NoneFunction1.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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-------------------------------------------------------------------------------
    Copyright (C) 2021-2024 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.
 
    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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    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::Function1Types::None
 
Description
    Templated placeholder function that returns an error message if called.
 
    This is principally useful for interfaces that expect a Function1
    but where it is not necessarily used by a particular submodel.
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_Function1Types_None_H
#define Foam_Function1Types_None_H
 
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function1Types
{
 
/*---------------------------------------------------------------------------*\
                            Class None Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class None
:
    public Function1<Type>
{
    // Private Member Data
 
        //- Context (eg, dictionary name) for the function
        string context_;
 
 
public:
 
    //- Runtime type information
    TypeName("none");
 
 
    // Generated Methods
 
        //- Default copy construct
        None(const None<Type>&) = default;
 
        //- No copy assignment
        void operator=(const None<Type>&) = delete;
 
 
    // Constructors
 
        //- Construct from entry name, dictionary and optional registry
        None
        (
            const word& entryName,
            const dictionary& dict,
            const objectRegistry* obrPtr = nullptr
        );
 
        //- Return a clone
        virtual tmp<Function1<Type>> clone() const
        {
            return Function1<Type>::Clone(*this);
        }
 
 
    //- Destructor
    virtual ~None() = default;
 
 
    // Member Functions
 
        //- Value is independent of x
        virtual inline bool constant() const { return true; }
 
        //- Function cannot be evaluated
        virtual inline bool good() const { return false; }
 
        //- Placeholder: generates an error if called
        virtual Type value(const scalar x) const;
 
        //- Placeholder: generates an error if called
        virtual Type integral(const scalar x1, const scalar x2) const;
 
        //- Placeholder: generates an error if called
        virtual tmp<Field<Type>> value(const scalarField& x) const;
 
        //- Write as primitive (inline) format
        virtual void writeData(Ostream& os) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function1Types
} // End namespace Foam
 
#ifdef NoRepository
    #include "NoneFunction1.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //