sort.hpp

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#ifndef STAN__MATH__MATRIX__SORT_HPP
#define STAN__MATH__MATRIX__SORT_HPP

#include <stan/math/matrix/Eigen.hpp>
#include <vector>
#include <algorithm>    // std::sort
#include <functional>   // std::greater

namespace stan {
  namespace math {
   
    template <typename T>
    inline typename std::vector<T> sort_asc(std::vector<T> xs) {
      std::sort(xs.begin(), xs.end());
      return xs;
    }

    template <typename T>
    inline typename std::vector<T> sort_desc(std::vector<T> xs) {
      std::sort(xs.begin(), xs.end(), std::greater<T>());
      return xs;
    }

    template <typename T, int R, int C>
    inline typename Eigen::Matrix<T,R,C> sort_asc(Eigen::Matrix<T,R,C> xs) {
      std::sort(xs.data(), xs.data()+xs.size());
      return xs;
    }

 template <typename T, int R, int C>
    inline typename Eigen::Matrix<T,R,C> sort_desc(Eigen::Matrix<T,R,C> xs) {
      std::sort(xs.data(), xs.data()+xs.size(), std::greater<T>());
      return xs;
    }
    
  }
}
#endif