16 files changed, 253 insertions, 62 deletions

diff --git a/crates/ra_assists/src/doc_tests/generated.rs b/crates/ra_assists/src/doc_tests/generated.rs
index 62dcb3808..543224232 100644
--- a/crates/ra_assists/src/doc_tests/generated.rs
+++ b/crates/ra_assists/src/doc_tests/generated.rs
@@ -623,6 +623,30 @@ fn process(map: HashMap<String, String>) {}
 }
 
 #[test]
+fn doctest_replace_unwrap_with_match() {
+    check(
+        "replace_unwrap_with_match",
+        r#####"
+enum Result<T, E> { Ok(T), Err(E) }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = x.<|>unwrap();
+}
+"#####,
+        r#####"
+enum Result<T, E> { Ok(T), Err(E) }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = match x {
+        Ok(a) => a,
+        _ => unreachable!(),
+    };
+}
+"#####,
+    )
+}
+
+#[test]
 fn doctest_split_import() {
     check(
         "split_import",
diff --git a/crates/ra_assists/src/handlers/add_explicit_type.rs b/crates/ra_assists/src/handlers/add_explicit_type.rs
index a63ef48b1..d86d804b2 100644
--- a/crates/ra_assists/src/handlers/add_explicit_type.rs
+++ b/crates/ra_assists/src/handlers/add_explicit_type.rs
@@ -130,8 +130,8 @@ mod tests {
     fn add_explicit_type_works_for_macro_call() {
         check_assist(
             add_explicit_type,
-            "macro_rules! v { () => {0u64} } fn f() { let a<|> = v!(); }",
-            "macro_rules! v { () => {0u64} } fn f() { let a<|>: u64 = v!(); }",
+            r"macro_rules! v { () => {0u64} } fn f() { let a<|> = v!(); }",
+            r"macro_rules! v { () => {0u64} } fn f() { let a<|>: u64 = v!(); }",
         );
     }
 
diff --git a/crates/ra_assists/src/handlers/replace_unwrap_with_match.rs b/crates/ra_assists/src/handlers/replace_unwrap_with_match.rs
new file mode 100644
index 000000000..62cb7a763
--- /dev/null
+++ b/crates/ra_assists/src/handlers/replace_unwrap_with_match.rs
@@ -0,0 +1,177 @@
+use std::iter;
+
+use ra_syntax::{
+    ast::{self, make},
+    AstNode,
+};
+
+use crate::{Assist, AssistCtx, AssistId};
+use ast::edit::IndentLevel;
+
+// Assist: replace_unwrap_with_match
+//
+// Replaces `unwrap` a `match` expression. Works for Result and Option.
+//
+// ```
+// enum Result<T, E> { Ok(T), Err(E) }
+// fn main() {
+//     let x: Result<i32, i32> = Result::Ok(92);
+//     let y = x.<|>unwrap();
+// }
+// ```
+// ->
+// ```
+// enum Result<T, E> { Ok(T), Err(E) }
+// fn main() {
+//     let x: Result<i32, i32> = Result::Ok(92);
+//     let y = match x {
+//         Ok(a) => a,
+//         _ => unreachable!(),
+//     };
+// }
+// ```
+pub(crate) fn replace_unwrap_with_match(ctx: AssistCtx) -> Option<Assist> {
+    let method_call: ast::MethodCallExpr = ctx.find_node_at_offset()?;
+    let name = method_call.name_ref()?;
+    if name.text() != "unwrap" {
+        return None;
+    }
+    let caller = method_call.expr()?;
+    let ty = ctx.sema.type_of_expr(&caller)?;
+
+    let type_name = ty.as_adt()?.name(ctx.sema.db).to_string();
+
+    for (unwrap_type, variant_name) in [("Result", "Ok"), ("Option", "Some")].iter() {
+        if &type_name == unwrap_type {
+            return ctx.add_assist(
+                AssistId("replace_unwrap_with_match"),
+                "Replace unwrap with match",
+                |edit| {
+                    let ok_path =
+                        make::path_unqualified(make::path_segment(make::name_ref(variant_name)));
+                    let it = make::bind_pat(make::name("a")).into();
+                    let ok_tuple = make::tuple_struct_pat(ok_path, iter::once(it)).into();
+
+                    let bind_path = make::path_unqualified(make::path_segment(make::name_ref("a")));
+                    let ok_arm = make::match_arm(iter::once(ok_tuple), make::expr_path(bind_path));
+
+                    let unreachable_call = make::unreachable_macro_call().into();
+                    let err_arm = make::match_arm(
+                        iter::once(make::placeholder_pat().into()),
+                        unreachable_call,
+                    );
+
+                    let match_arm_list = make::match_arm_list(vec![ok_arm, err_arm]);
+                    let match_expr = make::expr_match(caller.clone(), match_arm_list);
+                    let match_expr =
+                        IndentLevel::from_node(method_call.syntax()).increase_indent(match_expr);
+
+                    edit.target(method_call.syntax().text_range());
+                    edit.set_cursor(caller.syntax().text_range().start());
+                    edit.replace_ast::<ast::Expr>(method_call.into(), match_expr);
+                },
+            );
+        }
+    }
+    None
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::helpers::{check_assist, check_assist_target};
+
+    #[test]
+    fn test_replace_result_unwrap_with_match() {
+        check_assist(
+            replace_unwrap_with_match,
+            r"
+enum Result<T, E> { Ok(T), Err(E) }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = i(x).<|>unwrap();
+}
+            ",
+            r"
+enum Result<T, E> { Ok(T), Err(E) }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = <|>match i(x) {
+        Ok(a) => a,
+        _ => unreachable!(),
+    };
+}
+            ",
+        )
+    }
+
+    #[test]
+    fn test_replace_option_unwrap_with_match() {
+        check_assist(
+            replace_unwrap_with_match,
+            r"
+enum Option<T> { Some(T), None }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x = Option::Some(92);
+    let y = i(x).<|>unwrap();
+}
+            ",
+            r"
+enum Option<T> { Some(T), None }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x = Option::Some(92);
+    let y = <|>match i(x) {
+        Some(a) => a,
+        _ => unreachable!(),
+    };
+}
+            ",
+        );
+    }
+
+    #[test]
+    fn test_replace_result_unwrap_with_match_chaining() {
+        check_assist(
+            replace_unwrap_with_match,
+            r"
+enum Result<T, E> { Ok(T), Err(E) }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = i(x).<|>unwrap().count_zeroes();
+}
+            ",
+            r"
+enum Result<T, E> { Ok(T), Err(E) }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x: Result<i32, i32> = Result::Ok(92);
+    let y = <|>match i(x) {
+        Ok(a) => a,
+        _ => unreachable!(),
+    }.count_zeroes();
+}
+            ",
+        )
+    }
+
+    #[test]
+    fn replace_unwrap_with_match_target() {
+        check_assist_target(
+            replace_unwrap_with_match,
+            r"
+enum Option<T> { Some(T), None }
+fn i<T>(a: T) -> T { a }
+fn main() {
+    let x = Option::Some(92);
+    let y = i(x).<|>unwrap();
+}
+            ",
+            r"i(x).unwrap()",
+        );
+    }
+}
diff --git a/crates/ra_assists/src/lib.rs b/crates/ra_assists/src/lib.rs
index bcc9b3f10..becd5e99d 100644
--- a/crates/ra_assists/src/lib.rs
+++ b/crates/ra_assists/src/lib.rs
@@ -119,6 +119,7 @@ mod handlers {
     mod remove_mut;
     mod replace_if_let_with_match;
     mod replace_qualified_name_with_use;
+    mod replace_unwrap_with_match;
     mod split_import;
 
     pub(crate) fn all() -> &'static [AssistHandler] {
@@ -154,6 +155,7 @@ mod handlers {
             remove_mut::remove_mut,
             replace_if_let_with_match::replace_if_let_with_match,
             replace_qualified_name_with_use::replace_qualified_name_with_use,
+            replace_unwrap_with_match::replace_unwrap_with_match,
             split_import::split_import,
         ]
     }
diff --git a/crates/ra_db/src/fixture.rs b/crates/ra_db/src/fixture.rs
index 9d992886e..7777ce81e 100644
--- a/crates/ra_db/src/fixture.rs
+++ b/crates/ra_db/src/fixture.rs
@@ -28,9 +28,9 @@ pub trait WithFixture: Default + SourceDatabaseExt + 'static {
         db
     }
 
-    fn with_position(fixture: &str) -> (Self, FilePosition) {
+    fn with_position(ra_fixture: &str) -> (Self, FilePosition) {
         let mut db = Self::default();
-        let pos = with_files(&mut db, fixture);
+        let pos = with_files(&mut db, ra_fixture);
         (db, pos.unwrap())
     }
 
diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index fcba95091..ec931b34f 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -10,15 +10,16 @@ pub use hir_def::db::{
     TraitDataQuery, TypeAliasDataQuery, UnionDataQuery,
 };
 pub use hir_expand::db::{
-    AstDatabase, AstDatabaseStorage, AstIdMapQuery, InternMacroQuery, MacroArgQuery, MacroDefQuery,
-    MacroExpandQuery, ParseMacroQuery,
+    AstDatabase, AstDatabaseStorage, AstIdMapQuery, InternEagerExpansionQuery, InternMacroQuery,
+    MacroArgQuery, MacroDefQuery, MacroExpandQuery, ParseMacroQuery,
 };
 pub use hir_ty::db::{
     AssociatedTyDataQuery, AssociatedTyValueQuery, CallableItemSignatureQuery, FieldTypesQuery,
     GenericDefaultsQuery, GenericPredicatesForParamQuery, GenericPredicatesQuery, HirDatabase,
     HirDatabaseStorage, ImplDatumQuery, ImplSelfTyQuery, ImplTraitQuery, ImplsForTraitQuery,
     ImplsInCrateQuery, InferQueryQuery, InternAssocTyValueQuery, InternChalkImplQuery,
-    InternTypeCtorQuery, StructDatumQuery, TraitDatumQuery, TraitSolveQuery, TyQuery, ValueTyQuery,
+    InternTypeCtorQuery, InternTypeParamIdQuery, StructDatumQuery, TraitDatumQuery,
+    TraitSolveQuery, TyQuery, ValueTyQuery,
 };
 
 #[test]
diff --git a/crates/ra_hir_def/src/body/lower.rs b/crates/ra_hir_def/src/body/lower.rs
index 3cf0c66ea..e8443dde8 100644
--- a/crates/ra_hir_def/src/body/lower.rs
+++ b/crates/ra_hir_def/src/body/lower.rs
@@ -563,7 +563,8 @@ impl ExprCollector<'_> {
                 ast::ModuleItem::ImplDef(_)
                 | ast::ModuleItem::UseItem(_)
                 | ast::ModuleItem::ExternCrateItem(_)
-                | ast::ModuleItem::Module(_) => continue,
+                | ast::ModuleItem::Module(_)
+                | ast::ModuleItem::MacroCall(_) => continue,
             };
             self.body.item_scope.define_def(def);
             if let Some(name) = name {
diff --git a/crates/ra_hir_def/src/db.rs b/crates/ra_hir_def/src/db.rs
index 7f8c1ea21..5dc7395f5 100644
--- a/crates/ra_hir_def/src/db.rs
+++ b/crates/ra_hir_def/src/db.rs
@@ -48,6 +48,7 @@ pub trait DefDatabase: InternDatabase + AstDatabase + Upcast<dyn AstDatabase> {
     fn raw_items(&self, file_id: HirFileId) -> Arc<RawItems>;
 
     #[salsa::invoke(crate_def_map_wait)]
+    #[salsa::transparent]
     fn crate_def_map(&self, krate: CrateId) -> Arc<CrateDefMap>;
 
     #[salsa::invoke(CrateDefMap::crate_def_map_query)]
@@ -109,12 +110,6 @@ pub trait DefDatabase: InternDatabase + AstDatabase + Upcast<dyn AstDatabase> {
     fn documentation(&self, def: AttrDefId) -> Option<Documentation>;
 }
 
-// impl<T: DefDatabase> Upcast<dyn AstDatabase> for T {
-//     fn upcast(&self) -> &dyn AstDatabase {
-//         &*self
-//     }
-// }
-
 fn crate_def_map_wait(db: &impl DefDatabase, krate: CrateId) -> Arc<CrateDefMap> {
     let _p = profile("crate_def_map:wait");
     db.crate_def_map_query(krate)
diff --git a/crates/ra_hir_def/src/nameres/raw.rs b/crates/ra_hir_def/src/nameres/raw.rs
index 1631e87b8..8f190e7f9 100644
--- a/crates/ra_hir_def/src/nameres/raw.rs
+++ b/crates/ra_hir_def/src/nameres/raw.rs
@@ -209,11 +209,8 @@ impl RawItemsCollector {
         current_module: Option<Idx<ModuleData>>,
         body: impl ast::ModuleItemOwner,
     ) {
-        for item_or_macro in body.items_with_macros() {
-            match item_or_macro {
-                ast::ItemOrMacro::Macro(m) => self.add_macro(current_module, m),
-                ast::ItemOrMacro::Item(item) => self.add_item(current_module, item),
-            }
+        for item in body.items() {
+            self.add_item(current_module, item)
         }
     }
 
@@ -265,6 +262,10 @@ impl RawItemsCollector {
             ast::ModuleItem::StaticDef(it) => {
                 (DefKind::Static(self.source_ast_id_map.ast_id(&it)), it.name())
             }
+            ast::ModuleItem::MacroCall(it) => {
+                self.add_macro(current_module, it);
+                return;
+            }
         };
         if let Some(name) = name {
             let name = name.as_name();
diff --git a/crates/ra_hir_def/src/nameres/tests/incremental.rs b/crates/ra_hir_def/src/nameres/tests/incremental.rs
index 83f429c29..496fc6b08 100644
--- a/crates/ra_hir_def/src/nameres/tests/incremental.rs
+++ b/crates/ra_hir_def/src/nameres/tests/incremental.rs
@@ -4,8 +4,8 @@ use ra_db::SourceDatabaseExt;
 
 use super::*;
 
-fn check_def_map_is_not_recomputed(initial: &str, file_change: &str) {
-    let (mut db, pos) = TestDB::with_position(initial);
+fn check_def_map_is_not_recomputed(ra_fixture_initial: &str, ra_fixture_change: &str) {
+    let (mut db, pos) = TestDB::with_position(ra_fixture_initial);
     let krate = db.test_crate();
     {
         let events = db.log_executed(|| {
@@ -13,7 +13,7 @@ fn check_def_map_is_not_recomputed(initial: &str, file_change: &str) {
         });
         assert!(format!("{:?}", events).contains("crate_def_map"), "{:#?}", events)
     }
-    db.set_file_text(pos.file_id, Arc::new(file_change.to_string()));
+    db.set_file_text(pos.file_id, Arc::new(ra_fixture_change.to_string()));
 
     {
         let events = db.log_executed(|| {
@@ -26,7 +26,7 @@ fn check_def_map_is_not_recomputed(initial: &str, file_change: &str) {
 #[test]
 fn typing_inside_a_function_should_not_invalidate_def_map() {
     check_def_map_is_not_recomputed(
-        "
+        r"
         //- /lib.rs
         mod foo;<|>
 
@@ -41,7 +41,7 @@ fn typing_inside_a_function_should_not_invalidate_def_map() {
         //- /foo/bar.rs
         pub struct Baz;
         ",
-        "
+        r"
         mod foo;
 
         use crate::foo::bar::Baz;
@@ -54,7 +54,7 @@ fn typing_inside_a_function_should_not_invalidate_def_map() {
 #[test]
 fn adding_inner_items_should_not_invalidate_def_map() {
     check_def_map_is_not_recomputed(
-        "
+        r"
         //- /lib.rs
         struct S { a: i32}
         enum E { A }
@@ -72,7 +72,7 @@ fn adding_inner_items_should_not_invalidate_def_map() {
         //- /foo/bar.rs
         pub struct Baz;
         ",
-        "
+        r"
         struct S { a: i32, b: () }
         enum E { A, B }
         trait T {
@@ -92,7 +92,7 @@ fn adding_inner_items_should_not_invalidate_def_map() {
 #[test]
 fn typing_inside_a_macro_should_not_invalidate_def_map() {
     let (mut db, pos) = TestDB::with_position(
-        "
+        r"
         //- /lib.rs
         macro_rules! m {
             ($ident:ident) => {
diff --git a/crates/ra_hir_expand/src/ast_id_map.rs b/crates/ra_hir_expand/src/ast_id_map.rs
index a6644d55f..5643ecdce 100644
--- a/crates/ra_hir_expand/src/ast_id_map.rs
+++ b/crates/ra_hir_expand/src/ast_id_map.rs
@@ -68,8 +68,6 @@ impl AstIdMap {
         bfs(node, |it| {
             if let Some(module_item) = ast::ModuleItem::cast(it.clone()) {
                 res.alloc(module_item.syntax());
-            } else if let Some(macro_call) = ast::MacroCall::cast(it) {
-                res.alloc(macro_call.syntax());
             }
         });
         res
diff --git a/crates/ra_hir_ty/src/db.rs b/crates/ra_hir_ty/src/db.rs
index 11fc2ac3d..1462b053f 100644
--- a/crates/ra_hir_ty/src/db.rs
+++ b/crates/ra_hir_ty/src/db.rs
@@ -22,6 +22,7 @@ use hir_expand::name::Name;
 #[salsa::requires(salsa::Database)]
 pub trait HirDatabase: DefDatabase + Upcast<dyn DefDatabase> {
     #[salsa::invoke(infer_wait)]
+    #[salsa::transparent]
     fn infer(&self, def: DefWithBodyId) -> Arc<InferenceResult>;
 
     #[salsa::invoke(crate::infer::infer_query)]
diff --git a/crates/ra_ide_db/src/change.rs b/crates/ra_ide_db/src/change.rs
index 628cf6416..8446ef88e 100644
--- a/crates/ra_ide_db/src/change.rs
+++ b/crates/ra_ide_db/src/change.rs
@@ -311,6 +311,7 @@ impl RootDatabase {
             hir::db::MacroDefQuery
             hir::db::ParseMacroQuery
             hir::db::MacroExpandQuery
+            hir::db::InternEagerExpansionQuery
 
             // DefDatabase
             hir::db::RawItemsQuery
@@ -359,14 +360,21 @@ impl RootDatabase {
             hir::db::ImplsInCrateQuery
             hir::db::ImplsForTraitQuery
             hir::db::InternTypeCtorQuery
+            hir::db::InternTypeParamIdQuery
             hir::db::InternChalkImplQuery
             hir::db::InternAssocTyValueQuery
             hir::db::AssociatedTyDataQuery
-            hir::db::AssociatedTyValueQuery
-            hir::db::TraitSolveQuery
             hir::db::TraitDatumQuery
             hir::db::StructDatumQuery
             hir::db::ImplDatumQuery
+            hir::db::AssociatedTyValueQuery
+            hir::db::TraitSolveQuery
+
+            // SymbolsDatabase
+            crate::symbol_index::FileSymbolsQuery
+
+            // LineIndexDatabase
+            crate::LineIndexQuery
         ];
         acc.sort_by_key(|it| std::cmp::Reverse(it.1));
         acc
diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 002f453cd..7204ca5b1 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -4135,6 +4135,7 @@ pub enum ModuleItem {
     ConstDef(ConstDef),
     StaticDef(StaticDef),
     Module(Module),
+    MacroCall(MacroCall),
 }
 impl From<StructDef> for ModuleItem {
     fn from(node: StructDef) -> ModuleItem {
@@ -4196,6 +4197,11 @@ impl From<Module> for ModuleItem {
         ModuleItem::Module(node)
     }
 }
+impl From<MacroCall> for ModuleItem {
+    fn from(node: MacroCall) -> ModuleItem {
+        ModuleItem::MacroCall(node)
+    }
+}
 impl std::fmt::Display for ModuleItem {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
         std::fmt::Display::fmt(self.syntax(), f)
@@ -4205,7 +4211,7 @@ impl AstNode for ModuleItem {
     fn can_cast(kind: SyntaxKind) -> bool {
         match kind {
             STRUCT_DEF | UNION_DEF | ENUM_DEF | FN_DEF | TRAIT_DEF | TYPE_ALIAS_DEF | IMPL_DEF
-            | USE_ITEM | EXTERN_CRATE_ITEM | CONST_DEF | STATIC_DEF | MODULE => true,
+            | USE_ITEM | EXTERN_CRATE_ITEM | CONST_DEF | STATIC_DEF | MODULE | MACRO_CALL => true,
             _ => false,
         }
     }
@@ -4223,6 +4229,7 @@ impl AstNode for ModuleItem {
             CONST_DEF => ModuleItem::ConstDef(ConstDef { syntax }),
             STATIC_DEF => ModuleItem::StaticDef(StaticDef { syntax }),
             MODULE => ModuleItem::Module(Module { syntax }),
+            MACRO_CALL => ModuleItem::MacroCall(MacroCall { syntax }),
             _ => return None,
         };
         Some(res)
@@ -4241,6 +4248,7 @@ impl AstNode for ModuleItem {
             ModuleItem::ConstDef(it) => &it.syntax,
             ModuleItem::StaticDef(it) => &it.syntax,
             ModuleItem::Module(it) => &it.syntax,
+            ModuleItem::MacroCall(it) => &it.syntax,
         }
     }
 }
diff --git a/crates/ra_syntax/src/ast/make.rs b/crates/ra_syntax/src/ast/make.rs
index 1145b69e8..e29600439 100644
--- a/crates/ra_syntax/src/ast/make.rs
+++ b/crates/ra_syntax/src/ast/make.rs
@@ -250,6 +250,10 @@ pub fn token(kind: SyntaxKind) -> SyntaxToken {
         .unwrap_or_else(|| panic!("unhandled token: {:?}", kind))
 }
 
+pub fn unreachable_macro_call() -> ast::MacroCall {
+    ast_from_text(&format!("unreachable!()"))
+}
+
 fn ast_from_text<N: AstNode>(text: &str) -> N {
     let parse = SourceFile::parse(text);
     let node = parse.tree().syntax().descendants().find_map(N::cast).unwrap();
diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index f8cf1e3eb..576378306 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/crates/ra_syntax/src/ast/traits.rs
@@ -6,8 +6,7 @@ use itertools::Itertools;
 
 use crate::{
     ast::{self, child_opt, children, AstChildren, AstNode, AstToken},
-    match_ast,
-    syntax_node::{SyntaxElementChildren, SyntaxNodeChildren},
+    syntax_node::SyntaxElementChildren,
 };
 
 pub trait TypeAscriptionOwner: AstNode {
@@ -46,38 +45,10 @@ pub trait FnDefOwner: AstNode {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum ItemOrMacro {
-    Item(ast::ModuleItem),
-    Macro(ast::MacroCall),
-}
-
 pub trait ModuleItemOwner: AstNode {
     fn items(&self) -> AstChildren<ast::ModuleItem> {
         children(self)
     }
-    fn items_with_macros(&self) -> ItemOrMacroIter {
-        ItemOrMacroIter(self.syntax().children())
-    }
-}
-
-#[derive(Debug)]
-pub struct ItemOrMacroIter(SyntaxNodeChildren);
-
-impl Iterator for ItemOrMacroIter {
-    type Item = ItemOrMacro;
-    fn next(&mut self) -> Option<ItemOrMacro> {
-        loop {
-            let n = self.0.next()?;
-            match_ast! {
-                match n {
-                    ast::ModuleItem(it) => { return Some(ItemOrMacro::Item(it)) },
-                    ast::MacroCall(it) => { return Some(ItemOrMacro::Macro(it)) },
-                    _ => {},
-                }
-            }
-        }
-    }
 }
 
 pub trait TypeParamsOwner: AstNode {