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Re: Genral advise and comments on callback style words

From Chris Hinsley <chris.hinsley@gmail.com>
Newsgroups comp.lang.forth
Date 2012-11-07 13:51 +0000
Message-ID <2012110713512322818-chrishinsley@gmailcom> (permalink)
References <2012110713421835115-chrishinsley@gmailcom>
Subject Re: Genral advise and comments on callback style words

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On 2012-11-07 13:42:18 +0000, Chris Hinsley said:

> Folks I have implamented an Amiga style double linked list words set a 
> few days back and I have an emueration word as follows:
> 
> \ ( u xt lh -- ln | 0)
> \ xt api is ( u ln lh -- ln | 0 )
> : LISTHEAD-ENUMERATE-FORWARDS
> 	0 >R
> 	DUP LISTHEAD-GET-HEAD DUP
> 	BEGIN
> 		NIP DUP LISTNODE-GET-SUCC
> 		DUP
> 	WHILE
> 		4 PICK 2 PICK 4 PICK
> 		6 PICK EXECUTE DUP R!
> 	UNTIL THEN
> 	2DROP 2DROP DROP
> 	R>
> ;
> 
> This scans down the list until either it hits the end, or the callback 
> for each node returns a value other than 0, that value is returned and 
> the scan stops if it isn't 0 !
> 
> I'd like comments and advice on techniuqe, paticularly for things like 
> the PICK stuff that gathers paramaters for each callback, and the use 
> of the return stack for the returned value. Or if you just plain think 
> I could code this a better way !
> 
> I'm not wanting to be pointed to "the novice package", thank you, but 
> want this API as stated ! ;)
> 
> Regards all
> 
> Chris

I should also add that I wish to retain the 'look ahead' pointer to the 
next node as the callback word must be allowed to remove or modify the 
node it gets handed ! So the 'NIP DUP LISTNODE-GET-SUCC' is the bit 
doing that.

Chris

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Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 13:42 +0000
  Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 13:51 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 13:56 +0000
  Re: Genral advise and comments on callback style words anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-07 13:55 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 15:29 +0000
      Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 15:35 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 15:32 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 15:37 +0000
      Re: Genral advise and comments on callback style words anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-08 16:31 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 17:02 +0000
          Re: Genral advise and comments on callback style words anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-08 17:07 +0000
          Re: Genral advise and comments on callback style words Mark Wills <forthfreak@gmail.com> - 2012-11-09 01:16 -0800
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-07 15:41 +0000
      Re: Genral advise and comments on callback style words anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-11-08 16:39 +0000
  Re: Genral advise and comments on callback style words Brad Eckert <hwfwguy@gmail.com> - 2012-11-07 08:07 -0800
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 12:52 +0000
  Re: Genral advise and comments on callback style words humptydumpty <ouatubi@gmail.com> - 2012-11-07 13:04 -0800
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 13:04 +0000
      Re: Genral advise and comments on callback style words Mark Wills <forthfreak@gmail.com> - 2012-11-08 06:34 -0800
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:40 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 13:14 +0000
      Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 13:23 +0000
      Re: Genral advise and comments on callback style words Ouatu Bogdan <ouatubi@gmail.com> - 2012-11-08 13:45 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 13:59 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:02 +0000
          Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 15:35 +0000
            Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 16:24 +0000
              Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 16:39 +0000
                Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 16:57 +0000
                Re: Genral advise and comments on callback style words "Elizabeth D. Rather" <erather@forth.com> - 2012-11-08 07:56 -1000
  Re: Genral advise and comments on callback style words Josh Grams <josh@qualdan.com> - 2012-11-08 13:54 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:06 +0000
      Re: Genral advise and comments on callback style words Josh Grams <josh@qualdan.com> - 2012-11-08 18:04 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 19:36 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 19:38 +0000
          Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 19:42 +0000
    Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:11 +0000
      Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:31 +0000
        Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 14:51 +0000
          Re: Genral advise and comments on callback style words Josh Grams <josh@qualdan.com> - 2012-11-08 18:23 +0000
            Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 19:57 +0000
            Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 20:04 +0000
              Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 20:17 +0000
                Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 20:29 +0000
                Re: Genral advise and comments on callback style words Chris Hinsley <chris.hinsley@gmail.com> - 2012-11-08 20:50 +0000

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