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// Copyright Oliver Kowalke 2014.
// 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 <exception>
#include <iostream>
#include <string>
#include <boost/context/all.hpp>
#include <boost/lexical_cast.hpp>
class X{
private:
int * inp_;
std::string outp_;
std::exception_ptr excptr_;
boost::context::execution_context caller_;
boost::context::execution_context callee_;
public:
X():
inp_( nullptr),
outp_(),
excptr_(),
caller_(boost::context::execution_context::current()),
callee_(boost::context::fixedsize_stack(),
[=](){
try {
int i = * inp_;
outp_ = boost::lexical_cast<std::string>(i);
caller_.resume();
} catch (...) {
excptr_=std::current_exception();
}
})
{}
std::string operator()(int i){
inp_ = & i;
callee_.resume();
if(excptr_){
std::rethrow_exception(excptr_);
}
return outp_;
}
};
int main() {
X x;
std::cout<<x(7)<<std::endl;
std::cout << "done" << std::endl;
}
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