[sbe-discussion] Re: Chapter on streams - bad analogy, or broken implementation?

[stephane ducasse]

Hi kim

can you check if this is fixed in 3.10?
because it seems that damien fixed all the buggy stream methods but  
may be only for 3.10

Stef


On 4 déc. 07, at 11:50, Kim Sullivan wrote:

> Hello,
>
> I have been working on some parsing stuff for a school project. I  
> already
> had read the chapter on streams, and it seemed perfectly clear to  
> me that
> the "pointer" is between elements, and on "on" an element.  
> Unfortunately,
> that assumption doesn't hold when you start using back and peekBack  
> - those
> two methods work as if the position was on the item that the  
> previous next
> returned, and return the item that is before that. At first I  
> thought that
> the way it is described in SBE is wrong, but now I think that the back
> methods are broken, and wrote my own implementations, previous and
> peekPrevious. The back methods  don't seem to be used much anyway,  
> at least
> in the image that I have which is based on 3.7 I think, and the  
> code that
> uses them could be fixed.
>
> My question is - how should I proceed? Should I report a bug in  
> Squeak so
> that the back method gets fixed, or should I submit  my own  
> implementations
> of previous and peekPrevious, keeping the back methods for backwards
> compatibility?
>
> In any case, I think that the current behaviour of the back methods  
> should
> be mentioned in SBE (in the version of the book that I have, they  
> aren't
> mentioned at all).
>
> Regards,
> Kim Sullivan
>
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