lib/gobstones/lang/expressions/var_name.rb in gobstones-0.0.2 vs lib/gobstones/lang/expressions/var_name.rb in gobstones-0.0.3

@@ -1,37 +1,33 @@
-require 'gobstones/modules/equal_by_class'
+require 'gobstones/lang/expressions/expression'
 
 module Gobstones
-
   module Lang
-
-    class VarName
-
-      include Gobstones::EqualByClass
-
+    class VarName < Expression
       attr_reader :name
 
       def initialize(name)
         @name = name
       end
 
-      def ==(var)
-        super(var) && self.name == var.name
+      def equality_attributes
+        %i[name]
       end
 
       def hash
-        @name.hash
+        name.hash
       end
 
       def evaluate(context)
-        context.get self
+        context.get(self)
       end
 
       def named?(a_name)
         name == a_name
       end
 
+      def to_s
+        "variable named '#{name}'"
+      end
     end
-
   end
-
 end