class Inspec::List

def map
  raise 'Inspec::List.map needs to be called with a block' unless block_given?
  t = List.new
  t.qualifier = [['x']]
  yield(t)
  return if t.qualifier == [['x']]
  @qualifier.push(['map', "{ |x| #{t.to_ruby} }"])
  self
end