[swift-evolution] Shorthand unwrap proposal

[L. Mihalkovic]

Regards
(From mobile)

> On Jun 23, 2016, at 8:51 PM, Charlie Monroe via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
>> On Jun 23, 2016, at 8:45 PM, Tim Vermeulen via swift-evolution <swift-evolution at swift.org> wrote:
>> 
>> I would love to be able to do something like
>> 
>> doSomething(with: myOptional?)
> 
> This actually looks good to me, though if I were a newcomer to the language, it would be really cryptic.
> 
> In case the function returned any value, it could become an optional, just like with try?...
> 
> I still, however, prefer the original proposal of if let myOptional! { doSomething(myOptional) }...
> 

    func doSomething<T> (with: t:T?, h: T -> ()) {
            if let t = self as? T { h(t) }
    }
extension Optional {
    func unwrap<T> (_ h: T -> ()) {
            if let t = self as? T { h(t) }
    }
}

Var s2:Sting? 
s2.unwrap { (str:String) in
    print(":)") 
}
doSomething(with:s2) { //same as above}

Nothing happens in both cases

>> 
>> which would be equivalent to
>> 
>> if let myValue = myOptional {
>>   doSomething(with: myValue)
>> }
>> 
>> But it’s been discussed here before, and I don’t think people were very enthusiastic about it.
>> 
>>> I was wondering if people would be open to adding an unwrap method to the Optional type,I already have a method like this which shortens code for me.
>>> 
>>> So this:
>>> 
>>> let myReallyLongOptionalName: String? = "Hey"
>>> 
>>> if let string = myReallyLongOptionalName {
>>> doSomethingWith(string)
>>> }
>>> 
>>> Could become"
>>> 
>>> let myReallyLongOptionalName: String? = "Hey"
>>> 
>>> myReallyLongOptionalName.unwrap {
>>> doSomethingWith($0)
>>> }
>>> 
>>> The block would only be fired if myReallyLongOptionalName has a value.
>>> 
>>> 
>>> ___________________________________
>>> 
>>> 
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>>> 
>>> 
>>> james at supmenow.com(mailto:james at supmenow.com)⎥supmenow.com(http://supmenow.com)
>>> 
>>> 
>>> Sup
>>> 
>>> 
>>> Runway East
>>> 
>>> 
>>> 10 Finsbury Square
>>> 
>>> 
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>>> 
>>> 
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> 
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