// Copyright - 2020 - Jan Christoph Uhde <[email protected]>

// Please see LICENSE.md for license or visit https://github.com/extcpp/basics

#include <ext/macros/platform.hpp>

#if defined(EXT_MACOS)

int main() {}

#else

// clang-format off

#include <ext/util/function_cache.hpp>

#include <ext/util/scoped_timer.hpp>

#include <future>

#include <iostream>

#include <string>

// clang-format on

using namespace std;

using namespace ext::util;

using namespace std::literals::string_literals;

uint64_t fib(uint64_t n) {

if (n < 2) {

return n;

}

future<uint64_t> n1 = async(fib, n - 1);

future<uint64_t> n2 = async(fib, n - 2);

return n1.get() + n2.get();

}

int main() {

scoped_timer timer("function cache test");

auto fib_cache = add_function_cache(fib);

std::string result;

timer.add_step("init - done");

result = std::to_string(fib(15ull));

timer.add_step("result: "s + result + " - no cache"s);

result = std::to_string(fib_cache(15ull));

timer.add_step("result: "s + result + " - build cache"s);

result = std::to_string(fib_cache(15ull));

timer.add_step("result: "s + result + " - use cache"s);

return 0;

}

#endif // defined(EXT_MACOS)