CGAL::Dimension_tag< dim > Struct Template Reference

#include <CGAL/Dimension.h>

Definition

template<typename int dim>
struct CGAL::Dimension_tag< dim >

An object of the class Dimension_tag is an empty object which can be used for dispatching functions based on the dimension of an object, as provided by the dim parameter.

It is useful in cases where it is not more practical to pass the dimension as a template parameter directly.

Example

The following code declares two functions constructing two points at the origin, either in 2D or in 3D.

Point_2<K> get_origin(Dimension_tag<2>) { return Point_2<K>(ORIGIN); }
Point_3<K> get_origin(Dimension_tag<3>) { return Point_3<K>(ORIGIN); }
 
std::cout << get_origin(Dimension_tag<2>())) << std::endl;

See also

CGAL::Ambient_dimension<T, K>

CGAL::Feature_dimension<T, K>

CGAL::Dynamic_dimension_tag

Constants
static const int	value
	The value of the dim parameter.