Factor out repeated visit_id calls.

Every `ItemKind` now has one.

Author: nnethercote

compiler/rustc_hir/src/intravisit.rs

@@ -532,29 +532,25 @@ pub fn walk_param<'v, V: Visitor<'v>>(visitor: &mut V, param: &'v Param<'v>) ->
 }
 
 pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item<'v>) -> V::Result {
+    try_visit!(visitor.visit_id(item.hir_id()));
     try_visit!(visitor.visit_ident(item.ident));
     match item.kind {
         ItemKind::ExternCrate(orig_name) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             visit_opt!(visitor, visit_name, orig_name);
         }
         ItemKind::Use(ref path, _) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_use(path, item.hir_id()));
         }
         ItemKind::Static(ref typ, _, body) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_ty_unambig(typ));
             try_visit!(visitor.visit_nested_body(body));
         }
         ItemKind::Const(ref typ, ref generics, body) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_ty_unambig(typ));
             try_visit!(visitor.visit_generics(generics));
             try_visit!(visitor.visit_nested_body(body));
         }
         ItemKind::Fn { sig, generics, body: body_id, .. } => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_fn(
                 FnKind::ItemFn(item.ident, generics, sig.header),
                 sig.decl,
@@ -563,32 +559,25 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item<'v>) -> V::
                 item.owner_id.def_id,
             ));
         }
-        ItemKind::Macro(..) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
-        }
+        ItemKind::Macro(..) => {}
         ItemKind::Mod(ref module) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_mod(module, item.span, item.hir_id()));
         }
         ItemKind::ForeignMod { abi: _, items } => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             walk_list!(visitor, visit_foreign_item_ref, items);
         }
         ItemKind::GlobalAsm { asm: _, fake_body } => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             // Visit the fake body, which contains the asm statement.
             // Therefore we should not visit the asm statement again
             // outside of the body, or some visitors won't have their
             // typeck results set correctly.
             try_visit!(visitor.visit_nested_body(fake_body));
         }
         ItemKind::TyAlias(ref ty, ref generics) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_ty_unambig(ty));
             try_visit!(visitor.visit_generics(generics));
         }
         ItemKind::Enum(ref enum_definition, ref generics) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_generics(generics));
             try_visit!(visitor.visit_enum_def(enum_definition));
         }
@@ -603,7 +592,6 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item<'v>) -> V::
             self_ty,
             items,
         }) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_generics(generics));
             visit_opt!(visitor, visit_trait_ref, of_trait);
             try_visit!(visitor.visit_ty_unambig(self_ty));
@@ -612,17 +600,14 @@ pub fn walk_item<'v, V: Visitor<'v>>(visitor: &mut V, item: &'v Item<'v>) -> V::
         ItemKind::Struct(ref struct_definition, ref generics)
         | ItemKind::Union(ref struct_definition, ref generics) => {
             try_visit!(visitor.visit_generics(generics));
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_variant_data(struct_definition));
         }
         ItemKind::Trait(.., ref generics, bounds, trait_item_refs) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_generics(generics));
             walk_list!(visitor, visit_param_bound, bounds);
             walk_list!(visitor, visit_trait_item_ref, trait_item_refs);
         }
         ItemKind::TraitAlias(ref generics, bounds) => {
-            try_visit!(visitor.visit_id(item.hir_id()));
             try_visit!(visitor.visit_generics(generics));
             walk_list!(visitor, visit_param_bound, bounds);
         }