Prime number enumerator using Fiber

fiber-prime.rb

def fiber_manager(j, g)
  fiber_manager((nf = Fiber.new do |i, f|
    print "#{i} "
    while (n = f.resume) % i == 0; end
    Fiber.yield(n)
    loop do
      n = f.resume
      Fiber.yield(n) if n % i != 0
    end
  end).resume(j, g), nf)
end

fiber_manager(2, Fiber.new do
  i = 1
  loop do
    Fiber.yield(i += 1)
  end
end)