| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation | |
| \\/ 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 3 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, see <http://www.gnu.org/licenses/>. | |
| Class | |
| Foam::nil | |
| Description | |
| A zero-sized class without any storage. Used, for example, in HashSet. | |
| Note: | |
| A zero-sized class actually does still require at least 1 byte storage. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| // Forward declaration of classes | |
| class Istream; | |
| class Ostream; | |
| // Forward declaration of friend functions and operators | |
| class nil; | |
| Istream& operator>>(Istream&, nil&); | |
| Ostream& operator<<(Ostream&, const nil&); | |
| /*---------------------------------------------------------------------------*\ | |
| Class nil Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class nil | |
| { | |
| public: | |
| // Constructors | |
| //- Construct null | |
| nil() | |
| {} | |
| //- Construct from Istream | |
| nil(Istream&) | |
| {} | |
| // IOstream Operators | |
| friend Istream& operator>>(Istream& is, nil&) | |
| { | |
| return is; | |
| } | |
| friend Ostream& operator<<(Ostream& os, const nil&) | |
| { | |
| return os; | |
| } | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |