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[NFC]: Update changelog to include SE-0323 #39827

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Oct 20, 2021
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[NFC]: Update changelog to include SE-0323 #39827

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16 changes: 16 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -84,6 +84,21 @@ Swift 5.5

### 2021-09-20 (Xcode 13.0)

* [SE-0323][]:

The main function is executed with `MainActor` isolation applied, so functions
and variables with `MainActor` isolation may be called and modified
synchronously from the main function. If the main function is annotated with a
global actor explicitly, it must be the main actor or an error is emitted. If
no global actor annotation is present, the main function is implicitly run on
the main actor.

The main function is executed synchronously up to the first suspension point.
Any tasks enqueued by initializers in Objective-C or C++ will run after the
main function runs to the first suspension point. At the suspension point, the
main function suspends and the tasks are executed according to the Swift
concurrency mechanisms.

* [SE-0313][]:

Parameters of actor type can be declared as `isolated`, which means that they
Expand Down Expand Up @@ -8745,6 +8760,7 @@ Swift 1.0
[SE-0315]: <https://github.com/apple/swift-evolution/blob/main/proposals/0315-placeholder-types.md>
[SE-0316]: <https://github.com/apple/swift-evolution/blob/main/proposals/0316-global-actors.md>
[SE-0324]: <https://github.com/apple/swift-evolution/blob/main/proposals/0324-c-lang-pointer-arg-conversion.md>
[SE-0323]: <https://github.com/apple/swift-evolution/blob/main/proposals/0323-async-main-semantics.md>

[SR-75]: <https://bugs.swift.org/browse/SR-75>
[SR-106]: <https://bugs.swift.org/browse/SR-106>
Expand Down