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From: jtr485@umich.UUCP (Johnathan Tainter)
Newsgroups: comp.lang.c
Subject: Re: conditional expression evaluati
Message-ID: <34@umich.UUCP>
Date: Wed, 21-Jan-87 10:54:58 EST
Article-I.D.: umich.34
Posted: Wed Jan 21 10:54:58 1987
Date-Received: Fri, 23-Jan-87 21:04:19 EST
References: <425@bobkat.UUCP> <102600001@datacube>
Organization: EECS, University of Michigan
Lines: 15

In article <102600001@datacube>, stephen@datacube.UUCP writes:
>>     x = (a | b | c);
>> if the variable `a' contains zero, the compiler must still OR the
>> contents of `b' and `c' to determine the result.  These are bitwise
>> logical operators.  Short-circuiting these makes no more sense than
>> short-circuiting a sequence of multiplies as soon as one of the
>> operands evaluates to `1'.
>> Mike McNally                                    Digital Lynx Inc.
> This posting indicates a misunderstanding of how short-circuit evaluation
> works. In the case of the '|' expression above, the decision to not evaluate
> is would occur when a or b are all ones, NOT when a or b was zero.
You mean if the '|' had been a '||', of course.
And actually, when a or b is NONZERO not ALL ONES.
--j.a.tainter
> Stephen Watkins                    UUCP: ihnp4!datacube!stephen