From: dontmailme AT iname DOT com (Steamer)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: calculating size (like sizeof in TurboC++)
Date: Sun, 18 Jun 2000 16:51:18 GMT
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Cherniavsky Beni wrote:

> > > I recently started programming with djgpp+allegro and now I'd like to know
> > > what function djgpp provides for calculating the size of a variable ( like
> > > sizeof()).
> > 
> > The sizeof operator is standard C, so DJGPP supports it.
> > 
> > S.
> 
> It might be useful to emphasize that sizeof(expression) is not a function that
> can be implemented by any library but an *operator*.  It is computed at
> *compile time* as a property of the type of the expression (which is never
> computed).

This is true in C89/C90.  But note that C99 has variable length arrays,
and sizeof applied to such an array is computed at execution time.
Moreover, DJGPP (or rather gcc) already supports this, even though it
is as yet a long way from being C99-compliant.

S.