Go处理错误的正确方法是什么

Question

This seems a bit stupid, surely theres a better way?

err = SendMessageAndWait(db, "this is a test")
if err != nil {
    fmt.Println("Error sending message", err)
    return
}
err = DoSomething(db, "this is a test")
if err != nil {
    fmt.Println("Error sending message", err)
    return
}
err = CheckSomething(db, "this is another test")
if err != nil {
    fmt.Println("Error sending message", err)
    return
}
err = SendMessageAndWait(db, "this is a third test")
if err != nil {
    fmt.Println("Error sending message", err)
    return
}
... x10 ...

Update: For the record, 5 years on from when I wrote this, I am now persuaded that this is a completely sufficient, and perhaps even better, way to handle errors clearly. Not saying its pretty though.

Answer 1

Sadly that's the way it is in Go, however in a way you can make it cleaner:

func isError(err error, pre string) error {
    if err != nil {
        log.Printf("%v: %v", pre, err)
    }
    return err
}

func isErrorBool(err error, pre string) (b bool) {
    if err != nil {
        log.Printf("%v: %v", pre, err)
        b = true
    }
    return
}

func checkSomething() error {
    return nil
}

func main() {
    if err := isError(checkSomething(), "something failed"); err != nil {
        return /* err */
    }

    //if you don't want to return the error, just check it and die.
    if isErrorBool(checkSomething(), "something else failed") { 
        return
    }
}