defaultderivativetraits.hh

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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
 
// SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file AUTHORS.md
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception OR LGPL-3.0-or-later
 
#ifndef DUNE_FUNCTIONS_COMMON_DEFAULT_DERIVATIVE_TRAITS_HH
#define DUNE_FUNCTIONS_COMMON_DEFAULT_DERIVATIVE_TRAITS_HH
 
#include <type_traits>
#include <utility>
 
#include <dune/common/fvector.hh>
#include <dune/common/fmatrix.hh>
 
namespace Dune {
namespace Functions {
 
 
 
class InvalidRange
{};
 
 
template<class Signature>
struct DefaultDerivativeTraits
{
  typedef InvalidRange Range;
};
 
 
template<>
struct DefaultDerivativeTraits< double(double) >
{
  typedef double Range;
};
 
template<typename K, int n>
struct DefaultDerivativeTraits<K(FieldVector<K,n>)>
{
  typedef FieldVector<K,n> Range;
};
 
template<typename K, int n, int m>
struct DefaultDerivativeTraits<FieldVector<K,m>(FieldVector<K,n>)>
{
  typedef FieldMatrix<K,m,n> Range;
};
 
template<typename K, int n, int m>
struct DefaultDerivativeTraits<FieldMatrix<K,1,m>(FieldVector<K,n>)>
{
  typedef FieldMatrix<K,m,n> Range;
};
 
 
}} // namespace Dune::Functions
 
 
#endif // DUNE_FUNCTIONS_COMMON_DEFAULT_DERIVATIVE_TRAITS_HH