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1 | // (C) Copyright Gennadiy Rozental 2001. |
2 | // Distributed under the Boost Software License, Version 1.0. | |
3 | // (See accompanying file LICENSE_1_0.txt or copy at | |
4 | // http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | // See http://www.boost.org/libs/test for the library home page. | |
7 | // | |
8 | //!@file | |
9 | //!@brief few helpers for working with variadic macros | |
10 | // *************************************************************************** | |
11 | ||
12 | #ifndef BOOST_TEST_PP_VARIADIC_HPP_021515GER | |
13 | #define BOOST_TEST_PP_VARIADIC_HPP_021515GER | |
14 | ||
15 | // Boost | |
16 | #include <boost/preprocessor/control/iif.hpp> | |
17 | #include <boost/preprocessor/comparison/equal.hpp> | |
18 | #include <boost/preprocessor/variadic/size.hpp> | |
19 | ||
20 | //____________________________________________________________________________// | |
21 | ||
22 | #if BOOST_PP_VARIADICS | |
23 | ||
24 | #if BOOST_PP_VARIADICS_MSVC | |
25 | # define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) BOOST_PP_CAT( tool (__VA_ARGS__), ) | |
26 | #else | |
27 | # define BOOST_TEST_INVOKE_VARIADIC( tool, ... ) tool (__VA_ARGS__) | |
28 | #endif | |
29 | ||
30 | //____________________________________________________________________________// | |
31 | ||
32 | /// if sizeof(__VA_ARGS__) == N: F1(__VA_ARGS__) | |
33 | /// else: F2(__VA_ARGS__) | |
34 | #define BOOST_TEST_INVOKE_IF_N_ARGS( N, F1, F2, ... ) \ | |
35 | BOOST_TEST_INVOKE_VARIADIC( \ | |
36 | BOOST_PP_IIF( \ | |
37 | BOOST_PP_EQUAL(BOOST_PP_VARIADIC_SIZE(__VA_ARGS__), N), \ | |
38 | F1, \ | |
39 | F2), \ | |
40 | __VA_ARGS__ ) \ | |
41 | /**/ | |
42 | ||
43 | //____________________________________________________________________________// | |
44 | ||
45 | #endif /* BOOST_PP_VARIADICS */ | |
46 | ||
47 | #endif // BOOST_TEST_PP_VARIADIC_HPP_021515GER | |
48 | ||
49 | // EOF |