| |
| // Copyright (C) 2009-2012 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/local_function |
| |
| #include <boost/config.hpp> |
| #ifdef BOOST_NO_CXX11_VARIADIC_MACROS |
| # error "variadic macros required" |
| #else |
| |
| #include <boost/local_function.hpp> |
| #include <boost/preprocessor/cat.hpp> |
| #include <boost/detail/lightweight_test.hpp> |
| #include <iostream> |
| |
| //[same_line |
| #define LOCAL_INC_DEC(offset) \ |
| int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(inc, __LINE__), /* unique ID */ \ |
| const bind offset, const int x) { \ |
| return x + offset; \ |
| } BOOST_LOCAL_FUNCTION_NAME(inc) \ |
| \ |
| int BOOST_LOCAL_FUNCTION_ID(BOOST_PP_CAT(dec, __LINE__), \ |
| const bind offset, const int x) { \ |
| return x - offset; \ |
| } BOOST_LOCAL_FUNCTION_NAME(dec) |
| |
| #define LOCAL_INC_DEC_TPL(offset) \ |
| T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(inc, __LINE__), \ |
| const bind offset, const T x) { \ |
| return x + offset; \ |
| } BOOST_LOCAL_FUNCTION_NAME_TPL(inc) \ |
| \ |
| T BOOST_LOCAL_FUNCTION_ID_TPL(BOOST_PP_CAT(dec, __LINE__), \ |
| const bind offset, const T x) { \ |
| return x - offset; \ |
| } BOOST_LOCAL_FUNCTION_NAME_TPL(dec) |
| |
| template<typename T> |
| void f(T& delta) { |
| LOCAL_INC_DEC_TPL(delta) // Multiple local functions on same line. |
| BOOST_TEST(dec(inc(123)) == 123); |
| } |
| |
| int main(void) { |
| int delta = 10; |
| LOCAL_INC_DEC(delta) // Multiple local functions on same line. |
| BOOST_TEST(dec(inc(123)) == 123); |
| f(delta); |
| return boost::report_errors(); |
| } |
| //] |
| |
| #endif // VARIADIC_MACROS |
| |