rep_vector.hpp

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#ifndef STAN_MATH_REV_FUN_REP_VECTOR_HPP
#define STAN_MATH_REV_FUN_REP_VECTOR_HPP
 
#include <stan/math/prim/fun/Eigen.hpp>
#include <stan/math/rev/core.hpp>
#include <stan/math/rev/meta.hpp>
#include <stan/math/prim/err.hpp>
#include <stan/math/prim/fun/rep_vector.hpp>
 
namespace stan {
namespace math {
 
template <typename T_ret, require_var_matrix_t<T_ret>* = nullptr,
          require_eigen_col_vector_t<value_type_t<T_ret>>* = nullptr>
inline auto rep_vector(var x, int n) {
  return make_callback_var(rep_vector(x.val(), n), [x](auto& vi) mutable {
    forward_as<var>(x).adj() += vi.adj().sum();
  });
}
 
}  // namespace math
}  // namespace stan
 
#endif