CGAL users discussion list

[vimarsh <>]

Hi,
I wanted to use a Plane_3 as the key value in a std::map, so i passed the
third argument to the map as:

typedef CGAL::Lazy_exact_nt<CGAL::Gmpq>                         NT;
typedef CGAL::Extended_cartesian<NT>                                 K;
typedef K::Plane_3                                                            
    
Plane3;

It does not work if i just do std::map<Plane3,int>,(so i guess it is not
derived from LessComparable), and i tried passing CGAL::Plane_lt as the
third argument, but later realised that is only for RingType while my kernel
uses a FieldType.
How can i achieve what i want with my kernel?
(I also tried replacing the RT with FT, after copying how Plane_lt is
defined, in my code, but that didn't work either )
Thanks. 



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