Annotation of gforth/kernel/cloop.fs, revision 1.4

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 ! ;
1.4     ! jwilke     26: : LEAVE     postpone branch  (leave) ;  immediate restrict
        !            27: : ?LEAVE    postpone 0= postpone ?branch  (leave) ;
1.1       jwilke     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: 
1.4     ! jwilke     36: : DO        postpone (do)   here ;            immediate restrict
1.1       jwilke     37: 
1.4     ! jwilke     38: : ?DO       postpone (?do)  (leave) here ;
1.1       jwilke     39:                                              immediate restrict
1.4     ! jwilke     40: : FOR       postpone (for)  here ;            immediate restrict
1.1       jwilke     41: 
1.4     ! jwilke     42: : loop]     dup <resolve 2 cells - postpone done postpone unloop ;
1.1       jwilke     43: 
1.4     ! jwilke     44: : LOOP      sys? postpone (loop)  loop] ;     immediate restrict
        !            45: : +LOOP     sys? postpone (+loop) loop] ;     immediate restrict
        !            46: : NEXT      sys? postpone (next)  loop] ;     immediate restrict
1.1       jwilke     47: 
1.4     ! jwilke     48: : EXIT postpone ;s ; immediate restrict
1.1       jwilke     49: : ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict
                     50: 

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