to_real.hh

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#ifndef CASM_symmetry_to_real
#define CASM_symmetry_to_real
 
#include "casm/container/multivector.hh"
#include "casm/external/Eigen/Core"
#include "casm/global/definitions.hh"
 
namespace CASM {
 
namespace SymRepTools_v2 {
 
template <typename T>
struct _RealType;
 
template <typename T>
using _Real = typename _RealType<T>::Type;
 
template <typename T>
struct _RealType<std::vector<T>> {
  using Type = std::vector<_Real<T>>;
};
 
template <typename Scalar, int RowsAtCompileTime, int ColsAtCompileTime>
struct _RealType<Eigen::Matrix<Scalar, RowsAtCompileTime, ColsAtCompileTime>> {
  using Type = Eigen::Matrix<double, RowsAtCompileTime, ColsAtCompileTime>;
};
 
template <typename Derived>
_Real<Derived> to_real(Eigen::MatrixBase<Derived> const &mat) {
  return mat.real().template cast<double>();
}
 
template <typename T>
_Real<std::vector<T>> to_real(std::vector<T> const &vec) {
  std::vector<_Real<T>> result;
  result.reserve(vec.size());
  for (T const &el : vec) {
    result.emplace_back(to_real(el));
  }
 
  return result;
}
 
}  // namespace SymRepTools_v2
 
}  // namespace CASM
 
#endif