Re: [Boost-users] [uBLAS] Compilation problem with VC 7.1

(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 namespace ublas = boost::numeric::ublas; int main(int argc, char **argv) { typedef ublas::promote_traits::builtin_promote_type result_type ; std::cout << typeid( result_type ).name() <

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 #include

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::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::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

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