segment.hpp

Go to the documentation of this file.

#ifndef STAN_MATH_OPENCL_PRIM_SEGMENT_HPP
#define STAN_MATH_OPENCL_PRIM_SEGMENT_HPP
#ifdef STAN_OPENCL
 
#include <stan/math/opencl/matrix_cl.hpp>
#include <stan/math/opencl/err.hpp>
#include <stan/math/opencl/prim/block.hpp>
 
namespace stan {
namespace math {
 
template <typename T_x,
          require_nonscalar_prim_or_rev_kernel_expression_t<T_x>* = nullptr>
inline auto segment(T_x&& x, size_t i, size_t n) {
  check_vector("segment (OpenCL)", "x", x);
  if (x.rows() == 1) {
    return block(std::forward<T_x>(x), 1, i, 1, n);
  } else {
    return block(std::forward<T_x>(x), i, 1, n, 1);
  }
}
}  // namespace math
}  // namespace stan
#endif
#endif