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| 2 | #ifndef BOOST_MPL_NEGATE_HPP_INCLUDED |
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| 3 | #define BOOST_MPL_NEGATE_HPP_INCLUDED |
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| 4 | |
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| 5 | // Copyright Aleksey Gurtovoy 2000-2004 |
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| 6 | // |
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| 7 | // Distributed under the Boost Software License, Version 1.0. |
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| 8 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 10 | // |
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| 11 | // See http://www.boost.org/libs/mpl for documentation. |
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| 12 | |
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| 13 | // $Source: /cvsroot/boost/boost/boost/mpl/negate.hpp,v $ |
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| 14 | // $Date: 2004/09/07 09:06:08 $ |
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| 15 | // $Revision: 1.4 $ |
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| 16 | |
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| 17 | #include <boost/mpl/integral_c.hpp> |
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| 18 | #include <boost/mpl/aux_/msvc_eti_base.hpp> |
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| 19 | #include <boost/mpl/aux_/na_spec.hpp> |
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| 20 | #include <boost/mpl/aux_/lambda_support.hpp> |
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| 21 | #include <boost/mpl/aux_/config/eti.hpp> |
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| 22 | #include <boost/mpl/aux_/config/integral.hpp> |
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| 23 | #include <boost/mpl/aux_/config/static_constant.hpp> |
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| 24 | |
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| 25 | namespace boost { namespace mpl { |
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| 26 | |
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| 27 | template< typename Tag > struct negate_impl; |
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| 28 | |
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| 29 | template< typename T > struct negate_tag |
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| 30 | { |
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| 31 | typedef typename T::tag type; |
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| 32 | }; |
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| 33 | |
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| 34 | template< |
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| 35 | typename BOOST_MPL_AUX_NA_PARAM(N) |
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| 36 | > |
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| 37 | struct negate |
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| 38 | #if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG) |
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| 39 | : negate_impl< |
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| 40 | typename negate_tag<N>::type |
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| 41 | >::template apply<N>::type |
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| 42 | #else |
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| 43 | : aux::msvc_eti_base< typename apply_wrap1< |
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| 44 | negate_impl< typename negate_tag<N>::type > |
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| 45 | , N |
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| 46 | >::type >::type |
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| 47 | #endif |
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| 48 | { |
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| 49 | BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (N)) |
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| 50 | }; |
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| 51 | |
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| 52 | BOOST_MPL_AUX_NA_SPEC(1, negate) |
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| 53 | |
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| 54 | |
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| 55 | #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC) |
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| 56 | namespace aux { |
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| 57 | template< typename T, T n > struct negate_wknd |
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| 58 | { |
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| 59 | BOOST_STATIC_CONSTANT(T, value = -n); |
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| 60 | typedef integral_c<T,value> type; |
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| 61 | }; |
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| 62 | } |
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| 63 | #endif |
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| 64 | |
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| 65 | template<> |
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| 66 | struct negate_impl<integral_c_tag> |
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| 67 | { |
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| 68 | #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC) |
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| 69 | template< typename N > struct apply |
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| 70 | : aux::negate_wknd< typename N::value_type, N::value > |
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| 71 | #else |
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| 72 | template< typename N > struct apply |
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| 73 | : integral_c< typename N::value_type, (-N::value) > |
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| 74 | #endif |
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| 75 | { |
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| 76 | }; |
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| 77 | }; |
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| 78 | |
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| 79 | }} |
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| 80 | |
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| 81 | #endif // BOOST_MPL_NEGATE_HPP_INCLUDED |
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