凹语言支持for range迭代器 #

func main {
	for i := range 3 {
		println(i)
	}
}

type MyObject :struct {
	elems: []string
}

func New(a: ...string) => *MyObject {
	return &MyObject{elems: a}
}

func MyObject.Iter => func => (ok: bool, k: int, v: string) {
	idx: int
	return func => (ok: bool, k: int, v: string) {
		if ok = idx < len(this.elems); ok {
			k, v = idx, this.elems[idx]
			idx++
		}
		return
	}
}

func main {
	for i, v := range New("aa", "bb", "cc").Iter() {
		println(i, v)
	}
}