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Re: dot-quote implementation question

Newsgroups comp.lang.forth
From Albert van der Horst <albert@spenarnc.xs4all.nl>
Subject Re: dot-quote implementation question
Date 2011-12-20 21:55 +0000
Message-ID <lwivjp.esd@spenarnc.xs4all.nl> (permalink)
Organization Dutch Forth Workshop
References <jbvc6f$9ho$1@speranza.aioe.org> <jcn3cl$3c4$1@speranza.aioe.org> <J56dnQ6j7rEH023TnZ2dnUVZ_rGdnZ2d@supernews.com>

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In article <J56dnQ6j7rEH023TnZ2dnUVZ_rGdnZ2d@supernews.com>,
Andrew Haley  <andrew29@littlepinkcloud.invalid> wrote:
>BruceMcF <agila61@netscape.net> wrote:
>> On Dec 19, 1:49?pm, "Elizabeth D. Rather" <erat...@forth.com> wrote:
>>> Well, to be absolutely correct, PFA="Parameter Field *Address*" which
>>> means the address *of* the parameter field of the word being referenced.
>>> That is what you store in the parameter field of a word being compiled
>>> in an ITC implementation, for example. The *parameter field* is where
>>> the payload of a definition goes.
>>
>> Aha, I have been thinking of a DTC. The ITC for a colon definition is:
>>
>> CFA:    .word DOCOL
>> PFA:    .word PF
>
>There is no need for this extra word in ITC.  The only difference with
>DTC is that in DTC the CFA points to  JMP DOCOL  not  .word DOCOL .

A CFA can never point to .word DOCOL. It must point to executable code.
It need not point to a JMP DOCOL. It can point to DOCOL itself.
 a look at ciforth (lina/wina)

If you want an example of a clean implementation of ITC -- at the
expense of space and speed --,  you may have  a look at ciforth
(lina/wina).

>
>> PF:     .word name1,...,name_n,EXIT
>>
>> So DODOES *does* have to do the equivalent of:
>>    R> DUP @ >R CELL+ EXIT
>> ... as I thought (except in C for Rod's implementation), but there's
>> no problem with overwriting the "Parameter Field" because the PFA
>> holds the address of the start of the DOES> segment.
>
>A child of <BUILDS DOES> needs an extra cell.

To store a pointer to what it DOES.

>
>Andrew.

Groetjes Albert

--
-- 
Albert van der Horst, UTRECHT,THE NETHERLANDS
Economic growth -- being exponential -- ultimately falters.
albert@spe&ar&c.xs4all.nl &=n http://home.hccnet.nl/a.w.m.van.der.horst

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dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-10 05:28 -0500
  Re: dot-quote implementation question anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-12-10 12:00 +0000
    Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-10 06:52 -0800
    Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-10 21:10 -0500
      Re: dot-quote implementation question "A. K." <akk@nospam.org> - 2011-12-11 08:59 +0100
      Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-11 03:40 -0600
        Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-12 05:04 -0500
          Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-12 04:56 -0600
            Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-13 10:08 -0500
          Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-12 07:42 -0800
            Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-13 09:47 -0500
              Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-17 04:57 -0500
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-17 04:20 -0600
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-18 07:18 -0500
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-18 06:30 -0600
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-20 03:04 -0600
              Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-17 08:15 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-18 07:53 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 09:14 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:24 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 09:11 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 10:53 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-19 08:38 -1000
                Re: dot-quote implementation question "A. K." <akk@nospam.org> - 2011-12-19 21:34 +0100
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 12:51 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 10:16 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-18 08:18 -1000
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:25 -0500
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-19 22:23 +0100
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:53 -0500
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-20 19:58 +0100
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 11:44 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:16 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 11:50 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 14:56 -0500
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 21:49 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-18 14:33 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-19 05:26 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 09:38 -0800
                Re: dot-quote implementation question "Elizabeth D. Rather" <erather@forth.com> - 2011-12-19 08:49 -1000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 13:04 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:57 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 12:23 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 14:27 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:14 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 14:53 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 21:48 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 22:02 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-29 03:39 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-29 12:37 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-30 13:31 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-30 11:12 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-31 05:52 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-31 11:33 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-31 20:10 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-31 19:12 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2012-01-04 05:13 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2012-01-04 12:49 -0800
                Re: dot-quote implementation question Coos Haak <chforth@hccnet.nl> - 2011-12-22 00:55 +0100
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-20 21:43 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-19 13:25 -0800
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-20 03:00 -0600
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 04:40 -0800
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-20 21:55 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 14:33 -0800
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-22 20:33 +0000
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-22 13:32 -0800
                Re: dot-quote implementation question Andrew Haley <andrew29@littlepinkcloud.invalid> - 2011-12-21 03:01 -0600
                Re: dot-quote implementation question Albert van der Horst <albert@spenarnc.xs4all.nl> - 2011-12-22 20:38 +0000
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:53 -0500
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:49 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 08:20 -0800
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-20 04:49 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-20 10:58 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 08:41 -0800
                Re: dot-quote implementation question "Rod Pemberton" <do_not_have@noavailemail.cmm> - 2011-12-21 16:14 -0500
                Re: dot-quote implementation question BruceMcF <agila61@netscape.net> - 2011-12-21 15:14 -0800
      Strings (was: dot-quote implementation question) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2011-12-11 10:33 +0000
        Re: Strings (was: dot-quote implementation question) kenney@cix.compulink.co.uk - 2011-12-12 02:53 -0600

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