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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
- #ifndef CONST_BLOCK_HPP_
- #define CONST_BLOCK_HPP_
- #include <boost/local_function.hpp>
- #include <boost/local_function/detail/preprocessor/void_list.hpp>
- #include <boost/local_function/detail/preprocessor/line_counter.hpp>
- #include <boost/preprocessor/list/for_each_i.hpp>
- #include <boost/preprocessor/list/adt.hpp>
- #include <boost/preprocessor/tuple/eat.hpp>
- #include <boost/preprocessor/punctuation/comma_if.hpp>
- #include <boost/preprocessor/control/iif.hpp>
- #include <boost/preprocessor/cat.hpp>
- // PRIVATE //
- #define CONST_BLOCK_BIND_(r, unused, i, var) \
- BOOST_PP_COMMA_IF(i) const bind& var
-
- //[const_block_macro
- #define CONST_BLOCK_(variables) \
- void BOOST_LOCAL_FUNCTION( \
- BOOST_PP_IIF(BOOST_PP_LIST_IS_NIL(variables), \
- void BOOST_PP_TUPLE_EAT(3) \
- , \
- BOOST_PP_LIST_FOR_EACH_I \
- )(CONST_BLOCK_BIND_, ~, variables) \
- )
- //]
- //[const_block_end_macro
- #define CONST_BLOCK_END_(id) \
- BOOST_LOCAL_FUNCTION_NAME(BOOST_PP_CAT(const_block_, id)) \
- BOOST_PP_CAT(const_block_, id)(); /* call local function immediately */
- //]
- // PUBLIC //
- // Arguments `void | var1, var2, ... | (var1) (var2) ...`.
- #ifdef BOOST_NO_CXX11_VARIADIC_MACROS
- # define CONST_BLOCK(void_or_seq) \
- CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(void_or_seq))
- #else
- # define CONST_BLOCK(...) \
- CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(__VA_ARGS__))
- #endif
- #define CONST_BLOCK_END \
- CONST_BLOCK_END_(BOOST_LOCAL_FUNCTION_DETAIL_PP_LINE_COUNTER)
- #endif // #include guard
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