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March 29, 2016 21:04
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tail recursive
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| (:~ | |
| : tail recursion example | |
| :) | |
| declare function local:sum-a($n){ | |
| if($n eq 0) then 1 else $n+ local:sum-a($n - 1) | |
| }; | |
| declare function local:sum-b($n){ | |
| local:sum-iter(1,$n) | |
| }; | |
| declare function local:sum-iter($sum,$n){ | |
| if($n < 2) then $sum else local:sum-iter($sum+$n,$n -1) | |
| }; | |
| (: sum-a: max value for arg is stacksize=2983 :) | |
| local:sum-b(30000) |
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