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Annotation of gforth/kernel/cloop.fs, revision 1.3

1.1       jwilke      1: \ Structural Conditionals, loops part                  12dec92py
                      2: 
1.2       anton       3: \ Copyright (C) 1995,1996,1997,1999 Free Software Foundation, Inc.
1.1       jwilke      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
1.3     ! anton      19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       jwilke     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: