phasePairKey.H

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    Copyright (C) 2017 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
    OpenFOAM 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 of the License, or
    (at your option) any later version.
 
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    for more details.
 
    You should have received a copy of the GNU General Public License
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Class
    Foam::phasePairKey
 
Description
 
SourceFiles
 
\*---------------------------------------------------------------------------*/
 
#ifndef phasePairKey_H
#define phasePairKey_H
 
#include "Pair.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declarations
class phasePairKey;
 
bool operator==(const phasePairKey& a, const phasePairKey& b);
bool operator!=(const phasePairKey& a, const phasePairKey& b);
 
Istream& operator>>(Istream& is, phasePairKey& key);
Ostream& operator<<(Ostream& os, const phasePairKey& key);
 
/*---------------------------------------------------------------------------*\
                         Class phasePairKey Declaration
\*---------------------------------------------------------------------------*/
 
class phasePairKey
:
    public Pair<word>
{
    // Private data
 
        //- Flag to indicate whether ordering is important
        bool ordered_;
 
 
public:
 
        //- Ordered or unordered hashing of word pair
        struct hash
        {
            //- Generate a hash from a phase pair key
            label operator()(const phasePairKey& key) const;
        };
 
 
    // Constructors
 
        //- Construct null
        phasePairKey() {} // = default
 
        //- Construct from names and optional ordering flag
        phasePairKey
        (
            const word& name1,
            const word& name2,
            const bool ordered = false
        );
 
 
    //- Destructor
    virtual ~phasePairKey() = default;
 
 
    // Access
 
        //- Return the ordered flag
        bool ordered() const;
 
 
    // Friend Operators
 
        //- Test for equality
        friend bool operator==(const phasePairKey& a, const phasePairKey& b);
 
        //- Test for inequality
        friend bool operator!=(const phasePairKey& a, const phasePairKey& b);
 
        //- Read from Istream
        friend Istream& operator>>(Istream& is, phasePairKey& key);
 
        //- Write to Ostream
        friend Ostream& operator<<(Ostream& os, const phasePairKey& key);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //