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From: guy@sun.UUCP
Newsgroups: net.lang.c
Subject: Re: Re: Re: Precedent for use of =
Message-ID: <5057@sun.uucp>
Date: Sat, 12-Jul-86 15:50:14 EDT
Article-I.D.: sun.5057
Posted: Sat Jul 12 15:50:14 1986
Date-Received: Sun, 13-Jul-86 05:40:50 EDT
References: <2323@umcp-cs.UUCP> <514@cbmvax.cbmvax.cbm.UUCP>
Organization: Sun Microsystems, Inc.
Lines: 23

> Hey, you can use assignment in C as if it were a statement only when you
> write YOUR C code, but in the example that you give its used in its full
> power as an operator, which can generate much more efficient code than
> the equivalent:
> 
> a=b
> if (b)

If your compiler can't generate equally efficient code for

	a = b;
	if (a != 0)

and

	if ((a = b) != 0)

on any machine other than an incredibly weird one, then your compiler needs
to be improved.
-- 
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com (or guy@sun.arpa)