Functional game loop

main.go

package main

import "fmt"

type coords struct {
	x int
	y int
}

type apple struct {
	position coords
}

type gameState struct {
	apple apple
}

func logic(state *gameState) {
	state.apple.position.x = state.apple.position.x + 1
}

func gameLoop(running bool, state *gameState) bool {
	if running == false {
		return false
	}
	logic(state)
	return gameLoop(running, state)
}

func main() {

  // set the initial game state
	state := gameState{
		apple: apple{
			position: coords{
				x: 2,
				y: 2,
			},
		},
	}

	gameLoop(true, &state)
}