ref: 7e554a8ec0d3e0ebfcc9be61e9df130a331b98ad
dir: /sys/include/complete.h/
#pragma	lib	"libcomplete.a"
#pragma src "/sys/src/libcomplete"
typedef struct Completion Completion;
struct Completion{
	uchar advance;		/* whether forward progress has been made */
	uchar complete;	/* whether the completion now represents a file or directory */
	char *string;		/* the string to advance, suffixed " " or "/" for file or directory */
	int nmatch;		/* number of files that matched */
	int nfile;			/* number of files returned */
	char **filename;	/* their names */
};
Completion* complete(char *dir, char *s);
void freecompletion(Completion*);