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From: joemu@nsc-pdc.UUCP (Joe Mueller)
Newsgroups: net.lang,net.lang.c
Subject: Re: Re: Re: ... C builtin functions?
Message-ID: <562@nsc-pdc.UUCP>
Date: Mon, 21-Apr-86 12:48:45 EST
Article-I.D.: nsc-pdc.562
Posted: Mon Apr 21 12:48:45 1986
Date-Received: Thu, 24-Apr-86 07:23:49 EST
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Organization: NSC Portland Development Center, Portland Oregon
Lines: 15
Xref: watmath net.lang:2388 net.lang.c:8716

> > >C has standard built-in functions????
>   
> > Well, how about sizeof(foo)?
> > 
> > It looks like a function invocation, and is known and understood
> > by the compiler...
> 
> The thing is, sizeof() evaluates to a constant at run time, just like
> 'c'<<3  or  BUFSIZ  .  That makes it a pretty trivial function.  All it
> really does is give you a portable, automatic facility for referring to
> system dependencies.
> -- 

Sizeof is an operator, not a function. It's perfectly legal to say
"sizeof foo" (without the parens).