(cross-posting to ublas-dev) Apparantly the problem is the promote_traits. E.g. following snippet prints that the result of the promote_traits is a boost::mpl::void_. <code> #include <iostream> #include <boost/numeric/ublas/vector.hpp> namespace ublas = boost::numeric::ublas; int main(int argc, char **argv) { typedef ublas::promote_traits<short,double>::builtin_promote_type result_type ; std::cout << typeid( result_type ).name() <<std::endl ; return 0; } </code> kjfh kjnk wrote:
Hi,
This simple code creates 2 ublas vector and computes the inner_product. It does not compile with VC 7.1:
--------------------------------------------------- #include <iostream> #include <string> #include <boost/concept_check.hpp> #include <boost/numeric/ublas/matrix.hpp>
namespace ublas = boost::numeric::ublas;
int main(int argc, char **argv) { ublas::vector<unsigned short> toto(3); ublas::vector<double> tata(3); double titi = ublas::inner_prod(toto, tata);
return 0; } ---------------------------------------------------
Here is the compilation:
*************************************************** C:\Temp\ublas>cl -I"C:\Program Files\boost_1_31_0" /EHsc ublas-test.cpp Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3052 for 80x86 Copyright (C) Microsoft Corporation 1984-2002. All rights reserved.
ublas-test.cpp ublas-test.cpp(12) : error C2440: 'initializing' : cannot convert from 'boost::numeric::ublas::vector_scalar_binary_traits<E1,E2,F>::result_type' to 'double' with [ E1=boost::numeric::ublas::vector<unsigned short>, E2=boost::numeric::ublas::vector<double>,
F=boost::numeric::ublas::vector_inner_prod<unsigned short,double,boost::mpl::if_c<false,unsigned short,boost::numeric::ublas::promote_traits<unsigned short,double>::builtin_promote_type>::type> ] No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
C:\Temp\ublas> ****************************************************
It compiles well with with VC 6.0, but the result is not good... (with a proper initialisation)
Anybody has an idea ?
JD
___________________________________________________________ALL-NEW Yahoo! Messenger - sooooo many all-new ways to express yourself http://uk.messenger.yahoo.com _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users