Rustdoc: use is_doc_hidden method on more places

Author: Kobzol

src/librustdoc/clean/inline.rs

@@ -17,7 +17,7 @@ use rustc_span::symbol::{kw, sym, Symbol};
 
 use crate::clean::{
     self, clean_fn_decl_from_did_and_sig, clean_ty_generics, utils, Attributes, AttributesExt,
-    Clean, ImplKind, ItemId, NestedAttributesExt, Type, Visibility,
+    Clean, ImplKind, ItemId, Type, Visibility,
 };
 use crate::core::DocContext;
 use crate::formats::item_type::ItemType;
@@ -421,7 +421,7 @@ crate fn build_impl(
                                 associated_trait.def_id,
                             )
                             .unwrap(); // SAFETY: For all impl items there exists trait item that has the same name.
-                        !tcx.get_attrs(trait_item.def_id).lists(sym::doc).has_word(sym::hidden)
+                        !tcx.is_doc_hidden(trait_item.def_id)
                     } else {
                         true
                     }
@@ -456,7 +456,7 @@ crate fn build_impl(
     let mut stack: Vec<&Type> = vec![&for_];
 
     if let Some(did) = trait_.as_ref().map(|t| t.def_id()) {
-        if tcx.get_attrs(did).lists(sym::doc).has_word(sym::hidden) {
+        if tcx.is_doc_hidden(did) {
             return;
         }
     }
@@ -466,7 +466,7 @@ crate fn build_impl(
 
     while let Some(ty) = stack.pop() {
         if let Some(did) = ty.def_id(&cx.cache) {
-            if tcx.get_attrs(did).lists(sym::doc).has_word(sym::hidden) {
+            if tcx.is_doc_hidden(did) {
                 return;
             }
         }

src/librustdoc/passes/collect_trait_impls.rs

@@ -47,7 +47,7 @@ crate fn collect_trait_impls(mut krate: Crate, cx: &mut DocContext<'_>) -> Crate
                 inline::build_impl(cx, None, def_id, None, &mut new_items);
 
                 // FIXME(eddyb) is this `doc(hidden)` check needed?
-                if !cx.tcx.get_attrs(def_id).lists(sym::doc).has_word(sym::hidden) {
+                if !cx.tcx.is_doc_hidden(def_id) {
                     let impls = get_auto_trait_and_blanket_impls(cx, def_id);
                     new_items.extend(impls.filter(|i| cx.inlined.insert(i.def_id)));
                 }
@@ -176,13 +176,7 @@ impl<'a, 'tcx> DocVisitor for SyntheticImplCollector<'a, 'tcx> {
     fn visit_item(&mut self, i: &Item) {
         if i.is_struct() || i.is_enum() || i.is_union() {
             // FIXME(eddyb) is this `doc(hidden)` check needed?
-            if !self
-                .cx
-                .tcx
-                .get_attrs(i.def_id.expect_def_id())
-                .lists(sym::doc)
-                .has_word(sym::hidden)
-            {
+            if !self.cx.tcx.is_doc_hidden(i.def_id.expect_def_id()) {
                 self.impls
                     .extend(get_auto_trait_and_blanket_impls(self.cx, i.def_id.expect_def_id()));
             }

src/librustdoc/visit_lib.rs

@@ -3,9 +3,6 @@ use rustc_hir::def::{DefKind, Res};
 use rustc_hir::def_id::{CrateNum, DefId, CRATE_DEF_INDEX};
 use rustc_middle::middle::privacy::{AccessLevel, AccessLevels};
 use rustc_middle::ty::TyCtxt;
-use rustc_span::symbol::sym;
-
-use crate::clean::{AttributesExt, NestedAttributesExt};
 
 // FIXME: this may not be exhaustive, but is sufficient for rustdocs current uses
 
@@ -39,7 +36,7 @@ impl<'a, 'tcx> LibEmbargoVisitor<'a, 'tcx> {
 
     // Updates node level and returns the updated level
     fn update(&mut self, did: DefId, level: Option<AccessLevel>) -> Option<AccessLevel> {
-        let is_hidden = self.tcx.get_attrs(did).lists(sym::doc).has_word(sym::hidden);
+        let is_hidden = self.tcx.is_doc_hidden(did);
 
         let old_level = self.access_levels.map.get(&did).cloned();
         // Accessibility levels can only grow