| 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/typeof/std/string.hpp> |
| 16 | #include <boost/detail/lightweight_test.hpp> |
| 17 | #include <string> |
| 18 | |
| 19 | boost::function<void (const std::string&)> set; |
| 20 | boost::function<const std::string& (void)> get; |
| 21 | |
| 22 | void action(void) { |
| 23 | // State `message` hidden behind access functions from here. |
| 24 | BOOST_TEST(get() == "abc"); |
| 25 | set("xyz"); |
| 26 | BOOST_TEST(get() == "xyz"); |
| 27 | } |
| 28 | |
| 29 | int main(void) { |
| 30 | std::string message = "abc"; // Reference valid where closure used. |
| 31 | |
| 32 | void BOOST_LOCAL_FUNCTION(bind& message, const std::string& text) { |
| 33 | message = text; |
| 34 | } BOOST_LOCAL_FUNCTION_NAME(s) |
| 35 | set = s; |
| 36 | |
| 37 | const std::string& BOOST_LOCAL_FUNCTION(const bind& message) { |
| 38 | return message; |
| 39 | } BOOST_LOCAL_FUNCTION_NAME(g) |
| 40 | get = g; |
| 41 | |
| 42 | action(); |
| 43 | return boost::report_errors(); |
| 44 | } |
| 45 | |
| 46 | #endif // VARIADIC_MACROS |
| 47 | |
| 48 |