/******************************************************************************* * Copyright 2017-2018 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ #include <iostream> #include <tuple> int count() { static int counter = 0; return counter++; } std::tuple<int, int> stateless_count(int counter) { return std::tuple<int, int>(counter, counter + 1); } int main() { std::cout << "State: " << count() << ", " << count() << std::endl; std::cout << "Stateless: "; int counter = 0; { auto r(stateless_count(counter)); counter = std::get<1>(r); std::cout << std::get<0>(r); } std::cout << ", "; { auto r(stateless_count(counter)); counter = std::get<1>(r); std::cout << std::get<0>(r); } std::cout << std::endl; }