calcEntry.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2011-2013 OpenFOAM Foundation
    Copyright (C) 2019 OpenCFD Ltd.
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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::functionEntries::calcEntry
 
Description
    Uses dynamic compilation to provide calculating functionality
    for entering dictionary entries.
 
    E.g.
 
    \verbatim
    a 1.0;
    b 3;
    c \#calc "$a/$b";
    \endverbatim
 
    Note the explicit trailing 0 ('1.0') to force a to be read (and written)
    as a floating point number.
 
Note
    Internally this is just a wrapper around codeStream functionality - the
    \#calc string gets used to construct a dictionary for codeStream.
 
SourceFiles
    calcEntry.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef functionEntries_calcEntry_H
#define functionEntries_calcEntry_H
 
#include "codeStream.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionEntries
{
 
/*---------------------------------------------------------------------------*\
                         Class calcEntry Declaration
\*---------------------------------------------------------------------------*/
 
class calcEntry
:
    public codeStream
{
    // Private Member Functions
 
    //- Evaluate dynamically compiled code, returning result as string
    static string evaluate(const dictionary& parentDict, Istream& is);
 
 
public:
 
    //- Execute in a primitiveEntry context
    static bool execute
    (
        const dictionary& parentDict,
        primitiveEntry& entry,
        Istream& is
    );
 
    //- Execute in a sub-dict context
    static bool execute(dictionary& parentDict, Istream& is);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionEntries
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //