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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2025-2026 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::FieldListSlicer
Description
Class to provide list slices to different parts of a field
See also
Foam::FieldListSlice
\*---------------------------------------------------------------------------*/
#ifndef FieldListSlicer_H
#define FieldListSlicer_H
#include "Field.H"
#include "FieldListSlice.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
/*---------------------------------------------------------------------------*\
Class FieldListSlicer Declaration
\*---------------------------------------------------------------------------*/
template<class Type>
class FieldListSlicer
{
// Private Data
//- Slices into the field data
List<UList<Type>> fields_;
protected:
// Protected Member Functions
//- Set the field pointers
template<class Function>
static inline void set
(
const Function& function,
const label nFields,
List<UList<Type>>& fields
)
{
List<UList<Type>> tfields(nFields);
fields.transfer(tfields);
for (label fieldi = 0; fieldi < nFields; ++ fieldi)
{
fields[fieldi].shallowCopy(function(fieldi));
}
}
//- Set the field pointers
template<class Function>
inline void set
(
const Function& function,
const label nFields
)
{
set(function, nFields, fields_);
}
public:
// Constructors
//- Construct null. Set later.
inline FieldListSlicer()
{}
//- Construct from a list of fields
template<class Field>
inline FieldListSlicer(const UPtrList<Field>& fields)
{
set(fields);
}
//- Construct from a sub-range of a list of fields
template<class Field>
inline FieldListSlicer
(
const UPtrList<Field>& fields,
const label size,
const label start
)
{
set(fields, size, start);
}
// Member Functions
//- Set the field pointers
template<class Field>
inline void set(const UPtrList<Field>& fields)
{
set
(
[&](const label fieldi) -> decltype(auto)
{
return fields[fieldi];
},
fields.size()
);
}
//- Set the field pointers to a specified sub-range
template<class Field>
inline void set
(
const UPtrList<Field>& fields,
const label size,
const label start
)
{
set
(
[&](const label fieldi)
{
return SubList<Type>(fields[fieldi], size, start);
},
fields.size()
);
}
//- Return a slice for an internal element
inline FieldListSlice<Type> slice(const label elementi) const
{
return FieldListSlice<Type>(fields_, elementi);
}
};
/*---------------------------------------------------------------------------*\
Class FieldListAndSlicer Declaration
\*---------------------------------------------------------------------------*/
template<class Type>
class FieldListAndSlicer
:
public PtrList<Field<Type>>,
private FieldListSlicer<Type>
{
public:
// Constructors
//- Null Constructor
FieldListAndSlicer()
{}
//- Construct with size specified
explicit FieldListAndSlicer(const label size)
:
PtrList<Field<Type>>(size)
{}
//- Construct from arguments
template<class ... Args>
FieldListAndSlicer(Args ... args)
:
PtrList<Field<Type>>(args ...)
{
set();
}
// Member Functions
//- Inherit the pointer list's set method
using PtrList<Field<Type>>::set;
//- Set the field pointers in the slicer
inline void set()
{
FieldListSlicer<Type>::set(*this);
}
//- Return a slice for an internal element
using FieldListSlicer<Type>::slice;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************************************************************* //
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