obj

type Accessor[S any, T any] interface {
	Get(s S) T
	Name() string
	Set(s S, v T)
}

type DeleteBuilder[S any] interface {
	Where(filters ...Matcher[S]) DeleteBuilder[S]
	Run() (deleted []S, err error)
}

type InsertBuilder[S any] interface {
	Set(mutators ...Mutator[S]) InsertBuilder[S]
	Run() (inserted S, err error)
}

type Lesser[S any] interface {
	Less(i, j S) int
}

type Matcher[S any] interface {
	Match(s S) bool
}

type Mutator[S any] interface {
	Mutate(s S)
}

type SelectBuilder[S any] interface {
	Where(filters ...Matcher[S]) SelectBuilder[S]
	OrderBy(orderBys ...Lesser[S]) SelectBuilder[S]
	Run() (results []S, err error)
}

type SpecFactory[S any] interface {
	New() S
}

type Storage[S any] interface {
	Delete(filters Matcher[S]) (deleted []S, err error)
	Insert(mutators []Mutator[S]) (inserted S, err error)
	Select(
		filters Matcher[S],
		orderBys []Lesser[S],
	) (results []S, err error)
	NewDeleteBuilder() DeleteBuilder[S]
	NewInsertBuilder() InsertBuilder[S]
	NewSelectBuilder() SelectBuilder[S]
	Update(
		filters Matcher[S],
		mutators []Mutator[S],
		orderBys []Lesser[S],
	) (updated []S, err error)
}

type UpdateBuilder[S any] interface {
	OrderBy(orderBys ...Lesser[S]) UpdateBuilder[S]
	Run() (updated []S, err error)
	Set(mutators ...Mutator[S]) UpdateBuilder[S]
	Where(filters ...Matcher[S]) UpdateBuilder[S]
}