[swift-evolution] [Idea] if let value!

[Daniel Höpfl]

Would it be possible to drop the "if"? I don't see why we need it.

On 2016-05-18 11:22, LM wrote:
> I am experimenting with this:
> 
> If var! anOptional {
>    anOptional   // unwrapped, shadowing
> }
> 
> if let! anOptional {
> ... // same
> }
> 
> 
> This compiler codebase is truly remarkable, so it should also works 
> with
> 
> If var! opt1 where opt1 < 27 {
> }
> 
> or
> 
> if var! opt1, opt2 {
>    // both unwrapped
> }
> 
> LM/
> 
> 
>> On May 18, 2016, at 10:21 AM, Daniel Höpfl via swift-evolution 
>> <swift-evolution at swift.org> wrote:
>> 
>> Just an idea: Why don’t we think about it similar to try?
>> 
>> var anOptional : String?
>> 
>> let? anOptional { /* use it, but cannot change it */ }
>> let! anOptional { /* use it, without checking, cannot change it */ }
>> 
>> var? anOptional { /* use it, can also change it, */ }
>> var! anOptional { /* use it, without checking, can also change it */ }
>> 
>> Is it allowed to set it to nil in the var case? Hard to say.
>> 
>>> On 17.05.16 15:43, Vladimir.S via swift-evolution wrote:
>>> It is common to shadow optional value name with unwrapped value with
>>> same name:
>>> 
>>> if let someGoodValue = someGoodValue {...}
>>> 
>>> What if we'll have a syntax to not repeat the variable name to 
>>> achieve
>>> the same target:
>>> 
>>> if let someGoodValue! {...}
>>> 
>>> What do you think?
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