[V3dot10] Re: 0006583: PositionableStream>>back behavior is totallywrong

[Ron Teitelbaum]

Klaus,

I was just reading Damien's new code and even though the current
implementation does position correctly it returns the wrong value.  Damien's
code returns the proper back value and replaces #next with #peek, to leave
the position in the right place.

It's a good change.  Not sure I support leaving #oldBack for long though.
There doesn't appear to be much use of getting a returned result 2 positions
back from a call to oldBack.  

Ron Teitelbaum

> -----Original Message-----
> From: v3dot10-bounces at lists.squeakfoundation.org [mailto:v3dot10-
> bounces at lists.squeakfoundation.org] On Behalf Of Klaus D. Witzel
> 
> Hi Damien,
> 
> an actual user of #back is #asSignedInteger, from which I derived the
> following invariant:
> 
>   aStream position == (aStream next; back; position)
> 
> So #back can't be that wrong, no?
> 
> /Klaus
> 
> From: "Damien Cassou"
> Newsgroups: gmane.comp.lang.smalltalk.squeak.v3dot10
> Subject: 0006583: PositionableStream>>back behavior is totally wrong
> Date: Wed, 01 Aug 2007 16:47:27 +0200
> URL: news://<6ac749c10708010747h421fac8fq52a56aad37a0e7f1@mail.gmail.com>
> 
> http://bugs.squeak.org/view.php?id=6583
> 
> 
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