static void add_tie (Grob *me, Grob *);
DECLARE_SCHEME_CALLBACK (calc_positioning_done, (SCM));
DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM));
static void add_tie (Grob *me, Grob *);
DECLARE_SCHEME_CALLBACK (calc_positioning_done, (SCM));
DECLARE_SCHEME_CALLBACK (before_line_breaking, (SCM));