Remove `ty::ClosureKind::from_def_id`

…in favour of `TyCtxt::fn_trait_kind_from_def_id`

2 files changed, 7 insertions, 6 deletions

diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
index c466e1e29ad..de35fbfe6d0 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
@@ -357,7 +357,8 @@ impl<'tcx> InferCtxtExt<'tcx> for InferCtxt<'tcx> {
                 ocx.register_obligation(obligation);
                 if ocx.select_all_or_error().is_empty() {
                     return Ok((
-                        ty::ClosureKind::from_def_id(self.tcx, trait_def_id)
+                        self.tcx
+                            .fn_trait_kind_from_def_id(trait_def_id)
                             .expect("expected to map DefId to ClosureKind"),
                         ty.rebind(self.resolve_vars_if_possible(var)),
                     ));
@@ -686,7 +687,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                                 }
                                 ObligationCauseCode::BindingObligation(def_id, _)
                                 | ObligationCauseCode::ItemObligation(def_id)
-                                    if ty::ClosureKind::from_def_id(tcx, *def_id).is_some() =>
+                                    if tcx.fn_trait_kind_from_def_id(*def_id).is_some() =>
                                 {
                                     err.code(rustc_errors::error_code!(E0059));
                                     err.set_primary_message(format!(
@@ -847,7 +848,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                         }
 
                         let is_fn_trait =
-                            ty::ClosureKind::from_def_id(tcx, trait_ref.def_id()).is_some();
+                            tcx.fn_trait_kind_from_def_id(trait_ref.def_id()).is_some();
                         let is_target_feature_fn = if let ty::FnDef(def_id, _) =
                             *trait_ref.skip_binder().self_ty().kind()
                         {
@@ -877,7 +878,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                             // Note if the `FnMut` or `FnOnce` is less general than the trait we're trying
                             // to implement.
                             let selected_kind =
-                                ty::ClosureKind::from_def_id(self.tcx, trait_ref.def_id())
+                                self.tcx.fn_trait_kind_from_def_id(trait_ref.def_id())
                                     .expect("expected to map DefId to ClosureKind");
                             if !implemented_kind.extends(selected_kind) {
                                 err.note(
diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index 07ba4d0c3b8..4ae9b22f221 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -1752,7 +1752,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
             && let predicates = self.tcx.predicates_of(def_id).instantiate_identity(self.tcx)
             && let Some(pred) = predicates.predicates.get(*idx)
             && let ty::PredicateKind::Clause(ty::Clause::Trait(trait_pred)) = pred.kind().skip_binder()
-            && ty::ClosureKind::from_def_id(self.tcx, trait_pred.def_id()).is_some()
+            && self.tcx.fn_trait_kind_from_def_id(trait_pred.def_id()).is_some()
         {
             let expected_self =
                 self.tcx.anonymize_late_bound_regions(pred.kind().rebind(trait_pred.self_ty()));
@@ -1766,7 +1766,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                 .enumerate()
                 .find(|(other_idx, (pred, _))| match pred.kind().skip_binder() {
                     ty::PredicateKind::Clause(ty::Clause::Trait(trait_pred))
-                        if ty::ClosureKind::from_def_id(self.tcx, trait_pred.def_id())
+                        if self.tcx.fn_trait_kind_from_def_id(trait_pred.def_id())
                             .is_some()
                             && other_idx != idx
                             // Make sure that the self type matches