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Groups > comp.lang.forth > #55189
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: Is GForth KEY really ANS Forth standard? |
| Date | 2017-02-27 15:38 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2017Feb27.163840@mips.complang.tuwien.ac.at> (permalink) |
| References | <77617cde-2fa9-45f9-8b91-8c95e1a2416d@googlegroups.com> |
lehs <skydda.barnen@gmail.com> writes:
>The DPANS document says:
>
>"Receive one character char, a member of the implementation-defined character set. Keyboard events that do not correspond to such characters are discarded until a valid character is received, and those events are subsequently unavailable.
>
>All standard characters can be received. Characters received by KEY are not displayed."
>
>GForth KEY do not discard 'arrow up' but return 27 on the stack and emits '[A'. That might be good but is it really ANS Forth?
A Forth system that talks to a VT100-compatible terminal has no way to
know whether the user pressed Cursor-Up or the sequence <ESC>[A (well,
Gforth's EKEY tries to differentiate between these cases by timing,
but thanks to network lags and macro keyboards that is not a 100%
reliable way).
And indeed, looking at Gforth, SwiftForth, VFX Forth, and bigForth for
Linux, when I do
key . key . key . key .
and then press Cursor-up and then x, all of them output
27 91 65 120
I also tried SP-Forth 4.20 for Linux, but its KEY just returns 0
without waiting for a keypress; and EKEY just gives an error.
>Words like KEY and EMIT must be exactly the same on any system.
Apart from SP-Forth, the systems I tried behaved the same way.
> Else portability is an illusion.
No, behaving exactly the same is not necessary for portability. E.g.,
CELLS does not behave the same way on 32-bit and 64-bit systems, and
yet it is possible to write Forth programs that port between 32-bit
and 64-bit systems, the the different behaviour of CELLS is a key part
in that portability.
Concerning KEY, it is a word for getting the raw input, and there are
differences based on where the input is coming from (a terminal, a
keyboard, or some serial port).
For an editor, I would recommend working with EKEY, EKEY>CHAR,
EKEY>FKEY, and the K-... words; and always provide an alternative to
the special keys for cases where the keyboard does not have the
special keys, or they do not work as expected.
- 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/
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Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 01:51 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 02:35 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 02:46 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-27 17:38 +0000
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-27 14:12 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 04:42 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 08:58 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-27 14:15 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 11:51 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-27 15:17 -0500
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-28 09:02 +0000
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-28 19:15 -0500
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-03-01 02:23 +0100
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-28 20:57 -0500
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-03-01 13:24 +0100
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-01 14:23 -0500
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-01 08:50 +0000
Re: Is GForth KEY really ANS Forth standard? Cecil Bayona <cbayona@cbayona.com> - 2017-03-01 10:04 -0600
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-01 14:51 -0500
Re: Is GForth KEY really ANS Forth standard? Mark Wills <markwills1970@gmail.com> - 2017-03-01 13:00 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-02 15:34 +0000
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-01 18:09 +0000
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-01 14:55 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-01 21:28 -0800
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-01 22:23 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-02 00:21 -0800
Re: Is GForth KEY really ANS Forth standard? Paul Rubin <no.email@nospam.invalid> - 2017-03-02 01:01 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-02 01:30 -0800
Re: Is GForth KEY really ANS Forth standard? Paul Rubin <no.email@nospam.invalid> - 2017-03-02 01:46 -0800
Re: Is GForth KEY really ANS Forth standard? Mark Wills <markwills1970@gmail.com> - 2017-03-02 02:41 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-02 11:01 +0000
Re: Is GForth KEY really ANS Forth standard? Paul Rubin <no.email@nospam.invalid> - 2017-03-01 13:48 -0800
Re: Is GForth KEY really ANS Forth standard? antispam@math.uni.wroc.pl - 2017-03-04 04:02 +0000
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-04 12:29 +0000
Re: Is GForth KEY really ANS Forth standard? Paul Rubin <no.email@nospam.invalid> - 2017-02-28 03:24 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 04:14 -0800
Re: Is GForth KEY really ANS Forth standard? Coos Haak <htrofhc@gmail.com> - 2017-02-27 21:50 +0100
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 13:48 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-27 17:41 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 15:07 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-27 19:03 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 23:10 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-02-28 03:29 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 01:28 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-28 09:58 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 02:37 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-28 12:46 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 05:01 -0800
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-02-28 12:46 +0100
Re: Is GForth KEY really ANS Forth standard? Mikael Nordman <oh2aun@gmail.com> - 2017-02-28 03:52 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 04:10 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 05:48 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-28 10:07 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-28 02:42 -0800
Re: Is GForth KEY really ANS Forth standard? Mark Wills <markwills1970@gmail.com> - 2017-02-28 02:44 -0800
Re: Is GForth KEY really ANS Forth standard? Coos Haak <htrofhc@gmail.com> - 2017-02-28 12:13 +0100
Re: Is GForth KEY really ANS Forth standard? Mark Wills <markwills1970@gmail.com> - 2017-02-28 05:10 -0800
Re: Is GForth KEY really ANS Forth standard? john <anon@example.com> - 2017-02-28 12:12 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 13:51 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-02-27 15:38 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-02-27 10:13 -0800
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-02-27 11:15 -0800
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-03 12:04 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-03 17:30 -0500
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-03 23:13 +0000
Re: Is GForth KEY really ANS Forth standard? Cecil Bayona <cbayona@cbayona.com> - 2017-03-03 18:02 -0600
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-04 01:12 +0000
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-03 19:12 -0800
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-03 19:23 -0800
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-05 18:45 -0800
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-05 18:54 -0800
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-05 20:47 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 09:20 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-06 05:04 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 14:07 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-06 06:36 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 15:04 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-07 07:38 -0800
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-07 07:56 -0800
Re: Is GForth KEY really ANS Forth standard? Mark Wills <markwills1970@gmail.com> - 2017-03-07 08:07 -0800
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-07 08:37 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-08 15:41 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-09 01:13 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-09 13:03 +0000
Re: Is GForth KEY really ANS Forth standard? julian.fondren@endurance.com - 2017-03-07 08:36 -0800
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-03-07 19:02 +0100
Re: Is GForth KEY really ANS Forth standard? alex@rivadpm.com - 2017-03-08 06:08 -0800
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-09 00:46 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-09 12:39 +0000
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-09 12:42 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-09 23:13 -0800
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-08 14:34 +0000
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-08 15:33 +0000
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-08 15:45 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-08 22:48 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 09:28 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-06 05:22 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 14:25 +0000
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-06 06:46 -0800
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-06 15:43 +0000
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-06 09:55 -0800
Re: Is GForth KEY really ANS Forth standard? Cecil Bayona <cbayona@cbayona.com> - 2017-03-06 11:04 -0600
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-07 07:44 -0800
Re: Is GForth KEY really ANS Forth standard? Cecil Bayona <cbayona@cbayona.com> - 2017-03-07 10:50 -0600
Re: Is GForth KEY really ANS Forth standard? john <anon@example.com> - 2017-03-08 11:30 +0000
Re: Is GForth KEY really ANS Forth standard? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-03-08 13:37 +0000
Re: Is GForth KEY really ANS Forth standard? Alex <alex@rivadpm.com> - 2017-03-08 14:14 +0000
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-03-08 15:16 +0100
Re: Is GForth KEY really ANS Forth standard? john <anon@example.com> - 2017-03-08 16:14 +0000
Re: Is GForth KEY really ANS Forth standard? john <anon@example.com> - 2017-03-08 14:49 +0000
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-09 10:57 -0500
Re: Is GForth KEY really ANS Forth standard? hughaguilar96@gmail.com - 2017-03-05 18:22 -0800
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-04 10:48 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-04 21:00 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-05 02:24 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-05 16:44 -0500
Re: Is GForth KEY really ANS Forth standard? Julian Fondren <julian.fondren@gmail.com> - 2017-03-04 20:02 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-04 23:34 -0500
Re: Is GForth KEY really ANS Forth standard? lehs <skydda.barnen@gmail.com> - 2017-03-05 02:38 -0800
Re: Is GForth KEY really ANS Forth standard? rickman <gnuarm@gmail.com> - 2017-03-05 16:55 -0500
Re: Is GForth KEY really ANS Forth standard? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-02-27 21:24 +0100
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