[DO NOT MERGE] Document non-exported macros with --document-private-items

compiler/rustc_ast_lowering/src/item.rs

@@ -216,9 +216,9 @@ impl<'hir> LoweringContext<'_, 'hir> {
         let attrs = self.lower_attrs(&i.attrs);
 
         if let ItemKind::MacroDef(MacroDef { ref body, macro_rules }) = i.kind {
+            let hir_id = self.lower_node_id(i.id);
+            let body = P(self.lower_mac_args(body));
             if !macro_rules || self.sess.contains_name(&i.attrs, sym::macro_export) {
-                let hir_id = self.lower_node_id(i.id);
-                let body = P(self.lower_mac_args(body));
                 self.exported_macros.push(hir::MacroDef {
                     ident,
                     vis,
@@ -228,6 +228,14 @@ impl<'hir> LoweringContext<'_, 'hir> {
                     ast: MacroDef { body, macro_rules },
                 });
             } else {
+                self.non_exported_macros.push(hir::MacroDef {
+                    ident,
+                    vis,
+                    attrs,
+                    hir_id,
+                    span: i.span,
+                    ast: MacroDef { body, macro_rules },
+                });
                 self.non_exported_macro_attrs.extend(attrs.iter().cloned());
             }
             return None;

compiler/rustc_ast_lowering/src/lib.rs

@@ -103,6 +103,7 @@ struct LoweringContext<'a, 'hir: 'a> {
     impl_items: BTreeMap<hir::ImplItemId, hir::ImplItem<'hir>>,
     bodies: BTreeMap<hir::BodyId, hir::Body<'hir>>,
     exported_macros: Vec<hir::MacroDef<'hir>>,
+    non_exported_macros: Vec<hir::MacroDef<'hir>>,
     non_exported_macro_attrs: Vec<ast::Attribute>,
 
     trait_impls: BTreeMap<DefId, Vec<hir::HirId>>,
@@ -302,6 +303,7 @@ pub fn lower_crate<'a, 'hir>(
         trait_impls: BTreeMap::new(),
         modules: BTreeMap::new(),
         exported_macros: Vec::new(),
+        non_exported_macros: Vec::new(),
         non_exported_macro_attrs: Vec::new(),
         catch_scopes: Vec::new(),
         loop_scopes: Vec::new(),
@@ -582,6 +584,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
         hir::Crate {
             item: hir::CrateItem { module, attrs, span: c.span },
             exported_macros: self.arena.alloc_from_iter(self.exported_macros),
+            non_exported_macros: self.arena.alloc_from_iter(self.non_exported_macros),
             non_exported_macro_attrs: self.arena.alloc_from_iter(self.non_exported_macro_attrs),
             items: self.items,
             trait_items: self.trait_items,

compiler/rustc_hir/src/hir.rs

@@ -599,6 +599,7 @@ pub struct CrateItem<'hir> {
 pub struct Crate<'hir> {
     pub item: CrateItem<'hir>,
     pub exported_macros: &'hir [MacroDef<'hir>],
+    pub non_exported_macros: &'hir [MacroDef<'hir>],
     // Attributes from non-exported macros, kept only for collecting the library feature list.
     pub non_exported_macro_attrs: &'hir [Attribute],
 

compiler/rustc_hir/src/intravisit.rs

@@ -463,6 +463,7 @@ pub fn walk_crate<'v, V: Visitor<'v>>(visitor: &mut V, krate: &'v Crate<'v>) {
     visitor.visit_mod(&krate.item.module, krate.item.span, CRATE_HIR_ID);
     walk_list!(visitor, visit_attribute, krate.item.attrs);
     walk_list!(visitor, visit_macro_def, krate.exported_macros);
+    walk_list!(visitor, visit_macro_def, krate.non_exported_macros);
 }
 
 pub fn walk_macro_def<'v, V: Visitor<'v>>(visitor: &mut V, macro_def: &'v MacroDef<'v>) {

compiler/rustc_middle/src/hir/map/collector.rs

@@ -108,6 +108,7 @@ impl<'a, 'hir> NodeCollector<'a, 'hir> {
                 ref item,
                 // These fields are handled separately:
                 exported_macros: _,
+                non_exported_macros: _,
                 non_exported_macro_attrs: _,
                 items: _,
                 trait_items: _,

src/librustdoc/visit_ast.rs

@@ -74,6 +74,13 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
         module
             .macros
             .extend(krate.exported_macros.iter().map(|def| self.visit_local_macro(def, None)));
+        if self.cx.render_options.document_private {
+            // If `--document-private-items` is passed, also attach the crate's
+            // *non*-exported macros to the top-level module.
+            module
+                .macros
+                .extend(krate.non_exported_macros.iter().map(|def| self.visit_local_macro(def, None)));
+        }
         module.is_crate = true;
 
         self.cx.renderinfo.get_mut().exact_paths = self.exact_paths;

src/test/rustdoc/non-exported-macros.rs

@@ -0,0 +1,16 @@
+// compile-flags: --document-private-items
+
+fn foo_fn() {}
+
+pub fn pub_foo_fn() {}
+
+macro_rules! foo_macro {
+    () => { };
+}
+
+#[macro_export]
+macro_rules! exported_foo_macro {
+    () => { };
+}
+
+// TODO: add `@has` checks