Re: Example in "The C++ Workbook" by Wiener and Pinson

Article View: comp.std.c++

Article #1588

#1588

From: Michael Taylor
Date: Fri, 04 Aug 1995 12:23

23 lines
1044 bytes

fenster@shadow.cs.columbia.edu (Sam Fenster) wrote:
>a2675528@athena.rrz.Uni-Koeln.DE (Paul Sponagl) writes:
>> or do like that
>>
>> 	inline template < class T > void swap(T& a, T& b)
>> 	{
>> 		a ^=b; b^=a;a ^=b;
>> 	}
>
>This sets `a' and `b' to zero if they refer to the same object.

Wrong!

Let a = 1001110
and b = 1001110

a ^= b; // -> a = 0
b ^= a; // -> b = 1001110
a ^= b; // -> a = 1001110


          Michael Taylor
	    michaelt@asymetrix.com

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Path: arc1-ca.pugleaf.net!hubble.asymetrix.com!lurking-evil
From: michaelt@asymetrix.com (Michael Taylor)
Newsgroups: comp.std.c++
Subject: Re: Example in "The C++ Workbook" by Wiener and Pinson
Date: Fri, 04 Aug 95 12:23:15 GMT
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