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 macro 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 <vector>
20
21struct person {};
22BOOST_TYPEOF_REGISTER_TYPE(person)
23
24template<typename Person>
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_TEMPLATE(world, 1)
33
34//[world_tpl
35template<typename Person>
36void world<Person>::add_person(Person const& a_person) {
37 bool commit = false;
38 persons_.push_back(a_person);
39
40 BOOST_SCOPE_EXIT_TPL(&commit, this_) { // Use `_TPL` postfix.
41 if(!commit) this_->persons_.pop_back();
42 } BOOST_SCOPE_EXIT_END
43
44 // ...
45
46 commit = true;
47}
48//]
49
50int main(void) {
51 world<person> w;
52 person p;
53 w.add_person(a_person: p);
54 BOOST_TEST(w.population() == 1);
55 return boost::report_errors();
56}
57
58#endif // variadic macros
59
60

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