mjacobus / koine-attributes

  module Attributes

    module Adapter

      class Base

        def coerce(*_values)

          raise NotImplementedError

        end

        def default_value

          @default_value.respond_to?(:call) &&

            @default_value.call ||

            @default_value

        end

        def with_default_value(value = nil, &block)

          @default_value = value

          @default_value = block if block

          self

        end

        protected

        # duplicates if possible and freezes object

    end

  end

end