Mailinglist Archive: opensuse-programming (61 mails)
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Re: [suse-programming-e] system-dependent behaviour
- From: Anders Johansson <andjoh@xxxxxxxxxx>
- Date: Sat, 10 Sep 2005 19:39:53 +0200
- Message-id: <200509101939.53917.andjoh@xxxxxxxxxx>
On Saturday 10 September 2005 17:47, Jerry Feldman wrote:
> Just to add to Anders comments.
> According to the ANSI 89 standard, this is an unspecified operation.
> The issue here is when the postincrement operator is applied to s.
> C pushes variables from the last to the first because it may have an
> unknown number of parameters.
This is a completely unwarranted assumption. This may be the way any one
compiler works (and it does make sense), but according to 6.5.2.2 of the 1999
standard
"The order of evaluation of the function designator, the actual arguments, and
subexpressions within the actual arguments is unspecified, but there is a
sequence point before the actual call"
So while I'm sure you're right about any one compiler, it is very wrong to say
that C does it, and suicidal to rely on it
> Just to add to Anders comments.
> According to the ANSI 89 standard, this is an unspecified operation.
> The issue here is when the postincrement operator is applied to s.
> C pushes variables from the last to the first because it may have an
> unknown number of parameters.
This is a completely unwarranted assumption. This may be the way any one
compiler works (and it does make sense), but according to 6.5.2.2 of the 1999
standard
"The order of evaluation of the function designator, the actual arguments, and
subexpressions within the actual arguments is unspecified, but there is a
sequence point before the actual call"
So while I'm sure you're right about any one compiler, it is very wrong to say
that C does it, and suicidal to rely on it
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