CGAL 5.1.1  2D Triangulation

#include <CGAL/Constrained_triangulation_plus_2.h>
A context enables the access to the vertices of a constraint that pass through a subconstraint.
Public Member Functions  
Constraint_id  id () const 
returns the constraint id.  
Vertices_in_constraint_iterator  vertices_begin () const 
returns the first vertex of the enclosing constraint.  
Vertices_in_constraint_iterator  vertices_end () const 
returns the pasttheend of the vertices of the enclosing constraint.  
Vertices_in_constraint_iterator  current () const 
returns the iterator vici of the enclosing constraint for which *vici and *std::next(vici) correspond to the two vertices of the subconstraint.  