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Yes, it's a fallthrough case which makes it much more obvious what is 
happening. Don't forget to specify [[falthrough]]

On Fri, 26 May 2023, ccaffy wrote:

> @ccaffy commented on this pull request.
>
>
>
>> @@ -1391,6 +1391,10 @@ static int mapError(int rc)
>            case ETIMEDOUT:     return kXR_ReqTimedOut;
>            case EBADF:         return kXR_FileNotOpen;
>            case ECANCELED:     return kXR_Cancelled;
> +           // In the case one tries to delete a non-empty directory
> +           // we have decided that until the next major release
> +           // the kXR_ItExists flag will be returned
> +           case ENOTEMPTY:     return kXR_ItExists;
>
> I do not understand :thinking: Is it a fallthrough case? I just return kXR_ItExists when the errno code is ENOTEMPTY. Each switch case has a return value, so there's no need for a `[[fallthrough]];` attribute, isn't it?
>
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