// Most default functions are do-nothings. void init() will
// recognize their address when not overriden and will then refrain
// altogether from passing the the respective callbacks to GUILE.
- SCM mark_smob (void);
+ SCM mark_smob (void) const;
static SCM mark_trampoline (SCM); // Used for calling mark_smob
static size_t free_smob (SCM obj);
static SCM equal_p (SCM, SCM);