File:  [gforth] / gforth / kernel / Attic / special.fs
Revision 1.7: download - view: text, annotated - select for diffs
Wed Feb 3 00:10:25 1999 UTC (23 years, 10 months ago) by crook
Branches: MAIN
CVS tags: HEAD
New "docclean" target for makefile (removes glossary dependencies when
rebuilding documentation). Changes to .fs files and prim are restricted
to glossary (\G) additions for the documentation; this has necessitated
the addition of new white-space in places to stop the \G stuff from
obscuring the code. Many additions to doc/gforth.ds - new sections
added, a few things moved and some sections re-written slightly. There
are a set of things to tidy up before this rev. is suitable for
release, and those will be my highest priority. I have also used
"@comment TODO" to highlight other sections I plan to work on, and
added a set of comments at the start to indicate other things I plan
to modify in the medium-term.

    1: \ words with non-default and non-immediate compilation semantics
    2: 
    3: \ Copyright (C) 1996,1998 Free Software Foundation, Inc.
    4: 
    5: \ This file is part of Gforth.
    6: 
    7: \ Gforth is free software; you can redistribute it and/or
    8: \ modify it under the terms of the GNU General Public License
    9: \ as published by the Free Software Foundation; either version 2
   10: \ of the License, or (at your option) any later version.
   11: 
   12: \ This program is distributed in the hope that it will be useful,
   13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15: \ GNU General Public License for more details.
   16: 
   17: \ You should have received a copy of the GNU General Public License
   18: \ along with this program; if not, write to the Free Software
   19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   20: 
   21: \ this file comes last, because these words override cross' words.
   22: 
   23: create s"-buffer /line chars allot
   24: has? compiler 0= 
   25: [IF] : s" [ELSE] :noname [THEN]
   26: 	[char] " parse
   27:     	/line min >r s"-buffer r@ cmove
   28:     	s"-buffer r> ;
   29: has? compiler [IF]
   30: :noname [char] " parse postpone SLiteral ;
   31: interpret/compile: S" ( compilation 'ccc"' -- ; run-time -- c-addr u )	\ core,file	s-quote
   32:   \G Compilation: Parse a string ccc delimited by a " (double quote). At run-time,
   33:   \G return the length, u, and the start address, c-addr of the string. Interpretation:
   34:   \G parse the string as before, and return c-addr, u. The string is stored in a
   35:   \G temporary buffer which may be overwritten by subsequent uses of @code{S"}.
   36: [THEN]
   37: 
   38: has? compiler [IF]
   39: : [IS] ( compilation "name" -- ; run-time xt -- ) \ possibly-gforth bracket-is
   40:     ' >body postpone ALiteral postpone ! ; immediate restrict
   41: 
   42: :noname    ' >body ! ;
   43: ' [IS]
   44: interpret/compile: IS ( addr "name" -- ) \ gforth
   45: 
   46: :noname    ' >body @ ;
   47: :noname    ' >body postpone ALiteral postpone @ ;
   48: interpret/compile: What's ( "name" -- addr ) \ gforth
   49: 
   50: :noname    [char] " parse type ;
   51: :noname    postpone (.") ,"  align ;
   52: interpret/compile: ." ( compilation 'ccc"' -- ; run-time -- )  \ core	dot-quote
   53:   \G Compilation: Parse a string ccc delimited by a " (double quote). At run-time,
   54:   \G display the string. Interpretation semantics for this word are undefined in
   55:   \G the ANS Forth Standard. Gforth's interpretation semantics are to display the
   56:   \G string. This is the simplest way to display a string from
   57:   \G within a definition; see examples below.
   58: 
   59: \ DOES>                                                17mar93py
   60: 
   61: :noname
   62:     dodoes, here !does ]
   63:     defstart :-hook ;
   64: :noname
   65:     ;-hook postpone (does>) ?struc dodoes,
   66:     defstart :-hook ;
   67: interpret/compile: DOES>  ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core	does
   68:     
   69: ' IS Alias TO ( addr "name" -- ) \ core-ext
   70: immediate
   71: 
   72: [THEN]
   73: 
   74: has? compiler [IF]
   75: : interpret/compile? ( xt -- flag )
   76:     >does-code ['] S" >does-code = ;
   77: [ELSE]
   78: : interpret/compile?
   79:     false ;
   80: [THEN]
   81: 

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