[swift-evolution] SE-0025: Scoped Access Level, next steps

[James Richard]

Hi Erica,

I use "file private" extensively for keys. We have a set of models that are loaded from a server into core data. We use a common method to load the values in, and we define the keys as a file private "keys" tuple (originally a struct with private static constants, but the tuple was simpler). This allows us to reuse the word keys throughout the module, which is short, clear, and doesn't pollute the rest of the module with key identifiers where they are not necessary.

I'm sure there are other ways to do this, but I've come to quite enjoy the file private system we have.

~James

Sent from my iPad

> On Mar 25, 2016, at 10:11 AM, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
>> On Mar 25, 2016, at 10:57 AM, Tino Heth via swift-evolution <swift-evolution at swift.org> wrote:
>> 
>> 
>>> These are special cases — both file-private and module-private is something that is fairly unusual
>> 
>> afaics this is the third time someone mentions that "file-private" is uncommon — so I think it's time someone dissents:
>> That statement is at least subjective… right now, "file-private" is one of three access levels, and I wouldn't dare to say either is more or less important than the others.
>> 
>> I never encountered situations with the current model where I missed a new "private"-level, and maybe "private" will become fairly unusual for the code I'll be writing.
>> 
>> In my existing code, the new meaning of private wouldn't break much, but the current meaning doesn't hurt me, and there are cases where "file-private" is needed.
>> 
>> None the less, I don't care much about the "ugliness" of "fileprivate" — but not because I perceive it as unusual:
>> I just expect that code completion will do the typing for me, so maybe "f" will be all I have to write (half the characters of "pr" ;-)
> 
> I cannot come up with a single use-case in my code for fileprivate and would love
> some real world examples where you'd want visibility in a single file but not across
> an entire module.
> 
> The fileprivate behavior has been a bugaboo of mine for some time, particularly in 
> playground use. 
> 
> As far as I'm concerned, the control I really want is public,  intra-modular, private, and 
> private-even-to-extensions-and-subclasses. I assume the latter is a no-go.
> 
> -- E
> 
> 
> 
> 
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