fetraits.hh

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// SPDX-FileCopyrightText: 2021-2024 The Ikarus Developers mueller@ibb.uni-stuttgart.de
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#pragma once
 
#include <ikarus/finiteelements/ferequirements.hh>
#include <ikarus/utils/concepts.hh>
 
namespace Ikarus {
 
template <typename BH, bool useRef = false, bool useFlat = true>
struct FETraits
{
  using BasisHandler = BH;
 
  static constexpr bool useFlatBasis = useFlat;
 
  using FlatBasis = typename BasisHandler::FlatBasis;
 
  using UntouchedBasis = typename BasisHandler::UntouchedBasis;
 
  using Basis = std::conditional_t<useFlat, FlatBasis, UntouchedBasis>;
 
  using LocalView = typename Basis::LocalView;
 
  using GridView = typename Basis::GridView;
 
  using Element = typename LocalView::Element;
 
  using Geometry = typename Element::Geometry;
 
  using GlobalIndex = typename LocalView::MultiIndex;
 
  using ctype = double;
 
  static constexpr int worlddim = Geometry::coorddimension;
 
  static constexpr int mydim = Element::mydimension;
 
  static constexpr int dimension = Element::dimension;
 
  using GlobalCoordinates = Eigen::Matrix<ctype, worlddim, 1>;
 
  using ParameterSpaceType = Eigen::Matrix<ctype, mydim, 1>;
 
  static constexpr bool useEigenRef = useRef;
 
  template <typename ScalarType = ctype>
  using VectorType =
      std::conditional_t<useEigenRef, Eigen::Ref<Eigen::VectorX<ScalarType>>, Eigen::VectorX<ScalarType>&>;
 
  template <typename ScalarType = ctype>
  using MatrixType =
      std::conditional_t<useEigenRef, Eigen::Ref<Eigen::MatrixX<ScalarType>>, Eigen::MatrixX<ScalarType>&>;
};
 
} // namespace Ikarus