IndirectSubList.H

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    Copyright (C) 2020 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
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Class
    Foam::IndirectSubList
 
Description
    Indirect access to a sub-section of a list.
 
    In many cases, using a Foam::SubList provides a simpler and more
    efficient means of accessing a sub-list.
    There are, however, some advantages of a IndirectSubList:
    - allows adjustment of its addressing range after construct
    - can recover the original, underlying list at any time
 
SeeAlso
    Foam::SubList
 
SourceFiles
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_IndirectSubList_H
#define Foam_IndirectSubList_H
 
#include "IndirectListAddressing.H"
#include "IndirectListBase.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                       Class IndirectSubList Declaration
\*---------------------------------------------------------------------------*/
 
template<class T>
class IndirectSubList
:
    private IndirectListAddressing<labelRange>,
    public IndirectListBase<T, labelRange>
{
public:
 
    // Constructors
 
        //- Construct from UList, the entire size
        explicit IndirectSubList(const UList<T>& values)
        :
            IndirectListAddressing<labelRange>(labelRange(0, values.size())),
            IndirectListBase<T, labelRange>
            (
                values,
                IndirectListAddressing<labelRange>::addressing()
            )
        {}
 
        //- Construct from values list and range
        IndirectSubList
        (
            const UList<T>& values,
            const labelRange& addr
        )
        :
            IndirectListAddressing<labelRange>(addr),
            IndirectListBase<T, labelRange>
            (
                values,
                IndirectListAddressing<labelRange>::addressing()
            )
        {}
 
 
    // Member Functions
 
        //- The list addressing
        using IndirectListAddressing::addressing;
 
 
    // Member Operators
 
        //- Use standard assignment operations
        using IndirectListBase<T, labelRange>::operator=;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //