Add Flux

Examples/Flux/SwiftUI-Flux/Store.swift

@@ -0,0 +1,34 @@
+import SwiftUI
+import Combine
+
+final class Store<State, Action>: BindableObject {
+    typealias Reducer = (State, Action) -> State
+
+    let didChange = PassthroughSubject<State, Never>()
+
+    var state: State {
+        lock.lock()
+        defer { lock.unlock() }
+        return _state
+    }
+
+    private let lock = NSLock()
+    private let reducer: Reducer
+    private var _state: State
+
+    init(initial state: State, reducer: @escaping Reducer) {
+        _state = state
+        self.reducer = reducer
+    }
+
+    func dispatch(action: Action) {
+        lock.lock()
+
+        let newState = reducer(_state, action)
+        _state = newState
+
+        lock.unlock()
+
+        didChange.send(newState)
+    }
+}