polymorphism in Go.

polymorphism.go

package main

import "fmt"

type IF interface {
	GetID() int64
	GetName() string
}

type A struct {
	id int64
	name string
}

func NewA(id int64, name string) A {
	return A{ id, name}
}

func (a A) GetID() int64 {
	return a.id
}

func (a A) GetName() string {
	return a.name
}


type B struct {
	id int64
	name string
}

func NewB(id int64, name string) B {
	return B{ id, name}
}

func (b B) GetID() int64 {
	return b.id
}

func (b B) GetName() string {
	return b.name
}

func main() {
	arr := make([]IF, 0, 10)
	a := NewA(0, "hoge")
	b := NewB(1, "fuga")
	arr = append(arr, a)
	arr = append(arr, b)

	for _, val := range arr {
		fmt.Printf("id : %d name : %s\n", val.GetID(), val.GetName())
	}
}