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Merge pull request #2 from 0xLeif/develop 

0.0.2
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Zach Eriksen 2021-03-16 18:57:58 -05:00 committed by GitHub
parent a5dbeadf8d a5d7f26f30
commit 9e04c70567
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1 changed files with 14 additions and 5 deletions
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19
Sources/Observation/ObservedValue.swift
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@ -1,3 +1,4 @@
import E
import Chain import Chain
@propertyWrapper public struct Observed<T> { @propertyWrapper public struct Observed<T> {
@ -8,29 +9,37 @@ import Chain
observedValue.didChangeHandler = didChangeHandler observedValue.didChangeHandler = didChangeHandler
} }
} }
public var wrappedValue: T { public var wrappedValue: T {
didSet { didSet {
observedValue.update(value: wrappedValue) _ = observedValue.update(value: wrappedValue)
} }
} }
public init(wrappedValue: T) { public init(wrappedValue: T) {
self.wrappedValue = wrappedValue self.wrappedValue = wrappedValue
} }
} }
public class ObservedValue<T> { public class ObservedValue<T> {
private(set) var value: T? private(set) public var value: T?
public var callChain: Chain = .end
public var didChangeHandler: Chain? public var didChangeHandler: Chain?
public init(value: T? = nil) { public init(value: T? = nil) {
self.value = value self.value = value
self.callChain = .complete(
.out { [weak self] in
self?.didChangeHandler?.run(name: "ObservedValue<\(T.self)>.didChangeHandler") ?? .void
}
)
} }
public func update(value: T) { @discardableResult
public func update(value: T) -> Variable {
self.value = value self.value = value
_ = didChangeHandler?.run(name: "ObservedValue<\(T.self)>.didChangeHandler") return callChain.run(name: "ObservedValue<\(T.self)>.callChain")
} }
} }