patchExprFieldBase.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2018 Bernhard Gschaider
    Copyright (C) 2019-2020 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.
 
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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::expressions::patchExprFieldBase
 
Description
    Base class for managing patches with expressions.
    The expected input supports values, gradients and mixed conditions
 
Usage
    \table
        Property     | Description                          | Required | Default
        valueExpr    | expression for fixed value           | no  | 0
        gradientExpr | expression for patch normal gradient | no  | 0
        fractionExpr | expression for value fraction weight | no  | 1
    \endtable
 
SourceFiles
    patchExprFieldBase.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef expressions_patchExprFieldBase_H
#define expressions_patchExprFieldBase_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "dictionary.H"
#include "exprString.H"
 
namespace Foam
{
 
// Forward Declarations
class facePointPatch;
class fvPatch;
class polyPatch;
 
namespace expressions
{
 
/*---------------------------------------------------------------------------*\
                     Class patchExprFieldBase Declaration
\*---------------------------------------------------------------------------*/
 
class patchExprFieldBase
{
protected:
 
    // Protected Data
 
        bool debug_;
        bool allowGradient_;
 
        //- Slightly dodgy concept here
        bool evalOnConstruct_;
 
        // The expressions
        expressions::exprString valueExpr_;
        expressions::exprString gradExpr_;
        expressions::exprString fracExpr_;
 
 
public:
 
    // Constructors
 
        //- Default construct
        patchExprFieldBase();
 
        //- Construct with specified gradient handling
        explicit patchExprFieldBase(bool allowGradient);
 
        //- Construct from dictionary
        explicit patchExprFieldBase
        (
            const dictionary& dict,
            bool allowGradient = false,
            bool isPointVal = false
        );
 
        //- Copy constructor
        patchExprFieldBase(const patchExprFieldBase& rhs);
 
 
    // Member Functions
 
        //- Write
        void write(Ostream& os) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace expressions
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //