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Newsgroups: comp.lang.c++.moderated
From: John Potter <jpot...@falcon.lhup.edu>
Date: 24 Apr 2003 20:12:55 -0400
Local: Thurs, Apr 24 2003 8:12 pm
Subject: Re: THE POSTINCREMENT TIME
On 24 Apr 2003 19:15:27 -0400, ka...@gabi-soft.de (James Kanze) wrote:
> Any reordering which respects the above constraints is a legal execution You need to read a bit more carefully. It is only accessing the old value > path for the abstract machine. If any legal execution path results in > undefined behavior, the behavior is undefined. Accessing a variable > that is modified without an intervening sequence point (e.g. a function > call) other than to determine the new value (which of course, introduces > implicit ordering due to causal necessity) is undefined behavior. the gives undefined behavior. Otherwise, j + ++ i would be undefined. > In this case, one possible ordering is: Put that last read at the top which is also allowed and you have undefined > read c for incr behavior. John [ Send an empty e-mail to c++-h...@netlab.cs.rpi.edu for info ] You must Sign in before you can post messages.
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