return s;
}
-const char Duration::type_p_name_[] = "ly:duration?";
+const char * const Duration::type_p_name_ = "ly:duration?";
int
-Duration::print_smob (SCM port, scm_print_state *)
+Duration::print_smob (SCM port, scm_print_state *) const
{
scm_puts ("#<Duration ", port);
scm_display (ly_string2scm (to_string ()), port);