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Re: Recognizer proposal

From jkn <jkn+nin@nicorp.co.uk>
Newsgroups comp.lang.forth
Subject Re: Recognizer proposal
Date 2026-02-11 20:49 +0000
Message-ID <mv48ajF9t6hU2@mid.individual.net> (permalink)
References (1 earlier) <nnd$1c958fc8$24a55a72@293ae8f8b50e0c83> <mv19avFqi4mU1@mid.individual.net> <698bcb8b$1@news.ausics.net> <mv2v1vFqfu2U1@mid.individual.net> <nnd$6697318a$1bc526dc@ff3ef15f121536ce>

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On 11/02/2026 12:36, Hans Bezemer wrote:
> On 11-02-2026 10:05, jkn wrote:
>> On 11/02/2026 00:21, dxf wrote:
>>> On 11/02/2026 4:48 am, jkn wrote:
>>>> ...
>>>> I have no skin in this game at all - I am basically an observer of 
>>>> both the language,
>>>> and this newsgroup. But it seems strange to me that in a language 
>>>> that is so
>>>> self-describedly flexible as Forth, the operation of the inner 
>>>> interpreter should
>>>> not itself be open to flexibility.
>>>
>>> IIRC recognizers was a c.l.f invention.  Each forth, it was noted, 
>>> had its own way
>>> of integrating floating-point into the system - fp being an 'optional 
>>> extension'
>>> of Forth-94.  Typically integration was achieved through hooks the 
>>> system designer
>>> had purposely built into system.  Forth-94 had already defined how 
>>> the forth
>>> interpreter should handle fp numbers.  Parsing words F# etc were not 
>>> an option.
>>>
>>> WIBN (wouldn't it be nice) it was argued if these hooks into the 
>>> interpreter could
>>> be made portable.  It caught the imagination of sufficient users (in 
>>> forth there's
>>> little distinction between user and system-designer) and the rest is 
>>> history.
>>> Recognizers were sufficiently complicated prompting more 
>>> justification than fp (1)
>>> in order to sell it.  It was 'a solution in search of a problem'. 
>>> From that came
>>> the idea that forth should be able to parse *anything* - however 
>>> unlikely or little
>>> used.
>>>
>>> (1) While fp integration prompted recognizers, recognizers were never 
>>> a complete
>>> solution.  Integrating fp into a system often requires more than 
>>> simply making the
>>> interpreter recognize fp numbers.  System-specific hooks remain.
>>>
>>
>>  > From that came
>>  > the idea that forth should be able to parse *anything* - however 
>>  >unlikely or little
>>  > used.
>>
>> I was a bit surprised that "a space delimits 'symbols'" has not been 
>> made more flexible...
>>
> 
> IMHO it has. PARSE allows you to parse for any delimiter. Some have 
> PARSE-WORD that allows skipping leading delimiters. There is also a 
> dedicated white-space parser called PARSE-NAME.

I was basing my comment from the wording of the proposal Anton linked to:

"""
The recognizer proposal is a factorization of the central part of the 
text interpreter.

As before the text interpreter parses a white-space-delimited string. ...
"""

> 
> 4tH has a word called OMIT which only skips leading delimiters without 
> parsing anything.
> 
> Hans Bezemer

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Thread

Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-09 07:49 +0000
  Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-10 13:36 +0100
    Re: Recognizer proposal jkn <jkn+nin@nicorp.co.uk> - 2026-02-10 17:48 +0000
      Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-11 11:21 +1100
        Re: Recognizer proposal jkn <jkn+nin@nicorp.co.uk> - 2026-02-11 09:05 +0000
          Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-11 12:46 +0100
          Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-11 13:36 +0100
            Re: Recognizer proposal jkn <jkn+nin@nicorp.co.uk> - 2026-02-11 20:49 +0000
          Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-11 18:37 +0000
            Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-13 12:25 +0100
        Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-11 14:34 +0100
          Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-12 11:35 +1100
            Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-12 07:24 +0000
              Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-12 10:59 +0100
                Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-12 10:13 +0000
                Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-13 13:22 +0100
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-13 13:07 +0100
              Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-12 20:59 +1100
            Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-13 12:35 +0100
              Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-13 13:30 +0100
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-13 13:44 +0100
          Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-12 07:35 +0000
            Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-12 10:55 +0100
              Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-13 08:27 +0000
                Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-13 13:43 +0100
                Re: Recognizer proposal Gerry Jackson <do-not-use@swldwa.uk> - 2026-02-13 23:50 +0000
                Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-14 12:53 +1100
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-15 13:33 +0100
                Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-16 12:18 +1100
                Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-19 13:42 +0100
                Evolution of Forths  was Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-19 14:38 +0100
                Re: Evolution of Forths was Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-20 12:33 +1100
                Re: Evolution of Forths was Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-20 11:58 +0100
                Re: Evolution of Forths was Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-24 10:45 +1100
                Re: Evolution of Forths was Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-21 16:35 +0100
                Re: Evolution of Forths was Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-24 13:13 +1100
          Re: Recognizer proposal Paul Rubin <no.email@nospam.invalid> - 2026-02-25 20:25 -0800
            Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-26 06:53 +0000
            Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-26 13:09 +0100
              Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-27 20:24 +1100
              Re: Recognizer proposal Gerry Jackson <do-not-use@swldwa.uk> - 2026-02-27 09:25 +0000
                Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-27 14:48 +0000
              Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-27 19:21 +0100
                Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-28 10:15 +1100
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-28 15:34 +0100
                Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-28 17:56 +0100
                Re: Recognizer proposal Paul Rubin <no.email@nospam.invalid> - 2026-02-28 22:45 -0800
                Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-03-01 07:54 +0000
                Re: Recognizer proposal Paul Rubin <no.email@nospam.invalid> - 2026-03-01 14:17 -0800
                Re: Recognizer proposal antispam@fricas.org (Waldek Hebisch) - 2026-03-02 00:21 +0000
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-03-02 12:36 +0100
                Re: Recognizer proposal Paul Rubin <no.email@nospam.invalid> - 2026-03-04 16:48 -0800
                Re: Recognizer proposal antispam@fricas.org (Waldek Hebisch) - 2026-03-02 00:17 +0000
            Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-02-26 07:32 -0600
            Re: Recognizer proposal Stephen Pelc <stephen@vfxforth.com> - 2026-03-02 13:23 +0000
              Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-03-03 13:47 +0100
                Re: Recognizer proposal Stephen Pelc <stephen@vfxforth.com> - 2026-03-03 14:39 +0000
                Re: Recognizer proposal Paul Rubin <no.email@nospam.invalid> - 2026-03-04 16:52 -0800
                Re: Recognizer proposal Stephen Pelc <stephen@vfxforth.com> - 2026-03-06 10:54 +0000
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-03-06 12:22 +0100
                Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-03-07 17:58 +0100
              Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-03-03 18:33 +0100
      Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-11 13:54 +0100
        Re: Recognizer proposal jkn <jkn+nin@nicorp.co.uk> - 2026-02-11 13:09 +0000
          Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-11 15:59 +0100
            Re: Recognizer proposal jkn <jkn+nin@nicorp.co.uk> - 2026-02-11 20:46 +0000
        Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-11 16:30 +0000
          Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-12 12:07 +0100
            Re: Recognizer proposal Lars Brinkhoff <lars.spam@nocrew.org> - 2026-02-12 13:00 +0000
            Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-12 12:55 +0000
              Re: Recognizer proposal Hans Bezemer <the.beez.speaks@gmail.com> - 2026-02-13 14:17 +0100
            Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-13 13:28 +0100
              Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-14 01:23 +1100
            Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-02-16 22:07 -0600
              Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-17 21:25 +1100
                Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-02-17 08:16 -0600
                Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-21 15:32 +0000
              Re: Recognizer proposal Stephen Pelc <stephen@vfxforth.com> - 2026-02-17 14:13 +0000
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-17 20:21 +0100
                Re: Recognizer proposal dxf <dxforth@gmail.com> - 2026-02-18 13:08 +1100
    Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-11 12:29 +0100
  Re: Recognizer proposal minforth <minforth@gmx.net> - 2026-02-18 11:14 +0100
    Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-21 15:40 +0000
      Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-02-24 02:43 -0600
        Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-03-08 18:15 -0500
          Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-03-09 07:49 +0000
            Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-03-09 10:37 +0100
              Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-03-10 07:35 +0000
                Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-03-10 12:06 +0100
                Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-03-11 09:48 -0500
            Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-03-09 16:48 -0500
              Re: Recognizer proposal Krishna Myneni <krishna.myneni@ccreweb.org> - 2026-03-11 09:45 -0500
  Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-18 12:33 +0100
    Re: Recognizer proposal anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2026-02-21 15:48 +0000
      Re: Recognizer proposal albert@spenarnc.xs4all.nl - 2026-02-25 14:11 +0100
  Re: Recognizer proposal NN <november.nihal@gmail.com> - 2026-03-19 19:23 +0000
    Re: Recognizer proposal thresh3@fastmail.com (Lev) - 2026-03-19 23:13 +0000

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