On Tue, Feb 3, 2009 at 9:45 AM, Igor R <boost.lists@gmail.com> wrote:
The following code crashes in for_each when trying to output the 1st pair. What's wrong with it?
Thanks!
namespace bl = boost::lambda; std::map<std::string, std::string> temp; temp["a"] = "1"; temp["b"] = "2"; const std::map<std::string, std::string> attrs(temp); typedef std::pair<std::string, std::string> string_pair; std::stringstream stream; std::for_each(attrs.begin(), attrs.end(), stream << bl::bind(&string_pair::first, bl::_1) << bl::bind(&string_pair::second, bl::_1));
Try changing the string_pair typedef to: std::pair<std::string const, std::string> string_pair; Not 100% sure *why* this makes it run rather than crash (with VC++ 2008, Boost 1.37.0), but it makes some sort of sense, as the key in a map is immutable. Stuart Dootson