[swift-evolution] Tuple conversion and type composition

[David Sweeris]

Good point.

Sent from my iPhone

> On Feb 7, 2016, at 10:43, Patrick Gili <gili.patrick.r at gili-labs.com> wrote:
> 
> "|" denotes bitwise-OR. Not necessarily a great choice.
> 
> -Patrick
> 
>> On Feb 7, 2016, at 1:41 PM, David Sweeris <davesweeris at mac.com> wrote:
>> 
>> Yeah, that's better than "+" or "&". What about "|"?
>> 
>> Sent from my iPhone
>> 
>>> On Feb 7, 2016, at 08:12, Patrick Gili via swift-evolution <swift-evolution at swift.org> wrote:
>>> 
>>> What about using << to denote concatenation? Many languages use this operator to denote "append", which is essentially concatenate.
>>> 
>>> -Patrick
>>> 
>>>> On Feb 6, 2016, at 5:41 PM, Andrew Bennett via swift-evolution <swift-evolution at swift.org> wrote:
>>>> 
>>>> Thanks Tino, it would be good to come up with some alternatives for +.
>>>> 
>>>> I was initially thinking `(Int,Int) (Int,Int)` without operators. However I think this could potentially be a mistake. I like + as it's familiar with array operators.
>>>> 
>>>> As for the prevalence of tuples in the language, every function and value in Swift has a tuple in it. The associated values in an enum are a tuple. They are everywhere.
>>>> 
>>>> For some more examples have a look at the linked proposal :)
>>>> 
>>>> 
>>>> On Sun, Jan 31, 2016 at 11:28 PM, Tino Heth <2th at gmx.de> wrote:
>>>>>> I'd like a a way to concatenate tuple types together:
>>>>>> 
>>>>>> typealias ABCD = (A,B)+(C,D) // Same as (A,B,C,D)
>>>>> 
>>>>> I don't like the use of "+" for concatenation, but giving more power to tuples would be neat… you just need to find examples with convincing motivation ;-)
>>>>> Obviously, the value of tuple-operation increases with the prevalence of tuples in language and libraries, so I wouldn't be surprised if their importance rises in the future (and maybe we can think of nice ways to combine tuple-related ideas).
>>>>> 
>>>>>> Also a way to allow tuples to be converted to other tuples that are the same when flattened:
>>>>>> 
>>>>>> (a,(b,c),d) as ((a,b),(c,d))
>>>>> It would be cool if such a concept ("compiler, please check if those two types have a compatible memory-layout, and if that is the case, let me use them interchangeable when I tell you to do so) could be extended to structs — that could solve the problem of different implementations of fundamental types nicely.
>>>>> 
>>>>> That leads me to an unrelated thought:
>>>>> It seems to me there is a duality between methods and closures on one side, and structs and tuples on the other — tuples feel very much like anonymous structs (restricted by the fact that you cannot add methods like custom getters & setters). It's not related to you proposal, but I wonder if there are implications visible from this point of view...
>>>>> 
>>>>> Tino
>>>> 
>>>> _______________________________________________
>>>> 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/20160207/706c7df2/attachment.html>