embed_func1.go

package main

import "fmt"

type Log struct {
	msg string
}

// Customer 内嵌log，customer继承， 或者更像mixin  log 类型的所有方法
type Customer struct {
	Name string
	log  *Log
}

// https://github.com/unknwon/the-way-to-go_ZH_CN/blob/master/eBook/10.6.md
func main() {
	c := new(Customer)
	c.Name = "Barak Obama"
	c.log = new(Log)
	c.log.msg = "1 - Yes we can!"
	// shorter
	c = &Customer{"Barak Obama", &Log{"1 - Yes we can!"}}
	// fmt.Println(c) &{Barak Obama 1 - Yes we can!}
	c.Log().Add("2 - After me the world will be a better place!")
	//fmt.Println(c.log)
	fmt.Println(c.Log())
	fmt.Println(c.Log().String())

}

func (l *Log) Add(s string) {
	l.msg += "\n" + s
}

func (l *Log) String() string {
	return l.msg
}

func (c *Customer) Log() *Log {
	return c.log
}