CGAL 4.12.1 - 2D and 3D Linear Geometry Kernel
CGAL::compare_yx()
CGAL::compare_xy()
CGAL::compare_xyz()
CGAL::compare_x()
CGAL::compare_x_at_y()
CGAL::compare_y()
CGAL::compare_y_at_x()
CGAL::compare_z()
Compares the Cartesian coordinates of points p and q lexicographically in $$yx$$ order: first $$y$$-coordinates are compared, if they are equal, $$x$$-coordinates are compared.