Formatting.

compiler/rustc_hir/src/arena.rs

@@ -29,7 +29,7 @@ macro_rules! arena_types {
             [] field_pat: rustc_hir::FieldPat<$tcx>,
             [] fn_decl: rustc_hir::FnDecl<$tcx>,
             [] foreign_item: rustc_hir::ForeignItem<$tcx>,
-            [] foreign_item_ref: rustc_hir::ForeignItemRef<$tcx>,
+            [few] foreign_item_ref: rustc_hir::ForeignItemRef<$tcx>,
             [] impl_item_ref: rustc_hir::ImplItemRef<$tcx>,
             [few] inline_asm: rustc_hir::InlineAsm<$tcx>,
             [few] llvm_inline_asm: rustc_hir::LlvmInlineAsm<$tcx>,

compiler/rustc_hir/src/hir.rs

@@ -1855,7 +1855,7 @@ pub struct FnSig<'hir> {
 }
 
 // The bodies for items are stored "out of line", in a separate
-// hashmap in the `Crate`. Here we just record the node-id of the item
+// hashmap in the `Crate`. Here we just record the hir-id of the item
 // so it can fetched later.
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Encodable, Debug)]
 pub struct TraitItemId {
@@ -1899,7 +1899,7 @@ pub enum TraitItemKind<'hir> {
 }
 
 // The bodies for items are stored "out of line", in a separate
-// hashmap in the `Crate`. Here we just record the node-id of the item
+// hashmap in the `Crate`. Here we just record the hir-id of the item
 // so it can fetched later.
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Encodable, Debug)]
 pub struct ImplItemId {
@@ -2441,7 +2441,7 @@ impl VariantData<'hir> {
 }
 
 // The bodies for items are stored "out of line", in a separate
-// hashmap in the `Crate`. Here we just record the node-id of the item
+// hashmap in the `Crate`. Here we just record the hir-id of the item
 // so it can fetched later.
 #[derive(Copy, Clone, Encodable, Debug)]
 pub struct ItemId {
@@ -2624,7 +2624,7 @@ pub enum AssocItemKind {
 }
 
 // The bodies for items are stored "out of line", in a separate
-// hashmap in the `Crate`. Here we just record the node-id of the item
+// hashmap in the `Crate`. Here we just record the hir-id of the item
 // so it can fetched later.
 #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Encodable, Debug)]
 pub struct ForeignItemId {

compiler/rustc_hir/src/intravisit.rs

@@ -289,7 +289,7 @@ pub trait Visitor<'v>: Sized {
         walk_list!(self, visit_impl_item, opt_item);
     }
 
-    /// Like `visit_nested_item()`, but for impl items. See
+    /// Like `visit_nested_item()`, but for foreign items. See
     /// `visit_nested_item()` for advice on when to override this
     /// method.
     fn visit_nested_foreign_item(&mut self, id: ForeignItemId) {

compiler/rustc_passes/src/entry.rs

@@ -46,7 +46,9 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for EntryContext<'a, 'tcx> {
         // Entry fn is never a trait item.
     }
 
-    fn visit_foreign_item(&mut self, _: &'tcx ForeignItem<'tcx>) {}
+    fn visit_foreign_item(&mut self, _: &'tcx ForeignItem<'tcx>) {
+        // Entry fn is never a foreign item.
+    }
 }
 
 fn entry_fn(tcx: TyCtxt<'_>, cnum: CrateNum) -> Option<(LocalDefId, EntryFnType)> {

compiler/rustc_passes/src/reachable.rs

@@ -379,7 +379,9 @@ impl<'a, 'tcx> ItemLikeVisitor<'tcx> for CollectPrivateImplItemsVisitor<'a, 'tcx
         // processed in visit_item above
     }
 
-    fn visit_foreign_item(&mut self, _foreign_item: &hir::ForeignItem<'_>) {}
+    fn visit_foreign_item(&mut self, _foreign_item: &hir::ForeignItem<'_>) {
+        // We never export foreign functions as they have no body to export.
+    }
 }
 
 fn reachable_set<'tcx>(tcx: TyCtxt<'tcx>, crate_num: CrateNum) -> FxHashSet<LocalDefId> {