eigen_tools.h

 
#ifndef __1cc1076600024d7ea537871be7fc1fc0
#define __1cc1076600024d7ea537871be7fc1fc0
 
// clang-format off
#include "lf_assert.h"  // must be included before eigen!
// clang-format on
 
#include <Eigen/Core>
#include <utility>
 
namespace lf::base {
 
namespace internal {
 
struct IsEigenMatrixTester {
  template <class SCALAR, int ROWS, int COLS, int OPTIONS, int MAX_ROWS,
            int MAX_COLS>
  static bool Test(
      const Eigen::Matrix<SCALAR, ROWS, COLS, OPTIONS, MAX_ROWS, MAX_COLS>&,
      int);
 
  template <class T>
  static float Test(const T&, long);
};
 
struct IsEigenArrayTester {
  template <class SCALAR, int ROWS, int COLS, int OPTIONS, int MAX_ROWS,
            int MAX_COLS>
  static bool Test(
      const Eigen::Array<SCALAR, ROWS, COLS, OPTIONS, MAX_ROWS, MAX_COLS>&,
      int);
 
  template <class T>
  static float Test(const T&, long);
};
 
}  // namespace internal
 
template <class T>
inline constexpr bool is_eigen_matrix = std::is_same_v<
    decltype(internal::IsEigenMatrixTester::Test(std::declval<T>(), 0)), bool>;
 
template <class T>
inline constexpr bool is_eigen_array = std::is_same_v<
    decltype(internal::IsEigenArrayTester::Test(std::declval<T>(), 0)), bool>;
 
}  // namespace lf::base
 
#endif  // __1cc1076600024d7ea537871be7fc1fc0