Should fix that warning:
```
c:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.24930\include\algorithm(1782): warning C4244: 'argument': conversion from '_Diff' to 'long', possible loss of data
c:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.24930\include\algorithm(1796): note: see reference to function template instantiation 'void std::_Random_shuffle_unchecked<CGAL::Point_3<Kernel_>*,_RngFn>(_RanIt,_RanIt,_RngFn &)' being compiled
with
[
Kernel_=CGAL::Simple_cartesian<float>,
_RngFn=boost::random::random_number_generator<boost::random::rand48,long>,
_RanIt=CGAL::Point_3<CGAL::Simple_cartesian<float>> *
]
c:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.24930\include\algorithm(1815): note: see reference to function template instantiation 'void std::_Random_shuffle1<_RanIt,boost::random::random_number_generator<boost::random::rand48,long>>(_RanIt,_RanIt,_RngFn &)' being compiled
with
[
_RanIt=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<CGAL::Point_3<CGAL::Simple_cartesian<float>>>>>,
_RngFn=boost::random::random_number_generator<boost::random::rand48,long>
]
C:\CGAL\test\CGAL-4.10-Ic-125\include\CGAL/spatial_sort.h(83): note: see reference to function template instantiation 'void std::random_shuffle<RandomAccessIterator,boost::random::random_number_generator<boost::random::rand48,long>&>(_RanIt,_RanIt,_RngFn)' being compiled
with
[
RandomAccessIterator=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<CGAL::Point_3<CGAL::Simple_cartesian<float>>>>>,
_RanIt=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<CGAL::Point_3<CGAL::Simple_cartesian<float>>>>>,
_RngFn=boost::random::random_number_generator<boost::random::rand48,long> &
]
C:\CGAL\test\CGAL-4.10-Ic-125\include\CGAL/spatial_sort.h(136): note: see reference to function template instantiation 'void CGAL::internal::spatial_sort<RandomAccessIterator,Policy,Kernel>(RandomAccessIterator,RandomAccessIterator,const Kernel &,Policy,CGAL::Point_3<Kernel_> *,ptrdiff_t,ptrdiff_t,double)' being compiled
with
[
RandomAccessIterator=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<CGAL::Point_3<CGAL::Simple_cartesian<float>>>>>,
Policy=CGAL::Hilbert_sort_median_policy,
Kernel=Kernel,
Kernel_=CGAL::Simple_cartesian<float>
]
C:\CGAL\test\CGAL-4.10-Ic-125\include\CGAL/spatial_sort.h(152): note: see reference to function template instantiation 'void CGAL::spatial_sort<RandomAccessIterator,CGAL::Hilbert_sort_median_policy,Kernel>(RandomAccessIterator,RandomAccessIterator,const Kernel &,Policy,ptrdiff_t,ptrdiff_t,double)' being compiled
with
[
RandomAccessIterator=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<CGAL::Point_3<CGAL::Simple_cartesian<float>>>>>,
Kernel=Kernel,
Policy=CGAL::Hilbert_sort_median_policy
]
```
https://cgal.geometryfactory.com/CGAL/testsuite/CGAL-4.10-Ic-125/AABB_tree/TestReport_afabri_x64_Cygwin-Windows10_MSVC2017-Debug-64bits.gz
from GNU/g++ STL. The feature is used only if that macro is defined:
#define CGAL_HILBERT_SORT_WITH_MEDIAN_POLICY_CROSS_PLATFORM_BEHAVIOR 1
Pretty name, is not it?
For the use of Spatial_sorting, we want an implementation of nth_element
and random_shuffle that produces the same result on all platforms, for a
given seeded random generator.
Mael Rouxel-Labbé
Andreas Fabri
Sébastien Loriot
Laurent Rineau
Jane Tournois
Pedro Machado Manhães de Castro
Philipp Möller
Laurent Rineau
Sébastien Loriot
Philipp Möller
Olivier Devillers