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/function.hpp>
15 #include <boost/detail/lightweight_test.hpp>
16 
inc(int & value)17 boost::function<int (void)> inc(int& value) {
18     int BOOST_LOCAL_FUNCTION(bind& value) {
19         return ++value;
20     } BOOST_LOCAL_FUNCTION_NAME(i)
21     return i;
22 }
23 
main(void)24 int main(void) {
25     int value1 = 0; // Reference valid in scope where closure is used.
26     boost::function<int (void)> inc1 = inc(value1);
27     int value2 = 0;
28     boost::function<int (void)> inc2 = inc(value2);
29 
30     BOOST_TEST(inc1() == 1);
31     BOOST_TEST(inc1() == 2);
32     BOOST_TEST(inc2() == 1);
33     BOOST_TEST(inc1() == 3);
34     return boost::report_errors();
35 }
36 
37 #endif // VARIADIC_MACROS
38 
39