| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / 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::Function1s::Constant | |
| Description | |
| Templated function that returns a constant value. | |
| Usage | |
| For entry \<name\> returning the value <value>: | |
| \verbatim | |
| <name> constant <value> | |
| \endverbatim | |
| SourceFiles | |
| Constant.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| namespace Function1s | |
| { | |
| /*---------------------------------------------------------------------------*\ | |
| Class Constant Declaration | |
| \*---------------------------------------------------------------------------*/ | |
| template<class Type> | |
| class Constant | |
| : | |
| public FieldFunction1<Type, Constant<Type>> | |
| { | |
| // Private Data | |
| //- Constant value | |
| Type value_; | |
| public: | |
| // Runtime type information | |
| TypeName("constant"); | |
| // Constructors | |
| //- Construct from name and value | |
| Constant(const word& name, const Type& val); | |
| //- Construct from name and dictionary | |
| Constant | |
| ( | |
| const word& name, | |
| const unitSets& units, | |
| const dictionary& dict | |
| ); | |
| //- Construct from name and Istream | |
| Constant(const word& name, const unitSets& units, Istream& is); | |
| //- Copy constructor | |
| Constant(const Constant<Type>& cnst); | |
| //- Construct and return a clone | |
| virtual tmp<Function1<Type>> clone() const | |
| { | |
| return tmp<Function1<Type>>(new Constant<Type>(*this)); | |
| } | |
| //- Destructor | |
| virtual ~Constant(); | |
| // Member Functions | |
| //- Return constant value | |
| virtual inline Type value(const scalar) const; | |
| //- Return zero | |
| virtual inline Type derivative(const scalar x) const; | |
| //- Return the integral between two scalar coordinates | |
| virtual inline Type integral(const scalar x1, const scalar x2) const; | |
| //- Is this function guaranteed to be constant? | |
| virtual inline bool constant() const; | |
| //- Write in dictionary format | |
| virtual void write(Ostream& os, const unitSets& units) const; | |
| // Member Operators | |
| //- Copy assignment | |
| void operator=(const Constant<Type>&); | |
| }; | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| } // End namespace Function1s | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |