | DefKind::GlobalAsm
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::ImplTraitPlaceholder => None,
         }
     }
@@ -255,7 +257,7 @@ impl DefKind {
             | DefKind::ForeignMod
             | DefKind::OpaqueTy
             | DefKind::ImplTraitPlaceholder
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::Field
             | DefKind::TyParam
             | DefKind::ConstParam

compiler/rustc_hir/src/target.rs

@@ -116,7 +116,7 @@ impl Target {
             DefKind::Union => Target::Union,
             DefKind::Trait => Target::Trait,
             DefKind::TraitAlias => Target::TraitAlias,
-            DefKind::Impl => Target::Impl,
+            DefKind::Impl { .. } => Target::Impl,
             _ => panic!("impossible case reached"),
         }
     }

compiler/rustc_hir_analysis/src/check/check.rs

@@ -529,19 +529,21 @@ fn check_item_type(tcx: TyCtxt<'_>, id: hir::ItemId) {
             check_enum(tcx, id.owner_id.def_id);
         }
         DefKind::Fn => {} // entirely within check_item_body
-        DefKind::Impl => {
-            let it = tcx.hir().item(id);
-            let hir::ItemKind::Impl(impl_) = it.kind else { return };
-            debug!("ItemKind::Impl {} with id {:?}", it.ident, it.owner_id);
-            if let Some(impl_trait_ref) = tcx.impl_trait_ref(it.owner_id) {
-                check_impl_items_against_trait(
-                    tcx,
-                    it.span,
-                    it.owner_id.def_id,
-                    impl_trait_ref.subst_identity(),
-                    &impl_.items,
-                );
-                check_on_unimplemented(tcx, it);
+        DefKind::Impl { of_trait } => {
+            if of_trait {
+                let it = tcx.hir().item(id);
+                let hir::ItemKind::Impl(impl_) = it.kind else { return };
+                debug!("ItemKind::Impl {} with id {:?}", it.ident, it.owner_id);
+                if let Some(impl_trait_ref) = tcx.impl_trait_ref(it.owner_id) {
+                    check_impl_items_against_trait(
+                        tcx,
+                        it.span,
+                        it.owner_id.def_id,
+                        impl_trait_ref.subst_identity(),
+                        &impl_.items,
+                    );
+                    check_on_unimplemented(tcx, it);
+                }
             }
         }
         DefKind::Trait => {

compiler/rustc_hir_analysis/src/coherence/inherent_impls.rs

@@ -177,7 +177,7 @@ impl<'tcx> InherentCollect<'tcx> {
     }
 
     fn check_item(&mut self, id: hir::ItemId) {
-        if !matches!(self.tcx.def_kind(id.owner_id), DefKind::Impl) {
+        if !matches!(self.tcx.def_kind(id.owner_id), DefKind::Impl { of_trait: false }) {
             return;
         }
 

compiler/rustc_hir_analysis/src/collect/lifetimes.rs

@@ -1563,7 +1563,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
             // See issue #83753. If someone writes an associated type on a non-trait, just treat it as
             // there being no supertrait HRTBs.
             match tcx.def_kind(def_id) {
-                DefKind::Trait | DefKind::TraitAlias | DefKind::Impl => {}
+                DefKind::Trait | DefKind::TraitAlias | DefKind::Impl { .. } => {}
                 _ => break None,
             }
 

compiler/rustc_hir_analysis/src/impl_wf_check.rs

@@ -55,7 +55,7 @@ fn check_mod_impl_wf(tcx: TyCtxt<'_>, module_def_id: LocalDefId) {
     let min_specialization = tcx.features().min_specialization;
     let module = tcx.hir_module_items(module_def_id);
     for id in module.items() {
-        if matches!(tcx.def_kind(id.owner_id), DefKind::Impl) {
+        if matches!(tcx.def_kind(id.owner_id), DefKind::Impl { .. }) {
             enforce_impl_params_are_constrained(tcx, id.owner_id.def_id);
             if min_specialization {
                 check_min_specialization(tcx, id.owner_id.def_id);

compiler/rustc_infer/src/infer/error_reporting/need_type_info.rs

@@ -1061,7 +1061,7 @@ impl<'a, 'tcx> FindInferSourceVisitor<'a, 'tcx> {
                 };
 
                 let parent_def_id = generics.parent.unwrap();
-                if tcx.def_kind(parent_def_id) == DefKind::Impl {
+                if let DefKind::Impl { .. } = tcx.def_kind(parent_def_id) {
                     let parent_ty = tcx.bound_type_of(parent_def_id).subst(tcx, substs);
                     match (parent_ty.kind(), &ty.kind) {
                         (

compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -838,7 +838,7 @@ fn should_encode_visibility(def_kind: DefKind) -> bool {
         | DefKind::ForeignMod
         | DefKind::OpaqueTy
         | DefKind::ImplTraitPlaceholder
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::Field => true,
         DefKind::TyParam
         | DefKind::ConstParam
@@ -873,7 +873,7 @@ fn should_encode_stability(def_kind: DefKind) -> bool {
         | DefKind::ImplTraitPlaceholder
         | DefKind::Enum
         | DefKind::Union
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::Trait
         | DefKind::TraitAlias
         | DefKind::Macro(..)
@@ -951,7 +951,7 @@ fn should_encode_variances(def_kind: DefKind) -> bool {
         | DefKind::Const
         | DefKind::ForeignMod
         | DefKind::TyAlias
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::Trait
         | DefKind::TraitAlias
         | DefKind::Macro(..)
@@ -988,7 +988,7 @@ fn should_encode_generics(def_kind: DefKind) -> bool {
         | DefKind::InlineConst
         | DefKind::OpaqueTy
         | DefKind::ImplTraitPlaceholder
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::Field
         | DefKind::TyParam
         | DefKind::Closure
@@ -1018,7 +1018,7 @@ fn should_encode_type(tcx: TyCtxt<'_>, def_id: LocalDefId, def_kind: DefKind) ->
         | DefKind::TyAlias
         | DefKind::OpaqueTy
         | DefKind::ForeignTy
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::AssocFn
         | DefKind::AssocConst
         | DefKind::Closure
@@ -1081,7 +1081,7 @@ fn should_encode_const(def_kind: DefKind) -> bool {
         | DefKind::OpaqueTy
         | DefKind::ImplTraitPlaceholder
         | DefKind::ForeignTy
-        | DefKind::Impl
+        | DefKind::Impl { .. }
         | DefKind::AssocFn
         | DefKind::Closure
         | DefKind::Generator
@@ -1860,7 +1860,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
             FxHashMap::default();
 
         for id in tcx.hir().items() {
-            if matches!(tcx.def_kind(id.owner_id), DefKind::Impl) {
+            if matches!(tcx.def_kind(id.owner_id), DefKind::Impl { .. }) {
                 if let Some(trait_ref) = tcx.impl_trait_ref(id.owner_id) {
                     let trait_ref = trait_ref.subst_identity();
 
@@ -2261,7 +2261,7 @@ pub fn provide(providers: &mut Providers) {
 
             let mut trait_impls = Vec::new();
             for id in tcx.hir().items() {
-                if matches!(tcx.def_kind(id.owner_id), DefKind::Impl)
+                if matches!(tcx.def_kind(id.owner_id), DefKind::Impl { .. })
                     && tcx.impl_trait_ref(id.owner_id).is_some()
                 {
                     trait_impls.push(id.owner_id.to_def_id())

compiler/rustc_metadata/src/rmeta/table.rs

@@ -136,7 +136,8 @@ fixed_size_enum! {
         ( Field                                    )
         ( LifetimeParam                            )
         ( GlobalAsm                                )
-        ( Impl                                     )
+        ( Impl { of_trait: false }                 )
+        ( Impl { of_trait: true }                  )
         ( Closure                                  )
         ( Generator                                )
         ( Static(ast::Mutability::Not)             )

compiler/rustc_middle/src/hir/map/mod.rs

@@ -203,7 +203,7 @@ impl<'hir> Map<'hir> {
                 ItemKind::Use(..) => DefKind::Use,
                 ItemKind::ForeignMod { .. } => DefKind::ForeignMod,
                 ItemKind::GlobalAsm(..) => DefKind::GlobalAsm,
-                ItemKind::Impl { .. } => DefKind::Impl,
+                ItemKind::Impl(impl_) => DefKind::Impl { of_trait: impl_.of_trait.is_some() },
             },
             Node::ForeignItem(item) => match item.kind {
                 ForeignItemKind::Fn(..) => DefKind::Fn,

compiler/rustc_middle/src/ty/mod.rs

@@ -2427,7 +2427,7 @@ impl<'tcx> TyCtxt<'tcx> {
     pub fn impl_of_method(self, def_id: DefId) -> Option<DefId> {
         if let DefKind::AssocConst | DefKind::AssocFn | DefKind::AssocTy = self.def_kind(def_id) {
             let parent = self.parent(def_id);
-            if let DefKind::Impl = self.def_kind(parent) {
+            if let DefKind::Impl { .. } = self.def_kind(parent) {
                 return Some(parent);
             }
         }

compiler/rustc_middle/src/ty/util.rs

@@ -167,7 +167,7 @@ impl<'tcx> TyCtxt<'tcx> {
                 | DefKind::Fn
                 | DefKind::AssocFn
                 | DefKind::AssocConst
-                | DefKind::Impl,
+                | DefKind::Impl { .. },
                 def_id,
             ) => Some(def_id),
             Res::Err => None,

compiler/rustc_monomorphize/src/collector.rs

@@ -1238,7 +1238,7 @@ impl<'v> RootCollector<'_, 'v> {
                     collect_const_value(self.tcx, val, &mut self.output);
                 }
             }
-            DefKind::Impl => {
+            DefKind::Impl { .. } => {
                 if self.mode == MonoItemCollectionMode::Eager {
                     let item = self.tcx.hir().item(id);
                     create_mono_items_for_default_impls(self.tcx, item, self.output);

compiler/rustc_monomorphize/src/polymorphize.rs

@@ -172,7 +172,7 @@ fn mark_used_by_default_parameters<'tcx>(
         | DefKind::Field
         | DefKind::LifetimeParam
         | DefKind::GlobalAsm
-        | DefKind::Impl => {
+        | DefKind::Impl { .. } => {
             for param in &generics.params {
                 debug!(?param, "(other)");
                 if let ty::GenericParamDefKind::Lifetime = param.kind {

compiler/rustc_passes/src/dead.rs

@@ -526,10 +526,8 @@ fn check_item<'tcx>(
                 }
             }
         }
-        DefKind::Impl => {
-            let of_trait = tcx.impl_trait_ref(id.owner_id);
-
-            if of_trait.is_some() {
+        DefKind::Impl { of_trait } => {
+            if of_trait {
                 worklist.push(id.owner_id.def_id);
             }
 
@@ -541,7 +539,7 @@ fn check_item<'tcx>(
 
             // And we access the Map here to get HirId from LocalDefId
             for id in local_def_ids {
-                if of_trait.is_some() || has_allow_dead_code_or_lang_attr(tcx, id) {
+                if of_trait || has_allow_dead_code_or_lang_attr(tcx, id) {
                     worklist.push(id);
                 }
             }

compiler/rustc_passes/src/liveness.rs

@@ -145,7 +145,7 @@ fn check_liveness(tcx: TyCtxt<'_>, def_id: DefId) {
 
     // Don't run unused pass for #[derive()]
     let parent = tcx.local_parent(local_def_id);
-    if let DefKind::Impl = tcx.def_kind(parent)
+    if let DefKind::Impl { .. } = tcx.def_kind(parent)
         && tcx.has_attr(parent.to_def_id(), sym::automatically_derived)
     {
         return;

compiler/rustc_passes/src/reachable.rs

@@ -320,7 +320,7 @@ fn check_item<'tcx>(
         worklist.push(id.owner_id.def_id);
     }
 
-    if !matches!(tcx.def_kind(id.owner_id), DefKind::Impl) {
+    if !matches!(tcx.def_kind(id.owner_id), DefKind::Impl { of_trait: true }) {
         return;
     }
 

compiler/rustc_privacy/src/lib.rs

@@ -593,7 +593,7 @@ impl<'tcx> EmbargoVisitor<'tcx> {
             | DefKind::InlineConst
             | DefKind::Field
             | DefKind::GlobalAsm
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::Closure
             | DefKind::Generator => (),
         }
@@ -1997,7 +1997,7 @@ impl<'tcx> PrivateItemsInPublicInterfacesChecker<'tcx> {
             // 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 => {
+            DefKind::Impl { .. } => {
                 let item = tcx.hir().item(id);
                 if let hir::ItemKind::Impl(ref impl_) = item.kind {
                     let impl_vis =

compiler/rustc_resolve/src/build_reduced_graph.rs

@@ -987,7 +987,7 @@ impl<'a, 'b> BuildReducedGraphVisitor<'a, 'b> {
                 | DefKind::LifetimeParam
                 | DefKind::GlobalAsm
                 | DefKind::Closure
-                | DefKind::Impl
+                | DefKind::Impl { .. }
                 | DefKind::Generator,
                 _,
             )

compiler/rustc_save_analysis/src/lib.rs

@@ -733,7 +733,7 @@ impl<'tcx> SaveContext<'tcx> {
                 | HirDefKind::Use
                 | HirDefKind::Field
                 | HirDefKind::GlobalAsm
-                | HirDefKind::Impl
+                | HirDefKind::Impl { .. }
                 | HirDefKind::Closure
                 | HirDefKind::Generator,
                 _,

compiler/rustc_ty_utils/src/implied_bounds.rs

@@ -21,7 +21,7 @@ fn assumed_wf_types(tcx: TyCtxt<'_>, def_id: DefId) -> &ty::List<Ty<'_>> {
             assumed_wf_types.extend(liberated_sig.inputs_and_output);
             tcx.intern_type_list(&assumed_wf_types)
         }
-        DefKind::Impl => {
+        DefKind::Impl { .. } => {
             match tcx.impl_trait_ref(def_id) {
                 Some(trait_ref) => {
                     let types: Vec<_> = trait_ref.skip_binder().substs.types().collect();

src/librustdoc/formats/item_type.rs

@@ -140,7 +140,7 @@ impl From<DefKind> for ItemType {
             | DefKind::Field
             | DefKind::LifetimeParam
             | DefKind::GlobalAsm
-            | DefKind::Impl
+            | DefKind::Impl { .. }
             | DefKind::Closure
             | DefKind::Generator => Self::ForeignType,
         }

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -359,7 +359,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
                 _ => def_id,
             })
             .and_then(|self_id| match tcx.def_kind(self_id) {
-                DefKind::Impl => self.def_id_to_res(self_id),
+                DefKind::Impl { .. } => self.def_id_to_res(self_id),
                 DefKind::Use => None,
                 def_kind => Some(Res::Def(def_kind, self_id)),
             })
@@ -1761,7 +1761,7 @@ fn resolution_failure(
                             }
                             Trait | TyAlias | ForeignTy | OpaqueTy | ImplTraitPlaceholder
                             | TraitAlias | TyParam | Static(_) => "associated item",
-                            Impl | GlobalAsm => unreachable!("not a path"),
+                            Impl { .. } | GlobalAsm => unreachable!("not a path"),
                         }
                     } else {
                         "associated item"

src/tools/clippy/clippy_lints/src/same_name_method.rs

@@ -52,7 +52,7 @@ impl<'tcx> LateLintPass<'tcx> for SameNameMethod {
         let mut map = FxHashMap::<Res, ExistingName>::default();
 
         for id in cx.tcx.hir().items() {
-            if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl)
+            if matches!(cx.tcx.def_kind(id.owner_id), DefKind::Impl { .. })
                 && let item = cx.tcx.hir().item(id)
                 && let ItemKind::Impl(Impl {
                   items,

src/tools/clippy/clippy_utils/src/lib.rs

@@ -552,7 +552,7 @@ fn non_local_item_children_by_name(tcx: TyCtxt<'_>, def_id: DefId, name: Symbol)
             .filter(|item| item.ident.name == name)
             .map(|child| child.res.expect_non_local())
             .collect(),
-        DefKind::Impl => tcx
+        DefKind::Impl { .. } => tcx
             .associated_item_def_ids(def_id)
             .iter()
             .copied()