lib/sub_diff/diff.rb in sub_diff-0.0.0 vs lib/sub_diff/diff.rb in sub_diff-1.0.0

@@ -1,22 +1,22 @@
+require 'delegate'
+
 module SubDiff
-  class Diff
-    attr_reader :value, :value_was
-    alias_method :to_s, :value
+  class Diff < SimpleDelegator
+    attr_reader :value_was
 
+    alias_method :value, :__getobj__
+
     def initialize(value, value_was = nil)
-      @value, @value_was = value, value_was || value
+      @value_was = value_was || value
+      super(value)
     end
 
     def changed?
-      @changed ||= value != value_was
+      value != value_was
     end
 
-    def method_missing(*args, &block)
-      to_s.send(*args, &block)
+    def empty?
+      value.empty? && !changed?
     end
-
-    def respond_to_missing?(method, include_private)
-      to_s.respond_to?(method, include_private)
-    end
   end
-end
\ No newline at end of file
+end