CGAL 5.5.1  2D Conforming Triangulations and Meshes

#include <CGAL/Delaunay_mesh_vertex_base_2.h>
Vb.
The class Delaunay_mesh_vertex_base_2
is a model for the concept DelaunayMeshVertexBase_2
.
This class can be used directly or it can serve as a base to derive other classes with some additional attributes tuned to a specific application.
Traits  is the geometric traits class. It must be the same as the one used for the Delaunay mesh. 
Vb  is the base class from which Delaunay_mesh_vertex_base_2 derives. It must be a model of the TriangulationVertexBase_2 concept. 