CGAL 5.4 - 2D and 3D Linear Geometry Kernel
Kernel::LessYX_2 Concept Reference

## Definition

Refines:
AdaptableFunctor (with two arguments)
CGAL::compare_yx()
returns true iff the $$y$$-coordinate of p is smaller than the $$y$$-coordinate of q or if they are the same and the $$x$$-coordinate of p is smaller than the $$x$$-coordinate of q.