abstract

type Set1 interface {
	Count() int
	String() string
	IsNone() bool
	IsAll() bool
	Has(int) bool
	LessCount(int) int
	MoreCount(int) int
	Min() int
	Max() int
	Each() iter.Seq[int]
	Ranges() iter.Seq2[int, int]
}

type Set2 interface {
	Set1
	Add(int)
	Remove(int)
	SetNot()
	SetNone()
	SetAll()
}

type Set3[T Set1] interface {
	Set1
	Equal(T) bool
	Compare(T) int
	HasNone(T) bool
	HasAll(T) bool
	AndCount(T) int
	Not() T
	Sub(T) T
	And(T) T
	Or(T) T
	Xor(T) T
	Nor(T) T
	Iff(T) T
	Imply(T) T
}

type Set4[T Set1] interface {
	Set2
	Set3[T]
	Assign(T)
	SetSub(T)
	SetAnd(T)
	SetOr(T)
	SetXor(T)
	SetNor(T)
	SetIff(T)
	SetImply(T)
}