class SassC::Script::Value::List

def to_sass(opts = {})
  return bracketed ? "[]" : "()" if value.empty?
  members = value.map do |v|
    if element_needs_parens?(v)
      "(#{v.to_sass(opts)})"
    else
      v.to_sass(opts)
    end
  end
  if separator == :comma && members.length == 1
    return "#{bracketed ? '[' : '('}#{members.first},#{bracketed ? ']' : ')'}"
  end
  contents = members.join(sep_str(nil))
  bracketed ? "[#{contents}]" : contents
end