interface+pointer sample

main.go

package main

import (
	"fmt"
)

type Hoge interface {
	Flush()
}

type Fuga struct {
	Count int
}

func (f *Fuga) Flush() {
	f.Count++
	fmt.Println("flush: ", f.Count)
}

func (f Fuga) DisplayCount() {
	fmt.Println("count: ", f.Count)
}

func Call(h Hoge) {
	h.Flush()
}

func Call2(f Fuga) {
	f.Flush()
}

func main() {
	f := &Fuga{}
	Call(f)
	Call(f)
	Call(f)
	Call2(*f)
	f.DisplayCount()
}