class MyInt { // some code inside.... operator int() { BOOST_STATIC_ASSERT(0 == sizeof(MyInt)); // or some mpl thing } }; "chun ping wang" <cablepuff@gmail.com> wrote in message news:7253f6b30801260850y6bdc052dq4fa01ff64542f93b@mail.gmail.com... Hi is their anyway for boost to allow only explicit conversion... like class MyInt { // some code inside.... operator int() {} }; myIntCalc(int, int); MyInt a, b; f = myInt(a, b); // compile error no implicit conversion. int x = boost::numeric_cast<int>(a); // k allow int y = static_cast<int>(b); // k allow. ------------------------------------------------------------------------------ _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users