lib/dry/struct/errors.rb in dry-struct-0.4.0 vs lib/dry/struct/errors.rb in dry-struct-0.5.0

@@ -9,7 +9,14 @@
       #   attribute name that is the same as previously defined one
       def initialize(key)
         super("Attribute :#{key} has already been defined")
       end
     end
+
+    # Raised when a struct doesn't have an attribute
+    class MissingAttributeError < KeyError
+      def initialize(key)
+        super("Missing attribute: #{ key.inspect }")
+      end
+    end
   end
 end