sl@0: 
sl@0: #ifndef BOOST_MPL_NEGATE_HPP_INCLUDED
sl@0: #define BOOST_MPL_NEGATE_HPP_INCLUDED
sl@0: 
sl@0: // Copyright Aleksey Gurtovoy 2000-2004
sl@0: //
sl@0: // Distributed under the Boost Software License, Version 1.0. 
sl@0: // (See accompanying file LICENSE_1_0.txt or copy at 
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: //
sl@0: // See http://www.boost.org/libs/mpl for documentation.
sl@0: 
sl@0: // $Source: /cvsroot/boost/boost/boost/mpl/negate.hpp,v $
sl@0: // $Date: 2004/09/07 09:06:08 $
sl@0: // $Revision: 1.4 $
sl@0: 
sl@0: #include <boost/mpl/integral_c.hpp>
sl@0: #include <boost/mpl/aux_/msvc_eti_base.hpp>
sl@0: #include <boost/mpl/aux_/na_spec.hpp>
sl@0: #include <boost/mpl/aux_/lambda_support.hpp>
sl@0: #include <boost/mpl/aux_/config/eti.hpp>
sl@0: #include <boost/mpl/aux_/config/integral.hpp>
sl@0: #include <boost/mpl/aux_/config/static_constant.hpp>
sl@0: 
sl@0: namespace boost { namespace mpl {
sl@0: 
sl@0: template< typename Tag > struct negate_impl;
sl@0: 
sl@0: template< typename T > struct negate_tag
sl@0: {
sl@0:     typedef typename T::tag type;
sl@0: };
sl@0: 
sl@0: template<
sl@0:       typename BOOST_MPL_AUX_NA_PARAM(N)
sl@0:     >
sl@0: struct negate
sl@0: #if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
sl@0:     : negate_impl<
sl@0:           typename negate_tag<N>::type
sl@0:         >::template apply<N>::type
sl@0: #else
sl@0:     : aux::msvc_eti_base< typename apply_wrap1<
sl@0:           negate_impl< typename negate_tag<N>::type >
sl@0:         , N
sl@0:         >::type >::type
sl@0: #endif
sl@0: {
sl@0:     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (N))
sl@0: };
sl@0: 
sl@0: BOOST_MPL_AUX_NA_SPEC(1, negate)
sl@0: 
sl@0: 
sl@0: #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
sl@0: namespace aux {
sl@0: template< typename T, T n > struct negate_wknd
sl@0: {
sl@0:     BOOST_STATIC_CONSTANT(T, value = -n);
sl@0:     typedef integral_c<T,value> type;
sl@0: };
sl@0: }
sl@0: #endif
sl@0: 
sl@0: template<>
sl@0: struct negate_impl<integral_c_tag>
sl@0: {
sl@0: #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
sl@0:     template< typename N > struct apply
sl@0:         : aux::negate_wknd< typename N::value_type, N::value >
sl@0: #else
sl@0:     template< typename N > struct apply
sl@0:         : integral_c< typename N::value_type, (-N::value) >
sl@0: #endif    
sl@0:     {
sl@0:     };
sl@0: };
sl@0: 
sl@0: }}
sl@0: 
sl@0: #endif // BOOST_MPL_NEGATE_HPP_INCLUDED