class RDoc::RI::Store

def save_class klass
  FileUtils.mkdir_p class_path(klass.full_name)
  @cache[:modules] << klass.full_name
  path = class_file klass.full_name
  begin
    disk_klass = nil
    open path, 'rb' do |io|
      disk_klass = Marshal.load io.read
    end
    klass.merge disk_klass
  rescue Errno::ENOENT
  end
  # BasicObject has no ancestors
  ancestors = klass.ancestors.compact.map do |ancestor|
    # HACK for classes we don't know about (class X < RuntimeError)
    String === ancestor ? ancestor : ancestor.full_name
  end
  @cache[:ancestors][klass.full_name] ||= []
  @cache[:ancestors][klass.full_name].push(*ancestors)
  attributes = klass.attributes.map do |attribute|
    "#{attribute.type} #{attribute.name}"
  end
  unless attributes.empty? then
    @cache[:attributes][klass.full_name] ||= []
    @cache[:attributes][klass.full_name].push(*attributes)
  end
  open path, 'wb' do |io|
    Marshal.dump klass, io
  end
end