I believe the order in this case is undefined and shouldn't be relied on.
The compiler doesn't convert it to C before compiling it, but the
effect on the meaning is the same.
So the safe thing is to force the order you want:
obj1 = [coder decodeObject];
obj2 = ""
return self initwithobject:obj1 and object:obj2];
-mike
On 10/25/07, Adam R. Maxwell <[EMAIL PROTECTED]> wrote:
>
> On Thursday, October 25, 2007, at 10:58AM, "Christiaan Hofman" <[EMAIL
> PROTECTED]> wrote:
> >A question for Mike, hope he sees this. It's related to the execution
> >order discussed recently. If in a method arguments are message calls,
> >is the order in which these arguments are executed actually
> >determined? So if I have something like:
> >
> >[anObject arg1:[obj1 acceessor1] arg2:[obj2 acceessor2]];
> >
> >is the order in which -accessor1 and -accessor2 are called determined?
> >
> >In context, this is relevant when passing arguments to an initializer
> >in -initWithCoder:, where the arguments are non-keyed coding calls.
> >tyhe order in which the decodeObject: calls are executed is relevant.
> >
> >- (id)initWithCoder:(NSCoder *)coder {
> > return [self initWithObject:[coder decodeObject] andObject:[coder
> >decodeObject]];
> >}
>
> If you converted this to call the IMP directly in C, I think you'd end up with
>
> initWithObjectIMP(self, _cmd, coderDecodeObjectIMP(coder, _cmd),
> coderDecodeObjectIMP(coder, _cmd));
>
> (pseudo-code...I have to look this up every time I use it). So if arg 2 of
> initWithObjectIMP() depends on arg1, I think you'd have to explicitly call it
> first. Dr. McCracken can certainly give a more reliable answer than my
> guess, though :).
>
> --
> Adam
>
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--
Michael McCracken
UCSD CSE PhD Candidate
research: http://www.cse.ucsd.edu/~mmccrack/
misc: http://michael-mccracken.net/wp/
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