methodsetspointers.go

// type *T
// The method set of the corresponding pointer type *T is the set of all methods declared with receiver *T or T (that is, it also contains the method set of T).

package main

import (
	"fmt"
)

type Person struct {
	first string
}

type secretAgent struct {
	Person
	ltk bool
}

func (p *Person) speak() {
	fmt.Println("from person", p.first)
}

func (sa *secretAgent) speak() {
	fmt.Println("from secret agent", sa.first)
}

type human interface {
	speak()
}

func saySomething(h human) {
	h.speak()
}

func main() {

	p1 := Person{
		first: "Jorgen",
	}

	sa1 := secretAgent{
		Person: Person{
			first: "Ula Britta Frita Smirta",
		},
		ltk: true,
	}

	saySomething(&p1)
	saySomething(&sa1)
}