rustdoc: Clean Visibility outside of display_macro_source

This change should make the code a bit clearer and easier to change.

Author: camelid

src/librustdoc/clean/inline.rs

@@ -592,14 +592,9 @@ fn build_macro(
     match CStore::from_tcx(cx.tcx).load_macro_untracked(def_id, cx.sess()) {
         LoadedMacro::MacroDef(item_def, _) => {
             if let ast::ItemKind::MacroDef(ref def) = item_def.kind {
+                let vis = cx.tcx.visibility(import_def_id.unwrap_or(def_id)).clean(cx);
                 clean::MacroItem(clean::Macro {
-                    source: utils::display_macro_source(
-                        cx,
-                        name,
-                        def,
-                        def_id,
-                        cx.tcx.visibility(import_def_id.unwrap_or(def_id)),
-                    ),
+                    source: utils::display_macro_source(cx, name, def, def_id, vis),
                 })
             } else {
                 unreachable!()

src/librustdoc/clean/mod.rs

@@ -1792,9 +1792,12 @@ impl Clean<Vec<Item>> for (&hir::Item<'_>, Option<Symbol>) {
                 ItemKind::Fn(ref sig, ref generics, body_id) => {
                     clean_fn_or_proc_macro(item, sig, generics, body_id, &mut name, cx)
                 }
-                ItemKind::Macro(ref macro_def) => MacroItem(Macro {
-                    source: display_macro_source(cx, name, macro_def, def_id, item.vis),
-                }),
+                ItemKind::Macro(ref macro_def) => {
+                    let vis = item.vis.clean(cx);
+                    MacroItem(Macro {
+                        source: display_macro_source(cx, name, macro_def, def_id, vis),
+                    })
+                }
                 ItemKind::Trait(is_auto, unsafety, ref generics, bounds, item_ids) => {
                     let items = item_ids
                         .iter()

src/librustdoc/clean/utils.rs

@@ -529,7 +529,7 @@ pub(super) fn display_macro_source(
     name: Symbol,
     def: &ast::MacroDef,
     def_id: DefId,
-    vis: impl Clean<Visibility>,
+    vis: Visibility,
 ) -> String {
     let tts: Vec<_> = def.body.inner_tokens().into_trees().collect();
     // Extract the spans of all matchers. They represent the "interface" of the macro.
@@ -538,8 +538,6 @@ pub(super) fn display_macro_source(
     if def.macro_rules {
         format!("macro_rules! {} {{\n{}}}", name, render_macro_arms(matchers, ";"))
     } else {
-        let vis = vis.clean(cx);
-
         if matchers.len() <= 1 {
             format!(
                 "{}macro {}{} {{\n    ...\n}}",