context/example/callcc/throw.cpp
2018-02-06 19:29:55 +01:00

48 lines
1.2 KiB
C++

// 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 <exception>
#include <iostream>
#include <stdexcept>
#include <string>
#include <boost/context/continuation.hpp>
namespace ctx = boost::context;
struct my_exception : public std::runtime_error {
ctx::continuation c;
my_exception( ctx::continuation && c_, std::string const& what) :
std::runtime_error{ what },
c{ std::move( c_) } {
}
};
int main() {
ctx::continuation c = ctx::callcc([](ctx::continuation && c) {
for (;;) {
try {
std::cout << "entered" << std::endl;
c = c.resume();
} catch ( my_exception & ex) {
std::cerr << "my_exception: " << ex.what() << std::endl;
return std::move( ex.c);
}
}
return std::move( c);
});
c = c.resume_with(
[](ctx::continuation && c){
throw my_exception(std::move( c), "abc");
return std::move( c);
});
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
}