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template<typename Geometry, typename Type, std::enable_if_t<! traits::make< Geometry >::is_specialized, int >> Geometry make(Type const & c1, Type const & c2)
| Type | Concept | Name | Description | 
|---|---|---|---|
| Geometry | Any type fulfilling a Geometry Concept | - | Must be specified | 
| std::enable_if_t<! traits::make< Geometry >::is_specialized, int > | - | Must be specified | |
| Type const & | numerical type (int, double, ttmath, ...) to specify the coordinates | c1 | First coordinate (usually x-coordinate) | 
| Type const & | numerical type (int, double, ttmath, ...) to specify the coordinates | c2 | Second coordinate (usually y-coordinate) | 
The constructed geometry, here: a 2D point
Either
            #include <boost/geometry.hpp>
          
Or
            #include <boost/geometry/algorithms/make.hpp>
          
Shows the usage of make as a generic constructor for different point types
#include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/register/point.hpp> #include <boost/geometry/geometries/adapted/boost_tuple.hpp> #include <boost/geometry/geometries/adapted/boost_polygon/point.hpp> BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian) struct mypoint { float _x, _y; }; BOOST_GEOMETRY_REGISTER_POINT_2D(mypoint, float, cs::cartesian, _x, _y) template <typename Point> void construct_and_display() { using boost::geometry::make; using boost::geometry::get; Point p = make<Point>(1, 2); std::cout << "x=" << get<0>(p) << " y=" << get<1>(p) << " (" << typeid(Point).name() << ")" << std::endl; } int main() { construct_and_display<boost::geometry::model::d2::point_xy<double> >(); construct_and_display<boost::geometry::model::d2::point_xy<int> >(); construct_and_display<boost::tuple<double, double> >(); construct_and_display<boost::polygon::point_data<int> >(); construct_and_display<mypoint>(); return 0; }
Output (compiled using gcc):
x=1 y=2 (N5boost8geometry5model2d28point_xyIdNS0_2cs9cartesianEEE) x=1 y=2 (N5boost8geometry5model2d28point_xyIiNS0_2cs9cartesianEEE) x=1 y=2 (N5boost6tuples5tupleIddNS0_9null_typeES2_S2_S2_S2_S2_S2_S2_EE) x=1 y=2 (N5boost7polygon10point_dataIiEE) x=1 y=2 (7mypoint)