FW: [avr-gcc-list] Dumb C question

[J.C. Wren]

I don't know of a way equivalent to sizeof(), but I usually do it like this

typedef enum
{
   menuItem_zero = 0,
   menuItem_next,
   menuItem_another
   menuItem_MAX
}
menuItem_e

I denote structs with _s, types with _t and enums with _e on the ends.  I
use typedefs for just about everything, since this allows type checking, and
even cooler, switch statements that tell you if you don't check every case
with no default.

I also prefix each enum with the typedef name, since enums are globally
scoped (unlike structs, where the structure element is locally scoped to the
struct definition).  At a glance, this allows me to tell what enum it's a
member of.

And because old ways sometimes die hard, I always initialize the first
element of the enum.  I was taught this by someone who had been bit by a
compiler that started enums at 1 instead of 0 (Dog knows why...), and it
imposes no addition cost.

--John

-----Original Message-----
From: address@hidden [mailto:address@hidden
Behalf Of Larry Barello
Sent: Friday, August 16, 2002 12:18
To: AVR GCC List
Subject: [avr-gcc-list] Dumb C question


I am slogging into the future and learning how to use "enums".  Is there an
elegant way to find out how many items there are in a particular enum?  i.e.

enum eMenuItem
{
    D_this,
    D_that,
    D_TheOtherThing
}

If I say "sizeof(enum eMenuItem)" I just get 2, which of course is the size
of the enum.

Cheers!

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