| /**************************************************************************** |
| ** |
| ** Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com> |
| ** Copyright (C) 2018 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU Lesser General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU Lesser |
| ** General Public License version 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #if 0 |
| #pragma qt_sync_skip_header_check |
| #pragma qt_sync_stop_processing |
| #endif |
| |
| #ifndef QCONTAINERTOOLS_IMPL_H |
| #define QCONTAINERTOOLS_IMPL_H |
| |
| #include <QtCore/qglobal.h> |
| #include <iterator> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace QtPrivate |
| { |
| template <typename Iterator> |
| using IfIsInputIterator = typename std::enable_if< |
| std::is_convertible<typename std::iterator_traits<Iterator>::iterator_category, std::input_iterator_tag>::value, |
| bool>::type; |
| |
| template <typename Iterator> |
| using IfIsForwardIterator = typename std::enable_if< |
| std::is_convertible<typename std::iterator_traits<Iterator>::iterator_category, std::forward_iterator_tag>::value, |
| bool>::type; |
| |
| template <typename Iterator> |
| using IfIsNotForwardIterator = typename std::enable_if< |
| !std::is_convertible<typename std::iterator_traits<Iterator>::iterator_category, std::forward_iterator_tag>::value, |
| bool>::type; |
| |
| template <typename Container, |
| typename InputIterator, |
| IfIsNotForwardIterator<InputIterator> = true> |
| void reserveIfForwardIterator(Container *, InputIterator, InputIterator) |
| { |
| } |
| |
| template <typename Container, |
| typename ForwardIterator, |
| IfIsForwardIterator<ForwardIterator> = true> |
| void reserveIfForwardIterator(Container *c, ForwardIterator f, ForwardIterator l) |
| { |
| c->reserve(static_cast<typename Container::size_type>(std::distance(f, l))); |
| } |
| |
| // for detecting expression validity |
| template <typename ... T> |
| using void_t = void; |
| |
| template <typename Iterator, typename = void_t<>> |
| struct AssociativeIteratorHasKeyAndValue : std::false_type |
| { |
| }; |
| |
| template <typename Iterator> |
| struct AssociativeIteratorHasKeyAndValue< |
| Iterator, |
| void_t<decltype(std::declval<Iterator &>().key()), |
| decltype(std::declval<Iterator &>().value())> |
| > |
| : std::true_type |
| { |
| }; |
| |
| template <typename Iterator, typename = void_t<>, typename = void_t<>> |
| struct AssociativeIteratorHasFirstAndSecond : std::false_type |
| { |
| }; |
| |
| template <typename Iterator> |
| struct AssociativeIteratorHasFirstAndSecond< |
| Iterator, |
| void_t<decltype(std::declval<Iterator &>()->first), |
| decltype(std::declval<Iterator &>()->second)> |
| > |
| : std::true_type |
| { |
| }; |
| |
| template <typename Iterator> |
| using IfAssociativeIteratorHasKeyAndValue = |
| typename std::enable_if<AssociativeIteratorHasKeyAndValue<Iterator>::value, bool>::type; |
| |
| template <typename Iterator> |
| using IfAssociativeIteratorHasFirstAndSecond = |
| typename std::enable_if<AssociativeIteratorHasFirstAndSecond<Iterator>::value, bool>::type; |
| |
| } // namespace QtPrivate |
| |
| QT_END_NAMESPACE |
| |
| #endif // QCONTAINERTOOLS_IMPL_H |