golang goto 测试

goto.go

package main

import (
	"fmt"
	"sync/atomic"
)

var b = 1

func main() {
	run2()
	run()
}

func run2() {
retry:
	fmt.Println("222")
	if b != 1 {
		goto retry
	}
}

func run() {
	var a int64 = 1
	goto exit

exit:
	fmt.Println("exit", a)
	atomic.AddInt64(&a, 1)

	if a == 10 {
		return
	}
	goto exit
}

// output:
// 222
// exit 1
// exit 2
// exit 3
// exit 4
// exit 5
// exit 6
// exit 7
// exit 8
// exit 9