//          Copyright Oliver Kowalke 2016.
// Distributed under the Boost Software License, Version 1.0.
//    (See accompanying file LICENSE_1_0.txt or copy at
//          http://www.boost.org/LICENSE_1_0.txt)

#include <cstdlib>
#include <iostream>

#include <boost/context/continuation.hpp>

namespace ctx = boost::context;

int main() {
    ctx::continuation c;
    int data = 1;
    c = ctx::callcc(
            [&data](ctx::continuation && c){
                std::cout << "entered first time: " << data << std::endl;
                data += 2;
                c = c.resume();
                std::cout << "entered second time: " << data << std::endl;
                return std::move( c);
            });
    std::cout << "returned first time: " << data << std::endl;
    data += 2;
    c = c.resume();
    if ( c) {
        std::cout << "returned second time: " << data << std::endl;
    } else {
        std::cout << "returned second time: execution context terminated" << std::endl;
    }
    std::cout << "main: done" << std::endl;
    return EXIT_SUCCESS;
}