mirror of https://gitee.com/bigwinds/arangodb
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
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// Copyright Oliver Kowalke 2014.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <cstdlib>
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#include <iostream>
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#include <tuple>
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#include <boost/context/all.hpp>
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namespace ctx = boost::context;
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ctx::execution_context< int > f1( ctx::execution_context< int > ctx, int data) {
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std::cout << "f1: entered first time: " << data << std::endl;
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std::tie( ctx, data) = ctx( data + 1);
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std::cout << "f1: entered second time: " << data << std::endl;
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std::tie( ctx, data) = ctx( data + 1);
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std::cout << "f1: entered third time: " << data << std::endl;
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return ctx;
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}
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std::tuple< ctx::execution_context< int >, int > f2( ctx::execution_context< int > ctx, int data) {
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std::cout << "f2: entered: " << data << std::endl;
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return std::make_tuple( std::move( ctx), -1);
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}
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int main() {
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int data = 0;
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ctx::execution_context< int > ctx( f1);
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std::tie( ctx, data) = ctx( data + 1);
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std::cout << "f1: returned first time: " << data << std::endl;
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std::tie( ctx, data) = ctx( data + 1);
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std::cout << "f1: returned second time: " << data << std::endl;
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std::tie( ctx, data) = ctx( ctx::exec_ontop_arg, f2, data + 1);
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std::cout << "f1: returned third time" << std::endl;
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std::cout << "main: done" << std::endl;
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return EXIT_SUCCESS;
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}
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