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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 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/>.
\*---------------------------------------------------------------------------*/
#include "expressions.H"
#include "expressionDimensionSet.H"
#include "expressionDimensionedType.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
//- Type used to identify access to the underlying internal field
struct GeometricField_InternalField {};
//- Type used to identify access to the underlying boundary field
struct GeometricField_BoundaryField {};
namespace expression
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
//- A GeometricField is expressionable
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Expressionable<GeometricField<Type, GeoMesh, PrimitiveField>>
:
public std::integral_constant<signed char, 1>
{};
//- Define access to the internal field of a GeometricField
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Operate
<
GeometricField<Type, GeoMesh, PrimitiveField>,
Arguments<GeometricField_InternalField>
>
{
using type = const DimensionedField<Type, GeoMesh, PrimitiveField>&;
static type access
(
const GeometricField<Type, GeoMesh, PrimitiveField>& f,
const GeometricField_InternalField&
)
{
return f.internalField();
}
};
//- Define access to the boundary field of a GeometricField
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Operate
<
GeometricField<Type, GeoMesh, PrimitiveField>,
Arguments<Value, GeometricField_BoundaryField>
>
{
using type =
const
typename GeometricField<Type, GeoMesh, PrimitiveField>::BoundaryField&;
static type access
(
const GeometricField<Type, GeoMesh, PrimitiveField>& f,
const Value&,
const GeometricField_BoundaryField&
)
{
return f.boundaryField();
}
};
//- Define the result types for a GeometricField as the dimensioned
// equivalents of the primitive types
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Result<GeometricField<Type, GeoMesh, PrimitiveField>>
{
template<class Expression>
using primitiveType =
typename Result
<
PrimitiveField<Type>
>::template elementType
<
typename Operate
<
std::decay_t
<
typename Operate
<
std::decay_t<Expression>,
Arguments<GeometricField_InternalField>
>::type
>,
Arguments<Value, Base>
>::type
>;
template<class Expression>
using elementType = dimensioned<primitiveType<Expression>>;
template<class Expression>
using type = GeometricField<primitiveType<Expression>, GeoMesh, Field>;
};
//- Implement a reduction of GeometricField which reduces both the primitive
// and boundary fields (locally and then globally) and then combines the
// result with the name and dimensions of the expression to return a
// dimensioned type
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Reduce<GeometricField<Type, GeoMesh, PrimitiveField>>
{
// Global (parallel) reductions should be applied to the result by default
static const bool globalReduce = true;
template<class Op, class Expression>
static typename Result
<
GeometricField<Type, GeoMesh, PrimitiveField>
>::template elementType<Expression> value
(
const Expression& e,
const bool globalReduce,
const label comm
)
{
using BoundaryField =
typename GeometricField<Type, GeoMesh, PrimitiveField>::
BoundaryField;
auto x =
Op::value
(
Reduce<PrimitiveField<Type>>::template value<Op>
(
access
(
access(e, GeometricField_InternalField()),
Value(),
Base()
),
globalReduce,
comm
),
Reduce<BoundaryField>::template value<Op>
(
access
(
e,
Value(),
GeometricField_BoundaryField()
),
globalReduce,
comm
)
);
return
typename Result
<
GeometricField<Type, GeoMesh, PrimitiveField>
>::template elementType<Expression>
(
Op::name(name(e)),
access
(
access(e, GeometricField_InternalField()),
NullObjectRef<dimensionSet>()
),
x
);
}
template<class Expression>
static typename Result
<
GeometricField<Type, GeoMesh, PrimitiveField>
>::template elementType<Expression> average
(
const Expression& e,
const bool globalReduce,
const label comm
)
{
return Reduce<DimensionedField<Type, GeoMesh, PrimitiveField>>::
average
(
access(e, GeometricField_InternalField()),
globalReduce,
comm
);
}
template<class Expression, class WeightExpression>
static typename Result
<
GeometricField<Type, GeoMesh, PrimitiveField>
>::template elementType<Expression> weightedAverage
(
const Expression& e,
const WeightExpression& we,
const bool globalReduce,
const label comm
)
{
return Reduce<DimensionedField<Type, GeoMesh, PrimitiveField>>::
weightedAverage
(
access(e, GeometricField_InternalField()),
access(we, GeometricField_InternalField()),
globalReduce,
comm
);
}
};
//- The name of a GeometricField is stored in its IOobject, so use this
// rather than the default string representation of the type and pointer
template<class Type, class GeoMesh, template<class> class PrimitiveField>
struct Name
<
GeometricField<Type, GeoMesh, PrimitiveField>,
EnableIfExpressionable
<
GeometricField<Type, GeoMesh, PrimitiveField>
>
>
{
static word& append
(
word& name,
const GeometricField<Type, GeoMesh, PrimitiveField>& f
)
{
return name.append(f.name());
}
static const word& value
(
const GeometricField<Type, GeoMesh, PrimitiveField>& f
)
{
return f.name();
}
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace expression
} // End namespace Foam
// ************************************************************************* //
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