You might be interested in the original draft proposal for errors.As: https://go.googlesource.com/proposal/+/master/design/go2draft-error-inspection.md#the-is-and-as-functions
In particular, it originally specified that errors.As would take a type-parameter. (the version of generics that was proposed concurrently with that proposal was not accepted so they had to go with the current (clunkier) interface). On Sun, Sep 19, 2021 at 5:33 AM Haddock <ffm2...@web.de> wrote: > > I like the way error handling is done in the xerror package. Things become > more concise, but remain very easy to read and understand as in plain Go > errorhandling. > > Here is the example of how to use xerror.As: > > _, err := os.Open("non-existing") > if err != nil { > var pathError *os.PathError > if xerrors.As(err, &pathError) { > fmt.Println("Failed at path:", pathError.Path) > } > } > > My idea is to make this even shorter like this: > > _, err := os.Open("non-existing") > myerrors.As(err, os.PathError) { > pathError -> fmt.Println("Failed at path:", pathError.Path) > } > > Think something like that has so far not been suggested. That's why I > thought it is justified to drop comment. > > myerrors.As would also do the check if err is nil. The code in my sample > is not valid Go code, I know. It is only pseudo code to show the idea. > > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/629e6763-36a9-4d7d-991c-fd71dd384d0en%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/629e6763-36a9-4d7d-991c-fd71dd384d0en%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CANrC0Bi2azNEa33sAk2S4vYCzQEkQJovqOUWeWBDg%3DKokvQL6w%40mail.gmail.com.