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Newsgroups: comp.lang.forth
Subject: ANS TC Magnet for Vocabularies and :
Message-ID: <756.UUL1.3#5129@willett.UUCP>
Date: 9 Apr 90 01:28:42 GMT
Organization: Latest link in the ForthNet chain.  (Pgh, PA)
Lines: 62

Category 10,  Topic 14
Message 16        Sat Apr 07, 1990
R.BERKEY [Robert]            at 19:33 PDT
 
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 ANSI X3J14 Forth Technical Proposal                      Page 1 of 1
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             Title: ACQUIRE
 Related Proposals:
        Keyword(s): vocabularies, wordlists              Proposal (X)
     Forth Word(s): FORTH WORDLIST                       Comment  ( )
 ------------------
 Abstract:
    Add ACQUIRE to the Wordlist wordset.

 ------------------
 Discussion:

   Without the ability to search individual wordlists, programs
   effectively can only use wordlists for being compiled.  This one
   element has a broad range of application, from implementing the
   standard from within the standard, to self-analyzing programs, to
   avoiding complications involving variables, to object oriented
   programming.  Without this one element, implementing a compiler or
   an interpreter must be done from scratch.

   By inference, any system with wordlists can implement this word.

   The flag input to ACQUIRE has this purpose: the output from FIND
   or an ACQUIRE can be passed into an ACQUIRE .  This avoids complex
   and relatively inefficient control structures for multiple
   wordlist searches.

   References: Berkey, "Four Vocabulary Tools", 1984 Rochester Forth
               Applications Conference Proceedings.

   The text below follows that in FIND .
 -------------------
 Proposal:

 Add to the WORDLIST word set:

   ACQUIRE   ( addr1 flag wl-token -- addr1 0 ) -or-
             ( addr1 flag wl-token -- w 1 ) -or-
             ( addr1 flag wl-token -- w -1 )
   wl-token is the execution token of a wordlist.  If flag is false,
   return addr1, and 0.  Otherwise, find the Forth word named in
   counted string at addr1.  If the word is not found, return addr1,
   and 0.  If the word is found, return the execution token w; if the
   word is immediate, return 1, otherwise return -1.
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 Submitted by:  Robert Berkey                          Date: 90-04-07
 Address:       47000 Warm Springs Blvd. #253      Ph: (415) 659-1334
                Fremont, CA 94539               Msgs: GEnie, R.BERKEY

 ANSI X3J14 Forth Standards Committee
 111 N. Sepulveda Blvd., Suite 300, Manhattan Beach, CA 90266
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