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Created February 28, 2024 19:35
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Observable property wrapper
// YObservable
// ZKit
//
// The MIT License (MIT)
//
// Copyright (c) 2016 Electricwoods LLC, Kaz Yoshikawa.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
import Foundation
@propertyWrapper
final class Observable<Value> {
private var value: Value
private var observers: [(Value) -> Void] = []
var wrappedValue: Value {
get { value }
set {
value = newValue
for observer in observers {
observer(value)
}
}
}
var projectedValue: Observable<Value> { self }
init(wrappedValue value: Value) {
self.value = value
}
func addObserver(_ observer: @escaping (Value) -> Void) {
observers.append(observer)
}
}
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