[swift-evolution] Smart KeyPaths
milseman at apple.com
Fri Mar 17 17:31:14 CDT 2017
> On Mar 17, 2017, at 3:24 PM, Brent Royal-Gordon via swift-evolution <swift-evolution at swift.org> wrote:
>> On Mar 17, 2017, at 3:17 PM, Michael LeHew via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> One thing that gets interesting with the scope-restricted visibility of KeyPaths, is what happens if an fileprivate KeyPath gets leaked out of the file? That's a scary/maybe useful thing?
> I think that, as long as code within the `fileprivate` scope is responsible for passing the KeyPath out, that's an *extremely* useful thing. It essentially lets a privileged scope delegate its access to a less-privileged scope so it can do complex, potentially read-write work on its behalf. Imagine keeping an instance variable private, but allowing a serialization framework to access it through a key path; that'd be pretty handy.
Would such KeyPaths be allowed to cross ABI boundaries? If so, then there may be both library evolution and ABI stability impact.
> Brent Royal-Gordon
> swift-evolution mailing list
> swift-evolution at swift.org
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