Handle closure return types

Fixes #2547.

2 files changed, 4 insertions, 1 deletions

diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 9dd6bd3ea..8d65e2e08 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -1426,6 +1426,9 @@ impl LambdaExpr {
     pub fn param_list(&self) -> Option<ParamList> {
         AstChildren::new(&self.syntax).next()
     }
+    pub fn ret_type(&self) -> Option<RetType> {
+        AstChildren::new(&self.syntax).next()
+    }
     pub fn body(&self) -> Option<Expr> {
         AstChildren::new(&self.syntax).next()
     }
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index 9ffa9095b..a228fa9d6 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -426,7 +426,7 @@ Grammar(
         "PathExpr": (options: ["Path"]),
         "LambdaExpr": (
             options: [
-                "ParamList",
+                "ParamList", "RetType",
                 ["body", "Expr"],
             ]
         ),