16 typedef struct Edit Edit;  typedef
17 struct Edit {  struct
26 	char *(*add)(Edit*, char*, vlong, vlong);  argument
27 	char *(*del)(Edit*, Part*);  argument
28 	char *(*ext)(Edit*, int, char**);  argument
29 	char *(*help)(Edit*);  argument
30 	char *(*okname)(Edit*, char*);  argument
31 	void (*sum)(Edit*, Part*, vlong, vlong);  argument
32 	char *(*write)(Edit*);  argument
33 	void (*printctl)(Edit*, int);  argument
46 char	*getline(Edit*);  argument