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- // 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
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