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example1.go
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example1.go
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// Copyright 2014 Ardan Studios
//
// All material is licensed under the Apache License Version 2.0, January 2004
// http://www.apache.org/licenses/LICENSE-2.0
// Sample program to show how what we are doing is NOT embedding
// a type but just using a type as a field.
package main
import "fmt"
// user defines a user in the program.
type user struct {
name string
email string
}
// notify implements a method notifies users
// of different events.
func (u *user) notify() {
fmt.Printf("Sending user email To %s<%s>\n",
u.name,
u.email)
}
// admin represents an admin user with privileges.
type admin struct {
person user // NOT Embedding
level string
}
func main() {
// Create an admin user.
ad := admin{
person: user{
name: "john smith",
email: "john@yahoo.com",
},
level: "super",
}
// We can access fields methods.
ad.person.notify()
}
// Outputs:
// Sending user email To john smith<john@yahoo.com>