go interface
package main
import (
"fmt"
)
// 接口可以让函数更抽象
type Blunt interface {
Beat() string
}
type Hammer struct {
}
func (h Hammer) Beat() string {
return "duang!!!"
}
type Wrench struct {
}
func (w Wrench) Beat() string {
return "pang!!!"
}
func BluntSound(b Blunt) {
fmt.Println(b.Beat())
}
// 也可以为函数增方法
type Tester interface {
Do()
PrintPoint()
}
type FuncClass func()
func (self *FuncClass) PrintPoint() { fmt.Printf("my point:%p\n", self) }
func (self *FuncClass) Do() { (*self)() }
var testGroup = []func(){
func() {
h := Hammer{}
w := Wrench{}
// 只要类型实现了接口的方法，就可以自动转换
BluntSound(h)
BluntSound(w)
},
func() {
funcInstance := FuncClass(func() { fmt.Println("Hello, World!") })
var t Tester = &funcInstance
t.Do()
t.PrintPoint()
},
}
func main() {
for index, function := range testGroup {
fmt.Println("test", index+1)
function()
}
}