[swift-evolution] [Review] SE-0084: Allow trailing commas in parameter lists and tuples

[Matthew Johnson]

Sent from my iPad

> On May 13, 2016, at 9:19 AM, Vladimir.S <svabox at gmail.com> wrote:
> 
>> On 13.05.2016 16:32, Matthew Johnson wrote:
>> I am, +1 on allowing new lines instead of commas.  I suggest you pursue a proposal on that.
> 
> Unfortunately I have no ability for this right now, so someone who is interested in this could take the idea and create a 'formal' proposal.
> 
>> 
>> I am also +1 on the current proposal because it exists and will be pretty useful in some cases and I can't predict how long it might be until such a new line proposal would be approved.  I also think that the choice between them should be a style choice, not one made by the language (as with semicolon) and if anyone chooses commas they should have the utility of the current proposal available to them.
> 
> Don't you feel like this proposal(SE-0084) should be extended to list of generic types at least, or even to allow trailing comma in any comma-separated list in Swift? I.e. you are saying +1, but probably the exact proposal should be improved to have your +1.

I have no opinion on that.  I don't object to it being done in the name of consistency but can't think of any actual use cases either.
> 
> Probably (if this is allowed) the author of this proposal (SE-0084) can add 'line-break separator feature' to his/her proposal and generalize the rule of trailing comma/line-breaks for any comma-separated list in Swift?

That feels like a separate proposal to me.
> 
> As I can see, the proposal SE-0084 'per se' has more negative comments than positive(even if some from @apple.com supports it) and I feel like extended proposal can have more support.
> 
>> 
>> Sent from my iPad
>> 
>>> On May 13, 2016, at 1:24 AM, Vladimir.S via swift-evolution <swift-evolution at swift.org> wrote:
>>> 
>>> IMO If we were *really* concerned about this, we should just allow line-break as separator in comma-separated lists.
>>> 
>>>> On 13.05.2016 8:01, Chris Lattner via swift-evolution wrote:
>>>> If we were really concerned about this, a narrower way to solve the same problem would be to allow a comma before the ), but *only* when there is a newline between them.  I still don’t see why we’d want to encourage this though.
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>> 
>>