If we do go with the => means pure one option for closures without a signature
would be something like this: {= $0.pureMethod() }
This keeps the closure concise and uses = to indicate purity. The fact that it
looks a little bit like assignment is interesting since a pure function always
has to have a return value.
Sent from my iPad
> On Feb 17, 2017, at 10:59 AM, Matthew Johnson via swift-evolution
> <[email protected]> wrote:
>
> How do you suggest a closure indicate its purity? Something like this?
>
> { pure in $0.property }
>
>> On Feb 17, 2017, at 10:57 AM, Florent Vilmart <[email protected]> wrote:
>>
>> We were discussing the topic yesterday with others and some suggested adding
>> a pure keyword, for improved readability, just before the function
>> declaration:
>>
>> Ex:
>>
>> pure func(a:Some) -> Else {}
>>
>>
>>
>>> On Feb 17, 2017, 11:51 AM -0500, Matthew Johnson via swift-evolution
>>> <[email protected]>, wrote:
>>>
>>>> On Feb 17, 2017, at 10:46 AM, David Sweeris via swift-evolution
>>>> <[email protected]> wrote:
>>>>
>>>>
>>>> On Feb 17, 2017, at 08:21, Adrian Zubarev via swift-evolution
>>>> <[email protected]> wrote:
>>>>
>>>>> I haven’t yet read all the feedback in this topic but I’d like to throw
>>>>> some bikeshedding of mine into the room. :)
>>>>>
>>>>> How about this?
>>>>>
>>>>> Version 1: func(pure) …
>>>>> Version 2: func label(…) ~> ReturnType
>>>> Version 2 is going to upset those who use "~>" as an operator.
>>>>
>>>> As the # of possible attributes grows, having an obvious grouping
>>>> mechanism for them, like version 1, might be worthwhile simply to help
>>>> make the list clearer. What about allowing "@(list, of, attributes)"
>>>> instead of "@list, @of, @attributes”?
>>>
>>> That would be a little bit awkward for attributes that are parameterized.
>>> And if we did do this we should allow the parens to be omitted when there
>>> is only one attribute.
>>>
>>>>
>>>> - Dave Sweeris
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>>>
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