# File lib/ruote/svc/expression_map.rb, line 66
    def initialize(worker)

      @map = {}

      Ruote::Exp.constants.each do |con|

        con = con.to_s
        next unless con.match(/Expression$/)

        cla = Ruote::Exp.const_get(con)
        next unless cla.respond_to?(:expression_names)

        add(cla)
      end
    end