id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
2228,signed overflow problem in weighted_sum on VC9.0,Pavol Droba,Eric Niebler,"Hi,

I have spotted rather unexpected behaviour while using weighted_sum.

Here is the simple code:
{{{
// use namespaces
using namespace boost::accumulators;
using namespace std;

// create a int accumulator with std::size_t weight
accumulator_set<int, features<tag::weighted_sum>, std::size_t> Accum;

// Accumulate negative value with positive weight
Accum(-56, boost::accumulators::weight=3);

// Print the output
wcout << ""sum: "" << boost::accumulators::weighted_sum(Accum) << endl;
}}}

I was expecting to get result -168, however I got 4294967128.

I have traced the problem to weighted_sum_impl. 

I don't know why, but 
{{{
weighted_sum_impl<int, unsigned int, tag::sample>::weighted_sample
}}} 

is resolved to {{{unsigned int}}}. I think this is plain wrong.

",Bugs,closed,Boost 1.36.0,accumulator,Boost 1.36.0,Problem,invalid,,