* Replace stdlib and test/stdlib 9999 availability.
macOS 9999 -> macOS 10.15
iOS 9999 -> iOS 13
tvOS 9999 -> tvOS 13
watchOS 9999 -> watchOS 6
* Restore the pre-10.15 version of public init?(_: NSRange, in: __shared String)
We need this to allow master to work on 10.14 systems (in particular, to allow PR testing to work correctly without disabling back-deployment tests).
Some of the tests in KVOKeyPaths.swift check problems that were not fixed
until Swift 5.1 so they are not expected to pass when running with the
5.0 libraries.
rdar://problem/50173830
This reproposes @lilyball’s fixes in https://github.com/apple/swift/pull/20103 while adding her fix to ensure observations are removed before observed objects in 32-bit testing.
Test to make sure the `String -> KeyPath` table used for the
`NSKeyValueObservingCustomization` callbacks isn't screwed up by
observing another object's property with the same name from within the
callbacks.
Test `NSSortDescriptor.keyPath` to ensure it's also not screwed up by
creating sort descriptors for the same property on different objects.
Completely mechanical changes:
- Explicit @objc in a few places
- Some imported APIs changed
- For the mix-and-match tests, just test version 4/5 instead of 3/4
Keep the _NSKeyValueObservation in the runtime name, since we need to avoid colliding with the name used in the pre-ABI-stable libraries.
rdar://problem/44914709
