go 调用函数 函数里边defer、log和调用函数层级 defer、log执行顺序

go 调用函数 函数里边defer、log和调用函数层级 defer、log执行顺序

import (
  "fmt"
  "log"
)

func main() {
  defer fmt.Println("DemoReturn-start")
  s := DemoReturn(1)
  fmt.Println(s)
  log.Println("main-log1")
  defer fmt.Println("DemoReturn-stop1")
  defer fmt.Println("DemoReturn-stop2")
}

func DemoReturn(i int) int {
  defer fmt.Println("DemoReturn1")
  defer fmt.Println("DemoReturn2")
  defer fmt.Println("DemoReturn3")
  log.Println("DemoReturn-log1")
  log.Println("DemoReturn-log2")
  defer fmt.Println("DemoReturn4")
  defer fmt.Println("DemoReturn5")
  return i + 1
}