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Add SE-0186 to changelog. #12619

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16 changes: 16 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -22,6 +22,21 @@ CHANGELOG
Swift 4.1
---------

* [SE-0186][]

It is no longer valid to use the ownership keywords `weak` and `unowned` for property declarations in protocols. These keywords are meaningless and misleading when used in a protocol as they don't have any effect.

In Swift 3 and 4 mode the following example will produce a warning with a fix-it to remove the keyword. In Swift 5 mode and above an error will be produced.

```swift
class A {}

protocol P {
weak var weakVar: A? { get set }
unowned var unownedVar: A { get set }
}
```

* [SE-0185][]

Structs and enums that declare a conformance to `Equatable`/`Hashable` now get an automatically synthesized implementation of `==`/`hashValue`. For structs, all stored properties must be `Equatable`/`Hashable`. For enums, all enum cases with associated values must be `Equatable`/`Hashable`.
Expand Down Expand Up @@ -6754,3 +6769,4 @@ Swift 1.0
[SE-0183]: <https://github.com/apple/swift-evolution/blob/master/proposals/0183-substring-affordances.md>
[SE-0184]: <https://github.com/apple/swift-evolution/blob/master/proposals/0184-unsafe-pointers-add-missing.md>
[SE-0185]: <https://github.com/apple/swift-evolution/blob/master/proposals/0185-synthesize-equatable-hashable.md>
[SE-0186]: <https://github.com/apple/swift-evolution/blob/master/proposals/0186-remove-ownership-keyword-support-in-protocols.md>