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Diffstat (limited to 'src/corelib/tools/qcontainertools_impl.h')
| -rw-r--r-- | src/corelib/tools/qcontainertools_impl.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/corelib/tools/qcontainertools_impl.h b/src/corelib/tools/qcontainertools_impl.h new file mode 100644 index 0000000000..3a0c4381f1 --- /dev/null +++ b/src/corelib/tools/qcontainertools_impl.h @@ -0,0 +1,132 @@ +/**************************************************************************** +** +** 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 |