typedef struct triewalk triewalk;
triewalk *triewalk_new(const void *t);
const struct trie_file *triewalk_next(triewalk *tw, char *buf);
typedef struct triewalk triewalk;
triewalk *triewalk_new(const void *t);
const struct trie_file *triewalk_next(triewalk *tw, char *buf);