Minimal fsm (finite state machine) in golang.

main.go

package main

import "fmt"

// State provides the minimal state machine
type State func() (next State)

func tick() State {
	fmt.Println("tick...")
	return tock
}

func tock() State {
	fmt.Println("tock...")
	return tick
}

func main() {
	state := tick
	for i := 0; i < 10; i++ {
		state = state()
	}
}