I agree with Axel that a function like errReturn is a bad idea, though if
Go updates/improves error handling, it's possible we'll get something like
that (some of the error handling proposals have been similar to errReturn).
However, I don't see anything wrong with a function like Richard's
errHandle(), *if it's at the top level in main*. I often have a function
like this in main.go for CLIs. The signature might be:
inFile, err := os.ReadFile("Mydata.txt")
exitOnError(err, "cannot read file")
-Ben
On Wednesday, February 8, 2023 at 11:01:53 AM UTC+13 Richard Masci wrote:
> You said: "and FTR, I'd also consider your function a bad idea, but that's
> none of my business" <- I'll be the first to say not all my ideas are good
> ones, maybe this one isn't? Thanks for your response.
>
>
> On Tue, Feb 7, 2023 at 4:45 PM Axel Wagner <axel.wa...@googlemail.com>
> wrote:
>
>> No, that is not possible. Only a `return` statement can return.
>> You *can* unwind the stack, using `panic` or `runtime.GoExit` (which is
>> what `t.Fatal` does) but it's a bad idea in general (and FTR, I'd also
>> consider your function a bad idea, but that's none of my business).
>>
>> On Tue, Feb 7, 2023 at 10:39 PM Rich <rma...@gmail.com> wrote:
>>
>>> In most of my code I create a function to handle errors. looks something
>>> like this:
>>>
>>> func errorHandle(err error, str string, ex bool) {
>>> if err != nil {
>>> fmt.Printf("error: %s -- %v\n",str, err)
>>> }
>>> if ex {
>>> os.Exit(1)
>>> }
>>> }
>>>
>>> This cleans up my code:
>>> inFile, err := os.ReadFile("Mydata.txt")
>>> errorHandle(err,"read mydata.txt",true) // The true will exit
>>>
>>> So you see that I can exit the program when there is an error, what I
>>> want to know is if it's possible to do the same thing inside a function, to
>>> where I don't exit the program but return from the function:
>>>
>>> func OpenFile( filename string) []byte {
>>> inFile,err := os.ReadFile(filename)
>>> errReturn(err, "read "+filname,true)
>>>
>>> When there is an error it would return from the OpenFile function,
>>>
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