60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
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// Copyright Oliver Kowalke 2016.
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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 <boost/context/continuation.hpp>
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namespace ctx = boost::context;
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class moveable {
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public:
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int value;
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moveable() :
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value( -1) {
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}
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moveable( int v) :
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value( v) {
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}
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moveable( moveable && other) {
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std::swap( value, other.value);
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}
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moveable & operator=( moveable && other) {
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if ( this == & other) return * this;
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value = other.value;
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other.value = -1;
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return * this;
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}
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moveable( moveable const& other) = delete;
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moveable & operator=( moveable const& other) = delete;
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};
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int main() {
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ctx::continuation c;
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moveable data{ 1 };
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c = ctx::callcc( std::allocator_arg, ctx::fixedsize_stack{},
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[&data](ctx::continuation && c){
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std::cout << "entered first time: " << data.value << std::endl;
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data = std::move( moveable{ 3 });
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c = c.resume();
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std::cout << "entered second time: " << data.value << std::endl;
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data = std::move( moveable{});
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return std::move( c);
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});
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std::cout << "returned first time: " << data.value << std::endl;
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data.value = 5;
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c = c.resume();
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std::cout << "returned second time: " << data.value << 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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