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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/scope_exit.hpp>
10 #include <boost/typeof/typeof.hpp>
11 #include <boost/typeof/std/vector.hpp>
12 #include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP()
13 #include <boost/detail/lightweight_test.hpp>
14 #include <vector>
15 
16 struct person {};
17 BOOST_TYPEOF_REGISTER_TYPE(person)
18 
19 struct world_t;
20 BOOST_TYPEOF_REGISTER_TYPE(world_t)
21 
22 //[world_void
23 struct world_t {
24     std::vector<person> persons;
25     bool commit;
26 } world; // Global variable.
27 
add_person(person const & a_person)28 void add_person(person const& a_person) {
29     world.commit = false;
30     world.persons.push_back(a_person);
31 
32     BOOST_SCOPE_EXIT(void) { // No captures.
33         if(!world.commit) world.persons.pop_back();
34     } BOOST_SCOPE_EXIT_END
35 
36     // ...
37 
38     world.commit = true;
39 }
40 //]
41 
main(void)42 int main(void) {
43     person p;
44     add_person(p);
45     BOOST_TEST(world.persons.size() == 1);
46     return boost::report_errors();
47 }
48 
49