PairI.H

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    Copyright (C) 2017-2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
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    for more details.
 
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// * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
template<class T>
inline int Foam::Pair<T>::compare(const Pair<T>& a, const Pair<T>& b)
{
    if (a.first() == b.first() && a.second() == b.second())
    {
        return 1;
    }
    if (a.first() == b.second() && a.second() == b.first())
    {
        return -1;
    }
 
    return 0;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class T>
inline Foam::Pair<T>::Pair(const T& f, const T& s)
{
    first()  = f;
    second() = s;
}
 
 
template<class T>
inline Foam::Pair<T>::Pair(T&& f, T&& s)
{
    first()  = std::move(f);
    second() = std::move(s);
}
 
 
template<class T>
inline Foam::Pair<T>::Pair(const std::pair<T,T>& vals)
{
    first()  = vals.first;
    second() = vals.second;
}
 
 
template<class T>
inline Foam::Pair<T>::Pair(std::pair<T,T>&& vals)
{
    first()  = std::move(vals.first);
    second() = std::move(vals.second);
}
 
 
template<class T>
inline Foam::Pair<T>::Pair(const FixedList<T, 2>& list)
:
    FixedList<T, 2>(list)
{}
 
 
template<class T>
inline Foam::Pair<T>::Pair(const T& f, const T& s, const bool doSort)
{
    if (doSort && s < f)
    {
        first()  = s;
        second() = f;
    }
    else
    {
        first()  = f;
        second() = s;
    }
}
 
 
template<class T>
inline Foam::Pair<T>::Pair(const FixedList<T, 2>& list, const bool doSort)
:
    Pair<T>(list.first(), list.last(), doSort)
{}
 
 
template<class T>
inline Foam::Pair<T>::Pair(Istream& is)
:
    FixedList<T, 2>(is)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class T>
inline const T& Foam::Pair<T>::second() const noexcept
{
    return last();
}
 
 
template<class T>
inline T& Foam::Pair<T>::second() noexcept
{
    return last();
}
 
 
template<class T>
inline const T& Foam::Pair<T>::other(const T& a) const
{
    if (first() == second())
    {
        FatalErrorInFunction
            << "Call to other only valid for Pair with differing elements:"
            << *this << abort(FatalError);
    }
    else if (a == first())
    {
        return second();
    }
    else if (a != second())
    {
        FatalErrorInFunction
            << "Pair " << *this
            << " does not contain " << a << abort(FatalError);
    }
 
    return first();
}
 
 
template<class T>
inline void Foam::Pair<T>::flip()
{
    Foam::Swap(first(), second());
}
 
 
template<class T>
inline bool Foam::Pair<T>::sorted() const
{
    return !(second() < first());
}
 
 
template<class T>
inline void Foam::Pair<T>::sort()
{
    if (second() < first())
    {
        flip();
    }
}
 
 
// ************************************************************************* //