Sure, though not all apps are designed to be localized and can serve for 
internal purposes or simply the developer can say that he's supporting English 
(or another language) only - that's entirely his decision.

Also some strings, do not get localized. For example some kinds of string-ified 
lists, when you put together name of the app + version + build, etc.


> On May 19, 2016, at 7:41 PM, David Rönnqvist <[email protected]> 
> wrote:
> 
> Forget me if I'm wrong, but wouldn't localization requirements make string 
> interpolation unsuitable for user facing strings anyway? 
> 
> (I remember localization being discussed previously, but don't recall it 
> turning into a proposal)
> 
> - David 
> 
> Sent from my iPhone
> 
>> On 19 May 2016, at 19:06, Krystof Vasa via swift-evolution 
>> <[email protected]> wrote:
>> 
>> I'm wondering which scenario this is actually wanted behavior:
>> 
>> - strings that are for user interaction? Definitely not.
>> - logs? To be honest, the logs riddled with Optional(value) are pain to 
>> read. Following example:
>> 
>> key1: Optional("Value")
>> key2: nil
>> 
>> vs
>> 
>> key1: Value
>> key2: nil
>> 
>> Which is more readable in the log?
>> 
>> I just don't see the benefit of the current behavior than perhaps in Xcode's 
>> playground where it displays the value on the right and perhaps a few minor 
>> cases - but definitely not 99% of the time.
>> 
>> This is IMHO not crippling interpolation, just asking for a non-nil values 
>> for it to be interpoled with.
>> 
>> Krystof
>> 
>> 
>>> On May 19, 2016, at 6:07 PM, Jeremy Pereira via swift-evolution 
>>> <[email protected]> wrote:
>>> 
>>> -1
>>> 
>>> This seems to me like crippling string interpolation just because sometimes 
>>> we make mistakes. 99% of the time, if I interpolate an optional, it’s 
>>> because I want it that way. I don’t want to have to put up with a warning 
>>> or write the same boilerplate 99% of the time just to flag up the 1% more 
>>> easily. Sorry.
>>> 
>>>> On 18 May 2016, at 19:50, Krystof Vasa via swift-evolution 
>>>> <[email protected]> wrote:
>>>> 
>>>> The string interpolation is one of the strong sides of Swift, but also one 
>>>> of its weaknesses. 
>>>> 
>>>> It has happened to me more than once that I've used the interpolation with 
>>>> an optional by mistake and the result is then far from the expected 
>>>> result. 
>>>> 
>>>> This happened mostly before Swift 2.0's guard expression, but has happened 
>>>> since as well.
>>>> 
>>>> The user will seldomly want to really get the output 
>>>> "Optional(something)", but is almost always expecting just "something". I 
>>>> believe this should be addressed by a warning to force the user to check 
>>>> the expression to prevent unwanted results. If you indeed want the output 
>>>> of an optional, it's almost always better to use the ?? operator and 
>>>> supply a null value placeholder, e.g. "\(myOptional ?? "<<none>>")", or 
>>>> use myOptional.debugDescription - which is a valid expression that will 
>>>> always return a non-optional value to force the current behavior.
>>>> 
>>>> Krystof
>>>> 
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>>> 
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