| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2011-2026 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::zero | |
| Description | |
| A class representing the concept of 0 used to avoid unnecessary | |
| manipulations for objects that are known to be zero at compile-time. | |
| SourceFiles | |
| zeroI.H | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class zero Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| class zero | |
| { | |
| public: | |
| typedef zero value_type; | |
| // Constructors | |
| //- Construct null | |
| zero() | |
| {} | |
| // Member Operators | |
| //- Return 0 for bool | |
| inline operator bool() const | |
| { | |
| return 0; | |
| } | |
| //- Return 0 for label | |
| inline operator label() const | |
| { | |
| return 0; | |
| } | |
| //- Return 0 for float | |
| inline operator float() const | |
| { | |
| return 0; | |
| } | |
| //- Return 0 for double | |
| inline operator double() const | |
| { | |
| return 0; | |
| } | |
| //- Return 0 for double | |
| inline operator long double() const | |
| { | |
| return 0; | |
| } | |
| }; | |
| namespace expression | |
| { | |
| template<> | |
| struct Expressionable<zero> | |
| : | |
| public notExpressionable | |
| {}; | |
| } | |
| // Global zero | |
| static const zero Zero; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |