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Re: RfD: TRAVERSE-WORDLIST v4

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On Fri, 02 Mar 2012 00:15:27 -0000, BruceMcF <agila61@netscape.net> wrote:

> This is a side issue, since I do not think that i=j should be
> incorporated into the standard, except possibly as advice, but ...
>
> On Mar 1, 3:45 am, "Peter Knaggs" <p...@bcs.org.uk> wrote:
>>> ... is trying to convey that the parameters can change, even though
>>> the depth cannot ... since:
>>>    ( x*i ... -- x*i ... )
>
>>> ... would imply that the stack parameters are not modified.
>>
>> No. If that where the case they simply would not be part of the
>> stack description at all.  The fact that they are in the description
>> means they may change and that the definition should explain how.
>
> In all the stack pictures I can recall off the top of my head with the
> identical stack reference in the input and output side, they are
> unmodified. If they are modifieable, that is indicated by, eg:
>    ( ca1 -- ca2 )
>
> Its possible to have a class of xt's that refer to information on the
> stack without modifying it. In that case, not referring to that data
> that is referred to but not modified would seem to permit an
> implementation to call the xt with something on the stack underneath
> the specified:
>    ( nt -- u )

Yes.

-- 
Peter Knaggs

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Thread

RfD: TRAVERSE-WORDLIST v4 Alex McDonald <blog@rivadpm.com> - 2012-02-28 05:14 -0800
  Re: RfD: TRAVERSE-WORDLIST v4 anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-02-28 17:18 +0000
    Re: RfD: TRAVERSE-WORDLIST v4 Alex McDonald <blog@rivadpm.com> - 2012-02-28 13:54 -0800
      Re: RfD: TRAVERSE-WORDLIST v4 "Elizabeth D. Rather" <erather@forth.com> - 2012-02-28 12:16 -1000
        Re: RfD: TRAVERSE-WORDLIST v4 anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-02-29 15:42 +0000
          Re: RfD: TRAVERSE-WORDLIST v4 "Elizabeth D. Rather" <erather@forth.com> - 2012-02-29 06:49 -1000
          Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-02-29 20:05 +0000
      Re: RfD: TRAVERSE-WORDLIST v4 BruceMcF <agila61@netscape.net> - 2012-02-28 14:40 -0800
        Re: RfD: TRAVERSE-WORDLIST v4 anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-02-29 15:47 +0000
          Re: RfD: TRAVERSE-WORDLIST v4 BruceMcF <agila61@netscape.net> - 2012-02-29 08:13 -0800
    Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-02-29 20:07 +0000
  Re: RfD: TRAVERSE-WORDLIST v4 Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-02-29 11:27 +0000
  Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-02-29 20:20 +0000
    Re: RfD: TRAVERSE-WORDLIST v4 BruceMcF <agila61@netscape.net> - 2012-02-29 16:44 -0800
      Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-03-01 08:45 +0000
        Re: RfD: TRAVERSE-WORDLIST v4 BruceMcF <agila61@netscape.net> - 2012-03-01 16:15 -0800
          Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-03-02 09:58 +0000
            Re: RfD: TRAVERSE-WORDLIST v4 BruceMcF <agila61@netscape.net> - 2012-03-02 22:37 -0800
  Re: RfD: TRAVERSE-WORDLIST v4 Alex McDonald <blog@rivadpm.com> - 2012-03-04 14:03 -0800
    Re: RfD: TRAVERSE-WORDLIST v4 "Peter Knaggs" <pjk@bcs.org.uk> - 2012-03-05 13:20 +0000
    Re: RfD: TRAVERSE-WORDLIST v4 anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-03-05 14:18 +0000
  Re: RfD: TRAVERSE-WORDLIST v4 Alex McDonald <blog@rivadpm.com> - 2012-03-27 15:23 -0700

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