class Object
  def self.yaml_tag url
    Psych.add_tag(url, self)
  end

  # FIXME: rename this to "to_yaml" when syck is removed

  ###
  # call-seq: to_yaml(options = {})
  #
  # Convert an object to YAML.  See Psych.dump for more information on the
  # available +options+.
  def psych_to_yaml options = {}
    Psych.dump self, options
  end
  remove_method :to_yaml rescue nil
  alias :to_yaml :psych_to_yaml
end

class Module
  def psych_yaml_as url
    return if caller[0].end_with?('rubytypes.rb')
    if $VERBOSE
      warn "#{caller[0]}: yaml_as is deprecated, please use yaml_tag"
    end
    Psych.add_tag(url, self)
  end

  remove_method :yaml_as rescue nil
  alias :yaml_as :psych_yaml_as
end

if defined?(::IRB)
module Kernel
  def psych_y *objects
    puts Psych.dump_stream(*objects)
  end
  remove_method :y rescue nil
  alias y psych_y
  private :y
end
end