imgtools/imglib/boostlibrary/boost/mpl/negate.hpp
author Richard Taylor <richard.i.taylor@nokia.com>
Thu, 03 Dec 2009 14:59:48 +0000
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#ifndef BOOST_MPL_NEGATE_HPP_INCLUDED
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#define BOOST_MPL_NEGATE_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0. 
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// (See accompanying file LICENSE_1_0.txt or copy at 
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id: negate.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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// $Revision: 49267 $
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#include <boost/mpl/integral_c.hpp>
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#include <boost/mpl/aux_/msvc_eti_base.hpp>
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#include <boost/mpl/aux_/na_spec.hpp>
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#include <boost/mpl/aux_/lambda_support.hpp>
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#include <boost/mpl/aux_/config/eti.hpp>
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#include <boost/mpl/aux_/config/integral.hpp>
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#include <boost/mpl/aux_/config/static_constant.hpp>
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namespace boost { namespace mpl {
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template< typename Tag > struct negate_impl;
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template< typename T > struct negate_tag
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{
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    typedef typename T::tag type;
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};
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template<
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      typename BOOST_MPL_AUX_NA_PARAM(N)
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    >
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struct negate
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#if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
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    : negate_impl<
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          typename negate_tag<N>::type
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        >::template apply<N>::type
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#else
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    : aux::msvc_eti_base< typename apply_wrap1<
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          negate_impl< typename negate_tag<N>::type >
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        , N
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        >::type >::type
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#endif
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{
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    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (N))
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};
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BOOST_MPL_AUX_NA_SPEC(1, negate)
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#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
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namespace aux {
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template< typename T, T n > struct negate_wknd
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{
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    BOOST_STATIC_CONSTANT(T, value = -n);
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    typedef integral_c<T,value> type;
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};
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}
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#endif
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template<>
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struct negate_impl<integral_c_tag>
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{
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#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
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    template< typename N > struct apply
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        : aux::negate_wknd< typename N::value_type, N::value >
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#else
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    template< typename N > struct apply
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        : integral_c< typename N::value_type, (-N::value) >
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#endif    
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    {
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    };
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};
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}}
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#endif // BOOST_MPL_NEGATE_HPP_INCLUDED