Exception &at(const std::string &) throw();
const char *where() const throw() { return wer.c_str(); }
const Debug::Backtrace &get_backtrace() const throw() { return bt; }
Exception &at(const std::string &) throw();
const char *where() const throw() { return wer.c_str(); }
const Debug::Backtrace &get_backtrace() const throw() { return bt; }