custom attrs

attrs.rb

module Attrs
  
   def attr_initialize(*vars)
      define_method(:initialize) do |*values|
         unless values.length == vars.length
            raise ArgumentError, "wrong number of arguments (#{values.length} for #{vars.length})"
         end
         
         vars.zip(values).each do |var, value|
            instance_variable_set("@#{var}", value)
         end
      end
   end
   
   def attr_prop_initialize(*vars)
      attr_initialize *vars
      attr_accessor *vars
   end
   
end

class Class
  include Attrs
end

test.rb

require_relative "attrs"

class Test
   attr_prop_initialize :t1, :t2
   
   def add
      @t1 + @t2
   end
end

t = Test.new(1, 2)

puts t.t1
puts t.add