/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2011 Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1997--2015 Jan Nieuwenhuizen <janneke@gnu.org>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
string _f (char const *format, ...)
__attribute__ ((format (printf, 1, 2)));
-string _f (char const *format, string s, string s2 = "", string s3 = "");
+string _f (char const *format, const string &s, const string &s2 = "", const string &s3 = "");
/**
va_list version of _f
*/