Hello.
You can achieve this by using a named return value and overwriting it in a
deferred function, like so: https://play.golang.org/p/4HvVQ6N-I9
Note that the value returned by recover() is not guaranteed to be an error.
In my toy example, I work around this fact by passing it to fmt.Errorf in
order to produce an error. This feels somewhat brittle and unpleasant.
On Friday, March 24, 2017 at 6:13:57 AM UTC+1, Henry wrote:
>
> Hi,
>
> I would like to shield my application from any possible panicking by the
> third-party library. There was an occasion when a third party library
> crashed my application due to unnecessary panicking. I am thinking
> of creating a thin wrapper that will also catch any panic into error. How
> can I do that in Go?
>
> func PanicFunction() {
> panic("Panic!")
> }
>
> func MustNotPanic() error {
> defer func(){
> if err:=recover(); err!=nil{
> //ermm ... how do you return error from here?
> }
> }()
> PanicFunction()
> }
>
> func main(){
> if err:=MustNotPanic();err==nil{
> fmt.Println("Failed to catch panic")
> return
> }
> fmt.Println("success")
> }
>
> Thanks.
>
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