[swift-evolution] Make non-void functions @warn_unused_result by default
Janosch Hildebrand
jnosh at jnosh.com
Fri Dec 18 16:01:47 CST 2015
I am also strongly in favor of this proposal.
There are probably enough valid use cases for a @suppress_unused_warning but personally I don't think pop() is a great example.
I think a second method à la dropFirst/Last/... that returns Void would be better at communicating intent and allows pop() to retain the warning.
- Janosch
> On 18 Dec 2015, at 21:48, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
>
> I vote +1 in favor of making warn_unused_result the default. It's simple, elegant, logical, functional, and will reduce stdlib clutter.
>
> As for replacing it? Although I'd probably be okay with suppress_unused_warning, please consider optional hey_no_worries_mate_on_unused, unused_is_mellow, or dont_harsh_my_unused. Supporting _ = pop() without further warning is icing on the cake, as it enables the behavior to be established at either the API or consuming end.
>
> -- E
>
>> On Dec 18, 2015, at 1:25 PM, Dave Abrahams via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>>
>>> On Dec 18, 2015, at 3:47 AM, Tino Heth via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>>>
>>>> _ = pop()
>>>
>>> Now that's what I'd call ugly - I vote against everything that forces me to use more underscores ;-)
>>
>> “pop()” is an example of the comparatively-rare method that one might want to annotate to avoid the warning: the side-effect is useful even if you’re dropping the result. We’re only talking about making warn_unused_result the default, not making it the only option.
>>
>> -Dave
>>
>> _______________________________________________
>> swift-evolution mailing list
>> swift-evolution at swift.org <mailto:swift-evolution at swift.org>
>> https://lists.swift.org/mailman/listinfo/swift-evolution
>
>
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20151218/4c66b86c/attachment.html>
More information about the swift-evolution
mailing list