Re: Simple Strings

From	Bernd Paysan <bernd.paysan@gmx.de>
Newsgroups	comp.lang.forth
Subject	Re: Simple Strings
Date	2013-10-12 16:12 +0200
Organization	1&1 Internet AG
Message-ID	<l3blcn$uv1$1@online.de> (permalink)
References	<1a6e0022-1dce-4957-bd91-5b4e8a4acc1c@googlegroups.com> <l39i53$7p9$1@online.de> <f38ccf82-933d-4440-b002-ce271c0eba96@googlegroups.com>

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hughaguilar96@yahoo.com wrote:

> On Friday, October 11, 2013 12:05:07 PM UTC-7, Bernd Paysan wrote:
>> ... we now have quotations, which make handling
>> this statefull stuff easier (what to do in case of an exception?).
> 
> We now have quotations??? Since when? That is not possible under
> ANS-Forth.

We have quotations, we don't have closures.  They are easy to implement with 
a bit of carnal knowledge, and we can make them standard (so far, nobody has 
proposed an RfD).  The term comes from Factor.  I think it's unique to stack 
languages, because the typical way to deploy quotations is that they can use 
the entire stack, including for keeping state.  Example:

: count-words ( wid -- n )  0 [: drop 1+ true ;] rot traverse-wordlist ;

Closures can only keep an internal state, but they can't return that state.  
So for all those implicit loops like traverse-wordlist, you do all the stuff 
you can do with a closure with quotations, without the need for garbage 
collection, and with the added goodie that your loop can return additional 
results.

There are implementations of quotations for VFX, for SwiftForth, for Gforth 
and bigForth... and we actually should write an RfD to add them to the 
standard.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

Thread

Simple Strings JennyB <jennybrien@googlemail.com> - 2013-10-11 10:42 -0700
  Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 21:05 +0200
    Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-11 15:49 -0700
      Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-11 16:21 -0700
        Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-11 16:28 -0700
        Re: Simple Strings mhx@iae.nl - 2013-10-12 01:03 -0700
        Re: Simple Strings albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-10-24 12:04 +0000
          Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-25 02:32 -0700
            Re: Simple Strings albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-10-25 11:43 +0000
              Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-25 06:03 -0700
    Re: Simple Strings hughaguilar96@yahoo.com - 2013-10-11 21:26 -0700
      Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-11 23:33 -0700
        Re: Simple Strings "WJ" <w_a_x_man@yahoo.com> - 2013-10-12 18:40 +0000
      Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-12 05:40 -0500
        Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-12 04:36 -0700
          Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-12 08:56 -0500
            Re: Simple Strings Howerd <howerdo@yahoo.co.uk> - 2013-10-12 14:04 -0700
              Re: Simple Strings Coos Haak <chforth@hccnet.nl> - 2013-10-13 01:04 +0200
                Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-13 03:25 +0200
              Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-13 02:01 -0500
              Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-14 17:24 +0000
            Re: Simple Strings "Elizabeth D. Rather" <erather@forth.com> - 2013-10-12 11:40 -1000
              Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-13 00:53 +0200
              Re: Simple Strings hughaguilar96@yahoo.com - 2013-10-12 22:13 -0700
              Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-13 02:16 -0500
                Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-15 14:57 +0000
                Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-15 19:45 +0200
              Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-14 17:27 +0000
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 20:14 +0100
                Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-15 16:06 +0000
            Re: Simple Strings Paul Rubin <no.email@nospam.invalid> - 2013-10-13 20:58 -0700
              Re: Simple Strings m.a.m.hendrix@tue.nl - 2013-10-14 00:00 -0700
              Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 03:18 -0500
                Re: Simple Strings Paul Rubin <no.email@nospam.invalid> - 2013-10-14 01:49 -0700
                Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 04:29 -0500
                Re: Simple Strings m.a.m.hendrix@tue.nl - 2013-10-14 03:01 -0700
                Re: Simple Strings Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-10-14 15:09 +0200
                Re: Simple Strings Paul Rubin <no.email@nospam.invalid> - 2013-10-14 03:26 -0700
                Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 09:21 -0500
                Re: Simple Strings Graham Smith <"s\" xyzgrahams@tectime.com\" 3 /string"> - 2013-10-14 17:49 +0100
                Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 12:53 -0500
                Re: Simple Strings "Elizabeth D. Rather" <erather@forth.com> - 2013-10-14 09:26 -1000
                Re: Simple Strings albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-10-28 18:19 +0000
              Re: Simple Strings Roelf Toxopeus <rt4all@notthis.hetnet.nl> - 2013-10-14 11:02 +0200
              Re: Simple Strings Marc Olschok <nobody@nowhere.invalid> - 2013-10-15 14:43 +0000
                Re: Simple Strings albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-10-15 15:59 +0000
                Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-16 12:12 +0000
                Re: Simple Strings albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-10-17 11:52 +0000
          Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-12 16:55 +0100
      Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-12 16:12 +0200
        Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-12 16:50 +0100
          Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 09:41 +0100
            Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-14 13:10 +0100
              Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 13:46 +0100
                Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 09:23 -0500
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 17:38 +0100
                Re: Simple Strings Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 12:56 -0500
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 20:33 +0100
                Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-14 21:50 +0100
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 22:29 +0100
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-14 22:31 +0100
                Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-14 22:46 +0100
              Re: Simple Strings Lars Brinkhoff <lars.spam@nocrew.org> - 2013-10-15 08:00 +0200
                Re: Simple Strings Lars Brinkhoff <lars.spam@nocrew.org> - 2013-10-15 13:20 +0200
                Re: Simple Strings Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-10-15 13:36 +0100
                Re: Simple Strings Lars Brinkhoff <lars.spam@nocrew.org> - 2013-10-16 12:11 +0200
                Re: Simple Strings Coos Haak <chforth@hccnet.nl> - 2013-10-16 17:36 +0200
                Re: Simple Strings "Alex McDonald" <blog@rivadpm.com> - 2013-10-16 17:01 +0100
                Re: Simple Strings Lars Brinkhoff <lars.spam@nocrew.org> - 2013-10-16 20:52 +0200
  Re: Simple Strings "Clyde W. Phillips Jr." <cwpjr02@gmail.com> - 2013-10-12 22:49 -0700
    Re: Simple Strings hughaguilar96@yahoo.com - 2013-10-13 10:31 -0700
  Re: Simple Strings hughaguilar96@yahoo.com - 2013-10-13 10:30 -0700
  Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-14 16:26 +0000
    Re: Simple Strings JennyB <jennybrien@googlemail.com> - 2013-10-15 07:36 -0700
      Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-16 16:05 +0000
        Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-16 19:58 +0200
          Re: Simple Strings Brad Eckert <hwfwguy@gmail.com> - 2013-10-29 07:40 -0700
            Re: Simple Strings Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-29 17:10 +0100
              Re: Simple Strings Brad Eckert <hwfwguy@gmail.com> - 2013-10-29 16:39 -0700
            Re: Simple Strings anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-30 12:00 +0000

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