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https://github.com/nineties/planckforth
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11 lines
290 B
Forth
11 lines
290 B
Forth
\ planckforth -
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\ Copyright (C) 2021 nineties
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\ test/tester.fs and test codes are base on
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\ https://github.com/gerryjackson/forth2012-test-suite
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defined? roll [unless]
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: roll ( wn ... w1 n -- w1 wn ... w2 -- )
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dup 0<= if drop else swap >r 1- recurse r> swap then
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;
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[then]
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