chromium/v8/src/base/flags.h

// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_BASE_FLAGS_H_
#define V8_BASE_FLAGS_H_

#include <cstddef>

#include "src/base/compiler-specific.h"

namespace v8 {
namespace base {

// The Flags class provides a type-safe way of storing OR-combinations of enum
// values.
//
// The traditional C++ approach for storing OR-combinations of enum values is to
// use an int or unsigned int variable. The inconvenience with this approach is
// that there's no type checking at all; any enum value can be OR'd with any
// other enum value and passed on to a function that takes an int or unsigned
// int.
template <typename EnumT, typename BitfieldT = int,
          typename BitfieldStorageT = BitfieldT>
class Flags final { … };

#define DEFINE_OPERATORS_FOR_FLAGS(Type) …

}  // namespace base
}  // namespace v8

#endif  // V8_BASE_FLAGS_H_