torch_tensor_sum Subroutine

  subroutine torch_tensor_sum(output, tensor)
    use, intrinsic :: iso_c_binding, only : c_associated
    type(torch_tensor), intent(inout) :: output  !! Tensor holding the summed values
    type(torch_tensor), intent(in)    :: tensor  !! Tensor to sum the values of

    interface
      subroutine torch_tensor_sum_c(output_c, tensor_c) &
          bind(c, name = 'torch_tensor_sum')
        use, intrinsic :: iso_c_binding, only : c_ptr
        implicit none
        type(c_ptr), value, intent(in) :: output_c
        type(c_ptr), value, intent(in) :: tensor_c
      end subroutine torch_tensor_sum_c
    end interface

    if (.not. c_associated(output%p)) then
      write(*,*) "Error :: output tensor has not been constructed"
      stop 1
    end if
    call torch_tensor_sum_c(output%p, tensor%p)
  end subroutine torch_tensor_sum