Identify stores based off state identity

Examples/CaseStudies/SwiftUICaseStudies/00-RootView.swift

@@ -40,7 +40,9 @@ struct RootView: View {
                 AlertAndConfirmationDialog()
               }
             ) { store in
-              AlertAndConfirmationDialogView(store: store)
+              UIViewControllerRepresenting {
+                AlertAndConfirmationDialogViewController(store: store)
+              }
             }
           }
           NavigationLink("Focus State") {

Examples/CaseStudies/SwiftUICaseStudies/01-GettingStarted-AlertsAndConfirmationDialogs.swift

@@ -101,6 +101,67 @@ struct AlertAndConfirmationDialog {
   }
 }
 
+import UIKit
+final class AlertAndConfirmationDialogViewController: UIViewController {
+  @UIBindable var store: StoreOf<AlertAndConfirmationDialog>
+
+  init(store: StoreOf<AlertAndConfirmationDialog>) {
+    self.store = store
+    super.init(nibName: nil, bundle: nil)
+  }
+
+  required init?(coder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  override func viewDidLoad() {
+    super.viewDidLoad()
+
+    let countLabel = UILabel()
+
+    let alertButton = UIButton(type: .system, primaryAction: UIAction { [weak self] _ in
+      self?.store.send(.alertButtonTapped)
+    })
+    alertButton.setTitle("Alert", for: .normal)
+
+    let confirmationDialogButton = UIButton(type: .system, primaryAction: UIAction { [weak self] _ in
+      self?.store.send(.confirmationDialogButtonTapped)
+    })
+    confirmationDialogButton.setTitle("Confirmation Dialog", for: .normal)
+
+    let stack = UIStackView(arrangedSubviews: [
+      countLabel,
+      alertButton,
+      confirmationDialogButton,
+    ])
+    stack.axis = .vertical
+    stack.translatesAutoresizingMaskIntoConstraints = false
+
+    view.addSubview(stack)
+
+    NSLayoutConstraint.activate([
+      stack.topAnchor.constraint(equalTo: view.topAnchor),
+      stack.bottomAnchor.constraint(equalTo: view.bottomAnchor),
+      stack.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+      stack.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+    ])
+
+    observe { [weak self] in
+      guard let self else { return }
+      countLabel.text = "Count: \(store.count)"
+    }
+
+    present(item: $store.scope(state: \.alert, action: \.alert)) { store in
+      UIAlertController(store: store)
+    }
+    present(
+      item: $store.scope(state: \.confirmationDialog, action: \.confirmationDialog)
+    ) { store in
+      UIAlertController(store: store)
+    }
+  }
+}
+
 struct AlertAndConfirmationDialogView: View {
   @Bindable var store: StoreOf<AlertAndConfirmationDialog>
 

Package.swift

@@ -21,7 +21,7 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-collections", from: "1.1.0"),
     .package(url: "https://github.com/pointfreeco/combine-schedulers", from: "1.0.2"),
     .package(url: "https://github.com/pointfreeco/swift-case-paths", from: "1.5.4"),
-    .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.2.0"),
+    .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.3.0"),
     .package(url: "https://github.com/pointfreeco/swift-custom-dump", from: "1.3.2"),
     .package(url: "https://github.com/pointfreeco/swift-dependencies", from: "1.4.0"),
     .package(url: "https://github.com/pointfreeco/swift-identified-collections", from: "1.1.0"),

Package@swift-6.0.swift

@@ -21,7 +21,7 @@ let package = Package(
     .package(url: "https://github.com/apple/swift-collections", from: "1.1.0"),
     .package(url: "https://github.com/pointfreeco/combine-schedulers", from: "1.0.2"),
     .package(url: "https://github.com/pointfreeco/swift-case-paths", from: "1.5.4"),
-    .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.2.0"),
+    .package(url: "https://github.com/pointfreeco/swift-concurrency-extras", from: "1.3.0"),
     .package(url: "https://github.com/pointfreeco/swift-custom-dump", from: "1.3.2"),
     .package(url: "https://github.com/pointfreeco/swift-dependencies", from: "1.4.0"),
     .package(url: "https://github.com/pointfreeco/swift-identified-collections", from: "1.1.0"),

Sources/ComposableArchitecture/Observation/Store+Observation.swift

@@ -36,7 +36,24 @@ extension Store: Hashable {
   }
 }
 
-extension Store: Identifiable {}
+extension Store: Identifiable {
+  public struct ID: Hashable {
+    fileprivate let objectIdentifier: ObjectIdentifier
+    fileprivate let stateIdentifier: AnyHashableSendable?
+  }
+
+  public nonisolated var id: ID {
+    ID(
+      objectIdentifier: ObjectIdentifier(self),
+      stateIdentifier: Thread.isMainThread
+        ? MainActor._assumeIsolated {
+          ((currentState as? any Identifiable)?.id as? any Hashable)
+            .map(AnyHashableSendable.init)
+        }
+        : nil
+    )
+  }
+}
 
 extension Store where State: ObservableState {
   /// Scopes the store to optional child state and actions.
@@ -454,7 +471,7 @@ extension Store where State: ObservableState {
     set {
       if newValue == nil,
         let childState = self.state[keyPath: state],
-        id == _identifiableID(childState),
+        id == nil || id == _identifiableID(childState),
         !self.core.isInvalid
       {
         self.send(action(.dismiss))