version 1.1, 1999/05/17 14:53:30
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version 1.5, 2003/03/09 15:17:05
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\ Structural Conditionals, loops part 12dec92py |
\ Structural Conditionals, loops part 12dec92py |
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\ Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1999,2001 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program; if not, write to the Free Software |
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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\ Structural Conditionals 12dec92py |
\ Structural Conditionals 12dec92py |
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Variable leavings |
Variable leavings |
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: (leave) here leavings @ , leavings ! ; |
: (leave) here leavings @ , leavings ! ; |
: LEAVE compile branch (leave) ; immediate restrict |
: LEAVE postpone branch (leave) ; immediate restrict |
: ?LEAVE compile 0= compile ?branch (leave) ; |
: ?LEAVE postpone 0= postpone ?branch (leave) ; |
immediate restrict |
immediate restrict |
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: DONE ( addr -- ) leavings @ |
: DONE ( addr -- ) leavings @ |
Line 33 Variable leavings
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Line 33 Variable leavings
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\ Structural Conditionals 12dec92py |
\ Structural Conditionals 12dec92py |
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: DO compile (do) here ; immediate restrict |
: DO postpone (do) here ; immediate restrict |
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: ?DO compile (?do) (leave) here ; |
: ?DO postpone (?do) (leave) here ; |
immediate restrict |
immediate restrict |
: FOR compile (for) here ; immediate restrict |
: FOR postpone (for) here ; immediate restrict |
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: loop] dup <resolve 2 cells - compile done compile unloop ; |
: loop] dup <resolve 2 cells - postpone done postpone unloop ; |
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: LOOP sys? compile (loop) loop] ; immediate restrict |
: LOOP sys? postpone (loop) loop] ; immediate restrict |
: +LOOP sys? compile (+loop) loop] ; immediate restrict |
: +LOOP sys? postpone (+loop) loop] ; immediate restrict |
: NEXT sys? compile (next) loop] ; immediate restrict |
: NEXT sys? postpone (next) loop] ; immediate restrict |
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: EXIT compile ;s ; immediate restrict |
: EXIT postpone ;s ; immediate restrict |
: ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict |
: ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict |
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