Merge #6893

6893: Move to upstream `macro_rules!` model r=matklad a=jonas-schievink

This changes `macro_rules!` from being treated as a macro invocation to being a first-class item. It also disallows using an additional ident argument for regular macros, so `m! ident(...);` now fails to parse.

This matches upstream Rust, and makes the code somewhat simpler by removing repeated "is this a `macro_rules!` call" checks. It will also simplify allowing visibilities on macros, which is currently being proposed in https://github.com/rust-lang/rust/pull/78166.

Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>

Cargo.lock

@@ -1827,9 +1827,9 @@ checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
 
 [[package]]
 name = "ungrammar"
-version = "1.1.4"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "df0cd89993af555540e2436fc6adb8479b0dbe386339a136397952e9c89e17a9"
+checksum = "873186a460627379e7e28880a0d33b729c205634f6f021321f50b323235e62d7"
 
 [[package]]
 name = "unicase"

Cargo.toml

@@ -25,3 +25,5 @@ debug = 0 # Set this to 1 or 2 to get more useful backtraces in debugger.
 # chalk-solve = { path = "../chalk/chalk-solve" }
 # chalk-ir = { path = "../chalk/chalk-ir" }
 # chalk-recursive = { path = "../chalk/chalk-recursive" }
+
+# ungrammar = { path = "../ungrammar" }

crates/completion/src/render/macro_.rs

@@ -144,7 +144,7 @@ mod tests {
 use foo::<|>;
 //- /foo/lib.rs crate:foo
 #[macro_export]
-macro_rules frobnicate { () => () }
+macro_rules! frobnicate { () => () }
 "#,
             r#"
 use foo::frobnicate;
@@ -154,11 +154,11 @@ use foo::frobnicate;
         check_edit(
             "frobnicate!",
             r#"
-macro_rules frobnicate { () => () }
+macro_rules! frobnicate { () => () }
 fn main() { frob<|>!(); }
 "#,
             r#"
-macro_rules frobnicate { () => () }
+macro_rules! frobnicate { () => () }
 fn main() { frobnicate!(); }
 "#,
         );

crates/hir/src/has_source.rs

@@ -110,8 +110,8 @@ impl HasSource for TypeAlias {
     }
 }
 impl HasSource for MacroDef {
-    type Ast = ast::MacroCall;
+    type Ast = ast::MacroRules;
-    fn source(self, db: &dyn HirDatabase) -> InFile<ast::MacroCall> {
+    fn source(self, db: &dyn HirDatabase) -> InFile<ast::MacroRules> {
         InFile {
             file_id: self.id.ast_id.expect("MacroDef without ast_id").file_id,
             value: self.id.ast_id.expect("MacroDef without ast_id").to_node(db.upcast()),

crates/hir/src/semantics.rs

@@ -723,7 +723,7 @@ to_def_impls![
     (crate::EnumVariant, ast::Variant, enum_variant_to_def),
     (crate::TypeParam, ast::TypeParam, type_param_to_def),
     (crate::LifetimeParam, ast::LifetimeParam, lifetime_param_to_def),
-    (crate::MacroDef, ast::MacroCall, macro_call_to_def), // this one is dubious, not all calls are macros
+    (crate::MacroDef, ast::MacroRules, macro_rules_to_def),
     (crate::Local, ast::IdentPat, bind_pat_to_def),
 ];
 

crates/hir/src/semantics/source_to_def.rs

@@ -149,7 +149,10 @@ impl SourceToDefCtx<'_, '_> {
     }
 
     // FIXME: use DynMap as well?
-    pub(super) fn macro_call_to_def(&mut self, src: InFile<ast::MacroCall>) -> Option<MacroDefId> {
+    pub(super) fn macro_rules_to_def(
+        &mut self,
+        src: InFile<ast::MacroRules>,
+    ) -> Option<MacroDefId> {
         let kind = MacroDefKind::Declarative;
         let file_id = src.file_id.original_file(self.db.upcast());
         let krate = self.file_to_def(file_id)?.krate;

crates/hir_def/src/body/lower.rs

@@ -566,66 +566,52 @@ impl ExprCollector<'_> {
         syntax_ptr: AstPtr<ast::Expr>,
         mut collector: F,
     ) {
-        if let Some(name) = e.is_macro_rules().map(|it| it.as_name()) {
+        // File containing the macro call. Expansion errors will be attached here.
-            let mac = MacroDefId {
+        let outer_file = self.expander.current_file_id;
-                krate: Some(self.expander.module.krate),
-                ast_id: Some(self.expander.ast_id(&e)),
-                kind: MacroDefKind::Declarative,
-                local_inner: false,
-            };
-            self.body.item_scope.define_legacy_macro(name, mac);
 
-            // FIXME: do we still need to allocate this as missing ?
+        let macro_call = self.expander.to_source(AstPtr::new(&e));
-            collector(self, None);
+        let res = self.expander.enter_expand(self.db, Some(&self.body.item_scope), e);
-        } else {
-            // File containing the macro call. Expansion errors will be attached here.
-            let outer_file = self.expander.current_file_id;
 
-            let macro_call = self.expander.to_source(AstPtr::new(&e));
+        match &res.err {
-            let res = self.expander.enter_expand(self.db, Some(&self.body.item_scope), e);
+            Some(ExpandError::UnresolvedProcMacro) => {
-
+                self.source_map.diagnostics.push(BodyDiagnostic::UnresolvedProcMacro(
-            match &res.err {
+                    UnresolvedProcMacro {
-                Some(ExpandError::UnresolvedProcMacro) => {
-                    self.source_map.diagnostics.push(BodyDiagnostic::UnresolvedProcMacro(
-                        UnresolvedProcMacro {
-                            file: outer_file,
-                            node: syntax_ptr.into(),
-                            precise_location: None,
-                            macro_name: None,
-                        },
-                    ));
-                }
-                Some(err) => {
-                    self.source_map.diagnostics.push(BodyDiagnostic::MacroError(MacroError {
                         file: outer_file,
                         node: syntax_ptr.into(),
-                        message: err.to_string(),
+                        precise_location: None,
-                    }));
+                        macro_name: None,
-                }
+                    },
-                None => {}
+                ));
             }
-
+            Some(err) => {
-            match res.value {
+                self.source_map.diagnostics.push(BodyDiagnostic::MacroError(MacroError {
-                Some((mark, expansion)) => {
+                    file: outer_file,
-                    // FIXME: Statements are too complicated to recover from error for now.
+                    node: syntax_ptr.into(),
-                    // It is because we don't have any hygenine for local variable expansion right now.
+                    message: err.to_string(),
-                    if T::can_cast(syntax::SyntaxKind::MACRO_STMTS) && res.err.is_some() {
+                }));
-                        self.expander.exit(self.db, mark);
-                        collector(self, None);
-                    } else {
-                        self.source_map
-                            .expansions
-                            .insert(macro_call, self.expander.current_file_id);
-
-                        let item_tree = self.db.item_tree(self.expander.current_file_id);
-                        self.item_trees.insert(self.expander.current_file_id, item_tree);
-
-                        collector(self, Some(expansion));
-                        self.expander.exit(self.db, mark);
-                    }
-                }
-                None => collector(self, None),
             }
+            None => {}
+        }
+
+        match res.value {
+            Some((mark, expansion)) => {
+                // FIXME: Statements are too complicated to recover from error for now.
+                // It is because we don't have any hygenine for local variable expansion right now.
+                if T::can_cast(syntax::SyntaxKind::MACRO_STMTS) && res.err.is_some() {
+                    self.expander.exit(self.db, mark);
+                    collector(self, None);
+                } else {
+                    self.source_map.expansions.insert(macro_call, self.expander.current_file_id);
+
+                    let item_tree = self.db.item_tree(self.expander.current_file_id);
+                    self.item_trees.insert(self.expander.current_file_id, item_tree);
+
+                    let id = collector(self, Some(expansion));
+                    self.expander.exit(self.db, mark);
+                    id
+                }
+            }
+            None => collector(self, None),
         }
     }
 
@@ -785,26 +771,44 @@ impl ExprCollector<'_> {
                     | ast::Item::ExternCrate(_)
                     | ast::Item::Module(_)
                     | ast::Item::MacroCall(_) => return None,
+                    ast::Item::MacroRules(def) => {
+                        return Some(Either::Right(def));
+                    }
                 };
 
-                Some((def, name))
+                Some(Either::Left((def, name)))
             })
             .collect::<Vec<_>>();
 
-        for (def, name) in items {
+        for either in items {
-            self.body.item_scope.define_def(def);
+            match either {
-            if let Some(name) = name {
+                Either::Left((def, name)) => {
-                let vis = crate::visibility::Visibility::Public; // FIXME determine correctly
+                    self.body.item_scope.define_def(def);
-                let has_constructor = match def {
+                    if let Some(name) = name {
-                    ModuleDefId::AdtId(AdtId::StructId(s)) => {
+                        let vis = crate::visibility::Visibility::Public; // FIXME determine correctly
-                        self.db.struct_data(s).variant_data.kind() != StructKind::Record
+                        let has_constructor = match def {
+                            ModuleDefId::AdtId(AdtId::StructId(s)) => {
+                                self.db.struct_data(s).variant_data.kind() != StructKind::Record
+                            }
+                            _ => true,
+                        };
+                        self.body.item_scope.push_res(
+                            name.as_name(),
+                            crate::per_ns::PerNs::from_def(def, vis, has_constructor),
+                        );
                     }
-                    _ => true,
+                }
-                };
+                Either::Right(e) => {
-                self.body.item_scope.push_res(
+                    let mac = MacroDefId {
-                    name.as_name(),
+                        krate: Some(self.expander.module.krate),
-                    crate::per_ns::PerNs::from_def(def, vis, has_constructor),
+                        ast_id: Some(self.expander.ast_id(&e)),
-                );
+                        kind: MacroDefKind::Declarative,
+                        local_inner: false,
+                    };
+                    if let Some(name) = e.name() {
+                        self.body.item_scope.define_legacy_macro(name.as_name(), mac);
+                    }
+                }
             }
         }
     }

crates/hir_def/src/item_tree.rs

@@ -142,6 +142,7 @@ impl ItemTree {
                 type_aliases,
                 mods,
                 macro_calls,
+                macro_rules,
                 exprs,
                 vis,
                 generics,
@@ -162,6 +163,7 @@ impl ItemTree {
             type_aliases.shrink_to_fit();
             mods.shrink_to_fit();
             macro_calls.shrink_to_fit();
+            macro_rules.shrink_to_fit();
             exprs.shrink_to_fit();
 
             vis.arena.shrink_to_fit();
@@ -280,6 +282,7 @@ struct ItemTreeData {
     type_aliases: Arena<TypeAlias>,
     mods: Arena<Mod>,
     macro_calls: Arena<MacroCall>,
+    macro_rules: Arena<MacroRules>,
     exprs: Arena<Expr>,
 
     vis: ItemVisibilities,
@@ -427,6 +430,7 @@ mod_items! {
     TypeAlias in type_aliases -> ast::TypeAlias,
     Mod in mods -> ast::Module,
     MacroCall in macro_calls -> ast::MacroCall,
+    MacroRules in macro_rules -> ast::MacroRules,
 }
 
 macro_rules! impl_index {
@@ -629,17 +633,22 @@ pub enum ModKind {
 
 #[derive(Debug, Clone, Eq, PartialEq)]
 pub struct MacroCall {
-    /// For `macro_rules!` declarations, this is the name of the declared macro.
-    pub name: Option<Name>,
     /// Path to the called macro.
     pub path: ModPath,
+    pub ast_id: FileAstId<ast::MacroCall>,
+}
+
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub struct MacroRules {
+    /// For `macro_rules!` declarations, this is the name of the declared macro.
+    pub name: Name,
     /// Has `#[macro_export]`.
     pub is_export: bool,
     /// Has `#[macro_export(local_inner_macros)]`.
     pub is_local_inner: bool,
     /// Has `#[rustc_builtin_macro]`.
     pub is_builtin: bool,
-    pub ast_id: FileAstId<ast::MacroCall>,
+    pub ast_id: FileAstId<ast::MacroRules>,
 }
 
 // NB: There's no `FileAstId` for `Expr`. The only case where this would be useful is for array
@@ -670,7 +679,8 @@ impl ModItem {
             | ModItem::Static(_)
             | ModItem::Trait(_)
             | ModItem::Impl(_)
-            | ModItem::Mod(_) => None,
+            | ModItem::Mod(_)
+            | ModItem::MacroRules(_) => None,
             ModItem::MacroCall(call) => Some(AssocItem::MacroCall(*call)),
             ModItem::Const(konst) => Some(AssocItem::Const(*konst)),
             ModItem::TypeAlias(alias) => Some(AssocItem::TypeAlias(*alias)),
@@ -697,6 +707,7 @@ impl ModItem {
             ModItem::TypeAlias(it) => tree[it.index].ast_id().upcast(),
             ModItem::Mod(it) => tree[it.index].ast_id().upcast(),
             ModItem::MacroCall(it) => tree[it.index].ast_id().upcast(),
+            ModItem::MacroRules(it) => tree[it.index].ast_id().upcast(),
         }
     }
 }

crates/hir_def/src/item_tree/lower.rs

@@ -84,8 +84,7 @@ impl Ctx {
             | ast::Item::Fn(_)
             | ast::Item::TypeAlias(_)
             | ast::Item::Const(_)
-            | ast::Item::Static(_)
+            | ast::Item::Static(_) => {
-            | ast::Item::MacroCall(_) => {
                 // Skip this if we're already collecting inner items. We'll descend into all nodes
                 // already.
                 if !inner {
@@ -98,7 +97,11 @@ impl Ctx {
             ast::Item::Trait(_) | ast::Item::Impl(_) | ast::Item::ExternBlock(_) => {}
 
             // These don't have inner items.
-            ast::Item::Module(_) | ast::Item::ExternCrate(_) | ast::Item::Use(_) => {}
+            ast::Item::Module(_)
+            | ast::Item::ExternCrate(_)
+            | ast::Item::Use(_)
+            | ast::Item::MacroCall(_)
+            | ast::Item::MacroRules(_) => {}
         };
 
         let attrs = Attrs::new(item, &self.hygiene);
@@ -118,6 +121,7 @@ impl Ctx {
             )),
             ast::Item::ExternCrate(ast) => self.lower_extern_crate(ast).map(Into::into),
             ast::Item::MacroCall(ast) => self.lower_macro_call(ast).map(Into::into),
+            ast::Item::MacroRules(ast) => self.lower_macro_rules(ast).map(Into::into),
             ast::Item::ExternBlock(ast) => {
                 Some(ModItems(self.lower_extern_block(ast).into_iter().collect::<SmallVec<_>>()))
             }
@@ -525,9 +529,15 @@ impl Ctx {
     }
 
     fn lower_macro_call(&mut self, m: &ast::MacroCall) -> Option<FileItemTreeId<MacroCall>> {
-        let name = m.name().map(|it| it.as_name());
-        let attrs = Attrs::new(m, &self.hygiene);
         let path = ModPath::from_src(m.path()?, &self.hygiene)?;
+        let ast_id = self.source_ast_id_map.ast_id(m);
+        let res = MacroCall { path, ast_id };
+        Some(id(self.data().macro_calls.alloc(res)))
+    }
+
+    fn lower_macro_rules(&mut self, m: &ast::MacroRules) -> Option<FileItemTreeId<MacroRules>> {
+        let name = m.name().map(|it| it.as_name())?;
+        let attrs = Attrs::new(m, &self.hygiene);
 
         let ast_id = self.source_ast_id_map.ast_id(m);
 
@@ -547,8 +557,8 @@ impl Ctx {
         };
 
         let is_builtin = attrs.by_key("rustc_builtin_macro").exists();
-        let res = MacroCall { name, path, is_export, is_builtin, is_local_inner, ast_id };
+        let res = MacroRules { name, is_export, is_builtin, is_local_inner, ast_id };
-        Some(id(self.data().macro_calls.alloc(res)))
+        Some(id(self.data().macro_rules.alloc(res)))
     }
 
     fn lower_extern_block(&mut self, block: &ast::ExternBlock) -> Vec<ModItem> {

crates/hir_def/src/nameres/collector.rs

@@ -11,7 +11,7 @@ use hir_expand::{
     ast_id_map::FileAstId,
     builtin_derive::find_builtin_derive,
     builtin_macro::find_builtin_macro,
-    name::{name, AsName, Name},
+    name::{AsName, Name},
     proc_macro::ProcMacroExpander,
     HirFileId, MacroCallId, MacroDefId, MacroDefKind,
 };
@@ -25,7 +25,9 @@ use crate::{
     attr::Attrs,
     db::DefDatabase,
     item_scope::{ImportType, PerNsGlobImports},
-    item_tree::{self, ItemTree, ItemTreeId, MacroCall, Mod, ModItem, ModKind, StructDefKind},
+    item_tree::{
+        self, ItemTree, ItemTreeId, MacroCall, MacroRules, Mod, ModItem, ModKind, StructDefKind,
+    },
     nameres::{
         diagnostics::DefDiagnostic, mod_resolution::ModDir, path_resolution::ReachedFixedPoint,
         BuiltinShadowMode, CrateDefMap, ModuleData, ModuleOrigin, ResolveMode,
@@ -972,7 +974,8 @@ impl ModCollector<'_, '_> {
                         status: PartialResolvedImport::Unresolved,
                     })
                 }
-                ModItem::MacroCall(mac) => self.collect_macro(&self.item_tree[mac]),
+                ModItem::MacroCall(mac) => self.collect_macro_call(&self.item_tree[mac]),
+                ModItem::MacroRules(mac) => self.collect_macro_rules(&self.item_tree[mac]),
                 ModItem::Impl(imp) => {
                     let module = ModuleId {
                         krate: self.def_collector.def_map.krate,
@@ -1276,45 +1279,37 @@ impl ModCollector<'_, '_> {
         self.def_collector.resolve_proc_macro(&macro_name);
     }
 
-    fn collect_macro(&mut self, mac: &MacroCall) {
+    fn collect_macro_rules(&mut self, mac: &MacroRules) {
-        let mut ast_id = AstIdWithPath::new(self.file_id, mac.ast_id, mac.path.clone());
+        let ast_id = InFile::new(self.file_id, mac.ast_id);
 
-        // Case 0: builtin macros
+        // Case 1: builtin macros
         if mac.is_builtin {
-            if let Some(name) = &mac.name {
+            let krate = self.def_collector.def_map.krate;
-                let krate = self.def_collector.def_map.krate;
+            if let Some(macro_id) = find_builtin_macro(&mac.name, krate, ast_id) {
-                if let Some(macro_id) = find_builtin_macro(name, krate, ast_id.ast_id) {
-                    self.def_collector.define_macro(
-                        self.module_id,
-                        name.clone(),
-                        macro_id,
-                        mac.is_export,
-                    );
-                    return;
-                }
-            }
-        }
-
-        // Case 1: macro rules, define a macro in crate-global mutable scope
-        if is_macro_rules(&mac.path) {
-            if let Some(name) = &mac.name {
-                let macro_id = MacroDefId {
-                    ast_id: Some(ast_id.ast_id),
-                    krate: Some(self.def_collector.def_map.krate),
-                    kind: MacroDefKind::Declarative,
-                    local_inner: mac.is_local_inner,
-                };
                 self.def_collector.define_macro(
                     self.module_id,
-                    name.clone(),
+                    mac.name.clone(),
                     macro_id,
                     mac.is_export,
                 );
+                return;
             }
-            return;
         }
 
-        // Case 2: try to resolve in legacy scope and expand macro_rules
+        // Case 2: normal `macro_rules!` macro
+        let macro_id = MacroDefId {
+            ast_id: Some(ast_id),
+            krate: Some(self.def_collector.def_map.krate),
+            kind: MacroDefKind::Declarative,
+            local_inner: mac.is_local_inner,
+        };
+        self.def_collector.define_macro(self.module_id, mac.name.clone(), macro_id, mac.is_export);
+    }
+
+    fn collect_macro_call(&mut self, mac: &MacroCall) {
+        let mut ast_id = AstIdWithPath::new(self.file_id, mac.ast_id, mac.path.clone());
+
+        // Case 1: try to resolve in legacy scope and expand macro_rules
         if let Some(macro_call_id) =
             ast_id.as_call_id(self.def_collector.db, self.def_collector.def_map.krate, |path| {
                 path.as_ident().and_then(|name| {
@@ -1332,7 +1327,7 @@ impl ModCollector<'_, '_> {
             return;
         }
 
-        // Case 3: resolve in module scope, expand during name resolution.
+        // Case 2: resolve in module scope, expand during name resolution.
         // We rewrite simple path `macro_name` to `self::macro_name` to force resolve in module scope only.
         if ast_id.path.is_ident() {
             ast_id.path.kind = PathKind::Super(0);
@@ -1370,10 +1365,6 @@ impl ModCollector<'_, '_> {
     }
 }
 
-fn is_macro_rules(path: &ModPath) -> bool {
-    path.as_ident() == Some(&name![macro_rules])
-}
-
 #[cfg(test)]
 mod tests {
     use crate::{db::DefDatabase, test_db::TestDB};

crates/hir_def/src/path/lower.rs

@@ -122,11 +122,9 @@ pub(super) fn lower_path(mut path: ast::Path, hygiene: &Hygiene) -> Option<Path>
     // https://github.com/rust-lang/rust/blob/614f273e9388ddd7804d5cbc80b8865068a3744e/src/librustc_resolve/macros.rs#L456
     // We follow what it did anyway :)
     if segments.len() == 1 && kind == PathKind::Plain {
-        if let Some(macro_call) = path.syntax().parent().and_then(ast::MacroCall::cast) {
+        if let Some(_macro_call) = path.syntax().parent().and_then(ast::MacroCall::cast) {
-            if macro_call.is_bang() {
+            if let Some(crate_id) = hygiene.local_inner_macros() {
-                if let Some(crate_id) = hygiene.local_inner_macros() {
+                kind = PathKind::DollarCrate(crate_id);
-                    kind = PathKind::DollarCrate(crate_id);
-                }
             }
         }
     }

crates/hir_expand/src/builtin_macro.rs

@@ -63,7 +63,7 @@ macro_rules! register_builtin {
 pub fn find_builtin_macro(
     ident: &name::Name,
     krate: CrateId,
-    ast_id: AstId<ast::MacroCall>,
+    ast_id: AstId<ast::MacroRules>,
 ) -> Option<MacroDefId> {
     let kind = find_by_name(ident)?;
 
@@ -515,12 +515,16 @@ mod tests {
     fn expand_builtin_macro(ra_fixture: &str) -> String {
         let (db, file_id) = TestDB::with_single_file(&ra_fixture);
         let parsed = db.parse(file_id);
+        let macro_rules: Vec<_> =
+            parsed.syntax_node().descendants().filter_map(ast::MacroRules::cast).collect();
         let macro_calls: Vec<_> =
             parsed.syntax_node().descendants().filter_map(ast::MacroCall::cast).collect();
 
         let ast_id_map = db.ast_id_map(file_id.into());
 
-        let expander = find_by_name(&macro_calls[0].name().unwrap().as_name()).unwrap();
+        assert_eq!(macro_rules.len(), 1, "test must contain exactly 1 `macro_rules!`");
+        assert_eq!(macro_calls.len(), 1, "test must contain exactly 1 macro call");
+        let expander = find_by_name(&macro_rules[0].name().unwrap().as_name()).unwrap();
 
         let krate = CrateId(0);
         let file_id = match expander {
@@ -528,7 +532,7 @@ mod tests {
                 // the first one should be a macro_rules
                 let def = MacroDefId {
                     krate: Some(CrateId(0)),
-                    ast_id: Some(AstId::new(file_id.into(), ast_id_map.ast_id(&macro_calls[0]))),
+                    ast_id: Some(AstId::new(file_id.into(), ast_id_map.ast_id(&macro_rules[0]))),
                     kind: MacroDefKind::BuiltIn(expander),
                     local_inner: false,
                 };
@@ -538,7 +542,7 @@ mod tests {
                     krate,
                     kind: MacroCallKind::FnLike(AstId::new(
                         file_id.into(),
-                        ast_id_map.ast_id(&macro_calls[1]),
+                        ast_id_map.ast_id(&macro_calls[0]),
                     )),
                 };
 
@@ -549,12 +553,12 @@ mod tests {
                 // the first one should be a macro_rules
                 let def = MacroDefId {
                     krate: Some(krate),
-                    ast_id: Some(AstId::new(file_id.into(), ast_id_map.ast_id(&macro_calls[0]))),
+                    ast_id: Some(AstId::new(file_id.into(), ast_id_map.ast_id(&macro_rules[0]))),
                     kind: MacroDefKind::BuiltInEager(expander),
                     local_inner: false,
                 };
 
-                let args = macro_calls[1].token_tree().unwrap();
+                let args = macro_calls[0].token_tree().unwrap();
                 let parsed_args = mbe::ast_to_token_tree(&args).unwrap().0;
 
                 let arg_id = db.intern_eager_expansion({

crates/hir_expand/src/lib.rs

@@ -228,7 +228,7 @@ pub struct MacroDefId {
     // (which will probably require touching this code), we can instead use
     // that (and also remove the hacks for resolving built-in derives).
     pub krate: Option<CrateId>,
-    pub ast_id: Option<AstId<ast::MacroCall>>,
+    pub ast_id: Option<AstId<ast::MacroRules>>,
     pub kind: MacroDefKind,
 
     pub local_inner: bool,

crates/hir_ty/src/tests/macros.rs

@@ -413,7 +413,6 @@ fn infer_local_macro() {
         expect![[r#"
             !0..6 '1usize': usize
             10..89 '{     ...!(); }': ()
-            16..65 'macro_...     }': {unknown}
             74..76 '_a': usize
         "#]],
     );

crates/ide/src/file_structure.rs

@@ -150,13 +150,7 @@ fn structure_node(node: &SyntaxNode) -> Option<StructureNode> {
                 };
                 Some(node)
             },
-            ast::MacroCall(it) => {
+            ast::MacroRules(it) => decl(it),
-                match it.path().and_then(|it| it.segment()).and_then(|it| it.name_ref()) {
-                    Some(path_segment) if path_segment.text() == "macro_rules"
-                    => decl(it),
-                    _ => None,
-                }
-            },
             _ => None,
         }
     }
@@ -380,7 +374,7 @@ fn very_obsolete() {}
                         label: "mc",
                         navigation_range: 284..286,
                         node_range: 271..303,
-                        kind: MACRO_CALL,
+                        kind: MACRO_RULES,
                         detail: None,
                         deprecated: false,
                     },
@@ -389,7 +383,7 @@ fn very_obsolete() {}
                         label: "mcexp",
                         navigation_range: 334..339,
                         node_range: 305..356,
-                        kind: MACRO_CALL,
+                        kind: MACRO_RULES,
                         detail: None,
                         deprecated: false,
                     },
@@ -398,7 +392,7 @@ fn very_obsolete() {}
                         label: "mcexp",
                         navigation_range: 387..392,
                         node_range: 358..409,
-                        kind: MACRO_CALL,
+                        kind: MACRO_RULES,
                         detail: None,
                         deprecated: false,
                     },

crates/ide/src/references.rs

@@ -770,7 +770,7 @@ fn foo() {
 }
 "#,
             expect![[r#"
-                m1 MACRO_CALL FileId(0) 0..46 29..31 Other
+                m1 MACRO_RULES FileId(0) 0..46 29..31 Other
 
                 FileId(0) 63..65 StructLiteral
                 FileId(0) 73..75 StructLiteral

crates/ide/src/syntax_highlighting.rs

@@ -74,6 +74,7 @@ pub(crate) fn highlight(
     let mut stack = HighlightedRangeStack::new();
 
     let mut current_macro_call: Option<ast::MacroCall> = None;
+    let mut current_macro_rules: Option<ast::MacroRules> = None;
     let mut format_string_highlighter = FormatStringHighlighter::default();
     let mut macro_rules_highlighter = MacroRulesHighlighter::default();
     let mut inside_attribute = false;
@@ -106,28 +107,26 @@ pub(crate) fn highlight(
                         binding_hash: None,
                     });
                 }
-                if let Some(name) = mc.is_macro_rules() {
-                    macro_rules_highlighter.init();
-                    if let Some((highlight, binding_hash)) = highlight_element(
-                        &sema,
-                        &mut bindings_shadow_count,
-                        syntactic_name_ref_highlighting,
-                        name.syntax().clone().into(),
-                    ) {
-                        stack.add(HighlightedRange {
-                            range: name.syntax().text_range(),
-                            highlight,
-                            binding_hash,
-                        });
-                    }
-                }
                 current_macro_call = Some(mc.clone());
                 continue;
             }
             WalkEvent::Leave(Some(mc)) => {
-                assert!(current_macro_call == Some(mc));
+                assert_eq!(current_macro_call, Some(mc));
                 current_macro_call = None;
                 format_string_highlighter = FormatStringHighlighter::default();
+            }
+            _ => (),
+        }
+
+        match event.clone().map(|it| it.into_node().and_then(ast::MacroRules::cast)) {
+            WalkEvent::Enter(Some(mac)) => {
+                macro_rules_highlighter.init();
+                current_macro_rules = Some(mac);
+                continue;
+            }
+            WalkEvent::Leave(Some(mac)) => {
+                assert_eq!(current_macro_rules, Some(mac));
+                current_macro_rules = None;
                 macro_rules_highlighter = MacroRulesHighlighter::default();
             }
             _ => (),
@@ -163,6 +162,12 @@ pub(crate) fn highlight(
 
         let range = element.text_range();
 
+        if current_macro_rules.is_some() {
+            if let Some(tok) = element.as_token() {
+                macro_rules_highlighter.advance(tok);
+            }
+        }
+
         let element_to_highlight = if current_macro_call.is_some() && element.kind() != COMMENT {
             // Inside a macro -- expand it first
             let token = match element.clone().into_token() {
@@ -173,9 +178,6 @@ pub(crate) fn highlight(
             let parent = token.parent();
 
             format_string_highlighter.check_for_format_string(&parent);
-            if let Some(tok) = element.as_token() {
-                macro_rules_highlighter.advance(tok);
-            }
 
             // We only care Name and Name_ref
             match (token.kind(), parent.kind()) {
@@ -386,10 +388,14 @@ impl HighlightedRangeStack {
         let mut res = self.stack.pop().unwrap();
         res.sort_by_key(|range| range.range.start());
         // Check that ranges are sorted and disjoint
-        assert!(res
+        for (left, right) in res.iter().zip(res.iter().skip(1)) {
-            .iter()
+            assert!(
-            .zip(res.iter().skip(1))
+                left.range.end() <= right.range.start(),
-            .all(|(left, right)| left.range.end() <= right.range.start()));
+                "left: {:#?}, right: {:#?}",
+                left,
+                right
+            );
+        }
         res
     }
 }

crates/ide/src/syntax_highlighting/test_data/highlight_doctest.html

@@ -95,7 +95,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 <span class="comment documentation">/// ```</span>
 <span class="comment documentation">/// </span><span class="macro injected">noop!</span><span class="punctuation injected">(</span><span class="numeric_literal injected">1</span><span class="punctuation injected">)</span><span class="punctuation injected">;</span><span class="punctuation injected">
 </span><span class="comment documentation">/// ```</span>
-<span class="macro">macro_rules!</span> <span class="macro declaration">noop</span> <span class="punctuation">{</span>
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">noop</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span>expr<span class="punctuation">:</span>expr<span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span>
         <span class="punctuation">$</span>expr
     <span class="punctuation">}</span>

crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

@@ -35,13 +35,13 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
 
 .unresolved_reference { color: #FC5555; text-decoration: wavy underline; }
 </style>
-<pre><code><span class="macro">macro_rules!</span> <span class="macro declaration">println</span> <span class="punctuation">{</span>
+<pre><code><span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">println</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span><span class="punctuation">(</span><span class="punctuation">$</span>arg<span class="punctuation">:</span>tt<span class="punctuation">)</span><span class="punctuation">*</span><span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">(</span><span class="punctuation">{</span>
         <span class="punctuation">$</span>crate<span class="punctuation">:</span><span class="punctuation">:</span>io<span class="punctuation">:</span><span class="punctuation">:</span>_print<span class="punctuation">(</span><span class="punctuation">$</span>crate<span class="punctuation">:</span><span class="punctuation">:</span>format_args_nl<span class="punctuation">!</span><span class="punctuation">(</span><span class="punctuation">$</span><span class="punctuation">(</span><span class="punctuation">$</span>arg<span class="punctuation">)</span><span class="punctuation">*</span><span class="punctuation">)</span><span class="punctuation">)</span><span class="punctuation">;</span>
     <span class="punctuation">}</span><span class="punctuation">)</span>
 <span class="punctuation">}</span>
-#[rustc_builtin_macro]
+<span class="attribute attribute">#</span><span class="attribute attribute">[</span><span class="function attribute">rustc_builtin_macro</span><span class="attribute attribute">]</span>
-<span class="macro">macro_rules!</span> <span class="macro declaration">format_args_nl</span> <span class="punctuation">{</span>
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">format_args_nl</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span>fmt<span class="punctuation">:</span>expr<span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">{</span> <span class="comment">/* compiler built-in */</span> <span class="punctuation">}</span><span class="punctuation">}</span><span class="punctuation">;</span>
     <span class="punctuation">(</span><span class="punctuation">$</span>fmt<span class="punctuation">:</span>expr<span class="punctuation">,</span> <span class="punctuation">$</span><span class="punctuation">(</span><span class="punctuation">$</span>args<span class="punctuation">:</span>tt<span class="punctuation">)</span><span class="punctuation">*</span><span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">{</span> <span class="comment">/* compiler built-in */</span> <span class="punctuation">}</span><span class="punctuation">}</span><span class="punctuation">;</span>
 <span class="punctuation">}</span>

crates/ide/src/syntax_highlighting/test_data/highlighting.html

@@ -125,7 +125,7 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="keyword">let</span> <span class="variable declaration">bar</span> <span class="operator">=</span> <span class="function">foobar</span><span class="punctuation">(</span><span class="punctuation">)</span><span class="punctuation">;</span>
 <span class="punctuation">}</span>
 
-<span class="macro">macro_rules!</span> <span class="macro declaration">def_fn</span> <span class="punctuation">{</span>
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">def_fn</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span><span class="punctuation">(</span><span class="punctuation">$</span>tt<span class="punctuation">:</span>tt<span class="punctuation">)</span><span class="punctuation">*</span><span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span><span class="punctuation">$</span><span class="punctuation">(</span><span class="punctuation">$</span>tt<span class="punctuation">)</span><span class="punctuation">*</span><span class="punctuation">}</span>
 <span class="punctuation">}</span>
 
@@ -135,13 +135,13 @@ pre                 { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
     <span class="punctuation">}</span>
 <span class="punctuation">}</span>
 
-<span class="macro">macro_rules!</span> <span class="macro declaration">noop</span> <span class="punctuation">{</span>
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">noop</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span>expr<span class="punctuation">:</span>expr<span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">{</span>
         <span class="punctuation">$</span>expr
     <span class="punctuation">}</span>
 <span class="punctuation">}</span>
 
-<span class="macro">macro_rules!</span> <span class="macro declaration">keyword_frag</span> <span class="punctuation">{</span>
+<span class="keyword">macro_rules</span><span class="punctuation">!</span> <span class="macro declaration">keyword_frag</span> <span class="punctuation">{</span>
     <span class="punctuation">(</span><span class="punctuation">$</span>type<span class="punctuation">:</span>ty<span class="punctuation">)</span> <span class="operator">=</span><span class="punctuation">&gt;</span> <span class="punctuation">(</span><span class="punctuation">$</span>type<span class="punctuation">)</span>
 <span class="punctuation">}</span>
 

crates/ide_db/src/defs.rs

@@ -217,7 +217,7 @@ impl NameClass {
                     let def: hir::TypeAlias = sema.to_def(&it)?;
                     Some(NameClass::Definition(Definition::ModuleDef(def.into())))
                 },
-                ast::MacroCall(it) => {
+                ast::MacroRules(it) => {
                     let def = sema.to_def(&it)?;
                     Some(NameClass::Definition(Definition::Macro(def)))
                 },

crates/ide_db/src/symbol_index.rs

@@ -404,13 +404,7 @@ fn to_symbol(node: &SyntaxNode) -> Option<(SmolStr, SyntaxNodePtr, TextRange)> {
             ast::TypeAlias(it) => decl(it),
             ast::Const(it) => decl(it),
             ast::Static(it) => decl(it),
-            ast::MacroCall(it) => {
+            ast::MacroRules(it) => decl(it),
-                if it.is_macro_rules().is_some() {
-                    decl(it)
-                } else {
-                    None
-                }
-            },
             _ => None,
         }
     }

crates/mbe/src/mbe_expander.rs

@@ -163,7 +163,7 @@ mod tests {
     fn create_rules(macro_definition: &str) -> crate::MacroRules {
         let source_file = ast::SourceFile::parse(macro_definition).ok().unwrap();
         let macro_definition =
-            source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
+            source_file.syntax().descendants().find_map(ast::MacroRules::cast).unwrap();
 
         let (definition_tt, _) =
             ast_to_token_tree(&macro_definition.token_tree().unwrap()).unwrap();

crates/mbe/src/tests.rs

@@ -48,7 +48,7 @@ mod rule_parsing {
         let macro_definition = format!(" macro_rules! m {{ {} }} ", arm_definition);
         let source_file = ast::SourceFile::parse(&macro_definition).ok().unwrap();
         let macro_definition =
-            source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
+            source_file.syntax().descendants().find_map(ast::MacroRules::cast).unwrap();
 
         let (definition_tt, _) =
             ast_to_token_tree(&macro_definition.token_tree().unwrap()).unwrap();
@@ -1668,7 +1668,7 @@ impl MacroFixture {
 fn parse_macro_to_tt(ra_fixture: &str) -> tt::Subtree {
     let source_file = ast::SourceFile::parse(ra_fixture).ok().unwrap();
     let macro_definition =
-        source_file.syntax().descendants().find_map(ast::MacroCall::cast).unwrap();
+        source_file.syntax().descendants().find_map(ast::MacroRules::cast).unwrap();
 
     let (definition_tt, _) = ast_to_token_tree(&macro_definition.token_tree().unwrap()).unwrap();
 

crates/parser/src/grammar/items.rs

@@ -232,6 +232,9 @@ fn items_without_modifiers(p: &mut Parser, m: Marker) -> Result<(), Marker> {
         T![macro] => {
             macro_def(p, m);
         }
+        IDENT if p.at_contextual_kw("macro_rules") && p.nth(1) == BANG => {
+            macro_rules(p, m);
+        }
         IDENT if p.at_contextual_kw("union") && p.nth(1) == IDENT => {
             // test union_items
             // union Foo {}
@@ -363,6 +366,34 @@ pub(crate) fn item_list(p: &mut Parser) {
     m.complete(p, ITEM_LIST);
 }
 
+fn macro_rules(p: &mut Parser, m: Marker) {
+    assert!(p.at_contextual_kw("macro_rules"));
+    p.bump_remap(T![macro_rules]);
+    p.expect(T![!]);
+
+    if p.at(IDENT) {
+        name(p);
+    }
+    // Special-case `macro_rules! try`.
+    // This is a hack until we do proper edition support
+
+    // test try_macro_rules
+    // macro_rules! try { () => {} }
+    if p.at(T![try]) {
+        let m = p.start();
+        p.bump_remap(IDENT);
+        m.complete(p, NAME);
+    }
+
+    match p.current() {
+        T!['{'] => {
+            token_tree(p);
+        }
+        _ => p.error("expected `{`"),
+    }
+    m.complete(p, MACRO_RULES);
+}
+
 // test macro_def
 // macro m { ($i:ident) => {} }
 // macro m($i:ident) {}
@@ -394,19 +425,6 @@ fn macro_call(p: &mut Parser) -> BlockLike {
 
 pub(super) fn macro_call_after_excl(p: &mut Parser) -> BlockLike {
     p.expect(T![!]);
-    if p.at(IDENT) {
-        name(p);
-    }
-    // Special-case `macro_rules! try`.
-    // This is a hack until we do proper edition support
-
-    // test try_macro_rules
-    // macro_rules! try { () => {} }
-    if p.at(T![try]) {
-        let m = p.start();
-        p.bump_remap(IDENT);
-        m.complete(p, NAME);
-    }
 
     match p.current() {
         T!['{'] => {

crates/parser/src/syntax_kind/generated.rs

@@ -106,6 +106,7 @@ pub enum SyntaxKind {
     EXISTENTIAL_KW,
     UNION_KW,
     RAW_KW,
+    MACRO_RULES_KW,
     INT_NUMBER,
     FLOAT_NUMBER,
     CHAR,
@@ -135,6 +136,8 @@ pub enum SyntaxKind {
     IMPL,
     TYPE_ALIAS,
     MACRO_CALL,
+    MACRO_RULES,
+    MACRO_ARM,
     TOKEN_TREE,
     MACRO_DEF,
     PAREN_TYPE,
@@ -258,7 +261,7 @@ impl SyntaxKind {
             | IMPL_KW | IN_KW | LET_KW | LOOP_KW | MACRO_KW | MATCH_KW | MOD_KW | MOVE_KW
             | MUT_KW | PUB_KW | REF_KW | RETURN_KW | SELF_KW | STATIC_KW | STRUCT_KW | SUPER_KW
             | TRAIT_KW | TRUE_KW | TRY_KW | TYPE_KW | UNSAFE_KW | USE_KW | WHERE_KW | WHILE_KW
-            | AUTO_KW | DEFAULT_KW | EXISTENTIAL_KW | UNION_KW | RAW_KW => true,
+            | AUTO_KW | DEFAULT_KW | EXISTENTIAL_KW | UNION_KW | RAW_KW | MACRO_RULES_KW => true,
             _ => false,
         }
     }
@@ -361,4 +364,4 @@ impl SyntaxKind {
     }
 }
 #[macro_export]
-macro_rules ! T { [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [existential] => { $ crate :: SyntaxKind :: EXISTENTIAL_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [lifetime] => { $ crate :: SyntaxKind :: LIFETIME } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; }
+macro_rules ! T { [;] => { $ crate :: SyntaxKind :: SEMICOLON } ; [,] => { $ crate :: SyntaxKind :: COMMA } ; ['('] => { $ crate :: SyntaxKind :: L_PAREN } ; [')'] => { $ crate :: SyntaxKind :: R_PAREN } ; ['{'] => { $ crate :: SyntaxKind :: L_CURLY } ; ['}'] => { $ crate :: SyntaxKind :: R_CURLY } ; ['['] => { $ crate :: SyntaxKind :: L_BRACK } ; [']'] => { $ crate :: SyntaxKind :: R_BRACK } ; [<] => { $ crate :: SyntaxKind :: L_ANGLE } ; [>] => { $ crate :: SyntaxKind :: R_ANGLE } ; [@] => { $ crate :: SyntaxKind :: AT } ; [#] => { $ crate :: SyntaxKind :: POUND } ; [~] => { $ crate :: SyntaxKind :: TILDE } ; [?] => { $ crate :: SyntaxKind :: QUESTION } ; [$] => { $ crate :: SyntaxKind :: DOLLAR } ; [&] => { $ crate :: SyntaxKind :: AMP } ; [|] => { $ crate :: SyntaxKind :: PIPE } ; [+] => { $ crate :: SyntaxKind :: PLUS } ; [*] => { $ crate :: SyntaxKind :: STAR } ; [/] => { $ crate :: SyntaxKind :: SLASH } ; [^] => { $ crate :: SyntaxKind :: CARET } ; [%] => { $ crate :: SyntaxKind :: PERCENT } ; [_] => { $ crate :: SyntaxKind :: UNDERSCORE } ; [.] => { $ crate :: SyntaxKind :: DOT } ; [..] => { $ crate :: SyntaxKind :: DOT2 } ; [...] => { $ crate :: SyntaxKind :: DOT3 } ; [..=] => { $ crate :: SyntaxKind :: DOT2EQ } ; [:] => { $ crate :: SyntaxKind :: COLON } ; [::] => { $ crate :: SyntaxKind :: COLON2 } ; [=] => { $ crate :: SyntaxKind :: EQ } ; [==] => { $ crate :: SyntaxKind :: EQ2 } ; [=>] => { $ crate :: SyntaxKind :: FAT_ARROW } ; [!] => { $ crate :: SyntaxKind :: BANG } ; [!=] => { $ crate :: SyntaxKind :: NEQ } ; [-] => { $ crate :: SyntaxKind :: MINUS } ; [->] => { $ crate :: SyntaxKind :: THIN_ARROW } ; [<=] => { $ crate :: SyntaxKind :: LTEQ } ; [>=] => { $ crate :: SyntaxKind :: GTEQ } ; [+=] => { $ crate :: SyntaxKind :: PLUSEQ } ; [-=] => { $ crate :: SyntaxKind :: MINUSEQ } ; [|=] => { $ crate :: SyntaxKind :: PIPEEQ } ; [&=] => { $ crate :: SyntaxKind :: AMPEQ } ; [^=] => { $ crate :: SyntaxKind :: CARETEQ } ; [/=] => { $ crate :: SyntaxKind :: SLASHEQ } ; [*=] => { $ crate :: SyntaxKind :: STAREQ } ; [%=] => { $ crate :: SyntaxKind :: PERCENTEQ } ; [&&] => { $ crate :: SyntaxKind :: AMP2 } ; [||] => { $ crate :: SyntaxKind :: PIPE2 } ; [<<] => { $ crate :: SyntaxKind :: SHL } ; [>>] => { $ crate :: SyntaxKind :: SHR } ; [<<=] => { $ crate :: SyntaxKind :: SHLEQ } ; [>>=] => { $ crate :: SyntaxKind :: SHREQ } ; [as] => { $ crate :: SyntaxKind :: AS_KW } ; [async] => { $ crate :: SyntaxKind :: ASYNC_KW } ; [await] => { $ crate :: SyntaxKind :: AWAIT_KW } ; [box] => { $ crate :: SyntaxKind :: BOX_KW } ; [break] => { $ crate :: SyntaxKind :: BREAK_KW } ; [const] => { $ crate :: SyntaxKind :: CONST_KW } ; [continue] => { $ crate :: SyntaxKind :: CONTINUE_KW } ; [crate] => { $ crate :: SyntaxKind :: CRATE_KW } ; [dyn] => { $ crate :: SyntaxKind :: DYN_KW } ; [else] => { $ crate :: SyntaxKind :: ELSE_KW } ; [enum] => { $ crate :: SyntaxKind :: ENUM_KW } ; [extern] => { $ crate :: SyntaxKind :: EXTERN_KW } ; [false] => { $ crate :: SyntaxKind :: FALSE_KW } ; [fn] => { $ crate :: SyntaxKind :: FN_KW } ; [for] => { $ crate :: SyntaxKind :: FOR_KW } ; [if] => { $ crate :: SyntaxKind :: IF_KW } ; [impl] => { $ crate :: SyntaxKind :: IMPL_KW } ; [in] => { $ crate :: SyntaxKind :: IN_KW } ; [let] => { $ crate :: SyntaxKind :: LET_KW } ; [loop] => { $ crate :: SyntaxKind :: LOOP_KW } ; [macro] => { $ crate :: SyntaxKind :: MACRO_KW } ; [match] => { $ crate :: SyntaxKind :: MATCH_KW } ; [mod] => { $ crate :: SyntaxKind :: MOD_KW } ; [move] => { $ crate :: SyntaxKind :: MOVE_KW } ; [mut] => { $ crate :: SyntaxKind :: MUT_KW } ; [pub] => { $ crate :: SyntaxKind :: PUB_KW } ; [ref] => { $ crate :: SyntaxKind :: REF_KW } ; [return] => { $ crate :: SyntaxKind :: RETURN_KW } ; [self] => { $ crate :: SyntaxKind :: SELF_KW } ; [static] => { $ crate :: SyntaxKind :: STATIC_KW } ; [struct] => { $ crate :: SyntaxKind :: STRUCT_KW } ; [super] => { $ crate :: SyntaxKind :: SUPER_KW } ; [trait] => { $ crate :: SyntaxKind :: TRAIT_KW } ; [true] => { $ crate :: SyntaxKind :: TRUE_KW } ; [try] => { $ crate :: SyntaxKind :: TRY_KW } ; [type] => { $ crate :: SyntaxKind :: TYPE_KW } ; [unsafe] => { $ crate :: SyntaxKind :: UNSAFE_KW } ; [use] => { $ crate :: SyntaxKind :: USE_KW } ; [where] => { $ crate :: SyntaxKind :: WHERE_KW } ; [while] => { $ crate :: SyntaxKind :: WHILE_KW } ; [auto] => { $ crate :: SyntaxKind :: AUTO_KW } ; [default] => { $ crate :: SyntaxKind :: DEFAULT_KW } ; [existential] => { $ crate :: SyntaxKind :: EXISTENTIAL_KW } ; [union] => { $ crate :: SyntaxKind :: UNION_KW } ; [raw] => { $ crate :: SyntaxKind :: RAW_KW } ; [macro_rules] => { $ crate :: SyntaxKind :: MACRO_RULES_KW } ; [lifetime] => { $ crate :: SyntaxKind :: LIFETIME } ; [ident] => { $ crate :: SyntaxKind :: IDENT } ; [shebang] => { $ crate :: SyntaxKind :: SHEBANG } ; }

crates/syntax/src/ast/generated/nodes.rs

@@ -128,7 +128,6 @@ pub struct MacroCall {
     pub(crate) syntax: SyntaxNode,
 }
 impl ast::AttrsOwner for MacroCall {}
-impl ast::NameOwner for MacroCall {}
 impl MacroCall {
     pub fn path(&self) -> Option<Path> { support::child(&self.syntax) }
     pub fn excl_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![!]) }
@@ -273,6 +272,20 @@ impl Impl {
     pub fn assoc_item_list(&self) -> Option<AssocItemList> { support::child(&self.syntax) }
 }
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MacroRules {
+    pub(crate) syntax: SyntaxNode,
+}
+impl ast::AttrsOwner for MacroRules {}
+impl ast::NameOwner for MacroRules {}
+impl ast::VisibilityOwner for MacroRules {}
+impl MacroRules {
+    pub fn macro_rules_token(&self) -> Option<SyntaxToken> {
+        support::token(&self.syntax, T![macro_rules])
+    }
+    pub fn excl_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![!]) }
+    pub fn token_tree(&self) -> Option<TokenTree> { support::child(&self.syntax) }
+}
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct Module {
     pub(crate) syntax: SyntaxNode,
 }
@@ -1318,6 +1331,7 @@ pub enum Item {
     Fn(Fn),
     Impl(Impl),
     MacroCall(MacroCall),
+    MacroRules(MacroRules),
     Module(Module),
     Static(Static),
     Struct(Struct),
@@ -1374,7 +1388,6 @@ pub enum AssocItem {
     TypeAlias(TypeAlias),
 }
 impl ast::AttrsOwner for AssocItem {}
-impl ast::NameOwner for AssocItem {}
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum ExternItem {
     Fn(Fn),
@@ -1383,7 +1396,6 @@ pub enum ExternItem {
     TypeAlias(TypeAlias),
 }
 impl ast::AttrsOwner for ExternItem {}
-impl ast::NameOwner for ExternItem {}
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub enum GenericParam {
     ConstParam(ConstParam),
@@ -1666,6 +1678,17 @@ impl AstNode for Impl {
     }
     fn syntax(&self) -> &SyntaxNode { &self.syntax }
 }
+impl AstNode for MacroRules {
+    fn can_cast(kind: SyntaxKind) -> bool { kind == MACRO_RULES }
+    fn cast(syntax: SyntaxNode) -> Option<Self> {
+        if Self::can_cast(syntax.kind()) {
+            Some(Self { syntax })
+        } else {
+            None
+        }
+    }
+    fn syntax(&self) -> &SyntaxNode { &self.syntax }
+}
 impl AstNode for Module {
     fn can_cast(kind: SyntaxKind) -> bool { kind == MODULE }
     fn cast(syntax: SyntaxNode) -> Option<Self> {
@@ -3060,6 +3083,9 @@ impl From<Impl> for Item {
 impl From<MacroCall> for Item {
     fn from(node: MacroCall) -> Item { Item::MacroCall(node) }
 }
+impl From<MacroRules> for Item {
+    fn from(node: MacroRules) -> Item { Item::MacroRules(node) }
+}
 impl From<Module> for Item {
     fn from(node: Module) -> Item { Item::Module(node) }
 }
@@ -3084,8 +3110,8 @@ impl From<Use> for Item {
 impl AstNode for Item {
     fn can_cast(kind: SyntaxKind) -> bool {
         match kind {
-            CONST | ENUM | EXTERN_BLOCK | EXTERN_CRATE | FN | IMPL | MACRO_CALL | MODULE
+            CONST | ENUM | EXTERN_BLOCK | EXTERN_CRATE | FN | IMPL | MACRO_CALL | MACRO_RULES
-            | STATIC | STRUCT | TRAIT | TYPE_ALIAS | UNION | USE => true,
+            | MODULE | STATIC | STRUCT | TRAIT | TYPE_ALIAS | UNION | USE => true,
             _ => false,
         }
     }
@@ -3098,6 +3124,7 @@ impl AstNode for Item {
             FN => Item::Fn(Fn { syntax }),
             IMPL => Item::Impl(Impl { syntax }),
             MACRO_CALL => Item::MacroCall(MacroCall { syntax }),
+            MACRO_RULES => Item::MacroRules(MacroRules { syntax }),
             MODULE => Item::Module(Module { syntax }),
             STATIC => Item::Static(Static { syntax }),
             STRUCT => Item::Struct(Struct { syntax }),
@@ -3118,6 +3145,7 @@ impl AstNode for Item {
             Item::Fn(it) => &it.syntax,
             Item::Impl(it) => &it.syntax,
             Item::MacroCall(it) => &it.syntax,
+            Item::MacroRules(it) => &it.syntax,
             Item::Module(it) => &it.syntax,
             Item::Static(it) => &it.syntax,
             Item::Struct(it) => &it.syntax,
@@ -3582,6 +3610,11 @@ impl std::fmt::Display for Impl {
         std::fmt::Display::fmt(self.syntax(), f)
     }
 }
+impl std::fmt::Display for MacroRules {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(self.syntax(), f)
+    }
+}
 impl std::fmt::Display for Module {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         std::fmt::Display::fmt(self.syntax(), f)

crates/syntax/src/ast/node_ext.rs

@@ -382,21 +382,6 @@ impl ast::Visibility {
     }
 }
 
-impl ast::MacroCall {
-    pub fn is_macro_rules(&self) -> Option<ast::Name> {
-        let name_ref = self.path()?.segment()?.name_ref()?;
-        if name_ref.text() == "macro_rules" {
-            self.name()
-        } else {
-            None
-        }
-    }
-
-    pub fn is_bang(&self) -> bool {
-        self.is_macro_rules().is_none()
-    }
-}
-
 impl ast::LifetimeParam {
     pub fn lifetime_bounds(&self) -> impl Iterator<Item = SyntaxToken> {
         self.syntax()
@@ -476,5 +461,5 @@ impl ast::DocCommentsOwner for ast::Static {}
 impl ast::DocCommentsOwner for ast::Const {}
 impl ast::DocCommentsOwner for ast::TypeAlias {}
 impl ast::DocCommentsOwner for ast::Impl {}
-impl ast::DocCommentsOwner for ast::MacroCall {}
+impl ast::DocCommentsOwner for ast::MacroRules {}
 impl ast::DocCommentsOwner for ast::Use {}

crates/syntax/src/display.rs

@@ -76,7 +76,7 @@ pub fn type_label(node: &ast::TypeAlias) -> String {
     label.trim().to_owned()
 }
 
-pub fn macro_label(node: &ast::MacroCall) -> String {
+pub fn macro_label(node: &ast::MacroRules) -> String {
     let name = node.name().map(|name| name.syntax().text().to_string()).unwrap_or_default();
     let vis = if node.has_atom_attr("macro_export") { "#[macro_export]\n" } else { "" };
     format!("{}macro_rules! {}", vis, name)

crates/syntax/src/parsing/text_tree_sink.rs

@@ -147,8 +147,8 @@ fn n_attached_trivias<'a>(
     trivias: impl Iterator<Item = (SyntaxKind, &'a str)>,
 ) -> usize {
     match kind {
-        MACRO_CALL | CONST | TYPE_ALIAS | STRUCT | ENUM | VARIANT | FN | TRAIT | MODULE
+        MACRO_CALL | MACRO_RULES | CONST | TYPE_ALIAS | STRUCT | ENUM | VARIANT | FN | TRAIT
-        | RECORD_FIELD | STATIC | USE => {
+        | MODULE | RECORD_FIELD | STATIC | USE => {
             let mut res = 0;
             let mut trivias = trivias.enumerate().peekable();
 

crates/syntax/src/validation.rs

@@ -3,7 +3,9 @@
 mod block;
 
 use crate::{
-    algo, ast, match_ast, AstNode, SyntaxError,
+    algo,
+    ast::{self, VisibilityOwner},
+    match_ast, AstNode, SyntaxError,
     SyntaxKind::{CONST, FN, INT_NUMBER, TYPE_ALIAS},
     SyntaxNode, SyntaxToken, TextSize, T,
 };
@@ -99,6 +101,7 @@ pub(crate) fn validate(root: &SyntaxNode) -> Vec<SyntaxError> {
                 ast::RefType(it) => validate_trait_object_ref_ty(it, &mut errors),
                 ast::PtrType(it) => validate_trait_object_ptr_ty(it, &mut errors),
                 ast::FnPtrType(it) => validate_trait_object_fn_ptr_ret_ty(it, &mut errors),
+                ast::MacroRules(it) => validate_macro_rules(it, &mut errors),
                 _ => (),
             }
         }
@@ -350,3 +353,12 @@ fn validate_trait_object_ty(ty: ast::DynTraitType) -> Option<SyntaxError> {
     }
     None
 }
+
+fn validate_macro_rules(mac: ast::MacroRules, errors: &mut Vec<SyntaxError>) {
+    if let Some(vis) = mac.visibility() {
+        errors.push(SyntaxError::new(
+            "visibilities are not allowed on `macro_rules!` items",
+            vis.syntax().text_range(),
+        ));
+    }
+}

crates/syntax/test_data/parser/err/0002_duplicate_shebang.rast

@@ -17,14 +17,17 @@ SOURCE_FILE@0..42
           IDENT@28..31 "bin"
   ERROR@31..32
     SLASH@31..32 "/"
-  MACRO_CALL@32..41
+  MACRO_CALL@32..35
     PATH@32..35
       PATH_SEGMENT@32..35
         NAME_REF@32..35
           IDENT@32..35 "env"
-    WHITESPACE@35..36 " "
+  WHITESPACE@35..36 " "
-    NAME@36..41
+  MACRO_CALL@36..41
-      IDENT@36..41 "rusti"
+    PATH@36..41
+      PATH_SEGMENT@36..41
+        NAME_REF@36..41
+          IDENT@36..41 "rusti"
   WHITESPACE@41..42 "\n"
 error 23..23: expected `[`
 error 23..23: expected an item
@@ -35,5 +38,8 @@ error 31..31: expected `{`, `[`, `(`
 error 31..31: expected SEMICOLON
 error 31..31: expected an item
 error 35..35: expected BANG
+error 35..35: expected `{`, `[`, `(`
+error 35..35: expected SEMICOLON
+error 41..41: expected BANG
 error 41..41: expected `{`, `[`, `(`
 error 41..41: expected SEMICOLON

crates/syntax/test_data/parser/inline/ok/0062_mod_contents.rast

@@ -12,11 +12,8 @@ SOURCE_FILE@0..70
       L_CURLY@9..10 "{"
       R_CURLY@10..11 "}"
   WHITESPACE@11..12 "\n"
-  MACRO_CALL@12..31
+  MACRO_RULES@12..31
-    PATH@12..23
+    MACRO_RULES_KW@12..23 "macro_rules"
-      PATH_SEGMENT@12..23
-        NAME_REF@12..23
-          IDENT@12..23 "macro_rules"
     BANG@23..24 "!"
     WHITESPACE@24..25 " "
     NAME@25..28

crates/syntax/test_data/parser/inline/ok/0096_no_semi_after_block.rast

@@ -82,32 +82,28 @@ SOURCE_FILE@0..167
           L_CURLY@102..103 "{"
           R_CURLY@103..104 "}"
       WHITESPACE@104..109 "\n    "
-      EXPR_STMT@109..152
+      MACRO_RULES@109..152
-        MACRO_CALL@109..152
+        MACRO_RULES_KW@109..120 "macro_rules"
-          PATH@109..120
+        BANG@120..121 "!"
-            PATH_SEGMENT@109..120
+        WHITESPACE@121..122 " "
-              NAME_REF@109..120
+        NAME@122..126
-                IDENT@109..120 "macro_rules"
+          IDENT@122..126 "test"
-          BANG@120..121 "!"
+        WHITESPACE@126..127 " "
-          WHITESPACE@121..122 " "
+        TOKEN_TREE@127..152
-          NAME@122..126
+          L_CURLY@127..128 "{"
-            IDENT@122..126 "test"
+          WHITESPACE@128..138 "\n         "
-          WHITESPACE@126..127 " "
+          TOKEN_TREE@138..140
-          TOKEN_TREE@127..152
+            L_PAREN@138..139 "("
-            L_CURLY@127..128 "{"
+            R_PAREN@139..140 ")"
-            WHITESPACE@128..138 "\n         "
+          WHITESPACE@140..141 " "
-            TOKEN_TREE@138..140
+          EQ@141..142 "="
-              L_PAREN@138..139 "("
+          R_ANGLE@142..143 ">"
-              R_PAREN@139..140 ")"
+          WHITESPACE@143..144 " "
-            WHITESPACE@140..141 " "
+          TOKEN_TREE@144..146
-            EQ@141..142 "="
+            L_CURLY@144..145 "{"
-            R_ANGLE@142..143 ">"
+            R_CURLY@145..146 "}"
-            WHITESPACE@143..144 " "
+          WHITESPACE@146..151 "\n    "
-            TOKEN_TREE@144..146
+          R_CURLY@151..152 "}"
-              L_CURLY@144..145 "{"
-              R_CURLY@145..146 "}"
-            WHITESPACE@146..151 "\n    "
-            R_CURLY@151..152 "}"
       WHITESPACE@152..157 "\n    "
       MACRO_CALL@157..164
         PATH@157..161

crates/syntax/test_data/parser/inline/ok/0160_try_macro_rules.rast

@@ -1,9 +1,6 @@
 SOURCE_FILE@0..30
-  MACRO_CALL@0..29
+  MACRO_RULES@0..29
-    PATH@0..11
+    MACRO_RULES_KW@0..11 "macro_rules"
-      PATH_SEGMENT@0..11
-        NAME_REF@0..11
-          IDENT@0..11 "macro_rules"
     BANG@11..12 "!"
     WHITESPACE@12..13 " "
     NAME@13..16

crates/syntax/test_data/parser/ok/0053_outer_attribute_on_macro_rules.rast

@@ -1,5 +1,5 @@
 SOURCE_FILE@0..65
-  MACRO_CALL@0..64
+  MACRO_RULES@0..64
     COMMENT@0..13 "/// Some docs"
     WHITESPACE@13..14 "\n"
     ATTR@14..29
@@ -11,10 +11,7 @@ SOURCE_FILE@0..65
             IDENT@16..28 "macro_export"
       R_BRACK@28..29 "]"
     WHITESPACE@29..30 "\n"
-    PATH@30..41
+    MACRO_RULES_KW@30..41 "macro_rules"
-      PATH_SEGMENT@30..41
-        NAME_REF@30..41
-          IDENT@30..41 "macro_rules"
     BANG@41..42 "!"
     WHITESPACE@42..43 " "
     NAME@43..46

xtask/src/ast_src.rs

@@ -70,7 +70,7 @@ pub(crate) const KINDS_SRC: KindsSrc = KindsSrc {
         "match", "mod", "move", "mut", "pub", "ref", "return", "self", "static", "struct", "super",
         "trait", "true", "try", "type", "unsafe", "use", "where", "while",
     ],
-    contextual_keywords: &["auto", "default", "existential", "union", "raw"],
+    contextual_keywords: &["auto", "default", "existential", "union", "raw", "macro_rules"],
     literals: &["INT_NUMBER", "FLOAT_NUMBER", "CHAR", "BYTE", "STRING", "BYTE_STRING"],
     tokens: &[
         "ERROR",
@@ -98,6 +98,8 @@ pub(crate) const KINDS_SRC: KindsSrc = KindsSrc {
         "IMPL",
         "TYPE_ALIAS",
         "MACRO_CALL",
+        "MACRO_RULES",
+        "MACRO_ARM",
         "TOKEN_TREE",
         "MACRO_DEF",
         "PAREN_TYPE",