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Re: mixed double and single signed division

From "HAA" <someone@microsoft.com>
Newsgroups comp.lang.forth
Subject Re: mixed double and single signed division
Date 2017-04-28 22:41 +1000
Organization Aioe.org NNTP Server
Message-ID <odvda3$fom$1@gioia.aioe.org> (permalink)
References <bbcfd72a-4597-4839-aba0-3d4b98009995@googlegroups.com><odh5gb$1j9o$1@gioia.aioe.org><zY2dneeIGsT8u2HFnZ2dnUU7-V-dnZ2d@supernews.com><f8a33236-78f6-462e-9bc1-67e2ca5c92b7@googlegroups.com><2017Apr24.151206@mips.complang.tuwien.ac.at><57830405-b5fe-4bf5-88dd-88a3838f1341@googlegroups.com><2017Apr25.104007@mips.complang.tuwien.ac.at><cd8cf26a-7424-4333-8023-f112c2ac7373@googlegroups.com><2017Apr25.133713@mips.complang.tuwien.ac.at><0a0681ea-69b9-41b1-82ea-dce5ec286f96@googlegroups.com><odrqha$g1a$1@gioia.aioe.org><84204206-3c1a-4d5c-9162-550417629792@googlegroups.com> <7r2dnQzbQrqTTJ_EnZ2dnUU7-SfNnZ2d@supernews.com>

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Elizabeth D. Rather wrote:
> On 4/27/17 1:00 PM, krishna.myneni@ccreweb.org wrote:
> > On Wednesday, April 26, 2017 at 11:02:53 PM UTC-5, HAA wrote:
> > ...
> >> Where I do occasionally slip up and appreciate a warning is syntax e.g. forgetting
> >> a THEN because I'd been too busy getting the run-time code right.  Early forth
> >> systems had no compile-time checking and programmers still survived.  Perhaps
> >> I could too.
> >
> > From the earliest days of my Forth system, I had checks for incomplete flow control
> > structures, with explicit error messages, e.g. for a DO without a matching LOOP, etc.
> > I have found those messages to be enormous time savers. I've been programming for
> > over three decades, in multiple languages/computing environments. Can I debug a
> > program without such explicit feedback? Probably. But it's sure a heck of a lot
> > easier when the system gives me accurate information about compiling and run-time
> > errors.
>
> The easiest way to check for an incomplete structure is just to type .
> after compiling anything. If you've left off a structure ending, the
> address to be patched will be left on the stack. Easy!
>
> Cheers,
> Elizabeth

The concern with a completely unsecured compiler is risk of a syntax error
resulting in a corrupted system (Swiss cheese effect).  For that reason some
built-in test/verification would seem advisable.

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mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-22 08:21 -0700
  Re: mixed double and single signed division NN <november.nihal@gmail.com> - 2017-04-22 09:14 -0700
    Re: mixed double and single signed division NN <november.nihal@gmail.com> - 2017-04-22 09:22 -0700
      Re: mixed double and single signed division Coos Haak <htrofhc@gmail.com> - 2017-04-22 23:31 +0200
        Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 06:44 -0700
          Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 13:24 -0700
      Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 06:41 -0700
        Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 13:29 -0700
  Re: mixed double and single signed division Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-22 11:40 -0500
    Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 06:52 -0700
  Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-23 13:02 +1000
    Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-22 17:58 -1000
      Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 13:36 -0700
        Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 16:33 -0700
          Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-24 13:23 +0000
            Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-24 18:49 -0700
        Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-24 13:12 +0000
          Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-24 18:35 -0700
            Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-24 15:52 -1000
              Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 02:18 -0700
              Re: mixed double and single signed division Paul Rubin <no.email@nospam.invalid> - 2017-04-25 02:25 -0700
                Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-25 11:30 +0000
                Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-25 08:08 -1000
                Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-26 14:48 +0000
            Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-25 08:40 +0000
              Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 02:25 -0700
                Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 03:00 -0700
                Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-25 11:37 +0000
                Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 05:27 -0700
                Re: mixed double and single signed division anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-25 13:34 +0000
                Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 15:29 -0700
                Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-27 14:02 +1000
                Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-27 16:00 -0700
                Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-27 19:20 -1000
                Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-28 22:41 +1000
            Re: mixed double and single signed division Coos Haak <htrofhc@gmail.com> - 2017-04-25 15:32 +0200
              Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-25 15:22 -0700
    Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 06:55 -0700
      Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 13:30 -1000
        Re: mixed double and single signed division krishna.myneni@ccreweb.org - 2017-04-23 16:45 -0700
        Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-24 10:56 +1000
          Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 15:06 -1000
            Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 19:10 -0700
            Re: mixed double and single signed division Paul Rubin <no.email@nospam.invalid> - 2017-04-23 19:12 -0700
              Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 16:31 -1000
                Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 21:17 -0700
                Re: mixed double and single signed division Paul Rubin <no.email@nospam.invalid> - 2017-04-23 21:47 -0700
                Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 22:58 -0700
                Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 23:22 -0700
                Re: mixed double and single signed division Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-24 04:46 -0500
            Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-24 12:59 +1000
              Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-23 18:03 -1000
                Re: mixed double and single signed division hughaguilar96@gmail.com - 2017-04-23 21:22 -0700
                Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-25 12:53 +1000
                Re: mixed double and single signed division "Elizabeth D. Rather" <erather@forth.com> - 2017-04-24 21:55 -1000
                Re: mixed double and single signed division "HAA" <someone@microsoft.com> - 2017-04-25 20:00 +1000

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