| // <bits/enable_special_members.h> -*- C++ -*- |
| |
| // Copyright (C) 2013-2015 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file bits/enable_special_members.h |
| * This is an internal header file, included by other library headers. |
| * Do not attempt to use it directly. |
| */ |
| |
| #ifndef _ENABLE_SPECIAL_MEMBERS_H |
| #define _ENABLE_SPECIAL_MEMBERS_H 1 |
| |
| #pragma GCC system_header |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| /** |
| * @brief A mixin helper to conditionally enable or disable the default |
| * constructor. |
| * @sa _Enable_special_members |
| */ |
| template<bool _Switch, typename _Tag = void> |
| struct _Enable_default_constructor { }; |
| |
| |
| /** |
| * @brief A mixin helper to conditionally enable or disable the default |
| * destructor. |
| * @sa _Enable_special_members |
| */ |
| template<bool _Switch, typename _Tag = void> |
| struct _Enable_destructor { }; |
| |
| /** |
| * @brief A mixin helper to conditionally enable or disable the copy/move |
| * special members. |
| * @sa _Enable_special_members |
| */ |
| template<bool _Copy, bool _CopyAssignment, |
| bool _Move, bool _MoveAssignment, |
| typename _Tag = void> |
| struct _Enable_copy_move { }; |
| |
| /** |
| * @brief A mixin helper to conditionally enable or disable the special |
| * members. |
| * |
| * The @c _Tag type parameter is to make mixin bases unique and thus avoid |
| * ambiguities. |
| */ |
| template<bool _Default, bool _Destructor, |
| bool _Copy, bool _CopyAssignment, |
| bool _Move, bool _MoveAssignment, |
| typename _Tag = void> |
| struct _Enable_special_members |
| : private _Enable_default_constructor<_Default, _Tag>, |
| private _Enable_destructor<_Destructor, _Tag>, |
| private _Enable_copy_move<_Copy, _CopyAssignment, |
| _Move, _MoveAssignment, |
| _Tag> |
| { }; |
| |
| // Boilerplate follows. |
| |
| template<typename _Tag> |
| struct _Enable_default_constructor<false, _Tag> |
| { constexpr _Enable_default_constructor() noexcept = delete; }; |
| |
| template<typename _Tag> |
| struct _Enable_destructor<false, _Tag> |
| { ~_Enable_destructor() noexcept = delete; }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, true, true, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, false, true, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, false, true, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, true, false, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, true, false, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, false, false, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, false, false, true, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = default; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, true, true, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, true, true, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, false, true, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, false, true, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, true, false, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, true, false, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = default; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<true, false, false, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| template<typename _Tag> |
| struct _Enable_copy_move<false, false, false, false, _Tag> |
| { |
| constexpr _Enable_copy_move() noexcept = default; |
| constexpr _Enable_copy_move(_Enable_copy_move const&) noexcept = delete; |
| constexpr _Enable_copy_move(_Enable_copy_move&&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move const&) noexcept = delete; |
| _Enable_copy_move& |
| operator=(_Enable_copy_move&&) noexcept = delete; |
| }; |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace std |
| |
| #endif // _ENABLE_SPECIAL_MEMBERS_H |
