hook

type Binding struct {
	NameIndex    int
	FormalsIndex int
}

type Node[V, E any] struct {
	Node     *V
	Owner    *V
	Formals  *V
	Init     *V
	Op       string
	Depth    int
	Head     bool
	Bound    bool
	Function bool
	Outer    bool
	Template bool
	Event    E
}

type Options[V, E any] struct {
	Visit            func(*Node[V, E]) bool
	BindingForm      func(*V) *Binding
	Reference        func(*V)
	Form             func(*V, string, int) bool
	End              func(int)
	EndDepth         *int
	SkipLiterals     bool
	DeclarationsOnly bool
}