)

// ExpirationDays is a type alias to unmarshal Days in Expiration
type ExpirationDays int

// UnmarshalXML parses number of days from Expiration and validates if
// greater than zero
func (eDays *ExpirationDays) UnmarshalXML(d *xml.Decoder, startElement xml.StartElement) error {
	var numDays int

	lc := Lifecycle{
		Rules: []Rule{
			{
				Status:     "Enabled",
				Filter:     Filter{Prefix: Prefix{string: "prefix-1", set: true}},
				Expiration: Expiration{Days: ExpirationDays(3)},
			},
			{
				Status:     "Enabled",
				Filter:     Filter{Prefix: Prefix{string: "prefix-1", set: true}},
				Expiration: Expiration{Date: midnightTS},
			},
			{