Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc

From	Cecil Bayona <cbayona@cbayona.com>
Newsgroups	comp.lang.forth
Subject	Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc
Date	2016-08-07 16:11 -0500
Organization	A noiseless patient Spider
Message-ID	<no8867$dgr$1@dont-email.me> (permalink)
References	(16 earlier) <no6o5j$hs8$1@dont-email.me> <87twex2ebj.fsf@jester.gateway.pace.com> <3874fc1a-1503-4771-83d7-8014e8014dbd@googlegroups.com> <1e5face5-63f8-4811-83b7-5355a7f99f46@googlegroups.com> <0240b1e4-8f8f-413b-996d-c99c3ce23e5c@googlegroups.com>

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On 8/7/2016 2:35 PM, hughaguilar96@gmail.com wrote:

> This is how Straight Forth works. It has a "fat xt." In Straight Forth the cells are 64-bit, but the addresses are all 32-bit. A fat-xt is a 64-bit struct that contains the 32-bit cfa and the 32-bit pointer to the parent function's local-frame.
>
> The fat-xt can be passed around and used without following the four rules mentioned above for rquotations --- the only limitation is that the parent function still has to be in scope when the quotation is executed --- I have a method for checking this and aborting with a helpful error message if the parent function is not in scope, rather than just blindly access a local-frame that no longer exists.
>
In Delphi when you define a function inside a function, it passes a 
pointer to the parents environment, so the function has access to the 
parents variables, and that environment contains a pointer to it's 
parents environment, so you could access the grand-parents variables 
also or further back the chain. I have never tried it other than 
accessing the parents variables but the possibility is there. In couple 
of cases that proved rather handy, I didn't know they were closures but 
I did used them in a couple of cases when manipulating complex data 
structures in the BT+ Library, it cut down on the number of parameters 
being passed since I could access the parents data and change it.
-- 
Cecil - k5nwa

Thread

The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-02 09:33 -0700
  Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc Paul Rubin <no.email@nospam.invalid> - 2016-08-02 10:35 -0700
    Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-02 11:46 -0700
      Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-03 00:04 -0700
        Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-04 00:41 -0700
          Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc rickman <gnuarm@gmail.com> - 2016-08-04 09:35 -0400
            Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-04 10:08 -0500
  Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc Brad Eckert <hwfwguy@gmail.com> - 2016-08-02 15:45 -0700
    Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-02 19:56 -0500
      Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-02 22:43 -0700
      Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-03 00:12 -0700
        Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-03 02:42 -0500
          Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-03 10:41 -0700
            Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-03 12:56 -0500
            Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-03 13:09 -0500
              Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc rickman <gnuarm@gmail.com> - 2016-08-03 14:15 -0400
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Richard Owlett <rowlett@cloud85.net> - 2016-08-03 18:00 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-05 20:35 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-06 00:16 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-06 16:58 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-06 18:01 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-06 21:28 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-06 19:46 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-06 22:54 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Julian Fondren <julian.fondren@gmail.com> - 2016-08-06 21:39 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Paul Rubin <no.email@nospam.invalid> - 2016-08-06 22:28 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-06 23:49 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-07 02:32 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Paul Rubin <no.email@nospam.invalid> - 2016-08-07 01:06 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-07 07:05 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 13:01 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-07 16:02 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 14:20 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc franck.bensusan@gmail.com - 2016-08-08 03:13 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-08 11:25 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Paul Rubin <no.email@nospam.invalid> - 2016-08-07 13:55 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-07 16:22 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 15:03 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Håkan Thörngren <hth313@gmail.com> - 2016-08-07 23:02 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc "Elizabeth D. Rather" <erather@forth.com> - 2016-08-07 21:10 -1000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-09 00:36 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-08 09:06 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 09:33 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Håkan Thörngren <hth313@gmail.com> - 2016-08-07 11:31 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 12:35 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-07 16:11 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Håkan Thörngren <hth313@gmail.com> - 2016-08-07 22:43 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Håkan Thörngren <hth313@gmail.com> - 2016-08-07 22:48 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-08 08:34 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-08 23:59 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-09 13:53 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-10 19:56 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Julian Fondren <julian.fondren@gmail.com> - 2016-08-11 00:33 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-11 11:58 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-11 13:16 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc stephen@mpeforth.com (Stephen Pelc) - 2016-08-11 23:36 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-11 20:49 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-28 11:20 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-28 17:33 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-28 21:10 -0500
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-28 22:49 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-12 23:10 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Julian Fondren <julian.fondren@gmail.com> - 2016-08-06 20:20 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-07 09:58 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Julian Fondren <julian.fondren@gmail.com> - 2016-08-07 11:08 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-08 09:10 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-08 10:47 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc JennyB <jennybrien@googlemail.com> - 2016-08-08 13:44 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc mhx@iae.nl - 2016-08-08 11:32 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-09 06:13 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-09 06:19 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc mhx@iae.nl - 2016-08-09 02:54 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2016-08-09 10:22 +0000
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc lawrencedo99@gmail.com - 2016-08-15 20:33 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-16 10:40 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc lawrencedo99@gmail.com - 2016-08-17 02:21 -0700
                Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-17 11:14 -0700
        Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Roberto Waltman <usenet@rwaltman.com> - 2016-08-03 18:21 -0400
    Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc rickman <gnuarm@gmail.com> - 2016-08-03 02:46 -0400
  Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc endlessboomcapitalism@gmail.com - 2016-08-13 09:51 -0700
    Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-13 12:18 -0700
      Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc endlessboomcapitalism@gmail.com - 2016-08-14 19:13 -0700
        Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-15 07:43 -0700
          Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Cecil Bayona <cbayona@cbayona.com> - 2016-08-15 12:34 -0500
            Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc Brad Eckert <hwfwguy@gmail.com> - 2016-08-17 22:08 -0700
              Re: The Fourth Forth eBook in our little series - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-18 15:26 -0700
      Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc endlessboomcapitalism@gmail.com - 2016-08-14 19:18 -0700
      Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc hughaguilar96@gmail.com - 2016-08-15 08:24 -0700
        Re: The Fourth Forth eBook in our little series  - Programming Forth - Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-15 08:31 -0700
          Re: The Fourth Forth eBook in our little series - Programming Forth- Stephen Pelc "WJ" <w_a_x_man@yahoo.com> - 2016-08-19 23:54 +0000
            Re: The Fourth Forth eBook in our little series - Programming Forth- Stephen Pelc JUERGEN <epldfpga@aol.com> - 2016-08-20 01:43 -0700

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