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- // 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/local_function.hpp>
- #include <boost/preprocessor/cat.hpp>
- #include <boost/detail/lightweight_test.hpp>
- #include <iostream>
-
- #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) // Declare local functions on same line using `_ID`.
- BOOST_TEST(dec(inc(123)) == 123);
- f(delta);
- return boost::report_errors();
- }
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