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[Юрий Дынников <>]

Hello,

I'm trying to use Arr_curve_data_traits_2 for managing data throughout the process of finding subcurves with compute_subcurves. Everything works if I use following: 

typedef CGAL::Quotient<CGAL::MP_Float> NT;

typedef CGAL::Cartesian<NT> Kernel;

typedef CGAL::Arr_segment_traits_2<Kernel> Traits_2;

typedef Traits_2::X_monotone_curve_2 Segment_2;

, but I want Traits_2 to be Arr_curve_data_traits_2. For that reason I do 

typedef CGAL::Arr_segment_traits_2<Kernel> SegTraits_2;

typedef CGAL::Arr_curve_data_traits_2<SegTraits_2, unsigned int> Traits_2;

, which brings me to the following compilation error:

/usr/include/CGAL/Sweep_line_2_algorithms.h:134:48: error: no type named 'Traits' in 'struct CGAL::Default_arr_traits<CGAL::_Curve_data_ex<CGAL::Arr_segment_2<CGAL::Cartesian<CGAL::Quotient<CGAL::MP_Float> > >, unsigned int> >'

typename Default_arr_traits<Curve>::Traits traits;

^

What am I doing wrong?

Sincerely yours, Yuriy.