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Re: Recognizers discussion

From Bernd Paysan <bernd@net2o.de>
Newsgroups comp.lang.forth
Subject Re: Recognizers discussion
Date 2017-05-07 22:42 +0000
Organization A noiseless patient Spider
Message-ID <oeo7ru$3p2$1@dont-email.me> (permalink)
References (8 earlier) <qqWdnRvCDcNAf5TEnZ2dnUU7-VudnZ2d@supernews.com> <2017May4.181413@mips.complang.tuwien.ac.at> <N8SdnSyDg4gE8ZbEnZ2dnUU7-LHNnZ2d@supernews.com> <oej1s0$j6c$1@dont-email.me> <BdKdne_S8sfXfJPEnZ2dnUU7-bednZ2d@supernews.com>

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Am Sun, 07 May 2017 03:56:42 -0500 schrieb Andrew Haley:
> If the method doesn't beling to the class you'll get an exception.

Only if you do run-time checking... And we are Forthers, we don't do run-
time checking.

So in a vtable-based approach if the method is not defined in the class, 
because it belongs to a completely different class, and there's a method 
defined in that slot in the vtable, this method is called.

It might or might not lead to an exception.

It's just like when you access a member variable that is not part of the 
object, it will access some memory, either within or beyond the object.

That's why people like to use vocabularies to make sure only those 
methods and fields are visible that make actually sense in that context.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
net2o ID: kQusJzA;7*?t=uy@X}1GWr!+0qqp_Cn176t4(dQ*
http://bernd-paysan.de/

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Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 15:27 +0100
  Recognizers discussion lehs <skydda.barnen@gmail.com> - 2017-05-02 07:52 -0700
    Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-02 08:19 -0700
      Re: Recognizers discussion lehs <skydda.barnen@gmail.com> - 2017-05-02 08:27 -0700
    Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 19:55 +0100
      Re: Recognizers discussion lehs <skydda.barnen@gmail.com> - 2017-05-03 02:38 -0700
        Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-04 15:16 +0000
  Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 17:05 +0100
    Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 17:23 +0100
      Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 17:26 +0100
      Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-02 13:03 -0500
        Re: Recognizers discussion Matthias Trute <matthias.trute@gmail.com> - 2017-05-02 12:44 -0700
          Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 04:36 -0500
        Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-04 13:28 +0000
          Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 09:13 -0500
  Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-02 12:35 -0500
    Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 18:53 +0100
      Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-02 13:10 -0500
        Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-02 19:22 +0100
        Re: Recognizers discussion Bernd Paysan <bernd@net2o.de> - 2017-05-02 22:53 +0000
          Re: Recognizers discussion Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2017-05-03 07:39 +0100
            Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-03 10:58 +0100
            Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-04 13:53 +0000
            Re: Recognizers discussion Bernd Paysan <bernd@net2o.de> - 2017-05-06 01:21 +0000
            Re: Recognizers discussion pahihu <pahihu@gmail.com> - 2017-05-06 00:22 -0700
              Re: Recognizers discussion Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2017-05-06 23:05 +0100
                Re: Recognizers discussion pahihu <pahihu@gmail.com> - 2017-05-06 22:36 -0700
          Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 04:38 -0500
            Re: Recognizers discussion minforth@arcor.de - 2017-05-03 04:49 -0700
              Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 05:03 -0700
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 09:02 -0500
                Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 07:45 -0700
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 11:24 -0500
                Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 09:45 -0700
                Re: Recognizers discussion Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-05-03 10:08 -0700
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-09 15:56 +0000
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-03 18:37 +0100
                Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 11:07 -0700
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-03 20:55 +0100
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 02:47 -0500
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 13:07 +0100
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 07:59 -0500
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 17:38 +0100
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 12:42 -0500
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 02:43 -0500
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 13:05 +0100
                Re: Recognizers discussion Ron Aaron <rambamist@gmail.com> - 2017-05-04 15:10 +0300
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 13:25 +0100
                Re: Recognizers discussion Ron Aaron <rambamist@gmail.com> - 2017-05-04 15:33 +0300
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 08:05 -0500
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-09 15:54 +0000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-09 11:10 -0500
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-10 11:49 +0000
                Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-04 16:14 +0000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 13:02 -0500
                Re: Recognizers discussion Bernd Paysan <bernd@net2o.de> - 2017-05-05 23:29 +0000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-07 03:56 -0500
                Re: Recognizers discussion Bernd Paysan <bernd@net2o.de> - 2017-05-07 22:42 +0000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-08 04:08 -0500
                Re: Recognizers discussion Julian Fondren <julian.fondren@gmail.com> - 2017-05-03 08:51 -0700
                Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 09:38 -0700
                Re: Recognizers discussion Julian Fondren <julian.fondren@gmail.com> - 2017-05-03 09:59 -0700
                Re: Recognizers discussion Mark Wills <markwills1970@gmail.com> - 2017-05-03 10:16 -0700
                Re: Recognizers discussion albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-03 22:04 +0200
                Re: Recognizers discussion minforth@arcor.de - 2017-05-03 22:09 -0700
                Re: Recognizers discussion Joel Rees <joel.rees@gmail.com> - 2017-05-07 19:50 -0700
                Re: Recognizers discussion "Elizabeth D. Rather" <erather@forth.com> - 2017-05-07 21:33 -1000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-08 04:12 -0500
                Re: Recognizers discussion Joel Rees <joel.rees@gmail.com> - 2017-05-08 20:21 -0700
                FP stack (was: Recognizers discussion) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-08 12:35 +0000
                Re: FP stack (was: Recognizers discussion) Joel Rees <joel.rees@gmail.com> - 2017-05-08 20:50 -0700
                Re: FP stack Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-09 03:39 -0500
                Re: FP stack Joel Rees <joel.rees@gmail.com> - 2017-05-09 20:59 -0700
                Re: FP stack Julian Fondren <julian.fondren@gmail.com> - 2017-05-10 00:03 -0700
                Re: FP stack Alex <alex@rivadpm.com> - 2017-05-10 08:10 +0100
                Re: FP stack "Elizabeth D. Rather" <erather@forth.com> - 2017-05-09 21:24 -1000
                Re: FP stack Julian Fondren <julian.fondren@gmail.com> - 2017-05-10 00:37 -0700
                Re: FP stack "Elizabeth D. Rather" <erather@forth.com> - 2017-05-09 22:53 -1000
                Re: FP stack Alex <alex@rivadpm.com> - 2017-05-10 08:53 +0100
                Re: FP stack Ron Aaron <rambamist@gmail.com> - 2017-05-10 11:00 +0300
                Re: FP stack Paul Rubin <no.email@nospam.invalid> - 2017-05-10 01:02 -0700
                Re: FP stack Ron Aaron <rambamist@gmail.com> - 2017-05-10 11:06 +0300
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-10 09:58 +0000
                Re: FP stack Ron Aaron <rambamist@gmail.com> - 2017-05-10 14:17 +0300
                Re: FP stack Alex <alex@rivadpm.com> - 2017-05-10 13:09 +0100
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-10 15:05 +0000
                Re: FP stack albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-10 11:43 +0200
                Re: FP stack "HAA" <someone@microsoft.com> - 2017-05-10 18:34 +1000
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-10 09:45 +0000
                Re: FP stack "HAA" <someone@microsoft.com> - 2017-05-11 19:13 +1000
                Re: FP stack Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-11 04:50 -0500
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-11 16:18 +0000
                Re: FP stack Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-11 12:12 -0500
                Re: FP stack stephen@mpeforth.com (Stephen Pelc) - 2017-05-11 13:53 +0000
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-11 15:43 +0000
                Re: FP stack Joel Rees <joel.rees@gmail.com> - 2017-05-12 08:48 -0700
                Re: FP stack anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-11 16:31 +0000
                Re: FP stack "Elizabeth D. Rather" <erather@forth.com> - 2017-05-11 10:18 -1000
                Re: FP stack Cecil Bayona <cbayona@cbayona.com> - 2017-05-11 15:37 -0500
                Re: FP stack "Elizabeth D. Rather" <erather@forth.com> - 2017-05-11 17:25 -1000
                Re: FP stack Cecil Bayona <cbayona@cbayona.com> - 2017-05-11 22:55 -0500
                Re: FP stack "HAA" <someone@microsoft.com> - 2017-05-13 14:24 +1000
                Re: FP stack albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-13 13:44 +0200
                Re: FP stack Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-10 05:58 -0500
                Re: FP stack (was: Recognizers discussion) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-09 13:50 +0000
                Re: FP stack (was: Recognizers discussion) Joel Rees <joel.rees@gmail.com> - 2017-05-10 00:25 -0700
                Re: FP stack (was: Recognizers discussion) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-10 11:39 +0000
                Re: FP stack (was: Recognizers discussion) Joel Rees <joel.rees@gmail.com> - 2017-05-10 11:49 -0700
                Re: FP stack (was: Recognizers discussion) "HAA" <someone@microsoft.com> - 2017-05-09 21:15 +1000
                Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-09 14:16 +1000
              Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 08:57 -0500
                Re: Recognizers discussion minforth@arcor.de - 2017-05-03 07:54 -0700
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-03 11:30 -0500
                Re: Recognizers discussion Cecil Bayona <cbayona@cbayona.com> - 2017-05-03 14:05 -0500
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-03 18:42 +0100
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 02:51 -0500
                Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-04 22:29 +1000
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 13:41 +0100
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-04 09:06 -0500
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-15 12:22 +0000
                Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-15 07:36 -0500
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-18 21:21 +0000
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-18 21:24 +0000
                Re: Recognizers discussion albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-04 20:17 +0200
                Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-05 11:03 +1000
                Re: Recognizers discussion minforth@arcor.de - 2017-05-05 00:16 -0700
                Re: Recognizers discussion JUERGEN <epldfpga@aol.com> - 2017-05-05 13:15 -0700
                Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-06 16:49 +1000
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-05 21:00 +0100
      Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-09 14:17 +0000
        Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-09 15:46 +0100
          Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-10 11:50 +0000
            Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-10 13:11 +0100
              Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-10 13:49 +0000
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-10 15:57 +0100
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-12 14:17 +0000
  Re: Recognizers discussion "Elizabeth D. Rather" <erather@forth.com> - 2017-05-02 09:25 -1000
    Re: Recognizers discussion albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-03 01:19 +0200
    Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-05 15:50 +0000
      Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-08 11:43 +1000
        Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-08 19:17 +0000
          Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-09 14:25 +0000
            Re: Recognizers discussion "Elizabeth D. Rather" <erather@forth.com> - 2017-05-09 21:22 -1000
              Re: Recognizers discussion "HAA" <someone@microsoft.com> - 2017-05-13 13:33 +1000
                Re: Recognizers discussion "Elizabeth D. Rather" <erather@forth.com> - 2017-05-12 21:32 -1000
                Re: Recognizers discussion Howerd <howerdo@yahoo.co.uk> - 2017-05-13 07:12 -0700
                Re: Recognizers discussion "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-05-13 14:30 +0000
  Re: Recognizers discussion rickman <gnuarm@gmail.com> - 2017-05-04 11:37 -0400
    Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-04 17:51 +0100
      Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-05 07:31 +0000
        Re: Recognizers discussion Lars Brinkhoff <lars.spam@nocrew.org> - 2017-05-05 20:35 +0200
          Re: Recognizers discussion minforth@arcor.de - 2017-05-05 12:27 -0700
          Re: Recognizers discussion Cecil Bayona <cbayona@cbayona.com> - 2017-05-05 15:03 -0500
          Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-06 16:26 +0000
            Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-06 18:17 +0100
              Re: Recognizers discussion Brad Eckert <hwfwguy@gmail.com> - 2017-05-06 12:26 -0700
                Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-06 21:39 +0100
            Re: Recognizers discussion Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-07 03:58 -0500
              Re: Recognizers discussion Alex <alex@rivadpm.com> - 2017-05-07 10:39 +0100
                Re: Recognizers discussion Bernd Paysan <bernd@net2o.de> - 2017-05-07 23:39 +0000
                Re: Recognizers discussion Paul Rubin <no.email@nospam.invalid> - 2017-05-07 17:38 -0700
                Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-08 13:40 +0000
                Re: Recognizers discussion anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-08 13:25 +0000
                Re: Recognizers discussion Lars Brinkhoff <lars.spam@nocrew.org> - 2017-05-08 16:25 +0200
              Flash (was: Recognizers discussion) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-07 10:51 +0000
                Re: Flash Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-05-07 08:06 -0500
                Re: Flash anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-07 13:57 +0000
                Re: Flash Lars Brinkhoff <lars.spam@nocrew.org> - 2017-05-07 16:46 +0200
                Re: Flash Alex <alex@rivadpm.com> - 2017-05-07 16:31 +0100
                Re: Flash anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-07 17:16 +0000
                Re: Flash Alex <alex@rivadpm.com> - 2017-05-07 19:18 +0100
                Re: Flash albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-05-07 21:45 +0200
                Re: Flash Matthias Trute <matthias.trute@gmail.com> - 2017-05-07 12:54 -0700
                Re: Flash Alex <alex@rivadpm.com> - 2017-05-07 19:33 +0100
                Re: Flash Raimond Dragomir <raimond.dragomir@gmail.com> - 2017-05-07 08:50 -0700
                Re: Flash anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-05-07 17:21 +0000
    Re: Recognizers discussion Matthias Trute <matthias.trute@gmail.com> - 2017-05-04 10:07 -0700

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