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From: lvc@danews.ATT.COM (Larry Cipriani)
Newsgroups: comp.lang.c
Subject: Re: conditional expression evaluation question
Message-ID: <372@danews.ATT.COM>
Date: Thu, 15-Jan-87 12:43:10 EST
Article-I.D.: danews.372
Posted: Thu Jan 15 12:43:10 1987
Date-Received: Sat, 17-Jan-87 01:00:18 EST
References: <207@rebel.UUCP> <14306@amdcad.UUCP>
Organization: AT&T Medical Information Systems, Columbus, Oh
Lines: 20
Summary: bitwise operator semantics

Tim Olson write:

> Well... C only guarantees short-circuit evaluation for the operators
> '&&' and '||', not every conditional expression.  Note that the code that
> Mr. Sipe includes uses only the bit-wise or '|' operator, so short
> circuit evaluation is *not* guaranteed...

A lot of C programmers don't know that both operands of & | and ^
*are guaranteed* to be evaulated.  Historically && and || are
more recent than & | and ^.  A lot of old code is laying around (at
least here) that should be changed to use the newer operators.

> 	Tim Olson
> 	Advanced Micro Devices
> 	ihnp4!amdcad!tim

-- 

Larry Cipriani   Cornet 353-4999 AT&T (614) 860-4999
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