1: \ Structural Conditionals, loops part 12dec92py
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21: \ Structural Conditionals 12dec92py
23: Variable leavings
25: : (leave) here leavings @ , leavings ! ;
26: : LEAVE compile branch (leave) ; immediate restrict
27: : ?LEAVE compile 0= compile ?branch (leave) ;
28: immediate restrict
30: : DONE ( addr -- ) leavings @
31: BEGIN 2dup u<= WHILE dup @ swap >resolve REPEAT
32: leavings ! drop ; immediate restrict
34: \ Structural Conditionals 12dec92py
36: : DO compile (do) here ; immediate restrict
38: : ?DO compile (?do) (leave) here ;
39: immediate restrict
40: : FOR compile (for) here ; immediate restrict
42: : loop] dup <resolve 2 cells - compile done compile unloop ;
44: : LOOP sys? compile (loop) loop] ; immediate restrict
45: : +LOOP sys? compile (+loop) loop] ; immediate restrict
46: : NEXT sys? compile (next) loop] ; immediate restrict
48: : EXIT compile ;s ; immediate restrict
49: : ?EXIT postpone IF postpone EXIT postpone THEN ; immediate restrict