{

test_failure(char const* expr, char const* /*function*/, char const* file, unsigned line)

: msg(file + boost::python::str(":%s:") % line + ": Boost.Python assertion failure: " + expr)

{}

~test_failure() throw() {}

char const* what() const throw()

{

return boost::python::extract<char const*>(msg)();

}

boost::python::str msg;