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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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