namedDictionary.H

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-------------------------------------------------------------------------------
    Copyright (C) 2020 OpenFOAM Foundation
    Copyright (C) 2021 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
    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::namedDictionary
 
Description
    A tuple of keyType and dictionary, which can be used when reading
    named or unnamed dictionary entries or simply a name.
 
    For example,
    \verbatim
    fields
    (
        U
        T { relax  false; }
    );
    \endverbatim
 
    In can also be used in situations where an individual dictionary entry
    should be read.
    \verbatim
    actions
    (
        testing { action new; ... }   // An action with a name
        { action subset;  }           // Unnamed action
    );
    \endverbatim
    Normal dictionary reading would fail for this type of input since the
    leading 'testing' keyword would cause the entire content to be considered
    a single dictionary.
 
Note
    No distinction currently made between a missing and an empty dictionary.
 
SourceFiles
    namedDictionary.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef namedDictionary_H
#define namedDictionary_H
 
#include "dictionary.H"
#include "Tuple2.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward Declarations
class namedDictionary;
Istream& operator>>(Istream&, namedDictionary&);
Ostream& operator<<(Ostream&, const namedDictionary&);
 
/*---------------------------------------------------------------------------*\
                       Class namedDictionary Declaration
\*---------------------------------------------------------------------------*/
 
class namedDictionary
:
    public Tuple2<keyType, dictionary>
{
public:
 
    // Constructors
 
        //- Inherit constructors
        using Tuple2<keyType, dictionary>::Tuple2;
 
        //- Default construct
        namedDictionary();
 
        //- Construct from Istream
        explicit namedDictionary(Istream& is);
 
 
    //- Destructor
    ~namedDictionary() = default;
 
 
    // Member Functions
 
        //- Clear keyword and dictionary
        void clear();
 
        //- Empty if both keyword and dictionary are empty
        bool empty() const noexcept;
 
        //- Return keyword
        const keyType& keyword() const noexcept
        {
            return first();
        }
 
        //- Return non-const access to keyword
        keyType& keyword() noexcept
        {
            return first();
        }
 
        //- Read-access to the dictionay
        const dictionary& dict() const noexcept
        {
            return second();
        }
 
        //- Write access to the dictionay
        dictionary& dict() noexcept
        {
            return second();
        }
 
 
    // IOstream Operators
 
        friend Istream& operator>>(Istream&, namedDictionary&);
        friend Ostream& operator<<(Ostream&, const namedDictionary&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //