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// Copyright (C) 2006-2009, 2012 Alexander Nasonov
// Copyright (C) 2012 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0
// (see accompanying file LICENSE_1_0.txt or a copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Home at http://www.boost.org/libs/scope_exit
#include <boost/config.hpp>
#ifdef BOOST_NO_CXX11_LAMBDAS
# error "lambda functions required"
#else
#include <boost/detail/lightweight_test.hpp>
#include <vector>
struct person {};
struct world {
void add_person(person const& a_person);
std::vector<person> persons_;
};
//[world_cxx11_lambda
#include <functional>
struct scope_exit {
scope_exit(std::function<void (void)> f) : f_(f) {}
~scope_exit(void) { f_(); }
private:
std::function<void (void)> f_;
};
void world::add_person(person const& a_person) {
bool commit = false;
persons_.push_back(a_person);
scope_exit on_exit1([&commit, this](void) { // Use C++11 lambda.
if(!commit) persons_.pop_back(); // `persons_` via captured `this`.
});
// ...
commit = true;
}
//]
int main(void) {
world w;
person p;
w.add_person(p);
BOOST_TEST(w.persons_.size() == 1);
return boost::report_errors();
}
#endif // LAMBDAS
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