package main

import (
   "fmt"
   "errors"
)

func main()  {

   testPanic()

}

func testPanic()  {
   defer coverPanic()
   
   //panic("i am panic")
   panic(errors.New(" i am a error"))
}

func coverPanic()  {
   message := recover()
   switch message.(type) {
   case string:
      fmt.Println("string message",message)

   case error:
      fmt.Println("error message",message)
   default:
      fmt.Println("unknown message",message)
   }
}