Key path cannot refer to static member '....' Error

[artemkrachulov]

Description

When I tried to leverage all new features of version 1.7, I faced an error with observing case the path for the nested state. Accessing the case path scoping store shows: Key path cannot refer to static member '....'.

Here is example implemented in both versions:

@Reducer
struct StructA {
  @ObservableState
  struct State {
    var structB: StructB
  }
  enum Action {
    case contentA(ContentAReducer.Action)
  }
}

struct StructB {
  var content: Content
  @ObservableState
  public enum Content {
    case contentA(ContentAReducer.State)
  }
}

@Reducer
struct ContentAReducer {
  @ObservableState
  struct State {
    var text: String
  }
  enum Action {}
}

struct ContentAView: View {
  var store: StoreOf<ContentAReducer>
  var body: some View {
    Text(store.text)
  }
}

struct StructAView: View {

  @Binding var store: Store<StructB.Content, StructA.Action>

  var body: some View {

    // Old version works, but soft-deprecated

    SwitchStore(self.store) { content in
      switch content {
      case .contentA:
        CaseLet(/StructB.Content.contentA, action: StructA.Action.contentA) { store in
          ContentAView(store: store)
        }
      }
    }

    // New version prints an error:
    // Key path cannot refer to static member 'contentA'

    switch store.state {
    case .contentA:
      if let store = store.scope(state: \.contentA, action: \.contentA) {
        ContentAView(store: store)
      }
    }
  }
}

Checklist

• [ ] I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• [X] If possible, I've reproduced the issue using the main branch of this package.
• [X] This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

No response

Actual behavior

No response

Steps to reproduce

No response

The Composable Architecture version information

1.10.2

Destination operating system

iOS15

Xcode version information

Version 15.2 (15C500b)

Swift Compiler version information

swift-driver version: 1.87.3 Apple Swift version 5.9.2 (swiftlang-5.9.2.2.56 clang-1500.1.0.2.5)
Target: x86_64-apple-macosx14.0