1
2 // Copyright (C) 2009-2012 Lorenzo Caminiti
3 // Distributed under the Boost Software License, Version 1.0
4 // (see accompanying file LICENSE_1_0.txt or a copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6 // Home at http://www.boost.org/libs/local_function
7
8 #include <boost/config.hpp>
9 #ifdef BOOST_NO_CXX11_VARIADIC_MACROS
10 # error "variadic macros required"
11 #else
12
13 #include <boost/local_function.hpp>
14 #include <boost/preprocessor/cat.hpp>
15 #include <boost/detail/lightweight_test.hpp>
16 #include <iostream>
17
18 //[same_line
19 #define LOCAL_INC_DEC(offset) \
20 int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(inc, __LINE__), /* unique ID */ \
21 const bind offset, const int x) { \
22 return x + offset; \
23 } BOOST_LOCAL_FUNCTION_NAME(inc) \
24 \
25 int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(dec, __LINE__), \
26 const bind offset, const int x) { \
27 return x - offset; \
28 } BOOST_LOCAL_FUNCTION_NAME(dec)
29
30 #define LOCAL_INC_DEC_TPL(offset) \
31 T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(inc, __LINE__), \
32 const bind offset, const T x) { \
33 return x + offset; \
34 } BOOST_LOCAL_FUNCTION_NAME_TPL(inc) \
35 \
36 T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(dec, __LINE__), \
37 const bind offset, const T x) { \
38 return x - offset; \
39 } BOOST_LOCAL_FUNCTION_NAME_TPL(dec)
40
41 template<typename T>
f(T & delta)42 void f(T& delta) {
43 LOCAL_INC_DEC_TPL(delta) // Multiple local functions on same line.
44 BOOST_TEST(dec(inc(123)) == 123);
45 }
46
main(void)47 int main(void) {
48 int delta = 10;
49 LOCAL_INC_DEC(delta) // Multiple local functions on same line.
50 BOOST_TEST(dec(inc(123)) == 123);
51 f(delta);
52 return boost::report_errors();
53 }
54 //]
55
56 #endif // VARIADIC_MACROS
57
58