[chuck-users] assignment (BUG?)

[Robert Poor]

I'm not the expert, but I thought that the ChucK rules for assignment  
are:

[1] For "reference" data types, (arrays and objects), @=> assigns the  
pointer, not the data.  This is why
	Object foo;
	Object @bar;
	foo @=> bar;
creates an "alias" of foo in bar.  When you manipulate either one and  
you are operating on the same object.

[2] For "immediate" data types (ints, float), => and @=> are  
identical: they move the data, not the pointer.  This is why
	int foo;
	int bar;
	foo @=> bar;  // assigns 0 to bar
	1 => foo;	
doesn't modify bar -- bar will still have a value of zero.

Any disagreements?

- r


On 31 May 2009, at 13:42, Kassen wrote:

> Fellow ChucKists,
>
>
> Either we have a bug or I don't understand assignment (quite  
> possibly both are the case, I won't rule that out). Consider this;
>
> int foo, bar;
>
> foo @=> bar;
>
> //alternately, this gives the same result
> //bar @=> foo;
>
> 1 => foo;
> <<<"bar is", bar>>>;
> <<<"foo is", foo>>>;
>
> I was expecting both to be 1 but here bar is 0 (Linux, miniAudicle  
> modified to host 1.2.1.2). The following behaves as I expect it to;
>
> int foo, bar;
>
> 1 => foo;
> foo @=> bar;
>
> 1 => foo;
> <<<"bar is", bar>>>;
> <<<"foo is", foo>>>;
>
> Before I start bothering everyone with my ideas on assignment as it  
> applies to UGens I'd like to be clear on what assignment does  
> exactly and whether this is proper behaviour.
>
> Yours,
> Kas.
> _______________________________________________
> chuck-users mailing list
> chuck-users at lists.cs.princeton.edu
> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users

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Robert Poor
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