Lazy enumerable?

lazy.rb

class Lazy
  include Enumerable

  def initialize(max_iterations=nil, &block)
    @max_iterations = max_iterations
    @iterations = 0
    @block = block
  end

  def each
    while @max_iterations.nil? || @iterations < @max_iterations
      @last = @block.call(@last)
      yield @last
      @iterations += 1
    end
  end
end

l = Lazy.new(100) do |x|
  (x || 0) + 1
end

l.each {|x| puts x; break if x > 50}
puts l.to_a.inspect