How to initialize error type in if-else

Question

In the code snippet below, how do I initialize an error variable?

err := nil                // can not compile, show "use of untyped nil" if xxx {     err = funcA() } else {     err = funcB() } if err != nil {     panic(err) } 

As you can see above, err will be used in the if-else blocks. I want to use one variable to get the result, but how do I initialize err here. Thanks!

Answer 1

You can create a zero-valued error (which will be nil) by declaring the variable.

var err error if xxx {     err = funcA() } else {     err = funcB() } 

It's a common idiom, and you'll see it in plenty of code.

Answer 2

This one looks a little hacky, but is valid too:

err := *new(error)