Apply stylistic changes suggested

diff --git a/crates/ra_parser/src/grammar/expressions.rs b/crates/ra_parser/src/grammar/expressions.rs
index 9839846f17a9a83fb762fc91170002fa5d8abb2b..6d3e379a3410de9e308e1267f61f41c7149f54fd 100644 (file)
--- a/crates/ra_parser/src/grammar/expressions.rs
+++ b/crates/ra_parser/src/grammar/expressions.rs
@@ -54,7 +54,7 @@ pub(crate) fn expr_block_contents(p: &mut Parser) {
 
         // test block_items
         // fn a() { fn b() {} }
-        let mut m = p.start();
+        let m = p.start();
         let has_attrs = p.at(POUND);
         attributes::outer_attributes(p);
         if p.at(LET_KW) {
@@ -62,9 +62,9 @@ pub(crate) fn expr_block_contents(p: &mut Parser) {
             continue;
         }
 
-        m = match items::maybe_item(p, m, items::ItemFlavor::Mod) {
-            Some(m) => m,
-            None => continue,
+        let m = match items::maybe_item(p, m, items::ItemFlavor::Mod) {
+            Ok(()) => continue,
+            Err(m) => m,
         };
 
         // test pub_expr

diff --git a/crates/ra_parser/src/grammar/items.rs b/crates/ra_parser/src/grammar/items.rs
index 5411589ddb402c82a089e3f0cac6de156a28d9db..94b93a02b7ff8c1df96eba3ef4e97c98e7ffff19 100644 (file)
--- a/crates/ra_parser/src/grammar/items.rs
+++ b/crates/ra_parser/src/grammar/items.rs
@@ -35,11 +35,11 @@ pub(super) enum ItemFlavor {
 ];
 
 pub(super) fn item_or_macro(p: &mut Parser, stop_on_r_curly: bool, flavor: ItemFlavor) {
-    let mut m = p.start();
+    let m = p.start();
     attributes::outer_attributes(p);
-    m = match maybe_item(p, m, flavor) {
-        Some(m) => m,
-        None => return,
+    let m = match maybe_item(p, m, flavor) {
+        Ok(()) => return,
+        Err(m) => m,
     };
     if paths::is_path_start(p) {
         match macro_call(p) {
@@ -66,11 +66,11 @@ pub(super) fn item_or_macro(p: &mut Parser, stop_on_r_curly: bool, flavor: ItemF
     }
 }
 
-pub(super) fn maybe_item(p: &mut Parser, m: Marker, flavor: ItemFlavor) -> Option<Marker> {
+pub(super) fn maybe_item(p: &mut Parser, m: Marker, flavor: ItemFlavor) -> Result<(), Marker> {
     opt_visibility(p);
     if let Some(kind) = items_without_modifiers(p) {
         m.complete(p, kind);
-        return None;
+        return Ok(());
     }
 
     let mut has_mods = false;
@@ -124,7 +124,6 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker, flavor: ItemFlavor) -> Optio
         FN_KW => {
             fn_def(p, flavor);
             m.complete(p, FN_DEF);
-            None
         }
 
         // test unsafe_trait
@@ -138,7 +137,6 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker, flavor: ItemFlavor) -> Optio
         TRAIT_KW => {
             traits::trait_def(p);
             m.complete(p, TRAIT_DEF);
-            None
         }
 
         // test unsafe_impl
@@ -152,18 +150,17 @@ pub(super) fn maybe_item(p: &mut Parser, m: Marker, flavor: ItemFlavor) -> Optio
         IMPL_KW => {
             traits::impl_block(p);
             m.complete(p, IMPL_BLOCK);
-            None
         }
         _ => {
-            if has_mods {
+            if !has_mods {
+                return Err(m);
+            } else {
                 p.error("expected fn, trait or impl");
                 m.complete(p, ERROR);
-                None
-            } else {
-                Some(m)
             }
         }
     }
+    Ok(())
 }
 
 fn items_without_modifiers(p: &mut Parser) -> Option<SyntaxKind> {