go defer特点

  • 后进先出原则
  • 报错也不会阻断defer输出
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    func test_error(x int) {
    	result := 100 / x
    	fmt.Println("result = ", result)
    }
    func main() {
    	defer fmt.Println("aaaaaaaaaaaaaaaa")
    	defer fmt.Println("bbbbbbbbbbbbbbbb")
    	//调用一个报错函数
    	defer test_error(0)
    	defer fmt.Println("cccccccccccccccc")
       
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[Running] go run "d:\go work\test.go"
cccccccccccccccc
bbbbbbbbbbbbbbbb
aaaaaaaaaaaaaaaa
panic: runtime error: integer divide by zero

goroutine 1 [running]:
main.test_error(0x7961f0)
	d:/go work/test.go:9 +0xad
main.main()
	d:/go work/test.go:26 +0x132
exit status 2

[Done] exited with code=1 in 1.094 seconds
go

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