Unless I'm missing something, these are equivalent:
errors.Join(err1, err2)
fmt.Errorf("%w\n%w", err1, err2)
So you can use the second form to achieve something similar to whatever
separator you want to use.
On Thursday, August 10, 2023 at 4:35:16 AM UTC+3 [email protected] wrote:
> this works fine for my purposes
>
> https://go.dev/play/p/YSoeYS09v4O
>
> Thanks,
> Joe
>
> On Wednesday, August 9, 2023 at 2:34:08 AM UTC-5 Tamás Gulácsi wrote:
>
>> Strange. AFAIK the JSON handler escapes the \n in strings.
>>
>> Joseph Lorenzini a következőt írta (2023. augusztus 8., kedd, 13:24:56
>> UTC+2):
>>
>>> Thanks that was very helpful. As for your point about slog, yes a custom
>>> handler could but I am using the library json handler.
>>>
>>> I suppose the proper way to frame my problem is that I am using the slog
>>> library handler and I do not want new lines in the message or keys.
>>>
>>> Would the go team would be open to providing knobs to control how the
>>> handler does formatting? I assumed if I tried opening a proposal like that
>>> I’d be told to write a custom handler. :)
>>>
>>> On Mon, Aug 7, 2023 at 3:56 PM Ian Lance Taylor <[email protected]>
>>> wrote:
>>>
>>>> On Mon, Aug 7, 2023 at 4:32 AM [email protected] <[email protected]>
>>>> wrote:
>>>> >
>>>> > In the errors.join proposal, the proposed api had the user specify
>>>> how they wanted the errors to be formatted together. But the actual
>>>> implementation omitted and only used new line.
>>>> >
>>>> > This is quite unfortunate if you are using slog and want to log that
>>>> error and very much need a log statement to not span multiple lines. It
>>>> also makes it much harder to read.
>>>> >
>>>> > Does anyone recall why sep was dropped?
>>>>
>>>> See the discussion at https://go.dev/issue/53435, especially
>>>> https://github.com/golang/go/issues/53435#issuecomment-1190654775 and
>>>> https://github.com/golang/go/issues/53435#issuecomment-1190845424.
>>>>
>>>> As far as the slog package it seems to me that a handler can enforce
>>>> that individual messages are on a single line. There may be a better
>>>> way to address that problem, but I don't think that errors.Join is the
>>>> right place for a fix. Any random package can generate multiline
>>>> error messages with errors.New("a\nb"), and I've seen plenty that do.
>>>> So enforcing single-line messages on errors.Join won't fix the problem
>>>> in general.
>>>>
>>>> Ian
>>>>
>>>
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