Re: Forth for education

From	"Rod Pemberton" <dont_use_email@nohavenotit.com>
Newsgroups	comp.lang.forth
Subject	Re: Forth for education
Date	2013-09-12 08:10 -0400
Organization	Aioe.org NNTP Server
Message-ID	<op.w3ar3owu0e5s1z@-> (permalink)
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On Wed, 11 Sep 2013 06:52:54 -0400, Alex McDonald <blog@rivadpm.com> wrote:
> on 11/09/2013 11:21:59, "Rod Pemberton" wrote:
...

> [snip]
>
>> It doesn't have a GOTO ? It's true that it doesn't have an explicitly
>> named GOTO . However, most interpreter based Forth's have BRANCH .
>> Just what do you think that does? Many of them have AHEAD and AGAIN
>> too which are simple wrappers around BRANCH or it's equivalent if not
>> present. And, the assembly language Forth's just use the host's jump
>> instruction.
>>
>
> I'm not sure I understand your point here, [...]

Well, what did you expect?

You ignored and snipped all prior context...

The point was "spaghetti code" can be written in interpreted Forths,
contrary to the claims of Hugh and Ms. Rather, because most of them
have a named equivalent of GOTO that is available to the user.

> Many languages do not have an explicit GOTO or labels;
...

> Many languages do not have an explicit GOTO or labels;
> Forth is one of them.

I stated that Forth doesn't have an explicit GOTO directly above.
It's still in the quoted portion that you didn't snip.  Do you
always parrot what others say directly back to them?  That seems
like a very strange behavior to me.  How do you rationalize doing
that without a realization of doing so?  Was it a conscious decision?
If so, what for?  If not, I have no problem letting that slide as
a strange coincidence or Freudian-slip issue...  Are you staring
at register code too much?  E.g., XCHG EAX, EDX.  It should be
MOV EAX, EDX or PUSH EDX.  The latter frees up a register... lol.

> BRANCH is an implementation detail to use the host's jump, not a
> language feature.

Is it accessable to the user?  Is it available in quite a few Forths?
If so, your word games are irrevelant to the discussion.  ;-)

> [link Wil Baden code]

He's an interesting guy.  He seemed to post more working and useful
Forth code than most of the other c.l.f. notables, except maybe Gassenenko.
I've seen a few similar posts to c.l.f on how to implement control-flow.
I'm not sure if that was one of them.  The more advanced methods that
use POSTPONE CS-ROLL and a method to resolve nested branch addresses,
I can't use in my Forth, or couldn't originally.  So, they had to be
reduced or translated to the older, simpler implementations, upfront.
I could probably rewrite them now or with a bit more work...

Rod Pemberton
-- 
Fences are great.  I need a fence.  You can use them to post signs:
  "Blind people have the right to bear arms! Why wouldn't we?"
  "Sorry officer, I can't call off the dogs. Those aren't MY dogs..."
  "I believe in the cross. Cross-hairs on target... nailed to wood."
  "Would you like to see a free-range, pitbull hunt? I would! Run."
  "Laser dot. Scope. Win 308. C4 vertebra. Spoonfed for life."

Thread

Forth for education visualforth@rocketmail.com - 2013-09-09 05:16 -0700
  Re: Forth for education Matthias Koch <matthias.koch@hot.uni-hannover.de> - 2013-09-09 14:59 +0200
  Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-10 04:30 -0400
    Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-10 08:00 -1000
      Re: Forth for education hughaguilar96@yahoo.com - 2013-09-10 21:32 -0700
        Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-11 06:22 -0400
          Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-11 11:52 +0100
            Re: Forth for education Matthias Koch <matthias.koch@hot.uni-hannover.de> - 2013-09-11 14:40 +0200
            Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-12 08:10 -0400
              Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-12 14:20 +0100
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-14 22:47 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-14 17:47 -1000
                Re: Forth for education stephenXXX@mpeforth.com (Stephen Pelc) - 2013-09-15 17:17 +0000
                Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-15 18:52 +0100
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-15 08:11 -1000
                Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-15 19:49 +0100
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-15 09:11 -1000
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-15 20:38 -0700
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-17 17:21 -0400
                Re: Forth for education Spam@ControlQ.com - 2013-09-17 18:01 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-17 14:31 -1000
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-17 22:20 -0700
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-17 22:23 -0700
                Re: Forth for education Bernd Paysan <bernd.paysan@gmx.de> - 2013-09-18 21:56 +0200
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-18 02:57 -0500
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-18 09:41 -0400
                Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-18 15:35 +0100
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-18 21:02 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-18 15:42 -1000
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 15:48 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-20 11:26 -1000
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 20:35 -0400
                Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-19 13:45 +0100
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 16:18 -0400
                Re: Forth for education Alex McDonald <blog@rivadpm.com> - 2013-09-20 14:06 -0700
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-20 17:08 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-20 12:00 -1000
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 20:10 -0400
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-20 23:23 -0700
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-21 13:09 -0400
                Re: Forth for education Mark Wills <markrobertwills@yahoo.co.uk> - 2013-09-23 01:55 -0700
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-23 11:40 -0500
                Re: Forth for education albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-09-23 17:45 +0000
                Re: Forth for education anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-09-23 18:47 +0000
                Re: Forth for education albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-09-24 17:00 +0000
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-23 14:51 -0500
                Re: Forth for education albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-09-24 16:50 +0000
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-24 12:02 -0500
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-21 05:21 -0500
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-21 14:15 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-21 08:52 -1000
                Re: Forth for education Paul Rubin <no.email@nospam.invalid> - 2013-09-21 14:23 -0700
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-22 04:53 -0500
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-22 19:00 -0700
                Re: Forth for education Whammo <sidciavic@gmail.com> - 2013-09-22 21:22 -0700
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-23 08:13 -1000
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 04:25 -0400
                Re: Forth for education visualforth@rocketmail.com - 2013-09-24 21:38 -0700
                Re: Forth for education Rob Sciuk <rob@controlq.com> - 2013-09-23 12:07 -0400
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-23 11:50 -0500
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 03:58 -0400
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-26 09:32 -0400
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-27 19:35 -0700
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-28 01:08 -0400
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-28 01:09 -0400
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 03:21 -0400
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-25 04:00 -0500
                Re: Forth for education Brad Eckert <hwfwguy@gmail.com> - 2013-09-25 09:26 -0700
                Re: Forth for education visualforth@rocketmail.com - 2013-09-25 15:14 -0700
                Re: Forth for education Doug Hoffman <glidedog@gmail.com> - 2013-09-26 07:51 -0400
                Re: Forth for education visualforth@rocketmail.com - 2013-09-26 23:36 -0700
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-21 14:40 -0400
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-21 04:46 -0500
                Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-18 11:41 -0500
                Re: Forth for education Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-09-18 22:08 +0100
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-18 21:10 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-18 16:20 -1000
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 16:39 -0400
                Re: Forth for education Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-09-19 12:47 +0100
                Re: Forth for education Spam@ControlQ.com - 2013-09-19 11:30 -0400
                Re: Forth for education Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-09-19 16:48 +0100
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 16:51 -0400
                Re: Forth for education Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-09-20 23:17 +0100
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-21 15:19 -0400
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 03:31 -0400
                Re: Forth for education hughaguilar96@yahoo.com - 2013-09-18 21:12 -0700
                Re: Forth for education Mark Wills <markrobertwills@yahoo.co.uk> - 2013-09-19 01:02 -0700
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-21 15:26 -0400
                Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 17:09 -0400
                Re: Forth for education anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-09-19 11:28 +0000
                Re: Forth for education Paul Rubin <no.email@nospam.invalid> - 2013-09-18 18:30 -0700
                Re: Forth for education "WJ" <w_a_x_man@yahoo.com> - 2013-09-19 22:51 +0000
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-15 14:06 -0400
                Re: Forth for education Brad Eckert <hwfwguy@gmail.com> - 2013-09-15 19:56 -0700
              Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-12 08:03 -1000
          Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-11 08:59 -1000
            Re: Forth for education albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-09-12 10:48 +0000
              Re: Forth for education Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-09-12 08:17 -0500
        Re: Forth for education "WJ" <w_a_x_man@yahoo.com> - 2013-09-13 12:48 +0000
          Re: Forth for education Mark Wills <markrobertwills@yahoo.co.uk> - 2013-09-13 06:33 -0700
          Re: Forth for education m.a.m.hendrix@tue.nl - 2013-09-13 07:25 -0700
          Re: Forth for education visualforth@rocketmail.com - 2013-09-13 21:20 -0700
          Re: Forth for education "WJ" <w_a_x_man@yahoo.com> - 2013-09-15 09:04 +0000
            Re: Forth for education mhx@iae.nl - 2013-09-15 02:57 -0700
        Forth is not interactive "WJ" <w_a_x_man@yahoo.com> - 2013-09-20 03:32 +0000
          Re: Forth is not interactive rickman <gnuarm@gmail.com> - 2013-09-20 01:20 -0400
          Re: Forth is not interactive Whammo <sidciavic@gmail.com> - 2013-09-19 23:41 -0700
            Re: Forth is not interactive "Elizabeth D. Rather" <erather@forth.com> - 2013-09-19 21:45 -1000
              Re: Forth is not interactive "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 04:09 -0400
                Re: Forth is not interactive "Elizabeth D. Rather" <erather@forth.com> - 2013-09-19 22:21 -1000
                WJ, aka William James [was Re: Forth is not interactive] "Alex McDonald" <blog@rivadpm.com> - 2013-09-20 10:55 +0100
                Re: WJ, aka William James [was Re: Forth is not interactive] Mark Wills <markrobertwills@yahoo.co.uk> - 2013-09-20 06:17 -0700
                Re: WJ, aka William James [was Re: Forth is not interactive] rickman <gnuarm@gmail.com> - 2013-09-20 13:19 -0400
                Re: WJ, aka William James [was Re: Forth is not interactive] "Alex McDonald" <blog@rivadpm.com> - 2013-09-20 19:45 +0100
                Re: WJ, aka William James [was Re: Forth is not interactive] rickman <gnuarm@gmail.com> - 2013-09-20 14:53 -0400
              Re: Forth is not interactive Mark Wills <markrobertwills@yahoo.co.uk> - 2013-09-20 01:20 -0700
          Re: Forth is not interactive Howerd <howerdo@yahoo.co.uk> - 2013-09-20 02:35 -0700
            Re: Forth is not interactive Howerd <howerdo@yahoo.co.uk> - 2013-09-20 02:39 -0700
          Re: Forth is not interactive mhx@iae.nl - 2013-09-21 04:05 -0700
          Re: Forth is not interactive albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-09-21 12:43 +0000
    Re: Forth for education stephenXXX@mpeforth.com (Stephen Pelc) - 2013-09-12 14:04 +0000
    Re: Forth for education "Ed" <invalid@invalid.com> - 2013-09-15 18:00 +1000
  Re: Forth for education voidvolker@gmail.com - 2013-09-14 10:41 -0700
    Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-14 10:53 -1000
  Re: Forth for education "WJ" <w_a_x_man@yahoo.com> - 2013-09-19 22:33 +0000
    Re: Forth for education visualforth@rocketmail.com - 2013-09-19 17:17 -0700
      Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 17:44 -0400
        Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-20 23:58 +0100
          Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-20 19:49 -0400
            Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-21 20:33 +0100
              Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 03:49 -0400
                Re: Forth for education "Alex McDonald" <blog@rivadpm.com> - 2013-09-25 09:42 +0100
                Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-26 09:39 -0400
                Re: Forth for education Doug Hoffman <glidedog@gmail.com> - 2013-09-26 10:40 -0400
                Re: Forth for education "Elizabeth D. Rather" <erather@forth.com> - 2013-09-26 08:51 -1000
        Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-20 22:50 -0400
          Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-21 14:27 -0400
            Re: Forth for education rickman <gnuarm@gmail.com> - 2013-09-21 15:33 -0400
              Re: Forth for education "Rod Pemberton" <dont_use_email@nohavenotit.com> - 2013-09-25 03:37 -0400
        Re: Forth for education Paul E Bennett <Paul_E.Bennett@topmail.co.uk> - 2013-09-21 10:02 +0100

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