luau/bench/tests/shootout/ack.lua

--[[
MIT License

Copyright (c) 2017 Gabriel de Quadros Ligneul

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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]]
-- http://www.bagley.org/~doug/shootout/

local function prequire(name) local success, result = pcall(require, name); return success and result end
local bench = script and require(script.Parent.bench_support) or prequire("bench_support") or require("../../bench_support")

function test()

local function Ack(M, N)
    if (M == 0) then
        return N + 1
    end
    if (N == 0) then
        return Ack(M - 1, 1)
    end
    return Ack(M - 1, Ack(M, (N - 1)))
end

N = tonumber((arg and arg[1])) or 3
M = tonumber((arg and arg[2])) or 8
print(string.format("Ack(%d, %d) = %d\n", N, M, Ack(N,M)))

end

bench.runCode(test, "ack")