Re: Search order - why usually two times "Forth"?

From	anton@mips.complang.tuwien.ac.at (Anton Ertl)
Newsgroups	comp.lang.forth
Subject	Re: Search order - why usually two times "Forth"?
Date	2015-02-18 14:00 +0000
Organization	Institut fuer Computersprachen, Technische Universitaet Wien
Message-ID	<2015Feb18.150022@mips.complang.tuwien.ac.at> (permalink)
References	<slrnme53rj.1qm.empty.buffersYOU-DONT-WANT-THIS@Ferrycy.localdomain> <2015Feb17.135426@mips.complang.tuwien.ac.at> <slrnme72k9.7sh.empty.buffersYOU-DONT-WANT-THIS@Ferrycy.localdomain> <2015Feb18.123119@mips.complang.tuwien.ac.at> <54e490ca$0$21336$e4fe514c@dreader37.news.xs4all.nl>

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albert@spenarnc.xs4all.nl (Albert van der Horst) writes:
>While we are at it, has some one ever removed the wordlist
>to which definitions are added (CURRENT I think) from the
>search order, to arrive at a special effect in compilation?

With SET-CURRENT you don't need to put it in the search order in the
first place.  With DEFINITIONS you have to, but then you may be using
vocabularies that overwrite the top of the search order, so no need to
explicitly remove it, either.  I.e.:

vocabulary assembler assembler definitions forth

>Has anybody a use case for this, i.e. a situation where
>it is essential that CURRENT and CONTEXT are different?

Some assemblers define words that are spelled exactly like standard
Forth words, e.g., AND XOR OR.  And you may want to use the Forth
words while defining the assembler words, so you may want the
ASSEMBLER wordlist to be current, but not in the search order.

One other application I can imagine is that you define a wordlist of
aliases (e.g., for sealing), but use deferred words for the aliases.
Then you may want to have definitions like

defer foo ' foo is foo.

- 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
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Thread

Search order - why usually two times "Forth"? empty-buffers <empty.buffersYOU-DONT-WANT-THIS@gmail.NEITHER-THIS.com> - 2015-02-17 00:46 +0000
  Re: Search order - why usually two times "Forth"? "Alex McDonald" <blog@rivadpm.com> - 2015-02-17 09:33 +0000
    Re: Search order - why usually two times "Forth"? empty-buffers <empty.buffersYOU-DONT-WANT-THIS@gmail.NEITHER-THIS.com> - 2015-02-17 10:08 +0000
    Re: Search order - why usually two times "Forth"? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-02-17 11:07 +0000
  Re: Search order - why usually two times "Forth"? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-02-17 12:54 +0000
    Re: Search order - why usually two times "Forth"? empty-buffers <empty.buffersYOU-DONT-WANT-THIS@gmail.NEITHER-THIS.com> - 2015-02-17 18:38 +0000
      Re: Search order - why usually two times "Forth"? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-02-18 11:31 +0000
        Re: Search order - why usually two times "Forth"? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2015-02-18 13:16 +0000
          Re: Search order - why usually two times "Forth"? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-02-18 14:00 +0000
            Re: Search order - why usually two times "Forth"? "Alex McDonald" <blog@rivadpm.com> - 2015-02-18 16:44 +0000
  Re: Search order - why usually two times "Forth"? november.nihal@gmail.com - 2015-02-17 07:13 -0800
  Re: Search order - why usually two times "Forth"? "Elizabeth D. Rather" <erather@forth.com> - 2015-02-17 08:21 -1000
    Re: Search order - why usually two times "Forth"? "Alex McDonald" <blog@rivadpm.com> - 2015-02-17 18:43 +0000
      Re: Search order - why usually two times "Forth"? "Elizabeth D. Rather" <erather@forth.com> - 2015-02-17 11:59 -1000
    Re: Search order - why usually two times "Forth"? hughaguilar96@gmail.com - 2015-02-17 18:30 -0800
      Re: Search order - why usually two times "Forth"? JennyB <jennybrien@googlemail.com> - 2015-02-18 04:01 -0800
        Re: Search order - why usually two times "Forth"? hughaguilar96@gmail.com - 2015-02-18 18:13 -0800
          Re: Search order - why usually two times "Forth"? "HAA" <someone@microsoft.com> - 2015-02-28 11:35 +1100
      Re: Search order - why usually two times "Forth"? "Alex McDonald" <blog@rivadpm.com> - 2015-02-18 12:34 +0000
    Re: Search order - why usually two times "Forth"? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2015-02-18 12:28 +0000
  Re: Search order - why usually two times "Forth"? jacko <jackokring@gmail.com> - 2015-02-18 08:49 -0800
    Re: Search order - why usually two times "Forth"? jacko <jackokring@gmail.com> - 2015-02-18 09:04 -0800
      Re: Search order - why usually two times "Forth"? jacko <jackokring@gmail.com> - 2015-02-18 10:17 -0800
        Re: Search order - why usually two times "Forth"? jacko <jackokring@gmail.com> - 2015-02-18 10:20 -0800

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