# Delete a directory and all of its content, return `true` on success
	#
	# Does not go through symbolic links and may get stuck in a cycle if there
	# is a cycle in the filesystem.
	#
	# Return an error object in case of error.
	#
	#     assert "/fail/does not/exist".rmdir != null
	fun rmdir: nullable Error
	do
		var p = to_path
		p.rmdir
		return p.last_error
	end