package main

import "fmt"

type demo struct {
	Val int
}

func (d *demo) change() {
	d = nil // Assignment to the method receiver propagates only to callees but not to callers
	d.myVal()
}

func (d *demo) myVal() {
	fmt.Printf("my val: %#v\n", d)
}

func (d demo) change2() {
	d = demo{} // Assignment to the method receiver doesn't propagate to other calls
	d.myVal()
}

func (d *demo) change3() {
	d.Val = 3
	d.myVal()
}

func main() {
	d := &demo{}
	d.myVal()
	d.change()
	d.myVal()
	d.Val = 2
	d.change2()
}