chromium/third_party/abseil-cpp/absl/container/internal/test_instance_tracker.h

// Copyright 2017 The Abseil Authors.
//
// 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
//
//      https://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.

#ifndef ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_
#define ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_

#include <cstdlib>
#include <ostream>

#include "absl/types/compare.h"

namespace absl {
ABSL_NAMESPACE_BEGIN
namespace test_internal {

// A type that counts number of occurrences of the type, the live occurrences of
// the type, as well as the number of copies, moves, swaps, and comparisons that
// have occurred on the type. This is used as a base class for the copyable,
// copyable+movable, and movable types below that are used in actual tests. Use
// InstanceTracker in tests to track the number of instances.
class BaseCountedInstance { … };

// Helper to track the BaseCountedInstance instance counters. Expects that the
// number of instances and live_instances are the same when it is constructed
// and when it is destructed.
class InstanceTracker { … };

// Copyable, not movable.
class CopyableOnlyInstance : public BaseCountedInstance { … };

// Copyable and movable.
class CopyableMovableInstance : public BaseCountedInstance { … };

// Only movable, not default-constructible.
class MovableOnlyInstance : public BaseCountedInstance { … };

}  // namespace test_internal
ABSL_NAMESPACE_END
}  // namespace absl

#endif  // ABSL_CONTAINER_INTERNAL_TEST_INSTANCE_TRACKER_H_