[swift-evolution] ternary operator ?: suggestion

[David Hart]

I also tend to agree but I don't like the ordering in the Python version and would rather see the introduction of the then keyword

> On 04 Dec 2015, at 06:08, Sean Heber <sean at fifthace.com> wrote:
> 
> I agree that using ? for ternary feels.. uncomfortable in Swift. I wouldn't mind seeing Python-style or just eliminating it entirely in favor of simplicity.
> 
> l8r
> Sean
> 
>> On Dec 3, 2015, at 10:48 PM, Dan Appel <dan.appel00 at gmail.com> wrote:
>> 
>> I agree that ternary can make code unreadable, especially so with the ‘?’. I personally like the Haskel option the most, but it introduces a new keyword ‘then’, which isn’t great either. Python’s "y if x else z" is therefore, in my opinion, the best alternative.
>> 
>> Also, I found it interesting how split the Rust community was about removing the ternary operator.
>> 
>> — 
>> Dan Appel
>> 
>>> On Thu, Dec 3, 2015 at 7:58 PM J. Cheyo Jimenez <cheyo at masters3d.com> wrote:
>>> Would you consider replacing the C style ?: ternary operator to something that does not use the question mark and colon ? 
>>> 
>>> The use of "?" can be confusing when speed reading code with optionals. 
>>> 
>>> Consider this code as somebody learning swift as their first language.
>>> let result = !condition ? 1 : 2
>>> 
>>> 
>>> Some alternatives:
>>> 
>>> Haskel 
>>> if predicate then expr1 else expr2
>>> Python
>>> result = x if a > b else y
>>> The advantage of not using the question mark is that the language will be more consistency on the use of "?" to mean only optionals. 
>>> 
>>> 
>>> References:
>>> https://devforums.apple.com/message/1020139#1020139
>>> https://github.com/rust-lang/rust/issues/1698#issuecomment-3705066
>>>  _______________________________________________
>>> swift-evolution mailing list
>>> 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
> 
> _______________________________________________
> 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/20151204/0ad1824a/attachment.html>