#ifndef GEOMETRY_HPP
#define GEOMETRY_HPP
#include <iso646.h>
//#include <boost/geometry/geometries/point_xy.hpp>
//#include <boost/geometry/geometries/box.hpp>
// little trick to get proper compilation inside and outside the CUDA nvcc compiler
#if defined(USE_GPU)
#include <host_defines.h>
#else // not defined(USE_GPU)
#if not defined(__device__)
#define __device__
#endif
#if not defined(__host__)
#define __host__
#endif
#endif // defined(USE_GPU)
namespace doppia {
namespace geometry {
/// This namespace contains simplified versions of
/// boost::geometry::model::d2::point_xy<> and boost::geometry::model::box<>
// In order to reuse the same datastructures in the CUDA code,
// we define our simplified point and box classes, which conform to the boost::geometry API,
// but do not include lexical_cast in one of its dark corners
//typedef boost::geometry::model::d2::point_xy<coordinate_t> point_t;
//typedef boost::geometry::model::box<point_t> rectangle_t;
template<typename CoordinateType>
class point_xy
{
public:
typedef CoordinateType coordinate_t;
/// Default constructor, does not initialize anything
__host__ __device__ inline point_xy()
{}
/// Constructor with x/y values
__host__ __device__ inline point_xy(CoordinateType const& x, CoordinateType const& y)
: m_x(x), m_y(y)
{}
/// Copy constructor
__host__ __device__ inline point_xy(const point_xy &other)
: m_x(other.x()), m_y(other.y())
{}
/// Get x-value
__host__ __device__ inline CoordinateType const& x() const
{ return m_x; }
/// Get y-value
__host__ __device__ inline CoordinateType const& y() const
{ return m_y; }
/// Set x-value
__host__ __device__ inline void x(CoordinateType const& v)
{ m_x = v; }
/// Set y-value
__host__ __device__ inline void y(CoordinateType const& v)
{ m_y = v; }
bool operator==(const point_xy &other) const
{
return (m_x == other.m_x) and (m_y == other.m_y);
}
bool operator!=(const point_xy &other) const
{
return (*this == other) == false;
}
protected:
CoordinateType m_x, m_y;
};
上面代碼要使用GPU 但是編譯會報錯錯誤
error C2485: “__host__”: 無法識別的擴展特性
希望大神能提一下意見，這種錯誤可能的原因是什么
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