Adds disfavoredOverload annotation to ~= implementation in Binding.swift

[rprince500]

When running versions of TCA >= 1.24.0 on Xcode 26.4, our team's project fails to compile with several instances of the following compiler error: Ambiguous use of operator '~='

It looks like the compiler is having trouble disambiguating between this function and the more constrained implementation declared in Binding+Observation.swift, where the only difference is the additional where Root: ObservableState constraint.

I've confirmed that adding the @_disfavoredOverload annotation to the less constrained operator gets us building again.

[stephencelis]

@rprince500 Thanks! Can you include a test or code snippet that demonstrates the issue so that we can confirm before merging?

[rprince500]

@stephencelis

Here's a screenshot of one of the errors in our project. When I create a brand new project as an MRE, the compiler doesn't seem to choke up. I guess it's able to parse things just fine up until a certain level of complexity ¯\_(ツ)_/¯

For reference, here's the super simple code snippet that utilizes the same functionality but compiles fine in a brand new project.

import ComposableArchitecture

@Reducer
struct ExampleReducer {
    @ObservableState
    struct State: Equatable {
        var didReceiveHelloWorld = false
        var searchText = ""
    }

    enum Action: BindableAction, Equatable {
        case binding(BindingAction<State>)
        case helloWorld
    }

    var body: some ReducerOf<Self> {
        BindingReducer()
        Reduce { state, action in
            switch action {
            case .binding(\.searchText):
                return searchTextUpdated(with: &state)
            case .binding:
                return .none
            case .helloWorld:
                state.didReceiveHelloWorld = true
                return .none
            }
        }
    }

    private func searchTextUpdated(with state: inout State) -> EffectOf<Self> {
        if state.searchText == "Hello World" {
            .send(.helloWorld)
        } else {
            .none
        }
    }
}

[stephencelis]

Thanks!