CGAL users discussion list

[Sylvain Pion <>]

Your error message doesn't mention CGAL at all.
You seem to call std::sort() on an std::vector<your Point3>,
but your Point3 is not LessThanComparable (it lacks operator<).

So, to me, this is totally unrelated.  Not knowing what is in nn_test.cpp,
I can't tell more.

> I pass this into Hilbert_sort_3 as the Traits. I'm pretty sure that my
> problem is the CGAL kernel. I don't know how to give my class the model for
> a CGAL Kernel. Should I have Spatial_sorting_traits extend the Kernel I use
> for my point (which is just a simple one I wrote for my point class)?

If you only use the spatial sort functions, then when you have is OK
(modulo the missing consts on the copy-ctor and the function operators).
Just make sure "p.x() < q.x()" and such are valid expressions for your
point type.

--
Sylvain