LyXErr & operator<<(LyXErr &, unsigned int);
LyXErr & operator<<(LyXErr &, long);
LyXErr & operator<<(LyXErr &, unsigned long);
LyXErr & operator<<(LyXErr &, unsigned int);
LyXErr & operator<<(LyXErr &, long);
LyXErr & operator<<(LyXErr &, unsigned long);
LyXErr & operator<<(LyXErr &, double);
LyXErr & operator<<(LyXErr &, std::string const &);
LyXErr & operator<<(LyXErr &, docstring const &);
LyXErr & operator<<(LyXErr &, double);
LyXErr & operator<<(LyXErr &, std::string const &);
LyXErr & operator<<(LyXErr &, docstring const &);