1 files changed, 6 insertions, 0 deletions
diff --git a/src/wasm.h b/src/wasm.h
index 37aa495db..afc2cf88c 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -298,6 +298,12 @@ public:
     return _id == T()._id ? (T*)this : nullptr;
   }
 
+  template<class T>
+  T* cast() {
+    assert(_id == T()._id);
+    return (T*)this;
+  }
+
   inline std::ostream& print(std::ostream &o, unsigned indent); // avoid virtual here, for performance
 
   friend std::ostream& operator<<(std::ostream &o, Expression* expression) {