// If v's kind is Pointer, the pointer element type must have kind Array.
// Otherwise v's kind must be Array, Map, Slice, or String.
func (v Value) Seq2() iter.Seq2[Value, Value] {
	if canRangeFunc2(v.typ()) {
		return func(yield func(Value, Value) bool) {
			rf := MakeFunc(v.Type().In(0), func(in []Value) []Value {
				return []Value{ValueOf(yield(in[0], in[1]))}
			})
			v.Call([]Value{rf})
		}
	}

}

func (t *rtype) CanSeq2() bool {
	switch t.Kind() {
	case Array, Slice, String, Map:
		return true
	case Func:
		return canRangeFunc2(&t.t)
	case Pointer:
		return t.Elem().Kind() == Array
	}
	return false
}

func canRangeFunc2(t *abi.Type) bool {
	if t.Kind() != abi.Func {
		return false
	}
	f := t.FuncType()
	if f.InCount != 1 || f.OutCount != 0 {
		return false
	}