NamedEnum.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Copyright (C) 2011-2025 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::NamedEnum
 
Description
    Initialise the NamedEnum HashTable from the static list of names.
 
SourceFiles
    NamedEnum.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef NamedEnum_H
#define NamedEnum_H
 
#include "FixedList.H"
#include "HashTable.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class dictionary;
 
/*---------------------------------------------------------------------------*\
                          Class NamedEnum Declaration
\*---------------------------------------------------------------------------*/
 
template<class Enum, unsigned int nEnum>
class NamedEnum
:
    public FixedList<word, nEnum>
{
    // Private Member Data
 
        //- Map of name -> enumeration
        HashTable<unsigned int> table_;
 
 
public:
 
    typedef FixedList<word, nEnum> namesType;
 
    // Constructors
 
        //- Construct from list of names
        NamedEnum(const FixedList<word, nEnum>& names);
 
        //- Construct from list of names
        NamedEnum(std::initializer_list<word>);
 
        //- Disallow default bitwise copy construction
        NamedEnum(const NamedEnum&) = delete;
 
 
    // Member Functions
 
        //- Read a word from Istream and return the corresponding
        //  enumeration element
        Enum read(Istream&) const;
 
        //- Lookup the name from the dictionary if present and return the
        //  corresponding enumeration element, otherwise return the defaultValue
        Enum lookupOrDefault
        (
            const word& name,
            const dictionary& dict,
            const Enum defaultValue
        ) const;
 
        //- Select the name from the dictionary and return the
        //  corresponding enumeration element.
        //  If more than one of the options is present in the dictionary
        //  generate a FatalError
        Enum select(const dictionary& dict) const;
 
        //- Write the name representation of the enumeration to an Ostream
        void write(const Enum e, Ostream&) const;
 
 
    // Member Operators
 
        //- Return the enumeration element corresponding to the given name
        const Enum operator[](const char* name) const
        {
            return Enum(table_[name]);
        }
 
        //- Return the enumeration element corresponding to the given name
        const Enum operator[](const word& name) const
        {
            return Enum(table_[name]);
        }
 
        //- Return the name of the given enumeration element
        const word& operator[](const Enum e) const
        {
            return FixedList<word, nEnum>::operator[](unsigned(e));
        }
 
        //- Disallow default bitwise assignment
        void operator=(const NamedEnum&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "NamedEnum.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //