#ifndef STAN_MATH_PRIM_ARR_FUN_SORT_DESC_HPP
#define STAN_MATH_PRIM_ARR_FUN_SORT_DESC_HPP

#include <stan/math/prim/scal/err/check_not_nan.hpp>
#include <algorithm>
#include <functional>
#include <vector>

namespace stan {
  namespace math {

    /**
     * Return the specified standard vector in descending order.
     *
     * @tparam T Type of elements contained in vector.
     * @param xs Vector to order.
     * @return Vector in descending order.
     * @throw std::domain_error If any of the values are NaN.
     */
    template <typename T>
    inline std::vector<T> sort_desc(std::vector<T> xs) {
      check_not_nan("sort_asc", "container argument", xs);
      std::sort(xs.begin(), xs.end(), std::greater<T>());
      return xs;
    }

  }
}
#endif
