check_cholesky_factor_corr.hpp

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#ifndef STAN_MATH_PRIM_ERR_CHECK_CHOLESKY_FACTOR_CORR_HPP
#define STAN_MATH_PRIM_ERR_CHECK_CHOLESKY_FACTOR_CORR_HPP
 
#include <stan/math/prim/fun/Eigen.hpp>
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/fun/to_ref.hpp>
#include <stan/math/prim/fun/value_of_rec.hpp>
#include <stan/math/prim/err/check_positive.hpp>
#include <stan/math/prim/err/check_lower_triangular.hpp>
#include <stan/math/prim/err/check_square.hpp>
#include <stan/math/prim/err/check_unit_vector.hpp>
#include <stan/math/prim/err/make_iter_name.hpp>
 
namespace stan {
namespace math {
 
template <typename Mat, require_matrix_t<Mat>* = nullptr>
void check_cholesky_factor_corr(const char* function, const char* name,
                                const Mat& y) {
  const auto& y_ref = to_ref(value_of_rec(y));
  check_square(function, name, y_ref);
  check_lower_triangular(function, name, y_ref);
  check_positive(function, name, y_ref.diagonal());
  for (Eigen::Index i = 0; i < y_ref.rows(); ++i) {
    check_unit_vector(function, name, y_ref.row(i));
  }
}
 
template <typename StdVec, require_std_vector_t<StdVec>* = nullptr>
void check_cholesky_factor_corr(const char* function, const char* name,
                                const StdVec& y) {
  for (size_t i = 0; i < y.size(); ++i) {
    check_cholesky_factor_corr(function,
                               internal::make_iter_name(name, i).c_str(), y[i]);
  }
}
}  // namespace math
}  // namespace stan
#endif