none.rb in muina-0.6.0

- old
+ new

@@ -2,11 +2,11 @@
 
 module Muina
   class Maybe
     class None < self
       private_class_method(:new)
-      def initialize
+      def initialize # rubocop:disable Lint/MissingSuper
         freeze
       end
 
       def some?
         false
@@ -15,23 +15,21 @@
       def none?
         true
       end
 
       def value!
-        raise
+        raise UnwrappingError
       end
 
       def value_or(default)
         default
       end
 
       def value_or_yield
         yield
       end
 
-      def value_or_nil
-        nil
-      end
+      def value_or_nil; end
 
       def and_then
         self
       end
 