void is_int(long wanted, long seen, const char *fmt, ...);
void is_double(double wanted, double seen, double eps, const char *fmt, ...);
void is_string(const char *wanted, const char *seen, const char *fmt, ...);
void is_int(long wanted, long seen, const char *fmt, ...);
void is_double(double wanted, double seen, double eps, const char *fmt, ...);
void is_string(const char *wanted, const char *seen, const char *fmt, ...);