1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// 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/preprocessor/cat.hpp>
#include <boost/config.hpp>
#include <boost/detail/lightweight_test.hpp>
#define SCOPE_EXIT_INC_DEC(variable, offset) \
BOOST_SCOPE_EXIT_ID(BOOST_PP_CAT(inc, __LINE__), /* unique ID */ \
(&variable) (offset) ) { \
variable += offset; \
} BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(inc, __LINE__)) \
\
BOOST_SCOPE_EXIT_ID(BOOST_PP_CAT(dec, __LINE__), \
(&variable) (offset) ) { \
variable -= offset; \
} BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(dec, __LINE__))
#define SCOPE_EXIT_INC_DEC_TPL(variable, offset) \
BOOST_SCOPE_EXIT_ID_TPL(BOOST_PP_CAT(inc, __LINE__), \
(&variable) (offset) ) { \
variable += offset; \
} BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(inc, __LINE__)) \
\
BOOST_SCOPE_EXIT_ID_TPL(BOOST_PP_CAT(dec, __LINE__), \
(&variable) (offset) ) { \
variable -= offset; \
} BOOST_SCOPE_EXIT_END_ID(BOOST_PP_CAT(dec, __LINE__))
#define SCOPE_EXIT_ALL_INC_DEC(variable, offset) \
BOOST_SCOPE_EXIT_ALL_ID(BOOST_PP_CAT(inc, __LINE__), \
(=) (&variable) ) { \
variable += offset; \
}; \
BOOST_SCOPE_EXIT_ALL_ID(BOOST_PP_CAT(dec, __LINE__), \
(=) (&variable) ) { \
variable -= offset; \
};
template<typename T>
void f(T& x, T& delta) {
SCOPE_EXIT_INC_DEC_TPL(x, delta)
BOOST_TEST(x == 0);
}
int main(void) {
int x = 0, delta = 10;
{
SCOPE_EXIT_INC_DEC(x, delta)
}
BOOST_TEST(x == 0);
f(x, delta);
#ifndef BOOST_NO_CXX11_LAMBDAS
{
SCOPE_EXIT_ALL_INC_DEC(x, delta)
}
BOOST_TEST(x == 0);
#endif // LAMBDAS
return boost::report_errors();
}
|
