a question about sdshdr5

[sky xiong]

Hi,

when I read sds.h，I find the note indicate that "sdshdr5 is never used, we just access the flags byte directly.However is here to document the layout of type 5 SDS strings.".

but when I set a short string, like ">set test hello", I find  the key "test" is actuall stroed by sdshdr5 by gdb.it seems  that sdshdr5  is used.

what does that  notes mean?

Here is the source code :

/* Note: sdshdr5 is never used, we just access the flags byte directly.
 * However is here to document the layout of type 5 SDS strings. */
struct __attribute__ ((__packed__)) sdshdr5 {
    unsigned char flags; /* 3 lsb of type, and 5 msb of string length */
    char buf[];
};