This is the test program I would like to be explained to me: #include <iostream> #include <string> #include <boost/exception.hpp> struct MyException: virtual boost::exception{ }; class MyClass { char* s; public: MyClass(const char* msg) : s(strdup(msg)){ } MyClass(const MyClass& c){ s = strdup(c.s); } ~MyClass(){ free(s); } }; void main() { MyException ex; ex << boost::error_info<struct my_tag1, MyClass>("qweqwe"); ex << boost::error_info<struct my_tag2, std::string>("asdasd"); std::cout << boost::diagnostic_information(ex); } This is the program output:

Throw in function (unknown) Dynamic exception type: struct MyException [PAUmy_tag1@?1?main@] = [ type: ?AV?$error_info@Umy_tag1@?1?main@VMyClass @@@boo t@@, size: 8, dump: 50 69 10 01 b8 18 7f 00 ] [PAUmy_tag2@?1?main@] = asdasd

So, my question: what should I do with 'MyClass' to see the output like this:

Throw in function (unknown) Dynamic exception type: struct MyException [PAUmy_tag2@?1?main@] = qweqwe (Wow !!! Terrible dump is replaced with readable string here !!!???) [PAUmy_tag2@?1?main@] = asdasd

Thanks, Andrew.