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Annotation of gforth/kernel/cloop.fs, revision 1.1

1.1     ! jwilke      1: \ Structural Conditionals, loops part                  12dec92py
        !             2: 
        !             3: \ Copyright (C) 1995,1996,1997 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: \ Structural Conditionals                              12dec92py
        !            22: 
        !            23: Variable leavings
        !            24: 
        !            25: : (leave)   here  leavings @ ,  leavings ! ;
        !            26: : LEAVE     compile branch  (leave) ;  immediate restrict
        !            27: : ?LEAVE    compile 0= compile ?branch  (leave) ;
        !            28:                                              immediate restrict
        !            29: 
        !            30: : DONE   ( addr -- )  leavings @
        !            31:   BEGIN  2dup u<=  WHILE  dup @ swap >resolve  REPEAT
        !            32:   leavings ! drop ;                          immediate restrict
        !            33: 
        !            34: \ Structural Conditionals                              12dec92py
        !            35: 
        !            36: : DO        compile (do)   here ;            immediate restrict
        !            37: 
        !            38: : ?DO       compile (?do)  (leave) here ;
        !            39:                                              immediate restrict
        !            40: : FOR       compile (for)  here ;            immediate restrict
        !            41: 
        !            42: : loop]     dup <resolve 2 cells - compile done compile unloop ;
        !            43: 
        !            44: : LOOP      sys? compile (loop)  loop] ;     immediate restrict
        !            45: : +LOOP     sys? compile (+loop) loop] ;     immediate restrict
        !            46: : NEXT      sys? compile (next)  loop] ;     immediate restrict
        !            47: 
        !            48: : EXIT compile ;s ; immediate restrict
        !            49: : ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict
        !            50: