golang 闭包

var test = func(a int, b int) (int, float64) {
    return 0, 0
}

func main() {
    test(1, 2)
}

func test(f func(i int) int) {
    f(1)

}
func testInner(i int) int {
    fmt.Println(i)
    return i
}
func main() {
    test(testInner)
    return
}

type testInner func(i int) int

func test() testInner {
    return func(i int) int {
        return 0
    }

}
func main() {
    s := test()
    ret := s(1)
    fmt.Println(ret)
    return
}