// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package a

type Option[T any] interface {
	ToSeq() Seq[T]
}

type Seq[T any] []T

func (r Seq[T]) Find(p func(v T) bool) Option[T] {
	panic("")

		},
		GetNext: func() T {
			ret := r[idx]
			idx++
			return ret
		},
	}
}

type Iterator[T any] struct {
	IsHasNext func() bool
	GetNext   func() T
}

func (r Iterator[T]) ToSeq() Seq[T] {
	ret := Seq[T]{}
	for r.HasNext() {
		ret = append(ret, r.Next())
	}
	return ret
}

func (r Iterator[T]) Map(f func(T) any) Iterator[any] {
	return MakeIterator(r.HasNext, func() any {