File:  [gforth] / gforth / kernel / Attic / special.fs
Revision 1.4: download - view: text, annotated - select for diffs
Sat Sep 13 12:05:53 1997 UTC (25 years, 2 months ago) by jwilke
Branches: MAIN
CVS tags: HEAD
Changed hax-xy flags to environmental queries.

    1: \ words with non-default and non-immediate compilation semantics
    2: 
    3: \ Copyright (C) 1996 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? ionly 
   25: [IF] : s" [ELSE] :noname [THEN]
   26: 	[char] " parse
   27:     	/line min >r s"-buffer r@ cmove
   28:     	s"-buffer r> ;
   29: has? ionly 0= [IF]
   30: :noname [char] " parse postpone SLiteral ;
   31: interpret/compile: S" ( compilation 'ccc"' -- ; run-time -- c-addr u )	\ core,file	s-quote
   32: [THEN]
   33: 
   34: has? ionly 0= [IF]
   35: : [IS] ( compilation "name" -- ; run-time xt -- ) \ possibly-gforth bracket-is
   36:     ' >body postpone ALiteral postpone ! ; immediate restrict
   37: 
   38: :noname    ' >body ! ;
   39: ' [IS]
   40: interpret/compile: IS ( addr "name" -- ) \ gforth
   41: 
   42: :noname    ' >body @ ;
   43: :noname    ' >body postpone ALiteral postpone @ ;
   44: interpret/compile: What's ( "name" -- addr ) \ gforth
   45: 
   46: :noname    [char] " parse type ;
   47: :noname    postpone (.") ,"  align ;
   48: interpret/compile: ." ( compilation 'ccc"' -- ; run-time -- )  \ core	dot-quote
   49: 
   50: \ DOES>                                                17mar93py
   51: 
   52: :noname
   53:     dodoes, here !does ]
   54:     defstart :-hook ;
   55: :noname
   56:     ;-hook postpone (does>) ?struc dodoes,
   57:     defstart :-hook ;
   58: interpret/compile: DOES>  ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core	does
   59:     
   60: ' IS Alias TO ( addr "name" -- ) \ core-ext
   61: immediate
   62: 
   63: [THEN]
   64: 
   65: doer? :docon [IF]
   66: : docon: ( -- addr )	\ gforth
   67:     \G the code address of a @code{CONSTANT}
   68:     ['] bl >code-address ;
   69: [THEN]
   70: 
   71: : docol: ( -- addr )	\ gforth
   72:     \G the code address of a colon definition
   73:     ['] on >code-address ;
   74: \ !! mark on
   75: 
   76: doer? :dovar [IF]
   77: : dovar: ( -- addr )	\ gforth
   78:     \G the code address of a @code{CREATE}d word
   79:     \ in rom-applications variable might be implemented with constant
   80:     \ use really a created word!
   81:     ['] ??? >code-address ;
   82: [THEN]
   83: 
   84: doer? :douser [IF]
   85: : douser: ( -- addr )	\ gforth
   86:     \G the code address of a @code{USER} variable
   87:     ['] sp0 >code-address ;
   88: [THEN]
   89: 
   90: doer? :dodefer [IF]
   91: : dodefer: ( -- addr )	\ gforth
   92:     \G the code address of a @code{defer}ed word
   93:     ['] source >code-address ;
   94: [THEN]
   95: 
   96: doer? :dofield [IF]
   97: : dofield: ( -- addr )	\ gforth
   98:     \G the code address of a @code{field}
   99:     ['] reveal-method >code-address ;
  100: [THEN]
  101: 
  102: has? prims 0= [IF]
  103: : dodoes: ( -- addr )	\ gforth
  104:     \G the code address of a @code{field}
  105:     ['] spaces >code-address ;
  106: [THEN]
  107: 
  108: : interpret/compile? ( xt -- flag )
  109:     >does-code ['] S" >does-code = ;
  110: 

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