: int st_delete_safe(register st_table *table, register char **key, char **value, char *never) 
    st_delete() ȻƤ뤬ξǤ˺ΤǤϤʤ never 
    񤭤Ǥst_cleanup_safe() ˺Ǥ롣
    Ruby Ǥ never ˤ Qundef Ȥ

