- if !title?
  - if attr?(:style, 'source') && attr?(:language)
    programlisting(id=@id role=(attr :role) xreflabel=(attr :reftext) language=(attr :language)
        linenumbering=((attr? :linenums) ? 'numbered' : 'unnumbered')) =content
  - else
    screen id=@id role=(attr :role) xreflabel=(attr :reftext) =content
- else
  formalpara id=@id role=(attr :role) xreflabel=(attr :reftext)
    title=title
    para
      - if attr?(:style, 'source') && attr?(:language)
        programlisting language=(attr :language) linenumbering=((attr? :linenums) ? 'numbered' : 'unnumbered') =content
      - else
        screen=content