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我正在尝试为 PolygonSet 重载 & 运算符，但以以下错误结束。我可以理解 boost::PolygonSet 没有设置功能，但任何人都可以为我提供解决此问题的输入。我试过 view_as 但没有成功。

编码：

  Function definition for concept    
    namespace boost { namespace polygon {
         template <>
         struct geometry_concept<boost_geom_api::PolygonSet> {
             typedef polygon_set_concept type;
         }; } }

         PolygonSet PolygonSet::operator&(const PolygonSet& right) const {
             using namespace boost::polygon::operators;
             PolygonSet ps (*this);
             ps &= right;
             return ps;
         }

 PolygonSet& PolygonSet::operator&=(const PolygonSet& right) {
     using namespace boost::polygon::operators;
     using namespace gtl;
     pgns &= right.pgns;
     return (*this); }

错误：

/polygon_set.cpp:160:19:   required from here
/u/logic/depot/boost_1_57_0/include/boost/polygon/interval_concept.hpp:168:10:

错误：'struct boost::enable_if, boost::polygon::point_data >'中没有​​名为'type'的类型</p>

编译期间的消息

/u/logic/depot/boost_1_57_0/include/boost/polygon/detail/polygon_set_view.hpp:198:5: 来自'geometry_type_1& boost::polygon::self_assignment_boolean_op(geometry_type_1&, const geometry_type_2&) [with geometry_type_1 = std::vector ; geometry_type_2 = boost_geom_api::PolygonSet; int op_type = 1]' /u/logic/depot/boost_1_57_0/include/boost/polygon/polygon_set_concept.hpp:419:90: 来自'typename boost::enable_if::type, typename boost::polygon::is_any_polygon_set_type: :type>::type, geometry_type_1>::type& boost::polygon::operators::operator&=(geometry_type_1&, const geometry_type_2&) [with geometry_type_1 = std::vector; geometry_type_2 = boost_geom_api::PolygonSet; 类型名 boost::enable_if

boost::polygon::is_mutable_polygon_set_type::type, 类型名 boost::polygon::is_any_polygon_set_type::type>::type, geometry_type_1>::type = std::vector]' /polygon_set.cpp:160:13: 需要来自这里/u/logic/depot/boost_1_57_0/include/boost/polygon/polygon_90_set_traits.hpp:57:51：错误：'boost::polygon::get_coordinate_type::traits_type {aka struct boost::多边形::polygon_set_traits}'</p>

'typename boost::enable_if::type, typename boost::polygon::is_any_polygon_set_type::type>::type, geometry_type_1>::type& boost::polygon::operators::operator&=(geometry_type_1&, const geometry_type_2&) [与 geometry_type_1 = std::vector; geometry_type_2 = std::vector; 类型名 boost::enable_if::type, 类型名 boost::polygon::is_any_polygon_set_type::type>::type, geometry_type_1>::type = std::vector]'</p>

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