package main 
import "fmt" 
type BaseIntf interface {
 Process()
}
 
type Msg1 struct {
 req int
 rsp int
}
 
func (p *Msg1) Process() {
 fmt.Println("process 1")
}
 
type Msg2 struct {
 req int
 rsp int
}
 
func (p *Msg2) Process() {
 fmt.Println("process 2")
}
 
func main() {
 m1 := new(Msg1)
 m1.Process()
 
 m2 := new(Msg2)
 m2.Process()
}

package main 
import "fmt" 
type BaseIntf interface {
 Process()
}
 
func Run(proc BaseIntf) {
 fmt.Println("run")
 proc.Process()
}
 
type Msg1 struct {
 req int
 rsp int
}
 
func (p *Msg1) Process() {
 fmt.Println("process 1")
} 
 
type Msg2 struct {
 req int
 rsp int
}
 
func (p *Msg2) Process() {
 fmt.Println("process 2")
} 
 
func main() {
 m1 := new(Msg1)
 Run(m1)
 
 m2 := new(Msg2)
 Run(m2)
}

package main
type Person struct {
 name string
 age int
}
type Cat struct {
 kind string
 sex bool
 price int
}
func main() {
 family := make([]interface{},0,10)
 obj1 := &Person{
 name: "吕云飞",
 age: 28,
 }
 obj2 := &Person{
 name: "胡景茹",
 age: 18,
 }
 obj3 := &Cat{
 kind: "英短",
 sex: true,
 price: 2000,
 }
 family = append(family, obj1, obj2, obj3)
 for _, value := range family {
 switch obj := value.(type) {
 case *Person:
 print(obj.name + "\n")
 case *Cat:
 print(obj.kind + "\n")
 }
 }
}