htc_3_27.swift

let appReducer: Reducer = { state, event in
    var state = state
    switch event {
    case .newUserWasLoaded(let user):
        state.user = user
    default:
        return state
    }
    return state
}


let combinedReducer = combine(
    transform(
        localReducer: NewsState.reduce(state:event:),
        stateKeyPath: \AppState.newsState,
        toLocalEvent: \AppEvent.newsEvent
    ),
    appReducer
)
let firstMutation = combinedReducer(initialState, .newUserWasLoaded(User(id: 1)))
let secondMutation = combinedReducer(firstMutation, .newsEvents(.loadData))
print(secondMutation.user.id)
print(secondMutation.newsState!.step)
// Console output:
// 1
// loading