option

func Bool(dft bool, bools ...bool) bool

func Byte(dft byte, bytes ...byte) byte

func Int(dft int, ints ...int) int

func Int16(dft int16, int16s ...int16) int16

func Int32(dft int32, int32s ...int32) int32

func Int64(dft int64, int64s ...int64) int64

func Int8(dft int8, int8s ...int8) int8

func Interface(dft interface{}, interfaces ...interface{}) interface{}

func Rune(dft rune, runes ...rune) rune

func String(dft string, strings ...string) string

func Uint(dft uint, uints ...uint) uint

func Uint16(dft uint16, uint16s ...uint16) uint16

func Uint32(dft uint32, uint32s ...uint32) uint32

func Uint64(dft uint64, uint64s ...uint64) uint64

func Uint8(dft uint8, uint8s ...uint8) uint8