Github copilot test with Tic Tac Toe in Go

tictactoe.go

// Tic Tac Toe in Go
package main

import (
	"fmt"
)

type XO int

const (
	None XO = iota
	X
	O
	Draw
)

func (xo XO) String() string {
	if xo == X {
		return "X"
	}
	return "O"
}

type Board [9]XO

func (b Board) Check() XO {
	lines := [][3]int{
		{0, 1, 2},
		{3, 4, 5},
		{6, 7, 8},
		{0, 3, 6},
		{1, 4, 7},
		{2, 5, 8},
		{0, 4, 8},
		{2, 4, 6},
	}

	// Check for X, then check for O
	// If X wins, return X
	// If O wins, return O
	// If draw, return Draw
	// Otherwise, return None
	for _, line := range lines {
		if b[line[0]] == X && b[line[1]] == X && b[line[2]] == X {
			return X
		}
		if b[line[0]] == O && b[line[1]] == O && b[line[2]] == O {
			return O
		}
	}
	for _, xo := range b {
		if xo == None {
			return None
		}
	}
	return Draw
}

// Get X or O from board position as string, if None get the position number instead converted to string
func (b Board) Get(pos int) string {
	if b[pos] == None {
		return fmt.Sprintf("%d", pos)
	}
	return b[pos].String()
}

// Board string representation
func (b Board) String() string {
	return fmt.Sprintf("%s|%s|%s\n%s|%s|%s\n%s|%s|%s", b.Get(0), b.Get(1), b.Get(2), b.Get(3), b.Get(4), b.Get(5), b.Get(6), b.Get(7), b.Get(8))
}

// Game loop as main function
func main() {
	var board Board
	var turn XO
	turn = X
	for {
		fmt.Println(board)
		fmt.Printf("%s's turn\n", turn)
		var pos int
		fmt.Scanf("%d", &pos)
		board[pos] = turn
		if turn == X {
			turn = O
		} else {
			turn = X
		}
		if board.Check() != None {
			fmt.Println(board)
			if board.Check() == Draw {
				fmt.Println("Draw")
			} else {
				fmt.Println(board.Check(), "has won!")
			}
			break
		}
	}
}

To make it clear, I didn't let Copilot write it all, when I knew how to do it Copilot wrote the functions for it.