       isNumber: -> false
       preceedingSubexpression: -> false
       clone: -> @ # by default, cloning does nothing
+
+
+    class Equals extends ExpressionComponent
+      toString: -> "="
+      isOperator: -> true
+    class_mixer(Equals)
+
 
     class Expression extends ExpressionComponent
       @buildWithContent: (content)->

        @future_as_decimal = opts.future_as_decimal

      toString: ->
        "N(#{@val})"

      isNumber: -> true


      size: ->
        _(@expression).size();

      isBlank: ->
        @size() == 0

      set: (expression)->
        @expression = expression

