folly/folly/observer/Observer-pre.h

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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.
 */

#pragma once

#include <folly/functional/Invoke.h>

namespace folly {
namespace observer {
template <typename T>
class Observer;
}

namespace observer_detail {

template <typename T>
struct NonSharedPtr { … };

NonSharedPtr<std::shared_ptr<T>>;

template <typename T>
struct NonObserver { … };

NonObserver<observer::Observer<T>>;

template <typename T>
struct UnwrapSharedPtr { … };

UnwrapSharedPtr<std::shared_ptr<T>>;

template <typename T>
struct UnwrapObserver { … };

UnwrapObserver<observer::Observer<T>>;

ResultOf;

ResultOfNoObserverUnwrap;

ResultOfUnwrapSharedPtr;

ResultOfUnwrapObserver;

template <typename T>
struct Unwrap { … };

Unwrap<observer::Observer<T>>;
} // namespace observer_detail
} // namespace folly