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