[swift-evolution] classprivate protection level?

Mike Kluev mike.kluev at gmail.com
Mon Oct 30 20:30:14 CDT 2017

On 31 October 2017 at 00:36, Noah Desch <deschnl at icloud.com> wrote:

> > On Oct 30, 2017, at 6:38 PM, Adam Kemp via swift-evolution <
> swift-evolution at swift.org> wrote:
> >
> >
> >
> >> On Oct 30, 2017, at 2:23 PM, Mike Kluev <mike.kluev at gmail.com> wrote:
> >>
> >> On 30 October 2017 at 19:49, Adam Kemp <adam_kemp at apple.com> wrote:
> >>
> >> How do you know there’s not an extension in this file without looking?
> If you don’t know then you have to check. That puts it in the same bucket
> as internal or public. The set of files you have to search through for
> usages is the same.
> >>
> >>
> >> I'd just search for "extension SomeClass", Xcode search result window
> will list all files that have it.
> >> or I will list all the users of "foo" if that's the one I am changing.
> >
> > When you do that search, which files do you include in the search?
> That’s the key.
> If I’m concerned with how much work I’ll have to do, no that’s not the
> key. The key is how many files do I have to read myself (only those
> containing a subclass or extension of my base class). You seem to be
> conflating a near instantaneous search in an IDE with manually evaluating a
> change’s impact to other source files in the module. “Classprivate" makes
> significantly fewer files that I have to manually review compared to
> “internal”.

exactly. significantly fewer files or fragments of files - significantly
fewer entries in the search results in other words.

when in a pub:

public / internal:
  - may i have a pint of lager please? - sure, here you are

classprivate / protected:
  - may i have a pint of ale please?
      - sure. are you a member of our club? we serve ale to members only
  - errr. no. can i become a member?
      - yes, it is free. just take a seat over there and fill this form
first, once done i will bring you your ale.
  - errr, thanks. may i have lager instead please?

  - may i have a pint of potter please?
      - sure. are you a member of our club?
  - yes, i just filed the form, here it is.
       - are you aware that we serve potter only in that "core members
only" private room?
  - errr, no, how do i get there?
      - ah, no sir, it is impossible. you would know if you can go there.
it is by invitation only system.
  - damn!! lager!

i am dead sure they will serve much less ale than lager, don't you.

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