-#if 0
-static int cons_depth;
-#define DBG(...) do { int d; for (d = 0; d < cons_depth; d++) printf (" "); printf(__VA_ARGS__); } while(0)
-#define DBG_IN() (cons_depth++)
-#define DBG_OUT() (cons_depth--)
-#define DBG_PR(c) ao_lisp_cons_print(ao_lisp_cons_poly(c))
-#define DBG_PRP(p) ao_lisp_poly_print(p)
-#else
-#define DBG(...)
-#define DBG_IN()
-#define DBG_OUT()
-#define DBG_PR(c)
-#define DBG_PRP(p)
-#endif
-