firebase-ios-sdk/Firestore/Swift/Source/SwiftHeaderWorkaround.swift

// Copyright 2023 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#if SWIFT_PACKAGE
  @_exported import FirebaseFirestoreInternalWrapper
  // This re-exports the public API from here in the FirebaseFirestore namespace.
  @_exported import FirebaseFirestoreInternalSwift
#else
  @_exported import FirebaseFirestoreInternal
#endif // SWIFT_PACKAGE

// This is a trick to force generate a `FirebaseFirestore-Swift.h`
// header that re-exports `FirebaseFirestoreInternal` for Objective-C
// clients. It is important for the below code to reference a Firestore
// symbol defined in Objective-C as that will import the symbol's
// module (`FirebaseFirestoreInternal`) in the generated header. This
// allows Objective-C clients to import Firestore's Objective-C API
// using `@import FirebaseFirestore;`. This API is not needed for Swift
// clients and is therefore unavailable in a Swift context.
@available(*, unavailable)
@objc public extension Firestore {
  static var __no_op: () -> Void { {} }
}

// Maybe needed, would have to dig deeper.
@available(*, unavailable)
@objc public extension Foo {
  static var __no_op: () -> Void { {} }
}