Question

如何在golang中实现虚函数？我试过这个，但我不能打印“B”

type A struct {
}

type B struct {
  A
}

func (self A) myVirtualFunction() {
    fmt.Println("A again :(")
}

func (self A) f() {
    self.myVirtualFunction()
}

func (self B) myVirtualFunction(){
    fmt.Println("B :)")
}

func main() {
    var b *B = new(B)
    b.f()
}

https://play.golang.org/p/Eq59SZuC7p

Answer 1

使用Golang接口方法代替C ++（纯）虚函数：
对于The Go Way来说，看看包裹排序：

>>> 
{'[1, 2, 3]': 2, '[1, -2, 3]': 1, '[2, 1, 3]': 2}
{'[1, 2, 3]': 4, '[2, 1, 3]': 1, '[0, 2, 3]': 1}
>>>

和示例（按年龄自定义排序）：

type Interface interface {
    // Len is the number of elements in the collection.
    Len() int
    // Less reports whether the element with
    // index i should sort before the element with index j.
    Less(i, j int) bool
    // Swap swaps the elements with indexes i and j.
    Swap(i, j int)
}

如何在golang中实现虚函数？

1 个答案: