BitInquirer

bit_inquirer.rb

class BitInquirer
  def self.[](mask_map)
    Class.new(SimpleDelegator) do
      mask_map.each do |name, mask|
        define_method name do
          allbits?(mask)
        end
      end
    end
  end
end

main.rb

# BitInquirer usage:

Permissions = BitInquirer[
  create: 0b1,
  read: 0b10,
  update: 0b100,
  delete: 0b1000
]

me = Permissions.new(6)

me.create? # false
me.read? # true
me.update? # true
me.delete? # false