lib/bmg/operator/shared/unary.rb in bmg-0.16.7 vs lib/bmg/operator/shared/unary.rb in bmg-0.17.0

@@ -1,16 +1,24 @@
 module Bmg
   module Operator
     module Unary
       include Operator
 
+      def bind(binding)
+        _with_operand(operand.bind(binding))
+      end
+
     protected
 
-      attr_reader :operand
+      attr_accessor :operand
 
       def _visit(parent, visitor)
         visitor.call(self, parent)
         operand._visit(self, visitor)
+      end
+
+      def _with_operand(operand)
+        dup.tap{|d| d.operand = operand }
       end
 
       def operands
         [operand]
       end