id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
7680	Poor choice of difference_type for zip_iterator	matthias_berndt@…	jeffrey.hellrung	"Hi,

the following program results in an integer overflow on my system (Linux g++ 4.7.2):
{{{#!c++
#include <boost/iterator/zip_iterator.hpp>
#include <boost/iterator/counting_iterator.hpp>
#include <boost/tuple/tuple.hpp>
#include <iostream>
int main() {
  boost::counting_iterator<unsigned short> i1(0);
  boost::counting_iterator<unsigned long long> i2(0);
  auto i3 = boost::make_zip_iterator(boost::make_tuple(i1, i2));
  i3 += 3221225472u;
  std::cout << boost::get<1>(*i3) << '\n';
}
}}}
It prints 18446744072635809792, but I'd expect it to print 3221225472. boost::zip_iterator seems to use the first underlying iterator's difference_type as its own difference_type, which isn't necessarily the right choice. "	Bugs	new	To Be Determined	iterator	Boost 1.52.0	Problem