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mal/impls/tests/computations.mal
Joel Martin 8a19f60386 Move implementations into impls/ dir
- Reorder README to have implementation list after "learning tool"
  bullet.

- This also moves tests/ and libs/ into impls. It would be preferrable
  to have these directories at the top level.  However, this causes
  difficulties with the wasm implementations which need pre-open
  directories and have trouble with paths starting with "../../". So
  in lieu of that, symlink those directories to the top-level.

- Move the run_argv_test.sh script into the tests directory for
  general hygiene.
2020-02-10 23:50:16 -06:00

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;; Some inefficient arithmetic computations for benchmarking.
;; Unfortunately not yet available in tests of steps 4 and 5.
;; Compute n(n+1)/2 with a non tail-recursive call.
(def! sumdown
(fn* [n] ; non-negative number
(if (= n 0)
0
(+ n (sumdown (- n 1))))))
;; Compute a Fibonacci number with two recursions.
(def! fib
(fn* [n] ; non-negative number
(if (<= n 1)
n
(+ (fib (- n 1)) (fib (- n 2))))))