CGAL users discussion list

["Sybren A. Stüvel" <>]

Hi folks,

I've got a class Vector_3 that subclasses the CGAL Vector_3 class:

#include <CGAL/basic.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>

typedef CGAL::Exact_predicates_inexact_constructions_kernel K;

class Vector_3 : public K::Vector_3 {
   ... our own stuff ...
}

Previously this class was only used in a static library, and worked just 
fine. 
Now we're moving some libraries to dynamic ones. In Linux I built .so files 
and that works fine too, but DLL files on Windows are giving me errors.

In order to export a class so that it's visible outside the DLL, I have to 
add 
__declspec(dllexport) to it. Fine by me, but when I try to export our 
Vector_3 
I get this error. Does any of you have any experience with this? We're using 
the C++ compiler from Microsoft Visual Studio 2005.

Regards,
Sybren

cl /Fointermediate\src\libs\libmath\Quaternion.obj /c
src\libs\libmath\Quaternion.cpp /nologo /TP /Zm800 /W3
/Ideps/boost/include /Ideps/CGAL/include
/Ideps/CGAL/auxiliary/gmp/include /Od /D_DEBUG /RTCsu /EHsc /MDd /nologo
/Isrc\libs /Isrc

Quaternion.cpp deps/CGAL/include\CGAL/Vector_3.h(131) : error C2664:
'CGAL::Vector_3<R_>
CGAL::CartesianKernelFunctors::Construct_divided_vector_3<K>::operator
()(const CGAL::Vector_3<R_> &,const double &) const' : cannot convert
parameter 2 from 'const C
GAL::First_if_different<A,B>::Type' to 'const double &'
        with
        [
            R_=CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>>,
            K=CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>>
        ]
        and
        [
            A=double,
            B=double
        ]
        Reason: cannot convert from 'const
CGAL::First_if_different<A,B>::Type' to 'const double'
        with
        [
            A=double,
            B=double
        ]
        No user-defined-conversion operator available that can perform
this conversion, or the operator cannot be called

        deps/CGAL/include\CGAL/Vector_3.h(130) : while compiling class
template member function 'CGAL::Vector_3<R_> CGAL
::Vector_3<R_>::operator /(const CGAL::First_if_different<A,B>::Type &)
const'
        with
        [
            R_=CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>>,
            A=double,
            B=double
        ]
        c:\home\blage\src\libs\libmath\vector_3.h(26) : see reference to
class template instantiation 'CGAL::Vector_3<R_
>' being compiled
        with
        [
            R_=CGAL::Filtered_kernel<CGAL::Simple_cartesian<double>>
        ]

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