Powered by ViewCVS 1.0-dev
| 1 : | jwilke | 1.1 | \ 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 : |
|
CVS Admin Powered by ViewCVS 1.0-dev |
ViewCVS and CVS Help |