mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
45 lines
1.5 KiB
Swift
45 lines
1.5 KiB
Swift
|
|
public protocol Observable {}
|
|
|
|
public protocol Observer<Subject> {
|
|
associatedtype Subject: Observable
|
|
}
|
|
|
|
public struct ObservationRegistrar<Subject: Observable> {
|
|
public init() {}
|
|
|
|
public func addObserver(_ observer: some Observer<Subject>) {}
|
|
|
|
public func removeObserver(_ observer: some Observer<Subject>) {}
|
|
|
|
public func beginAccess<Value>(_ keyPath: KeyPath<Subject, Value>) {}
|
|
|
|
public func beginAccess() {}
|
|
|
|
public func endAccess() {}
|
|
|
|
public func register<Value>(observable: Subject, willSet: KeyPath<Subject, Value>, to: Value) {}
|
|
|
|
public func register<Value>(observable: Subject, didSet: KeyPath<Subject, Value>) {}
|
|
}
|
|
|
|
@attached(
|
|
member,
|
|
names: named(_registrar), named(addObserver), named(removeObserver), named(withTransaction), named(Storage), named(_storage)
|
|
)
|
|
@attached(memberAttribute)
|
|
@attached(extension, conformances: Observable)
|
|
public macro Observable() = #externalMacro(module: "MacroDefinition", type: "ObservableMacro")
|
|
|
|
@attached(accessor)
|
|
public macro ObservableProperty() = #externalMacro(module: "MacroDefinition", type: "ObservablePropertyMacro")
|
|
|
|
@attached(peer, names: overloaded)
|
|
public macro addCompletionHandler() = #externalMacro(module: "MacroDefinition", type: "AddCompletionHandler")
|
|
|
|
@attached(peer, names: suffixed(Builder))
|
|
public macro AddClassReferencingSelf() = #externalMacro(module: "MacroDefinition", type: "AddClassReferencingSelfMacro")
|
|
|
|
@attached(peer, names: named(value))
|
|
public macro declareVarValuePeer() = #externalMacro(module: "MacroDefinition", type: "VarValueMacro")
|