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/preprocessor/cat.hpp> |
11 | #include <boost/config.hpp> |
12 | #include <boost/detail/lightweight_test.hpp> |
13 | |
14 | #define SCOPE_EXIT_INC_DEC(variable, offset) \ |
15 | BOOST_SCOPE_EXIT_ID(BOOST_PP_CAT(inc, __LINE__), /* unique ID */ \ |
16 | (&variable) (offset) ) { \ |
17 | variable += offset; \ |
18 | } BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(inc, __LINE__)) \ |
19 | \ |
20 | BOOST_SCOPE_EXIT_ID(BOOST_PP_CAT(dec, __LINE__), \ |
21 | (&variable) (offset) ) { \ |
22 | variable -= offset; \ |
23 | } BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(dec, __LINE__)) |
24 | |
25 | #define SCOPE_EXIT_INC_DEC_TPL(variable, offset) \ |
26 | BOOST_SCOPE_EXIT_ID_TPL(BOOST_PP_CAT(inc, __LINE__), \ |
27 | (&variable) (offset) ) { \ |
28 | variable += offset; \ |
29 | } BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(inc, __LINE__)) \ |
30 | \ |
31 | BOOST_SCOPE_EXIT_ID_TPL(BOOST_PP_CAT(dec, __LINE__), \ |
32 | (&variable) (offset) ) { \ |
33 | variable -= offset; \ |
34 | } BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(dec, __LINE__)) |
35 | |
36 | #define SCOPE_EXIT_ALL_INC_DEC(variable, offset) \ |
37 | BOOST_SCOPE_EXIT_ALL_ID(BOOST_PP_CAT(inc, __LINE__), \ |
38 | (=) (&variable) ) { \ |
39 | variable += offset; \ |
40 | }; \ |
41 | BOOST_SCOPE_EXIT_ALL_ID(BOOST_PP_CAT(dec, __LINE__), \ |
42 | (=) (&variable) ) { \ |
43 | variable -= offset; \ |
44 | }; |
45 | |
46 | template<typename T> |
47 | void f(T& x, T& delta) { |
48 | SCOPE_EXIT_INC_DEC_TPL(x, delta) |
49 | BOOST_TEST(x == 0); |
50 | } |
51 | |
52 | int main(void) { |
53 | int x = 0, delta = 10; |
54 | |
55 | { |
56 | SCOPE_EXIT_INC_DEC(x, delta) |
57 | } |
58 | BOOST_TEST(x == 0); |
59 | |
60 | f(x, delta); |
61 | |
62 | #ifndef BOOST_NO_CXX11_LAMBDAS |
63 | { |
64 | SCOPE_EXIT_ALL_INC_DEC(x, delta) |
65 | } |
66 | BOOST_TEST(x == 0); |
67 | #endif // LAMBDAS |
68 | |
69 | return boost::report_errors(); |
70 | } |
71 | |
72 | |