advent7.rb

require 'pry'

class Circuit

  TRANSFORMS = {
    "LSHIFT" => "<<",
    "RSHIFT" => ">>",
    "NOT" => "~",
    "AND" => "&",
    "OR" => "|",
    /\b(if|do|in)\b/ => "\\1_",
  }

  def add(line)
    TRANSFORMS.each do |from, to|
      line.gsub!(from, to)
    end

    expr, name = line.strip.split(" -> ")

    method = "def #{name}; @#{name} ||= #{expr}; end"

    puts method
    instance_eval method
  end
end

circuit = Circuit.new
open("advent7.txt").each_line { |line| circuit.add(line) }
# circuit.add("46065 -> b")
p circuit.a