bonusdeferpanicrecover.go

package main

import (
	"fmt"
)

type Callback func()

func JustPrintIt(msg string) {
	fmt.Println(msg)
}

func catchThePanic(next ...Callback) {
	if r := recover(); r != nil {
		JustPrintIt(fmt.Sprintf("Recovered : %v", r))
		if len(next) > 0 {
			for _, callback := range next {
				callback()
			}
		}
	}
}

func NextCall() {
	JustPrintIt("Normal function")
}

func NextPanic() {
	defer catchThePanic()
	panic("second panic")
}

func DoPanic() {
	defer catchThePanic(NextCall, NextPanic, NextCall)
	defer JustPrintIt("O")
	defer JustPrintIt("F")
	defer JustPrintIt("I")
	defer JustPrintIt("L")

	panic("this is panic")
}

func main() {
	DoPanic()
}