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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/scope_exit.hpp>
- #include <boost/typeof/typeof.hpp>
- #include <boost/typeof/std/vector.hpp>
- #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
- #include <boost/detail/lightweight_test.hpp>
- #include <vector>
- struct person {};
- BOOST_TYPEOF_REGISTER_TYPE(person)
- template<typename Person>
- struct world {
- void add_person(Person const& a_person);
- size_t population(void) const { return persons_.size(); }
- private:
- std::vector<Person> persons_;
- };
- BOOST_TYPEOF_REGISTER_TEMPLATE(world, 1)
- template<typename Person>
- void world<Person>::add_person(Person const& a_person) {
- bool commit = false;
- persons_.push_back(a_person);
- BOOST_SCOPE_EXIT_TPL( (&commit) (this_) ) {
- if(!commit) this_->persons_.pop_back();
- } BOOST_SCOPE_EXIT_END
- // ...
- commit = true;
- }
- int main(void) {
- world<person> w;
- person p;
- w.add_person(p);
- BOOST_TEST(w.population() == 1);
- return boost::report_errors();
- }
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