[haapalm]

Hi,
I have implemented my own rank 4 tensor class (i.e. tensorRank4) , and I added these typedefs to (naively?) create volume fields:

typedef GeometricField<tensorRank4, fvPatchField, volMesh> volTensorRank4Field;
typedef dimensioned<tensorRank4> dimensionedTensorRank4;

When I try to instantiate the field using:

volTensorRank4Field a4
        (
         IOobject
         (
          "a4",
          runTime.timeName(),
          mesh,
          IOobject::NO_READ,
          IOobject::AUTO_WRITE
         ),
         mesh,
         dimensionedTensorRank4("a4", dimensionSet(0,0,0,0,0,0,0), 
             tensorRank4::zero)
        );

I get these compilation erros:

error: no match for call to ‘(const Foam::fvPatchFieldMapper) (Foam::fvPatchField<Foam::TensorRank4<double> >&, Foam::fvPatchField<Foam::TensorRank4<double> >&)’
  213 |     mapper(*this, *this);
      |     ~~~~~~^~~~~~~~~~~~~~

And

/scratch/work/haapalm3/OpenFOAM-7/src/finiteVolume/lnInclude/fvPatchField.C:213:11: note:   ‘Foam::fvPatchField<Foam::TensorRank4<double> >’ is not derived from ‘const Foam::tmp<Foam::Field<Type> >’
  213 |     mapper(*this, *this);
      |     ~~~~~~^~~~~~~~~~~~~~