Re: Forth programming style...

From	"Alex McDonald" <blog@rivadpm.com>
Newsgroups	comp.lang.forth
Subject	Re: Forth programming style...
Date	2015-07-28 12:38 +0100
Organization	A noiseless patient Spider
Message-ID	<mp7pg6$mjp$1@dont-email.me> (permalink)
References	<a0bb956b-a98d-4ed1-b4d4-a5db465be92e@googlegroups.com><37e85f47-5cf3-4033-9e9d-bfc31c582edc@googlegroups.com><1a2e838f-e3f7-4f99-a321-9a02c1d6d6cb@googlegroups.com><84a2fcaf-807e-46a0-8c38-e68515a83c67@googlegroups.com><654e3729-7fce-4a04-a707-a0d5f7ab6050@googlegroups.com><55357ad6-5a4b-4ef6-b46b-7d05f9c5b3cf@googlegroups.com><4a7026e6-18ea-4f7c-a255-7874baba3769@googlegroups.com> <87si8gt1hs.fsf@jester.gateway.sonic.net> <mp7nmo$3h3$1@speranza.aioe.org>

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on 28/07/2015 12:06:46, "HAA" wrote:
> Paul Rubin wrote:
>> ...
>> The genius of Forth was realizing this situation doesn't occur all that
>> often.  But it does sometimes occur.  Chuck's code uses VARIABLEs rather
>> freely to deal with it when it arises.  That means you either burn RAM
>> by permanently allocating a cell for each such variable even when
>> they're not simultaneously in use, or else you have to carefully track
>> which ones might overlap during nested calls.  You also must handle the
>> possibility of such variables being used by multiple words.  Better is
>> to use stack-like allocation for them, plus temporary names, and that
>> which is what locals amounts to.
> 
> Too complicated.  Use the Forth, Luke.
> 
> 0 value LVAR
> 
> : word1
> LVAR >R
> ... do stuff with LVAR ...
> R> TO LVAR ;
> 
> : word2
> LVAR >R
> ... do stuff with LVAR ...
> R> TO LVAR ;
> 
> What?  It lacks the eye-candy of ANS/200x locals?  Fortunately my
> purpose is to offer a solution to the issues raised in the post - not
> promote the concept of locals in Forth which Chuck firmly rejects.
> 
> 
> 

Well, there's BASE @ followed by BASE ! to address the problem of
"gratuitous base bashing" (which iirc is from Stephen Pelc). So it has a
history and pedigree.

What we need now is a real retro Forth conversation. I'll start with my
pet hate; >BODY ! on bodies one should never bang.

: inconstant create , does> @ ;
5 inconstant x
6 ' x >body !

Thread

Forth programming style... Mux <Yvo.Zoer@gmail.com> - 2015-07-21 15:40 -0700
  Re: Forth programming style... Julian Fondren <ayrnieu@gmail.com> - 2015-07-21 17:28 -0700
    Re: Forth programming style... Julian Fondren <ayrnieu@gmail.com> - 2015-07-21 17:39 -0700
      Re: Forth programming style... Mark Wills <markwills1970@gmail.com> - 2015-07-22 00:48 -0700
        Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-07-21 22:25 -1000
          Re: Forth programming style... onewingedshark@gmail.com - 2015-07-22 15:13 -0700
            Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-07-22 13:24 -1000
            Re: Forth programming style... stephen@mpeforth.com (Stephen Pelc) - 2015-07-23 08:28 +0000
        Re: Forth programming style... Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-07-22 02:38 -0700
          Re: Forth programming style... Mark Wills <markwills1970@gmail.com> - 2015-07-22 03:14 -0700
            Re: Forth programming style... humptydumpty <ouatubi@gmail.com> - 2015-07-22 03:45 -0700
              Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-07-22 08:37 -1000
              Re: Forth programming style... Paul Rubin <no.email@nospam.invalid> - 2015-07-22 12:51 -0700
                Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-07-22 10:14 -1000
                Re: Forth programming style... anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-07-23 06:23 +0000
                Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-23 16:59 -0700
                Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-23 20:18 -0700
                Re: Forth programming style... "HAA" <someone@microsoft.com> - 2015-07-28 21:06 +1000
                Re: Forth programming style... "Alex McDonald" <blog@rivadpm.com> - 2015-07-28 12:38 +0100
            Re: Forth programming style... "HAA" <someone@microsoft.com> - 2015-07-23 00:02 +1000
            Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-22 21:21 -0700
              Re: Forth programming style... "WJ" <w_a_x_man@yahoo.com> - 2015-07-23 09:05 +0000
                Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-23 16:47 -0700
                Re: Forth programming style... Mark Wills <markwills1970@gmail.com> - 2015-07-24 01:24 -0700
                Re: Forth programming style... franck.bensusan@gmail.com - 2015-07-24 03:48 -0700
                Re: Forth programming style... Paul Rubin <no.email@nospam.invalid> - 2015-07-24 18:15 -0700
                Re: Forth programming style... "HAA" <someone@microsoft.com> - 2015-08-01 13:21 +1000
            Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-22 21:48 -0700
            Re: Forth programming style... Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-07-22 22:28 -0700
              Re: Forth programming style... Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-02 00:43 +0200
            Re: Forth programming style... Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-02 00:22 +0200
              Re: Forth programming style... hughaguilar96@gmail.com - 2015-08-01 16:41 -0700
                Re: Forth programming style... "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-08-01 22:01 -0400
              Re: Forth programming style... anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-08-02 05:50 +0000
                Re: Forth programming style... Bernd Paysan <bernd.paysan@gmx.de> - 2015-08-02 16:33 +0200
            Re: Forth programming style... "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-08-01 22:04 -0400
              Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-08-02 08:54 -0500
                Re: Forth programming style... "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-08-03 04:51 -0400
                Re: Forth programming style... "Elizabeth D. Rather" <erather@forth.com> - 2015-08-03 17:36 -0500
        Re: Forth programming style... anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-07-22 10:16 +0000
      Re: Forth programming style... mhx@iae.nl - 2015-07-22 10:02 -0700
    Re: Forth programming style... anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-07-22 10:09 +0000
  Re: Forth programming style... Syd Rumpo <usenet@nononono.co.uk> - 2015-07-22 12:16 +0100
    Re: Forth programming style... Raimond Dragomir <raimond.dragomir@gmail.com> - 2015-07-22 07:59 -0700
  Re: Forth programming style... glidedog@gmail.com - 2015-07-23 04:24 -0700
  Re: Forth programming style... "Ala'a Alawi" <amalawi@gmail.com> - 2015-07-23 19:32 -0700
    Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-23 21:33 -0700
      Re: Forth programming style... borota@gmail.com - 2015-07-23 22:09 -0700
        Re: Forth programming style... hughaguilar96@gmail.com - 2015-07-23 22:57 -0700
        Re: Forth programming style... "Ala'a Alawi" <amalawi@gmail.com> - 2015-07-24 09:26 -0700
      Re: Forth programming style... "Ala'a Alawi" <amalawi@gmail.com> - 2015-07-24 09:26 -0700

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