golang学习的点点滴滴：接口组合

package main
import "fmt"

type IReader interface {
Read(file string) []byte
}

type IWriter interface {
Write(file string, data []byte)
}

// 接口组合， 这些默认就继承了Reader和Writer中的抽象方法
type IReadWriter interface {
IReader
IWriter
}

type ReadWriter struct {

}

func (rw *ReadWriter) Read(file string) []byte {
return nil
}

func (rw *ReadWriter) Write(file string, data []byte) {

}

func main() {
rw := new(ReadWriter)
var iRw IReadWriter = rw // ok
fmt.Println(iRw)
}