> On Oct 13, 2017, at 10:43 AM, Jarod Long via swift-evolution
> <[email protected]> wrote:
>
> Ahh, yeah, that does seem like a much trickier case to avoid breaking. My
> instinct says it's still possible to avoid, but maybe not without lots of
> complexity.
We already have whitespace sensitive rules to handle this. There is no
fundamental implementation difference that I see between separating the
elements of lists (which are expressions) and the elements of statements (which
can be expressions):
func foo() -> Int { … }
func statements() {
foo()
foo()
}
let list = [
foo()
foo()
]
That said, I still believe that it would be premature to "syntax optimize" this
at this point in Swift’s evolution.
-Chris
>
> Jarod
>
> On Oct 12, 2017, 16:21 -0700, Xiaodi Wu <[email protected]>, wrote:
>> On Thu, Oct 12, 2017 at 2:47 PM, Jarod Long via swift-evolution
>> <[email protected] <mailto:[email protected]>> wrote:
>> I don't really expect this sort of syntactic sugar to be popular enough to
>> make it through swift-evolution, and I don't think it's worth the
>> distraction from more important priorities at this time, but for what it's
>> worth, I've enjoyed this feature in other languages that support it. It
>> plays a small part in making code more focused by eliminating unnecessary
>> syntax.
>>
>> I could be wrong, but I'm not so sure that this would actually be source
>> breaking. Even if you have something like this:
>>
>> let points = [
>> Point(
>> x: 1.0,
>> y: 2.0
>> ),
>> Point(
>> x: 3.0,
>> y: 4.0
>> )
>> ]
>>
>> Proper implementation of this feature wouldn't suddenly interpret `Point(`
>> as its own element.
>>
>> There are those of us who respect the 80-character line and break
>> expressions across lines:
>>
>> let x = [
>> NSVeryVeryVeryLongType
>> .veryVeryVeryLongProperty +
>> NSVeryVeryVeryLongType2
>> .veryVeryVeryLongProperty2,
>> ]
>>
>> It would be a pleasant surprise if a grammar with optional commas can avoid
>> blowing up existing code; I'm quite doubtful.
>>
>>
>> On Oct 12, 2017, 12:23 -0700, Josh Parmenter via swift-evolution
>> <[email protected] <mailto:[email protected]>>, wrote:
>>>
>>>
>>> On Oct 12, 2017, at 12:17 PM, Kelvin Ma via swift-evolution
>>> <[email protected]
>>> <mailto:[email protected]><mailto:[email protected]
>>> <mailto:[email protected]>>> wrote:
>>>
>>> a semicolon is a purely syntactic delimiter, the comma on the other hand
>>> corresponds to physical elements in a collection. I think the two are more
>>> different than you suggest.
>>>
>>>
>>> I very much agree^
>>>
>>> Josh
>>>
>>>
>>>
>>> Joshua Parmenter | Engineering Lead, Apple Technologies
>>>
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