/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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 2 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Class
    Foam::hashSetUnionEqOp

Description
    Union operation to combine hash sets
    Usage: combineReduce(myWordHashSet, unionEqOp<word>());

\*---------------------------------------------------------------------------*/

namespace Foam
{
    template<class Type>
    class hashSetUnionEqOp
    {
        public:
        void operator()(HashSet<Type>& x, const HashSet<Type>& y) const
        {
            forAllConstIter(typename HashSet<Type>, y, iter)
            {
                x.insert(iter.key());
            }
        }
    };

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} // End namespace Foam

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