# coding: utf-8

module Rpn
  class Runner
    def initialize; end

    def run_input( stack, dictionary, input )
      input.each do |elt|
        case elt[:type]
        when :word
          command = dictionary.lookup( elt[:value] )

          if command.nil?
            stack << { type: :name, value: "'#{elt[:value]}'" }
          else
            stack = command.call( stack )
          end
        else
          stack << elt
        end
      end

      [stack, dictionary]
    end
  end
end