# 导出结构体和字段
# 1.1 method继承
method是可以继承的，如果匿名字段实现了一个method，那么包含这个匿名字段的struct也能调用该method
package main
import "fmt"
type Human struct {
name string
age int
phone string
}
type Student struct {
Human //匿名字段
school string
}
type Employee struct {
Human //匿名字段
company string
}
func (h *Human) SayHi() {
fmt.Printf("Hi, I am %s you can call me on %s\n", h.name, h.phone)
}
func main() {
mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}
mark.SayHi()
sam.SayHi()
}
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运行结果：
Hi, I am Mark you can call me on 222-222-YYYY
Hi, I am Sam you can call me on 111-888-XXXX
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# 1.2 method重写
package main
import "fmt"
type Human struct {
name string
age int
phone string
}
type Student struct {
Human //匿名字段
school string
}
type Employee struct {
Human //匿名字段
company string
}
//Human定义method
func (h *Human) SayHi() {
fmt.Printf("Hi, I am %s you can call me on %s\n", h.name, h.phone)
}
//Employee的method重写Human的method
func (e *Employee) SayHi() {
fmt.Printf("Hi, I am %s, I work at %s. Call me on %s\n", e.name,
e.company, e.phone) //Yes you can split into 2 lines here.
}
func main() {
mark := Student{Human{"Mark", 25, "222-222-YYYY"}, "MIT"}
sam := Employee{Human{"Sam", 45, "111-888-XXXX"}, "Golang Inc"}
mark.SayHi()
sam.SayHi()
}
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运行结果：
Hi, I am Mark you can call me on 222-222-YYYY
Hi, I am Sam, I work at Golang Inc. Call me on 111-888-XXXX
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- 方法是可以继承和重写的
- 存在继承关系时，按照就近原则，进行调用