Number of enums

[Norman Diamond]

In article <703 at caslon.cs.arizona.edu> dave at cs.arizona.edu (Dave P. Schaumann) writes:

>C is lacking (as far as I know) a general way to get the last value of an
>enum type.

Yes.

>For instance, suppose I have:
>typedef enum { SUN, MON, TUE, WED, THU, FRI, SAT } days_t ;
>The best I have come up with is to do this:
>#define last_days_t SAT /* Named as last_ ## <enum type name> */

I use:
typedef enum days_t { SUN, MON, TUE, WED, THU, FRI, SAT, NO_OF_DAYS } days_t;
And make sure that new days are added before NO_OF_DAYS.
If I also need LAST_DAY, I use:
#define LAST_DAY  (NO_OF_DAYS - 1)

I wouldn't make a name like "last_days_t" a constant; the name looks like
a type.  Of course, every type name that I named during the past 11 years
is now in the POSIX reserved name space :-(

--
Norman Diamond       diamond at tkov50.enet.dec.com
If this were the company's opinion, I wouldn't be allowed to post it.