| |
| // 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/config.hpp> |
| #ifdef BOOST_NO_CXX11_VARIADIC_MACROS |
| # error "variadic macros required" |
| #else |
| |
| #include <boost/scope_exit.hpp> |
| #include <boost/preprocessor/cat.hpp> |
| #include <boost/detail/lightweight_test.hpp> |
| |
| //[same_line |
| #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) // Multiple scope exits on same line. |
| BOOST_TEST(x == 0); |
| } |
| |
| int main(void) { |
| int x = 0, delta = 10; |
| |
| { |
| SCOPE_EXIT_INC_DEC(x, delta) // Multiple scope exits on same line. |
| } |
| BOOST_TEST(x == 0); |
| |
| f(x, delta); |
| |
| #ifndef BOOST_NO_CXX11_LAMBDAS |
| { |
| SCOPE_EXIT_ALL_INC_DEC(x, delta) // Multiple scope exits on same line. |
| } |
| BOOST_TEST(x == 0); |
| #endif // LAMBDAS |
| |
| return boost::report_errors(); |
| } |
| //] |
| |
| #endif // variadic macros |
| |