src/thue/program.cr


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require "./thue.cr"
require "./parser.cr"

class Thue::Program
  def initialize(@parser : Parser)
  end

  def interpret
    rules, state = @parser.parse

    loop do
      r = rules.find { |r| r.matches?(state) }
      break if r.nil?

      state = state.sub(r.pattern, r.replacement)
    end

    puts state
  end
end