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Article #4444

Re: On sequence points and evaluation order

#4444
From: Tanmoy Bhattacharya
Date: Thu, 07 Dec 1995 16:11
29 lines
2069 bytes
In article <4a6r9u$hq5@rdsunx.crd.ge.com>, volpe@bart.crd.ge.com (Christopher
R. Volpe) writes: 
<snip>
|> |>this to satisfy the _unsatisfiable_ edict of `statements are evaluated
|> |>in sequence': after all `f()+f();' is a statement --- is it done
|> |>before or after the statements comprising f? 
|> 
|> It's not unsatisfiable, because the edict includes the phrase "except where
|> otherwise specified", and function calls are one of those exceptions.

And 6.3 `the order of evaluation of subexpressions and ... are both
unspecified' (i.e. the clause which allowed interleaved expressions in the
first place) does not count as `except where otherwise specified'? If the
sequence point on both sides of i++ still leaves i + (a,i++,b) undefined; why
should i + f() where f() is a; i++; b; be any different?

Or rather, not why should it be different: it can be different by fiat. But,
I do not see even the genesis of the claim that the standard currently
specifies it clearly.

Cheers
Tanmoy
-- 
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References: <49l428$od0@bolverk.cs.cornell.edu> <49ojjp$hsm@newshost.lanl.gov> <49qiu7$25h@natasha.rmii.com> <49v3ii$nve@rdsunx.crd.ge.com> <1995Dec6.000503.6676@sq.com> <TANMOY.95Dec5221739@qcd.lanl.gov> <4a6r9u$hq5@rdsunx.crd.ge.com>

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Path: arc1-ca.pugleaf.net!qcd.lanl.gov!tanmoy
From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya)
Newsgroups: comp.std.c
Subject: Re: On sequence points and evaluation order
Date: 7 Dec 1995 16:11:12 GMT
Organization: Los Alamos National Laboratory
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References: <49l428$od0@bolverk.cs.cornell.edu> <49ojjp$hsm@newshost.lanl.gov>  <49qiu7$25h@natasha.rmii.com> <49v3ii$nve@rdsunx.crd.ge.com>  <1995Dec6.000503.6676@sq.com> <TANMOY.95Dec5221739@qcd.lanl.gov> <4a6r9u$hq5@rdsunx.crd.ge.com>
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