[swift-evolution] Swift evolution proposal: introduce typeprivate access control level

[Jay Abbott]

@Xiaodi @Tino
Apologies for my assumption that every developer already knows how to use
Trello - the “lists” contain “cards” and the cards can be opened and you
can add a more detailed description, comments, checklists, images, and
other stuff. The thing you see in the list is just the title/headline of
the card. Have another go.

https://trello.com/b/fmv4uV3n/swift-access-control

@Xiaodi
Feel free to add a new list called “Bad Features” if you want, and add one
card for each anti-feature, with a title and more detail/information in the
card description about why it’s bad.

I agree that friend classes in C++ were a horrible thing, but I think that
my suggestion of “detailed access control defined by the user in named
access-groups” would solve such problems, by allowing API authors to define
“friends” however they like, and name them Friends or ToDoFixThisProperly
or ThingsThatCanAccessMyProperty or MutableSubclasses or ImmutableSubclasses
(etc.). Rien also suggested pretty much the same thing, but with the
definition directly in the access(details go here about exactly what can
access) modifier instead of being defined in a named group.
​

On Sat, 3 Dec 2016 at 21:28 Tino Heth <2th at gmx.de> wrote:

>
> An interesting format. Since it's a list, I'm not sure how to go about
> commenting on the items already there with which I disagree. IMO, the
> format doesn't lend itself to discussion.
>
> I have to agree… although I fear the major problem isn't the format, but
> rather the spirit: I guess tools would help, but they do nothing without
> commitment for collaboration.
>
> But it is definitely worth a try. Imho the board is at least a small
> improvement over email when it's about collecting thoughts, so thank you,
> Jay (and let's hope for the best)
>
> - Tino
>
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