CGAL users discussion list

[Philipp Moeller <>]

Fisher 
<>
 writes:

> Hi,
>
> I am using some functions in Point_set_2.h for range searching. The
> compilation is fine with g++ 4.7 and 4.6 with c++0x turned on. But when I
> tried to compile my code using clang, I got this error:
>
> ... snip error messages ...
>
> The code snippet causing this problem is
>
> ypedef CGAL::Exact_predicates_inexact_constructions_kernel  K;
> typedef CGAL::Point_set_2<K>::Vertex_handle  VertexHandle;
> typedef K::Point_2  Point_2;
>
>   std::vector<VertexHandle> handles;
>   Point_2 a(rect.x, rect.y + rect.height);
>   Point_2 b(rect.x, rect.y);
>   Point_2 c(rect.x + rect.width, rect.y);
>   Point_2 d(rect.x + rect.width, rect.y + rect.height);
>   point_set_.range_search(a, b, c, d, std::back_inserter(handles));
>   std::vector<cv::Point2d> points;
>   points.reserve(handles.size());
>   for (auto it = handles.begin(); it != handles.end(); ++it)
>   {
>     auto p = (*it)->point();
>     points.push_back(cv::Point2d(p.x(), p.y()));
>   }
>
> My platform is Mac OS X 10.7 and the compiler I was using is the one shipped
> with XCode Apple clang 3.1 (LLVM 3.1 svn). My CGAL is compiled with c++11
> support.
>
> I am not quite familiar with the internal of CGAL and thus it is hard for me
> to interpret the error messages. Can anyone tell me what's going wrong here
> and how to fix it?

CGAL 4.0.x has a few issues with clang (as you found out). Nearly all
packages should work with CGAL 4.1. The beta should be available in
about a week. I can't remember if the error you posted was the only
problem in Point_set_2. If so, making the failing conversion explicit
should fix it.

HTH,
Philipp