eigen_compat.hpp

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// SPDX-FileCopyrightText: 2024 Pairinteraction Developers
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#pragma once
 
#include "pairinteraction/utils/eigen_assertion.hpp"
 
#include <Eigen/Core>
 
// Backport template aliases to older Eigen versions
// https://eigen.tuxfamily.org/dox/group__matrixtypedefs.html
#if !EIGEN_VERSION_AT_LEAST(3, 4, 0)
namespace Eigen {
template <typename Type>
using MatrixX = Matrix<Type, Dynamic, Dynamic>;
template <typename Type>
using VectorX = Matrix<Type, Dynamic, 1>;
template <typename Type>
using Matrix3 = Matrix<Type, 3, 3>;
template <typename Type>
using Vector3 = Matrix<Type, 3, 1>;
template <typename Type, int Size>
using Vector = Matrix<Type, Size, 1>;
} // namespace Eigen
#endif