Rack::Builder

# File lib/rack/flash.rb, line 23
def leaf_app
  ins.last
end

# File lib/rack/flash.rb, line 14
def run(app)
  klass = app.class
  klass.instance_variable_set "@rack_builder", self
  def klass.rack_builder
    @rack_builder
  end
  @ins << app #lambda { |nothing| app }
end

# File lib/rack/flash.rb, line 4
def use(middleware, *args, &block)
  middleware.instance_variable_set "@rack_builder", self
  def middleware.rack_builder
    @rack_builder
  end
  @ins << lambda { |app|
    middleware.new(app, *args, &block)
  }
end