Go unsafe

时间：2021-07-22 10:59:59

参考：

Go unsafe

// uintptr is an integer type that is large enough to hold the bit pattern of
// any pointer.
type uintptr uintptr

type A struct { Name string}

func (a *A) Method1() { fmt.Println("a method 1")}

type B struct { Name string Age  int}

func (b *B) Method1() { fmt.Println("b method 1")}

func (b *B) Method2() { fmt.Println("b method 2")}

func main() {
    a := &A{}
    a.Method1()

    b := (*B)(unsafe.Pointer(a))
    b.Method1()
    b.Method2()

    a = (*A)(unsafe.Pointer(b))
    a.Method1()
}

# 输出
a method 1
b method 1
b method 2
a method 1