Putting anything that has a type in any interface makes it non nil. (*foo)(nil) has a type.
On Fri, Dec 22, 2017, 17:38 Vincent Rischmann <zecmerqu...@gmail.com> wrote: > Hello, > > while refactoring some code I encountered something strange regarding > redeclarations. > > Here is an example: https://play.golang.org/p/b7Bp2w2fWwk > Somehow after redeclaring err when calling doIt, err is apparently not > nil, yet the functions never return anything other than nil. > > If I use a new variable it obviously works correctly. If I change doIt to > return an error interface instead of *foo it works too. > > I scratched my head for a good 10 minutes to understand why something > which appears nil would fail in a `if err != nil` check, so if someone has > an explanation as to what's happening that would be great. > > Thanks. > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- -j -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
