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Annotation of gforth/kernel/cloop.fs, revision 1.10

1.1       jwilke      1: \ Structural Conditionals, loops part                  12dec92py
                      2: 
1.9       anton       3: \ Copyright (C) 1995,1996,1997,1999,2001,2003,2006 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
1.10    ! anton       9: \ as published by the Free Software Foundation, either version 3
1.1       jwilke     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
1.10    ! anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       jwilke     19: 
                     20: \ Structural Conditionals                              12dec92py
                     21: 
1.8       pazsan     22: \ this works with flash
1.1       jwilke     23: 
1.8       pazsan     24: : (leave)   -1 , ;
1.4       jwilke     25: : LEAVE     postpone branch  (leave) ;  immediate restrict
                     26: : ?LEAVE    postpone 0= postpone ?branch  (leave) ;
1.1       jwilke     27:                                              immediate restrict
                     28: 
1.8       pazsan     29: : DONE   ( addr -- )  here  swap ?DO
                     30:        I @ ['] branch =  I @ ['] ?branch = or  I @ ['] (?do) = or
                     31:        I cell+ @ -1 = and  IF  I cell+ >resolve  THEN
                     32:     cell +LOOP ;                             immediate restrict
1.1       jwilke     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: