/****************************************************************************
**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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#ifndef QT3DS_FOUNDATION_PSBASICTEMPLATES_H
#define QT3DS_FOUNDATION_PSBASICTEMPLATES_H

#include "foundation/Qt3DS.h"

namespace qt3ds {
namespace foundation {
    template <typename A>
    struct Equal
    {
        bool operator()(const A &a, const A &b) const { return a == b; }
    };

    template <typename A>
    struct Less
    {
        bool operator()(const A &a, const A &b) const { return a < b; }
    };

    template <typename A>
    struct Greater
    {
        bool operator()(const A &a, const A &b) const { return a > b; }
    };

    template <class F, class S>
    class Pair
    {
    public:
        F first;
        S second;
        Pair()
            : first(F())
            , second(S())
        {
        }
        Pair(const F &f, const S &s)
            : first(f)
            , second(s)
        {
        }
        Pair(const Pair &p)
            : first(p.first)
            , second(p.second)
        {
        }
        // CN - fix for /.../Qt3DSBasicTemplates.h(61) : warning C4512: 'nv::foundation::Pair<F,S>' :
        // assignment operator could not be generated
        Pair &operator=(const Pair &p)
        {
            first = p.first;
            second = p.second;
            return *this;
        }
        bool operator==(const Pair &p) const { return first == p.first && second == p.second; }
    };

    template <unsigned int A>
    struct LogTwo
    {
        static const unsigned int value = LogTwo<(A >> 1)>::value + 1;
    };
    template <>
    struct LogTwo<1>
    {
        static const unsigned int value = 0;
    };

    template <typename T>
    struct UnConst
    {
        typedef T Type;
    };
    template <typename T>
    struct UnConst<const T>
    {
        typedef T Type;
    };

} // namespace foundation
} // namespace qt3ds

#endif