66 lines
2.2 KiB
Swift
66 lines
2.2 KiB
Swift
//
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// Copyright (c) 2020 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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@propertyWrapper public struct BackingStore<Store, StoreContent> {
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public typealias InitClosure = (StoreContent) -> Store
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public typealias GetClosure = (Store) -> StoreContent
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public typealias SetClosure = (Store, StoreContent) -> Void
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private let getClosure: GetClosure
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private let setClosure: SetClosure
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private let store: Store
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public init(wrappedValue: StoreContent,
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storageInitClosure: InitClosure,
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getClosure: @escaping GetClosure,
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setClosure: @escaping SetClosure) {
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self.store = storageInitClosure(wrappedValue)
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self.getClosure = getClosure
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self.setClosure = setClosure
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}
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public init(store: Store,
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getClosure: @escaping GetClosure,
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setClosure: @escaping SetClosure) {
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self.store = store
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self.getClosure = getClosure
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self.setClosure = setClosure
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}
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public var wrappedValue: StoreContent {
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get {
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getClosure(store)
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}
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set {
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setClosure(store, newValue)
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}
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}
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public var projectedValue: Store {
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store
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}
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}
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