Rollup merge of rust-lang#99980 - GuillaumeGomez:rm-clean-impls, r=Dylan-DPC

Remove more Clean trait implementations

This time as well it allowed to remove a function.

Follow-up of rust-lang#99638.

r? `@notriddle`

Author: matthiaskrgr

src/librustdoc/clean/mod.rs

@@ -1019,7 +1019,7 @@ impl<'tcx> Clean<'tcx, bool> for hir::IsAuto {
 
 impl<'tcx> Clean<'tcx, Path> for hir::TraitRef<'tcx> {
     fn clean(&self, cx: &mut DocContext<'tcx>) -> Path {
-        let path = self.path.clean(cx);
+        let path = clean_path(self.path, cx);
         register_res(cx, path.res);
         path
     }
@@ -1344,7 +1344,7 @@ fn clean_qpath<'tcx>(hir_ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> Type
             if let Some(expanded) = maybe_expand_private_type_alias(cx, path) {
                 expanded
             } else {
-                let path = path.clean(cx);
+                let path = clean_path(path, cx);
                 resolve_type(cx, path)
             }
         }
@@ -1380,7 +1380,7 @@ fn clean_qpath<'tcx>(hir_ty: &hir::Ty<'tcx>, cx: &mut DocContext<'tcx>) -> Type
                 ty::Error(_) => return Type::Infer,
                 _ => bug!("clean: expected associated type, found `{:?}`", ty),
             };
-            let trait_ = hir::Path { span, res, segments: &[] }.clean(cx);
+            let trait_ = clean_path(&hir::Path { span, res, segments: &[] }, cx);
             register_res(cx, trait_.res);
             let self_def_id = res.opt_def_id();
             let self_type = clean_ty(qself, cx);
@@ -1857,10 +1857,8 @@ fn clean_variant_data<'tcx>(
     }
 }
 
-impl<'tcx> Clean<'tcx, Path> for hir::Path<'tcx> {
-    fn clean(&self, cx: &mut DocContext<'tcx>) -> Path {
-        Path { res: self.res, segments: self.segments.iter().map(|x| x.clean(cx)).collect() }
-    }
+fn clean_path<'tcx>(path: &hir::Path<'tcx>, cx: &mut DocContext<'tcx>) -> Path {
+    Path { res: path.res, segments: path.segments.iter().map(|x| x.clean(cx)).collect() }
 }
 
 impl<'tcx> Clean<'tcx, GenericArgs> for hir::GenericArgs<'tcx> {
@@ -1886,7 +1884,8 @@ impl<'tcx> Clean<'tcx, GenericArgs> for hir::GenericArgs<'tcx> {
                 })
                 .collect::<Vec<_>>()
                 .into();
-            let bindings = self.bindings.iter().map(|x| x.clean(cx)).collect::<Vec<_>>().into();
+            let bindings =
+                self.bindings.iter().map(|x| clean_type_binding(x, cx)).collect::<Vec<_>>().into();
             GenericArgs::AngleBracketed { args, bindings }
         }
     }
@@ -2172,7 +2171,7 @@ fn clean_use_statement<'tcx>(
 
     // Also check whether imports were asked to be inlined, in case we're trying to re-export a
     // crate in Rust 2018+
-    let path = path.clean(cx);
+    let path = clean_path(path, cx);
     let inner = if kind == hir::UseKind::Glob {
         if !denied {
             let mut visited = FxHashSet::default();
@@ -2252,24 +2251,19 @@ fn clean_maybe_renamed_foreign_item<'tcx>(
     })
 }
 
-impl<'tcx> Clean<'tcx, TypeBinding> for hir::TypeBinding<'tcx> {
-    fn clean(&self, cx: &mut DocContext<'tcx>) -> TypeBinding {
-        TypeBinding {
-            assoc: PathSegment { name: self.ident.name, args: self.gen_args.clean(cx) },
-            kind: self.kind.clean(cx),
-        }
-    }
-}
-
-impl<'tcx> Clean<'tcx, TypeBindingKind> for hir::TypeBindingKind<'tcx> {
-    fn clean(&self, cx: &mut DocContext<'tcx>) -> TypeBindingKind {
-        match *self {
+fn clean_type_binding<'tcx>(
+    type_binding: &hir::TypeBinding<'tcx>,
+    cx: &mut DocContext<'tcx>,
+) -> TypeBinding {
+    TypeBinding {
+        assoc: PathSegment { name: type_binding.ident.name, args: type_binding.gen_args.clean(cx) },
+        kind: match type_binding.kind {
             hir::TypeBindingKind::Equality { ref term } => {
                 TypeBindingKind::Equality { term: clean_hir_term(term, cx) }
             }
             hir::TypeBindingKind::Constraint { bounds } => TypeBindingKind::Constraint {
                 bounds: bounds.iter().filter_map(|b| b.clean(cx)).collect(),
             },
-        }
+        },
     }
 }