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- Path: newshost.lanl.gov!tanmoy
- From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya)
- Newsgroups: comp.std.c
- Subject: Re: The temporal scope of undefined behaviour [was Re: atexit() ...]
- Date: 23 Jan 1996 16:00:15 GMT
- Organization: Los Alamos National Laboratory
- Message-ID: <TANMOY.96Jan23090015@qcd.lanl.gov>
- References: <4dhfja$j50@fg70.rz.uni-karlsruhe.de> <4diicg$i9e@lyra.csx.cam.ac.uk>
- <TANMOY.96Jan22084309@qcd.lanl.gov>
- <DLMLL6.A0H@ukpsshp1.serigate.philips.nl>
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- In-reply-to: nmm1@cus.cam.ac.uk's message of 23 Jan 1996 10:53:56 GMT
-
- --text follows this line--
- In article <4e2eo4$ogq@lyra.csx.cam.ac.uk> nmm1@cus.cam.ac.uk (Nick
- Maclaren) writes:
- <snip>
- This is a very good question. I understand the standard to imply
- that all previous defined behaviour must have 'occurred', but
- there is (in general) no necessity for it to have had an effect
- on the outside world (assuming that such a thing exists). Some
- constructions (e.g. fflush()) require effects to be transmitted
- to the environment.
-
- Could you please elaborate on this? 3.16 seems to be saying that the
- behaviour of the program is undefined. It refers to both translation
- and execution phases, and even allows the translation to terminate: in
- which case there is no execution at all! I think a compiler core
- dumping is as conforming a response as the program starting with the
- program starting with an attempted execution of Bach, presumably
- because the compiler ignored the possibility and that led to a bizarre
- executable.
-
- So, I do not understand how you can demand `previous' defined
- behaviour to have occurred? Previous to what? Previous to the
- attempted translation of the construct leading to undefined behavior?
-
- Cheers
- Tanmoy
-
- --
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