Rename projection_def_id to item_def_id

compiler/rustc_hir_analysis/src/hir_ty_lowering/dyn_compatibility.rs

@@ -203,7 +203,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
         // corresponding `Projection` clause
         for def_ids in associated_types.values_mut() {
             for (projection_bound, span) in &projection_bounds {
-                let def_id = projection_bound.projection_def_id();
+                let def_id = projection_bound.item_def_id();
                 def_ids.swap_remove(&def_id);
                 if tcx.generics_require_sized_self(def_id) {
                     tcx.emit_node_span_lint(
@@ -413,7 +413,7 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
             late_bound_in_projection_term,
             late_bound_in_term,
             |br_name| {
-                let item_name = tcx.item_name(pred.projection_def_id());
+                let item_name = tcx.item_name(pred.item_def_id());
                 struct_span_code_err!(
                     self.dcx(),
                     span,

compiler/rustc_hir_typeck/src/closure.rs

@@ -454,7 +454,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         closure_kind: hir::ClosureKind,
         projection: ty::PolyProjectionPredicate<'tcx>,
     ) -> Option<ExpectedSig<'tcx>> {
-        let def_id = projection.projection_def_id();
+        let def_id = projection.item_def_id();
 
         // For now, we only do signature deduction based off of the `Fn` and `AsyncFn` traits,
         // for closures and async closures, respectively.

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -1020,7 +1020,7 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
 
                     self.insert_trait_and_projection(
                         trait_ref,
-                        Some((proj.projection_def_id(), proj.term())),
+                        Some((proj.item_def_id(), proj.term())),
                         &mut traits,
                         &mut fn_traits,
                     );

compiler/rustc_next_trait_solver/src/solve/normalizes_to/mod.rs

@@ -144,7 +144,7 @@ where
         then: impl FnOnce(&mut EvalCtxt<'_, D>) -> QueryResult<I>,
     ) -> Result<Candidate<I>, NoSolution> {
         if let Some(projection_pred) = assumption.as_projection_clause() {
-            if projection_pred.projection_def_id() == goal.predicate.def_id() {
+            if projection_pred.item_def_id() == goal.predicate.def_id() {
                 let cx = ecx.cx();
                 if !DeepRejectCtxt::relate_rigid_rigid(ecx.cx()).args_may_unify(
                     goal.predicate.alias.args,

compiler/rustc_trait_selection/src/traits/project.rs

@@ -744,7 +744,7 @@ fn assemble_candidates_from_trait_def<'cx, 'tcx>(
             let Some(clause) = clause.as_projection_clause() else {
                 return ControlFlow::Continue(());
             };
-            if clause.projection_def_id() != obligation.predicate.def_id {
+            if clause.item_def_id() != obligation.predicate.def_id {
                 return ControlFlow::Continue(());
             }
 
@@ -847,7 +847,7 @@ fn assemble_candidates_from_predicates<'cx, 'tcx>(
         let bound_predicate = predicate.kind();
         if let ty::ClauseKind::Projection(data) = predicate.kind().skip_binder() {
             let data = bound_predicate.rebind(data);
-            if data.projection_def_id() != obligation.predicate.def_id {
+            if data.item_def_id() != obligation.predicate.def_id {
                 continue;
             }
 

compiler/rustc_trait_selection/src/traits/select/mod.rs

@@ -1737,7 +1737,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
         env_predicate: PolyProjectionPredicate<'tcx>,
         potentially_unnormalized_candidates: bool,
     ) -> ProjectionMatchesProjection {
-        debug_assert_eq!(obligation.predicate.def_id, env_predicate.projection_def_id());
+        debug_assert_eq!(obligation.predicate.def_id, env_predicate.item_def_id());
 
         let mut nested_obligations = PredicateObligations::new();
         let infer_predicate = self.infcx.instantiate_binder_with_fresh_vars(

compiler/rustc_type_ir/src/predicate.rs

@@ -692,7 +692,7 @@ impl<I: Interner> ty::Binder<I, ProjectionPredicate<I>> {
     ///
     /// Note that this is not the `DefId` of the `TraitRef` containing this
     /// associated type, which is in `tcx.associated_item(projection_def_id()).container`.
-    pub fn projection_def_id(&self) -> I::DefId {
+    pub fn item_def_id(&self) -> I::DefId {
         // Ok to skip binder since trait `DefId` does not care about regions.
         self.skip_binder().projection_term.def_id
     }