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| 1 : | jwilke | 1.1 | \ Structural Conditionals, loops part 12dec92py |
| 2 : | |||
| 3 : | anton | 1.2 | \ Copyright (C) 1995,1996,1997,1999 Free Software Foundation, Inc. |
| 4 : | jwilke | 1.1 | |
| 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 : | anton | 1.3 | \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
| 20 : | jwilke | 1.1 | |
| 21 : | \ Structural Conditionals 12dec92py | ||
| 22 : | |||
| 23 : | Variable leavings | ||
| 24 : | |||
| 25 : | : (leave) here leavings @ , leavings ! ; | ||
| 26 : | jwilke | 1.4 | : LEAVE postpone branch (leave) ; immediate restrict |
| 27 : | : ?LEAVE postpone 0= postpone ?branch (leave) ; | ||
| 28 : | jwilke | 1.1 | 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 : | jwilke | 1.4 | : DO postpone (do) here ; immediate restrict |
| 37 : | jwilke | 1.1 | |
| 38 : | jwilke | 1.4 | : ?DO postpone (?do) (leave) here ; |
| 39 : | jwilke | 1.1 | immediate restrict |
| 40 : | jwilke | 1.4 | : FOR postpone (for) here ; immediate restrict |
| 41 : | jwilke | 1.1 | |
| 42 : | jwilke | 1.4 | : loop] dup <resolve 2 cells - postpone done postpone unloop ; |
| 43 : | jwilke | 1.1 | |
| 44 : | jwilke | 1.4 | : LOOP sys? postpone (loop) loop] ; immediate restrict |
| 45 : | : +LOOP sys? postpone (+loop) loop] ; immediate restrict | ||
| 46 : | : NEXT sys? postpone (next) loop] ; immediate restrict | ||
| 47 : | jwilke | 1.1 | |
| 48 : | jwilke | 1.4 | : EXIT postpone ;s ; immediate restrict |
| 49 : | jwilke | 1.1 | : ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict |
| 50 : |
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