[swift-evolution] Should we incorporate bunches of new operators / micro-syntactic sugar?

[Chris Lattner]

To answer your meta question, no, we don’t want to add lots of operators.  We are willing to add them if they are very strongly motivated, but prefer not to if there are other ways to solve the problem.

In this case it sounds like:

   x = optionalValue ?? x

Is a reasonable substitute.

-Chris

> On Dec 21, 2017, at 10:38 AM, Benoit Pereira da silva via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Stephen,
> 
> You are right the proposal #0024 is very close.
> But in fact the logic is inverted.  
> 
> When using «=? » the right item is optional.
> a =? b assigns « b »  to « a »  only if « b »  is defined.
> So if an optional is defined =? will not erase its value.
> 
> But my real questions was…
> Do you have such operators that you really use very often?
> Should we incorporate bunches of new operators / micro-syntactic sugar?
> Is swift evolution the good place to discuss such question?
> 
> I don’t want to pollute your mail boxes.
> 
> Best regards,
> 
> B
> 
>> Le 21 déc. 2017 à 19:12, Stephen Celis <stephen.celis at gmail.com> a écrit :
>> 
>> Such an operator was proposed here: https://github.com/apple/swift-evolution/blob/60a8980a66a0a1341871ec323797c5547d0e0925/proposals/0024-optional-value-setter.md
>> 
>> It was ultimately rejected: https://lists.swift.org/pipermail/swift-evolution-announce/2016-February/000043.html
>> 
>> Stephen
>> 
>>> On Dec 21, 2017, at 11:44 AM, Benoit Pereira da silva via swift-evolution <swift-evolution at swift.org> wrote:
>>> 
>>> Dear all,
>>> 
>>> That’s not ambitious but i think worth be explored.
>>> 
>>> What do you think for example of this Infix operator?
>>> « =? »  allows to express optional assignments  in a very concise way.
>>> 
>>> 
>>> // The `=? operator allows simplify optional assignements :
>>> //  `a = b ?? a` can be written : `a =? b`
>>> infix operator =?: AssignmentPrecedence
>>> 
>>> public func =?<T> ( left:inout T?, right: T? ){
>>>     left = right ?? left
>>> }
>>> 
>>> public func =?<T> ( left:inout T, right: T? ){
>>>     left = right ?? left
>>> }
>>> 
>>> 
>>> Do you have such operators that you really use very often?
>>> 
> 
> Benoit Pereira da Silva
> Ultra Mobile Developer & Movement Activist
> Développeur Ultra Mobile & Militant du mouvement
> https://pereira-da-silva.com
> 
> 
> 
> 
> 
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