1 files changed, 7 insertions, 0 deletions

diff --git a/crates/ra_syntax/src/ast/traits.rs b/crates/ra_syntax/src/ast/traits.rs
index f99984fe0..8bf6aa2f0 100644
--- a/crates/ra_syntax/src/ast/traits.rs
+++ b/crates/ra_syntax/src/ast/traits.rs
@@ -8,6 +8,7 @@ use crate::{
     ast::{self, child_opt, children, AstChildren, AstNode, AstToken},
     match_ast,
     syntax_node::{SyntaxElementChildren, SyntaxNodeChildren},
+    SyntaxKind,
 };
 
 pub trait TypeAscriptionOwner: AstNode {
@@ -105,6 +106,12 @@ pub trait AttrsOwner: AstNode {
     }
 }
 
+pub trait AsyncOwner: AstNode {
+    fn is_async(&self) -> bool {
+        self.syntax().children_with_tokens().any(|t| t.kind() == SyntaxKind::ASYNC_KW)
+    }
+}
+
 pub trait DocCommentsOwner: AstNode {
     fn doc_comments(&self) -> CommentIter {
         CommentIter { iter: self.syntax().children_with_tokens() }