int macro_is_digit (int c);
-/* Stringify STR according to C rules and return an xmalloc'd pointer
- to the result. */
-
-char *macro_stringify (const char *str);
+/* Stringify STR according to C rules and return a null-terminated string. */
+gdb::unique_xmalloc_ptr<char> macro_stringify (const char *str);
#endif /* MACROEXP_H */