Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.forth > #15199

Re: continue equivalent in Forth?

From mhx@iae.nl (Marcel Hendrix)
Subject Re: continue equivalent in Forth?
Newsgroups comp.lang.forth
Message-ID <56581508958435@frunobulax.edu> (permalink)
Date 2012-08-27 20:45 +0200
References <k1gaca$vu1$1@dont-email.me>
Organization Wanadoo

Show all headers | View raw

Gerry Jackson <gerry@jackson9000.fsnet.co.uk> writes Re: continue equivalent in Forth?

> On 27/08/2012 17:14, Marcel Hendrix wrote:
>> Gerry Jackson <gerry@jackson9000.fsnet.co.uk> writes Re: continue equivalent in Forth?
[..]
> I don't recommend turning off SECURE .
[..]
> That's interesting, I now see that is mentioned in the manual. Why is 
> this necessary for iForth but not for other ANS Forth systems? Only 
> origs and a dest are on the CFS when CS-PICK and CS-ROLL are used so 
> ISTM that SECURE on makes iForth non-compliant with ANS Forth when 
> manipulating the control flow stack.

[..]

Well, it is (obviously) not necessary for iForth to have SECURE on. The
reason SECURE is on is painful memories of trying to compile large NOVIX 
block files. 

The SECURE feature can be permanently turned off by editing the
iforth.prf file.

Why don't other Forths have SECURE? They may have a fail-safe mechanism 
to catch silly errors that does not interfere with their CS-PICK etc.

But ...

-- -------------------------------
 VFX Forth for Windows IA32
 © MicroProcessor Engineering Ltd, 1998-2012 

 Version: 4.50 [build 3327]
 Build date: 17 April 2012

 Free dictionary = 7561806 bytes [7384kb]


: test begin 1 2 + else 3 then ;  ok
-- --------------------------------------

-- ----------------------------------------------------
SwiftForth i386-Win32 3.2.2 08-Jul-2010
base @ hex : testing again 10 20 + begin ; decimal  ok
-- ----------------------------------------------------

... apparently passes unnoticed.


(gForth can't be caught that easily.)

Another reason for iForth's SECURE is that the compiler uses 
extra items on the CS stack to remember when registers should 
be spilled/loaded to/from the stacks for control flow nodes. 

Yet another reason is the somewhat complicated parallel 
programming structures.

These extra CS items can be used to give better messages, but as 
that is not ANS compatible, there must be a way to turn them off.

I am not claiming that having extra items on the CS stack is the only
way to get the mentioned features.

-marcel

Back to comp.lang.forth | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

continue equivalent in Forth? programmingkidx@gmail.com - 2012-08-18 19:28 -0700
  Re: continue equivalent in Forth? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-19 01:43 -0500
  Re: continue equivalent in Forth? mhx@iae.nl - 2012-08-19 03:40 -0700
  Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-19 21:07 +1000
    Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-19 13:55 +0200
      Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-20 22:13 +1000
    Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-19 14:18 +0200
      Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-19 14:57 +0200
        Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-19 16:39 +0200
      Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-20 22:18 +1000
      Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-21 00:05 -0400
        Re: continue equivalent in Forth? hughaguilar96@yahoo.com - 2012-08-20 21:17 -0700
          Re: continue equivalent in Forth? Alex McDonald <blog@rivadpm.com> - 2012-08-21 02:40 -0700
          Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-22 15:33 +1000
        Re: continue equivalent in Forth? Alex McDonald <blog@rivadpm.com> - 2012-08-21 02:37 -0700
          Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 00:53 -0400
            Re: continue equivalent in Forth? Alex McDonald <blog@rivadpm.com> - 2012-08-22 04:10 -0700
        Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-21 11:40 +0000
          Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 00:53 -0400
            Re: continue equivalent in Forth? "Elizabeth D. Rather" <erather@forth.com> - 2012-08-21 21:18 -1000
              Re: continue equivalent in Forth? hughaguilar96@yahoo.com - 2012-08-22 00:52 -0700
                Re: continue equivalent in Forth? Alex McDonald <blog@rivadpm.com> - 2012-08-22 04:12 -0700
                Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 07:43 -0400
                Re: continue equivalent in Forth? hughaguilar96@yahoo.com - 2012-08-22 20:04 -0700
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-25 15:50 +1000
                Re: continue equivalent in Forth? "Elizabeth D. Rather" <erather@forth.com> - 2012-08-24 21:03 -1000
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-26 22:13 +1000
                Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-25 10:40 +0200
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-29 18:29 +1000
                Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-29 21:26 +0200
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-26 22:33 +1000
              Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 07:46 -0400
                Re: continue equivalent in Forth? "Elizabeth D. Rather" <erather@forth.com> - 2012-08-22 07:20 -1000
            Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-22 09:37 +0000
              Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-22 20:46 +1000
              Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 07:44 -0400
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-22 14:26 +0000
                Re: continue equivalent in Forth? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-08-24 17:34 +0100
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-24 16:50 +0000
                Re: continue equivalent in Forth? Mark Wills <markrobertwills@yahoo.co.uk> - 2012-08-24 13:47 -0700
                Re: continue equivalent in Forth? mhx@iae.nl - 2012-08-24 22:51 -0700
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-25 08:55 +0000
                Re: continue equivalent in Forth? hughaguilar96@yahoo.com - 2012-08-25 20:47 -0700
                Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-26 06:20 -0400
                Re: continue equivalent in Forth? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-26 11:04 -0500
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-26 16:06 +0000
                Re: continue equivalent in Forth? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-26 15:32 -0500
                Re: continue equivalent in Forth? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-08-27 22:58 -0700
                Re: continue equivalent in Forth? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-08-26 22:07 +0100
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-27 18:14 +0200
                Re: continue equivalent in Forth? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-08-27 18:22 +0100
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-27 20:45 +0200
                Re: continue equivalent in Forth? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-08-27 21:43 +0100
                Re: continue equivalent in Forth? "Elizabeth D. Rather" <erather@forth.com> - 2012-08-27 12:15 -1000
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-28 20:43 +0200
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-29 17:10 +1000
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-28 15:56 +0000
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-28 20:35 +0200
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-30 12:32 +0000
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-30 22:39 +0200
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-08-31 09:14 +0000
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-31 21:32 +0200
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-09-02 20:30 +1000
                Re: continue equivalent in Forth? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-09-02 13:15 +0000
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-31 18:27 +1000
                Re: continue equivalent in Forth? mhx@iae.nl (Marcel Hendrix) - 2012-08-31 20:39 +0200
                Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-09-01 14:28 +1000
          Re: continue equivalent in Forth? hughaguilar96@yahoo.com - 2012-08-21 22:59 -0700
        Re: continue equivalent in Forth? Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-21 20:49 +0200
          Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-22 07:46 -0400
            Re: continue equivalent in Forth? Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-22 16:24 +0200
    Re: continue equivalent in Forth? programmingkidx@gmail.com - 2012-08-19 14:37 -0700
      Re: continue equivalent in Forth? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2012-08-20 05:17 -0500
      Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-20 22:34 +1000
      Re: continue equivalent in Forth? "Ed" <invalid@nospam.com> - 2012-08-20 23:01 +1000
      Re: continue equivalent in Forth? stephenXXX@mpeforth.com (Stephen Pelc) - 2012-08-21 08:34 +0000
        Re: continue equivalent in Forth? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-08-21 15:53 +0100
  Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-19 11:00 -0400
    Re: continue equivalent in Forth? Coos Haak <chforth@hccnet.nl> - 2012-08-19 20:29 +0200
      Re: continue equivalent in Forth? "Rod Pemberton" <do_not_have@notemailnot.cmm> - 2012-08-21 00:04 -0400
    Re: continue equivalent in Forth? programmingkidx@gmail.com - 2012-08-19 14:09 -0700
  Re: continue equivalent in Forth? Mark Wills <markrobertwills@yahoo.co.uk> - 2012-08-19 11:31 -0700
    Re: continue equivalent in Forth? programmingkidx@gmail.com - 2012-08-19 14:43 -0700

csiph-web