Re: [Random] Escape the trolls

From	anton@mips.complang.tuwien.ac.at (Anton Ertl)
Newsgroups	comp.lang.forth
Subject	Re: [Random] Escape the trolls
Date	2017-04-15 07:52 +0000
Organization	Institut fuer Computersprachen, Technische Universitaet Wien
Message-ID	<2017Apr15.095213@mips.complang.tuwien.ac.at> (permalink)
References	(4 earlier) <277cc39a-0df3-4458-9cea-b20e2307b6c9@googlegroups.com> <8196989c-d2dc-4b12-98c1-9e84ec2781e1@googlegroups.com> <56bd7816-4d6e-492a-830e-13eb5475a11a@googlegroups.com> <ocrm4l$ftb$1@dont-email.me> <9b5a1faa-dfa6-470e-8797-ce2e4f117e7d@googlegroups.com>

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hughaguilar96@gmail.com writes:
>1.) I read that Forth-200x description of S\" and found this bizarre restri=
>ction:
>"A program shall not alter the returned string."
>I don't know why they have that restriction, and I certainly don't.

: foo s\" bla" ;
'x foo drop c!
foo type

If programs were allowed to alter the returned string, what should the
output of TYPE be?  Is the returned string required to be in RAM?
Should it make a new copy every time it runs?  How long is that copy
guaranteed to live?

>2.) They also said this:
>"An ambiguous condition exists if a \ is placed before any character, other=
> than those defined in here."
>They sure do love the term "ambiguous condition." I just abort with an erro=
>r message, because this is an error.

That's certainly a good approach in an implementation.  However, if
Forth-2012 required it, and we wanted to add a new escape code in the
next standard, that would mean a system satisfying the next standard
would not be Forth-2012 compliant.  OTOH, maybe that is preferable to
the present approach where each system can do it's own extension
(e.g., treat upper-case escapes as if they were lower case), and when
we want to add a new escape code, we find that we cannot do it because
they all are already taken in some system and entrenched in code
written for that system (what happened with "{").

- anton
-- 
M. Anton Ertl  http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs: http://www.complang.tuwien.ac.at/forth/faq/toc.html
     New standard: http://www.forth200x.org/forth200x.html
   EuroForth 2016: http://www.euroforth.org/ef16/

Thread

[Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-13 22:46 -0700
  Re: [Random] Escape the trolls NN <november.nihal@gmail.com> - 2017-04-14 10:53 -0700
    Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 11:26 -0700
      Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-14 15:30 -0400
        Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 12:45 -0700
          Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-14 16:02 -0400
          Re: [Random] Escape the trolls NN <november.nihal@gmail.com> - 2017-04-14 13:13 -0700
            Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-14 16:18 -0400
              Re: [Random] Escape the trolls NN <november.nihal@gmail.com> - 2017-04-14 13:25 -0700
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-14 16:49 -0400
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-14 21:59 +0100
              Re: [Random] Escape the trolls josv@planet.nl - 2017-04-15 04:09 -0700
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 12:45 -0400
                Re: [Random] Escape the trolls Coos Haak <htrofhc@gmail.com> - 2017-04-15 18:50 +0200
                Re: [Random] Escape the trolls NN <november.nihal@gmail.com> - 2017-04-15 15:45 -0700
          Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-14 14:46 -0700
            Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 15:35 -0700
              Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-14 16:24 -0700
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 00:34 +0100
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 00:36 +0100
                Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-14 20:58 -0700
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 00:24 -0400
                Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-14 21:40 -0700
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 02:32 -0400
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-15 07:50 +0000
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-15 08:15 +0000
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 13:10 -0400
                Re: [Random] Escape the trolls Coos Haak <htrofhc@gmail.com> - 2017-04-15 19:27 +0200
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 14:25 -0400
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-17 14:05 +0000
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-16 01:42 +0000
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-15 21:51 -0400
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-16 02:10 +0000
                Re: [Random] Escape the trolls Coos Haak <htrofhc@gmail.com> - 2017-04-16 14:29 +0200
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-16 13:58 +0000
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-16 16:11 +0000
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-16 22:18 +0000
                Re: [Random] Escape the trolls Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2017-04-17 07:54 +0100
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-17 23:32 +0000
                Re: [Random] Escape the trolls "Rudy Velthuis" <newsgroups@rvelthuis.de> - 2017-04-17 23:33 +0000
                Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 22:33 -0700
                Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 22:52 -0700
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-15 07:52 +0000
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 11:20 +0100
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-15 11:53 +0000
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 19:10 +0100
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-17 14:19 +0000
                Re: [Random] Escape the trolls Bernd Linsel <bl1@gmx.com> - 2017-04-15 20:21 +0200
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 20:33 +0100
                Re: [Random] Escape the trolls Bernd Linsel <bl1@gmx.com> - 2017-04-16 11:50 +0200
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-16 14:22 +0000
                Re: [Random] Escape the trolls anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-16 14:47 +0000
                Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-15 16:55 -0700
                Re: [Random] Escape the trolls hughaguilar96@gmail.com - 2017-04-15 17:03 -0700
                Re: [Random] Escape the trolls Alex <alex@rivadpm.com> - 2017-04-15 11:37 +0100
                Re: [Random] Escape the trolls Julian Fondren <julian.fondren@gmail.com> - 2017-04-14 16:51 -0700
                Re: [Random] Escape the trolls rickman <gnuarm@gmail.com> - 2017-04-14 21:24 -0400

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