support ref-patterns

3 files changed, 12 insertions, 2 deletions

diff --git a/crates/ra_syntax/src/ast.rs b/crates/ra_syntax/src/ast.rs
index 123a7a6b9..8bf439b60 100644
--- a/crates/ra_syntax/src/ast.rs
+++ b/crates/ra_syntax/src/ast.rs
@@ -348,6 +348,12 @@ impl UseTreeList {
     }
 }
 
+impl RefPat {
+    pub fn is_mut(&self) -> bool {
+        self.syntax().children().any(|n| n.kind() == MUT_KW)
+    }
+}
+
 fn child_opt<P: AstNode, C: AstNode>(parent: &P) -> Option<&C> {
     children(parent).next()
 }
diff --git a/crates/ra_syntax/src/ast/generated.rs b/crates/ra_syntax/src/ast/generated.rs
index 1f6055115..f745cb1cb 100644
--- a/crates/ra_syntax/src/ast/generated.rs
+++ b/crates/ra_syntax/src/ast/generated.rs
@@ -2456,7 +2456,11 @@ impl AstNode for RefPat {
 }
 
 
-impl RefPat {}
+impl RefPat {
+    pub fn pat(&self) -> Option<&Pat> {
+        super::child_opt(self)
+    }
+}
 
 // ReferenceType
 #[derive(Debug, PartialEq, Eq, Hash)]
diff --git a/crates/ra_syntax/src/grammar.ron b/crates/ra_syntax/src/grammar.ron
index bddd96a5c..bac62fa04 100644
--- a/crates/ra_syntax/src/grammar.ron
+++ b/crates/ra_syntax/src/grammar.ron
@@ -462,7 +462,7 @@ Grammar(
             ],
         ),
 
-        "RefPat": (),
+        "RefPat": ( options: [ "Pat" ]),
         "BindPat": ( traits: ["NameOwner"] ),
         "PlaceholderPat": (),
         "PathPat": (),