1
2// Copyright (C) 2006-2009, 2012 Alexander Nasonov
3// Copyright (C) 2012 Lorenzo Caminiti
4// Distributed under the Boost Software License, Version 1.0
5// (see accompanying file LICENSE_1_0.txt or a copy at
6// http://www.boost.org/LICENSE_1_0.txt)
7// Home at http://www.boost.org/libs/scope_exit
8
9#include <boost/config.hpp>
10#ifdef BOOST_NO_CXX11_VARIADIC_MACROS
11# error "variadic macros required"
12#else
13
14#include <boost/scope_exit.hpp>
15#include <boost/typeof/typeof.hpp>
16#include <boost/typeof/std/vector.hpp>
17#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
18#include <boost/detail/lightweight_test.hpp>
19#include <boost/config.hpp>
20#include <vector>
21
22struct person {};
23BOOST_TYPEOF_REGISTER_TYPE(person)
24
25struct world {
26 void add_person(person const& a_person);
27 size_t population(void) const { return persons_.size(); }
28
29private:
30 std::vector<person> persons_;
31};
32BOOST_TYPEOF_REGISTER_TYPE(world)
33
34void world::add_person(person const& a_person) {
35 bool commit = false;
36
37 persons_.push_back(x: a_person);
38 //[world_this
39 BOOST_SCOPE_EXIT(&commit, this_) { // Capture object `this_`.
40 if(!commit) this_->persons_.pop_back();
41 } BOOST_SCOPE_EXIT_END
42 //]
43
44 // ...
45
46 commit = true;
47}
48
49int main(void) {
50 world w;
51 person p;
52 w.add_person(a_person: p);
53 BOOST_TEST(w.population() == 1);
54 return boost::report_errors();
55}
56
57#endif // variadic macros
58
59

source code of boost/libs/scope_exit/test/world_this.cpp