Chris@16: 
Chris@16: #ifndef BOOST_MPL_NEGATE_HPP_INCLUDED
Chris@16: #define BOOST_MPL_NEGATE_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2000-2004
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. 
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/integral_c.hpp>
Chris@16: #include <boost/mpl/aux_/msvc_eti_base.hpp>
Chris@16: #include <boost/mpl/aux_/na_spec.hpp>
Chris@16: #include <boost/mpl/aux_/lambda_support.hpp>
Chris@16: #include <boost/mpl/aux_/config/eti.hpp>
Chris@16: #include <boost/mpl/aux_/config/integral.hpp>
Chris@16: #include <boost/mpl/aux_/config/static_constant.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: template< typename Tag > struct negate_impl;
Chris@16: 
Chris@16: template< typename T > struct negate_tag
Chris@16: {
Chris@16:     typedef typename T::tag type;
Chris@16: };
Chris@16: 
Chris@16: template<
Chris@16:       typename BOOST_MPL_AUX_NA_PARAM(N)
Chris@16:     >
Chris@16: struct negate
Chris@16: #if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
Chris@16:     : negate_impl<
Chris@16:           typename negate_tag<N>::type
Chris@16:         >::template apply<N>::type
Chris@16: #else
Chris@16:     : aux::msvc_eti_base< typename apply_wrap1<
Chris@16:           negate_impl< typename negate_tag<N>::type >
Chris@16:         , N
Chris@16:         >::type >::type
Chris@16: #endif
Chris@16: {
Chris@16:     BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (N))
Chris@16: };
Chris@16: 
Chris@16: BOOST_MPL_AUX_NA_SPEC(1, negate)
Chris@16: 
Chris@16: 
Chris@16: #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
Chris@16: namespace aux {
Chris@16: template< typename T, T n > struct negate_wknd
Chris@16: {
Chris@16:     BOOST_STATIC_CONSTANT(T, value = -n);
Chris@16:     typedef integral_c<T,value> type;
Chris@16: };
Chris@16: }
Chris@16: #endif
Chris@16: 
Chris@16: template<>
Chris@16: struct negate_impl<integral_c_tag>
Chris@16: {
Chris@16: #if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
Chris@16:     template< typename N > struct apply
Chris@16:         : aux::negate_wknd< typename N::value_type, N::value >
Chris@16: #else
Chris@16:     template< typename N > struct apply
Chris@16:         : integral_c< typename N::value_type, (-N::value) >
Chris@16: #endif    
Chris@16:     {
Chris@16:     };
Chris@16: };
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_NEGATE_HPP_INCLUDED