Groups > comp.lang.forth > #22046

Re: The most elegant Forth interpreter.

From	Andrew Haley <andrew29@littlepinkcloud.invalid>
Subject	Re: The most elegant Forth interpreter.
Newsgroups	comp.lang.forth
References	(6 earlier) <AsydnQSMvYzfsuPMnZ2dnUVZ_oGdnZ2d@supernews.com> <_IydnS9MuYNaK-PMnZ2dnUVZ_jqdnZ2d@supernews.com> <klmfn2$at2$1@online.de> <dv-dnWXUAepheOPMnZ2dnUVZ_sWdnZ2d@supernews.com> <klmp3i$haf$1@online.de>
Message-ID	<eMidnYYBW6WUaePMnZ2dnUVZ_rudnZ2d@supernews.com> (permalink)
Date	2013-04-29 17:28 -0500

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Bernd Paysan <bernd.paysan@gmx.de> wrote:
> Andrew Haley wrote:
>> But you don't need a metacompiler to recompile fig-FORTH: it's only
>> necessary to point the dictionary at high memory, compile all the
>> words, and then tie off the base of the dictionary chains.  Then,
>> point the dictionary back down at low memory and do the same thing
>> again.  The only real advantage to the assembler approach is that of
>> bootstrapping.
> 
> This approach allows only limited changes.  Suppose you had
> fig-Forth in the middle of the development process and you have
> still count+3 character headers like in Forth Inc.'s Forth.  Now you
> want to change that, and make count+all character headers.  What
> now?

You'd need first to define a smarter dictionary search and words to
create the new format.  I don't think you'd need to do anything else.
It's a hell of a lot easier than changing the headers in an assembly
code listing.

> Also, porting to another architecture isn't possible with this
> approach.

Well, yes.  To cross-compiler you need a cross-compiler.

Andrew.

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The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-27 09:13 +0000
  Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-27 22:46 -0700
    Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-28 03:37 -0500
      Re: The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-28 12:58 +0000
        Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-28 17:00 -0500
          Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-28 18:26 -0700
            Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-29 03:28 -0500
              Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-29 01:38 -0700
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-29 01:43 -0700
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-29 04:01 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-05-10 21:20 -0700
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-05-11 02:03 -0500
                Re: The most elegant Forth interpreter. David Schultz <abuse@127.0.0.1> - 2013-05-11 11:01 -0500
                Re: The most elegant Forth interpreter. David Schultz <abuse@127.0.0.1> - 2013-05-11 15:53 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-05-11 20:59 -0700
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-05-12 02:40 -0500
                Re: The most elegant Forth interpreter. David Schultz <abuse@127.0.0.1> - 2013-05-12 07:53 -0500
              Re: The most elegant Forth interpreter. "Elizabeth D. Rather" <erather@forth.com> - 2013-04-29 08:07 -1000
                Re: The most elegant Forth interpreter. Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-29 20:55 +0200
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-29 16:28 -0500
                Re: The most elegant Forth interpreter. Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-29 23:35 +0200
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-29 17:28 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-29 23:20 -0700
                Re: The most elegant Forth interpreter. "Elizabeth D. Rather" <erather@forth.com> - 2013-04-29 21:11 -1000
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-30 03:21 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-30 01:57 -0700
                Re: The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-30 09:00 +0000
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-30 02:10 -0700
                Re: The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-30 14:34 +0000
                Re: The most elegant Forth interpreter. Coos Haak <chforth@hccnet.nl> - 2013-04-30 17:18 +0200
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-30 10:04 -0700
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-30 04:13 -0500
                Re: The most elegant Forth interpreter. Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-30 18:40 +0200
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-30 12:50 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-05-03 22:01 -0700
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-30 04:09 -0500
                Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-05-06 19:29 -0700
                Re: The most elegant Forth interpreter. Elizabeth D Rather <erather@forth.com> - 2013-04-29 12:35 -1000
                Re: The most elegant Forth interpreter. Bernd Paysan <bernd.paysan@gmx.de> - 2013-04-30 01:50 +0200
                Re: The most elegant Forth interpreter. "Elizabeth D. Rather" <erather@forth.com> - 2013-04-29 13:55 -1000
                Re: The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-30 09:03 +0000
            Re: The most elegant Forth interpreter. albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-04-29 10:32 +0000
              Re: The most elegant Forth interpreter. Paul Rubin <no.email@nospam.invalid> - 2013-04-29 08:34 -0700
                Re: The most elegant Forth interpreter. "Rod Pemberton" <do_not_have@notemailnotq.cpm> - 2013-04-29 17:31 -0400
                Re: The most elegant Forth interpreter. Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-04-29 17:56 -0500
              Re: The most elegant Forth interpreter. lynx <rinkasu@kaze.void.null> - 2013-04-29 22:38 +0000
    Re: The most elegant Forth interpreter. "Ed" <invalid@nospam.com> - 2013-04-29 12:31 +1000
      Re: The most elegant Forth interpreter. Spam@ControlQ.com - 2013-04-29 13:31 -0400
  Re: The most elegant Forth interpreter. jlarsonfour3@gmail.com - 2013-04-29 08:14 -0700
  Re: The most elegant Forth interpreter. the_gavino_himself <visphatesjava@gmail.com> - 2013-04-29 10:28 -0700

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