[swift-evolution] Operators on optional values

[Craig Cruden]

There is a thread on this (if I understand correctly):

	Subject : Brainstorming: Optional sugar inferred map

> On 2016-02-16, at 10:40:48, Cao Jiannan via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hi all,
> 
> I want to discuss some problems on using operator on optional values.
> 
> Here is my code:
>> 
>> let value: Bool? = false
>> 
>> let result = !value  // the variable ‘result' is expected Optional<Bool> type,
>>                             // if value is nil, then the result should be nil
>>                             // otherwise it returns the result of NOT operator.
> 
> This cannot work with Swift 2.1.
> 
> 
>> let value: Int? = 0
>> 
>> let result = value + 1 // the variable ‘result' is expected Optional<Int> type
>>                                 // if value is nil, then the result should be nil
>>                                 // otherwise it returns the result of NOT operator.
> 
> This is also cannot work with Swift 2.1.
> 
> If the basic value operator can work with optional types, it will save multiple lines in out code.
> 
> Thanks!
> 
> Jiannan, Cao
> 
> 
> 
> 
> 
> 
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution