Could it be as simple as missing the namespace on the is_sqeuence<> call?
-----Original Message----- From: boost-bounces@lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Joel Sent: Thursday, May 05, 2005 5:46 PM To: boost@lists.boost.org Subject: [boost] [MPL] is_sequence problem
Hi,
I have a problem with this code snippet:
#include <boost/mpl/is_sequence.hpp>
int main() { using boost::mpl::int_; using boost::mpl::is_sequence; bool b = is_sequence<int_<0> >::value; }
VC7.1 complains:
C:\dev\boost\boost\mpl\aux_\begin_end_impl.hpp(35) : error C2039: 'begin' : is not a member of 'boost::mpl::int_<N>' with [ N=0 ] C:\dev\boost\boost\mpl\begin_end.hpp(35) : see reference to class template instantiation 'boost::mpl::begin_impl<Tag>::apply<Sequence>' being compiled with [ Tag=boost::mpl::begin<boost::mpl::int_<0>>::tag_, Sequence=boost::mpl::int_<0> ] C:\dev\boost\boost\mpl\is_sequence.hpp(94) : see reference to class template instantiation 'boost::mpl::begin<Sequence>' being compiled with [ Sequence=boost::mpl::int_<0> ] C:\dev\test\mpl_is_sequence.cpp(8) : see reference to class template instantiation 'boost::mpl::is_sequence<T>' being compiled with [ T=boost::mpl::int_<0> ] C:\dev\boost\boost\mpl\aux_\begin_end_impl.hpp(35) : error C2955: 'boost::mpl::begin' : use of class template requires template argument list C:\dev\boost\boost\mpl\begin_end.hpp(38) : see declaration of 'boost::mpl::begin' C:\dev\boost\boost\mpl\begin_end.hpp(35) : error C2955: 'boost::mpl::begin' : use of class template requires template argument list C:\dev\boost\boost\mpl\begin_end.hpp(38) : see declaration of 'boost::mpl::begin' C:\dev\boost\boost\mpl\is_sequence.hpp(94) : error C3203: 'begin' : class template invalid as template argument for template parameter 'T', expected a real type
Exit code: 2
Any hints? I am relying on is_sequence to return false in this case. Comeau and g++ throws up too.
Regards, -- Joel de Guzman http://www.boost-consulting.com http://spirit.sf.net
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