Doug Gregor 0f18948bd5 [Concurrency] Allow @objc async methods. ...

Allow the declaration of @objc async methods, mapping them to a
completion-handler API in Objective-C. This covers most of the
checking and semantics within the type checker:
* Declaring @objc async methods and checking their parameter/result types
* Determining the default Objective-C selector by adding
completionHandler/WithCompletionHandler as appropriate
* Determining the type of the completion handler parameter
* Inferring @objc from protocol requirements
* Inferring @objc from an overridden method

2020-09-08 10:15:24 -07:00

4.4 KiB

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