rep_matrix.hpp

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#ifndef STAN_MATH_PRIM_FUN_REP_MATRIX_HPP
#define STAN_MATH_PRIM_FUN_REP_MATRIX_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/err.hpp>
#include <stan/math/prim/fun/Eigen.hpp>
 
namespace stan {
namespace math {
 
template <typename Ret, typename T,
          require_eigen_matrix_dynamic_vt<is_stan_scalar, Ret>* = nullptr,
          require_stan_scalar_t<T>* = nullptr>
inline auto rep_matrix(const T& x, int m, int n) {
  check_nonnegative("rep_matrix", "rows", m);
  check_nonnegative("rep_matrix", "cols", n);
  return Ret::Constant(m, n, x);
}
 
template <typename T, require_stan_scalar_t<T>* = nullptr>
inline auto rep_matrix(const T& x, int m, int n) {
  return rep_matrix<
      Eigen::Matrix<return_type_t<T>, Eigen::Dynamic, Eigen::Dynamic>>(x, m, n);
}
 
template <typename Vec, require_eigen_vector_t<Vec>* = nullptr>
inline auto rep_matrix(const Vec& x, int n) {
  if (is_eigen_row_vector<Vec>::value) {
    check_nonnegative("rep_matrix", "rows", n);
    return x.replicate(n, 1);
  } else {
    check_nonnegative("rep_matrix", "cols", n);
    return x.replicate(1, n);
  }
}
 
}  // namespace math
}  // namespace stan
 
#endif