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|---|---|---|
| 7c673cae FG |
1 | |
| 2 | #ifndef BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED | |
| 3 | #define BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED | |
| 4 | ||
| 5 | // Copyright Aleksey Gurtovoy 2000-2004 | |
| 6 | // | |
| 7 | // Distributed under the Boost Software License, Version 1.0. | |
| 8 | // (See accompanying file LICENSE_1_0.txt or copy at | |
| 9 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 10 | // | |
| 11 | // See http://www.boost.org/libs/mpl for documentation. | |
| 12 | ||
| 13 | // $Id$ | |
| 14 | // $Date$ | |
| 15 | // $Revision$ | |
| 16 | ||
| 17 | #include <boost/mpl/bool.hpp> | |
| 18 | #include <boost/mpl/aux_/na_spec.hpp> | |
| 19 | #include <boost/mpl/aux_/lambda_support.hpp> | |
| 20 | #include <boost/mpl/aux_/config/msvc.hpp> | |
| 21 | #include <boost/mpl/aux_/config/workaround.hpp> | |
| 22 | ||
| 23 | namespace boost { namespace mpl { | |
| 24 | ||
| 25 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) | |
| 26 | namespace aux | |
| 27 | { | |
| 28 | template <class N> | |
| 29 | struct is_even_base | |
| 30 | { | |
| 31 | enum { value = (N::value % 2) == 0 }; | |
| 32 | typedef bool_<value> type; | |
| 33 | }; | |
| 34 | } | |
| 35 | #endif | |
| 36 | ||
| 37 | template< | |
| 38 | typename BOOST_MPL_AUX_NA_PARAM(N) | |
| 39 | > | |
| 40 | struct is_even | |
| 41 | #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) | |
| 42 | : aux::is_even_base<N>::type | |
| 43 | #else | |
| 44 | : bool_<((N::value % 2) == 0)> | |
| 45 | #endif | |
| 46 | { | |
| 47 | BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_even,(N)) | |
| 48 | }; | |
| 49 | ||
| 50 | BOOST_MPL_AUX_NA_SPEC(1, is_even) | |
| 51 | ||
| 52 | }} | |
| 53 | ||
| 54 | #endif // BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED |