1 2 // Copyright (C) 2009-2012 Lorenzo Caminiti 3 // Distributed under the Boost Software License, Version 1.0 4 // (see accompanying file LICENSE_1_0.txt or a copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 // Home at http://www.boost.org/libs/local_function 7 8 #ifndef CONST_BLOCK_HPP_ 9 #define CONST_BLOCK_HPP_ 10 11 #include <boost/local_function.hpp> 12 #include <boost/local_function/detail/preprocessor/void_list.hpp> 13 #include <boost/local_function/detail/preprocessor/line_counter.hpp> 14 #include <boost/preprocessor/list/for_each_i.hpp> 15 #include <boost/preprocessor/list/adt.hpp> 16 #include <boost/preprocessor/tuple/eat.hpp> 17 #include <boost/preprocessor/punctuation/comma_if.hpp> 18 #include <boost/preprocessor/control/iif.hpp> 19 #include <boost/preprocessor/cat.hpp> 20 21 // PRIVATE // 22 23 #define CONST_BLOCK_BIND_(r, unused, i, var) \ 24 BOOST_PP_COMMA_IF(i) const bind& var 25 26 //[const_block_macro 27 #define CONST_BLOCK_(variables) \ 28 void BOOST_LOCAL_FUNCTION( \ 29 BOOST_PP_IIF(BOOST_PP_LIST_IS_NIL(variables), \ 30 void BOOST_PP_TUPLE_EAT(3) \ 31 , \ 32 BOOST_PP_LIST_FOR_EACH_I \ 33 )(CONST_BLOCK_BIND_, ~, variables) \ 34 ) 35 //] 36 37 //[const_block_end_macro 38 #define CONST_BLOCK_END_(id) \ 39 BOOST_LOCAL_FUNCTION_NAME(BOOST_PP_CAT(const_block_, id)) \ 40 BOOST_PP_CAT(const_block_, id)(); /* call local function immediately */ 41 //] 42 43 // PUBLIC // 44 45 // Arguments `void | var1, var2, ... | (var1) (var2) ...`. 46 #ifdef BOOST_NO_CXX11_VARIADIC_MACROS 47 # define CONST_BLOCK(void_or_seq) \ 48 CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(void_or_seq)) 49 #else 50 # define CONST_BLOCK(...) \ 51 CONST_BLOCK_(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(__VA_ARGS__)) 52 #endif 53 54 #define CONST_BLOCK_END \ 55 CONST_BLOCK_END_(BOOST_LOCAL_FUNCTION_DETAIL_PP_LINE_COUNTER) 56 57 #endif // #include guard 58 59