| |
| // 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 BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HPP_ |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HPP_ |
| |
| #include <boost/local_function/detail/preprocessor/keyword/void.hpp> |
| #include <boost/config.hpp> |
| #include <boost/preprocessor/cat.hpp> |
| #include <boost/preprocessor/control/iif.hpp> |
| #include <boost/preprocessor/comparison/equal.hpp> |
| #include <boost/preprocessor/tuple/to_list.hpp> |
| #include <boost/preprocessor/seq/size.hpp> |
| #include <boost/preprocessor/seq/to_tuple.hpp> |
| |
| // PRIVATE // |
| |
| // Argument: (token1)... |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_FROM_SEQ_(unused, seq) \ |
| BOOST_PP_TUPLE_TO_LIST(BOOST_PP_SEQ_SIZE(seq), BOOST_PP_SEQ_TO_TUPLE(seq)) |
| |
| // Token: void | token1 |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HANDLE_VOID_( \ |
| is_void_macro, token) \ |
| BOOST_PP_IIF(is_void_macro(token), \ |
| BOOST_PP_NIL \ |
| , \ |
| (token, BOOST_PP_NIL) \ |
| ) |
| |
| // Token: (a)(b)... | empty | void | token |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HANDLE_SEQ_( \ |
| is_void_macro, token) \ |
| BOOST_PP_IIF(BOOST_PP_IS_UNARY(token), /* unary paren (a)... */ \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_FROM_SEQ_ \ |
| , \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HANDLE_VOID_ \ |
| )(is_void_macro, token) |
| |
| #ifdef BOOST_NO_CXX11_VARIADIC_MACROS |
| |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_(is_void_macro, seq) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HANDLE_SEQ_(is_void_macro, seq) |
| |
| #else // VARIADICS |
| |
| // FUTURE: Replace this with BOOST_PP_VARIADIC_SIZE when and if |
| // BOOST_PP_VARIAIDCS detection will match !BOOST_NO_CXX11_VARIADIC_MACROS (for now |
| // Boost.Preprocessor and Boost.Config disagree on detecting compiler variadic |
| // support while this VARIADIC_SIZE works on compilers not detected by PP). |
| #if BOOST_MSVC |
| # define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_(...) \ |
| BOOST_PP_CAT(BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_I_(__VA_ARGS__, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1,),) |
| #else // MSVC |
| # define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_(...) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_I_(__VA_ARGS__, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1,) |
| #endif // MSVC |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_I_(e0, e1, e2, e3, e4, e5, e6, e7, e8, e9, e10, e11, e12, e13, e14, e15, e16, e17, e18, e19, e20, e21, e22, e23, e24, e25, e26, e27, e28, e29, e30, e31, e32, e33, e34, e35, e36, e37, e38, e39, e40, e41, e42, e43, e44, e45, e46, e47, e48, e49, e50, e51, e52, e53, e54, e55, e56, e57, e58, e59, e60, e61, e62, e63, size, ...) size |
| |
| // Argument: token1, ... |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_FROM_VARIADIC_(unused, ...) \ |
| BOOST_PP_TUPLE_TO_LIST( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_( \ |
| __VA_ARGS__), (__VA_ARGS__)) |
| |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_(is_void_macro, ...) \ |
| BOOST_PP_IIF(BOOST_PP_EQUAL( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_VARIADIC_SIZE_( \ |
| __VA_ARGS__), 1), \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_HANDLE_SEQ_ \ |
| , \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_FROM_VARIADIC_ \ |
| )(is_void_macro, __VA_ARGS__) |
| |
| #endif // VARIADICS |
| |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_NEVER_(tokens) \ |
| 0 /* void check always returns false */ |
| |
| // PUBLIC // |
| |
| // NOTE: Empty list must always be represented is void (which is also a way to |
| // specify no function parameter) and it can never be empty because (1) |
| // IS_EMPTY(&var) fails (because of the leading non alphanumeric symbol) and |
| // (2) some compilers (MSVC) fail to correctly pass empty macro parameters |
| // even if they support variadic macros. Therefore, always using void to |
| // represent is more portable. |
| |
| #ifdef BOOST_NO_CXX11_VARIADIC_MACROS |
| |
| // Expand `void | (a)(b)...` to pp-list `NIL | (a, (b, NIL))`. |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(sign) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_IS_VOID_BACK, sign) |
| |
| // Expand `(a)(b)...` to pp-list `(a, (b, NIL))`. |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_NON_VOID_LIST(seq) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_NEVER_, seq) |
| |
| #else // VARIADICS |
| |
| // Expand `void | (a)(b)... | a, b, ...` to pp-list `NIL | (a, (b, NIL))`. |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST(...) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_KEYWORD_IS_VOID_BACK, __VA_ARGS__) |
| |
| // Expand `(a)(b)... | a, b, ...` to pp-list `(a, (b, NIL))`. |
| #define BOOST_LOCAL_FUNCTION_DETAIL_PP_NON_VOID_LIST(...) \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_( \ |
| BOOST_LOCAL_FUNCTION_DETAIL_PP_VOID_LIST_NEVER_, __VA_ARGS__) |
| |
| #endif // VARIADICS |
| |
| #endif // #include guard |
| |