成员的完整列表，这些成员属于 carefree_internal::carefree_exception< cpp_err_type, err_name >,包括所有继承而来的类成员

carefree_exception()	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline
carefree_exception(string msg)	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline
carefree_exception(const char *msg)	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline
err_type typedef	carefree_internal::carefree_exception< cpp_err_type, err_name >
get_err()	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline
get_msg()	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline
what()	carefree_internal::carefree_exception< cpp_err_type, err_name >	inline