48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
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#ifndef BOOST_MPL_NEGATE_HPP_INCLUDED
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#define BOOST_MPL_NEGATE_HPP_INCLUDED
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// + file: boost/mpl/negate.hpp
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// + last modified: 25/feb/03
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// Copyright (c) 2000-03
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// Aleksey Gurtovoy
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#include "boost/mpl/integral_c.hpp"
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#include "boost/mpl/aux_/typeof.hpp"
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#include "boost/mpl/aux_/void_spec.hpp"
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#include "boost/mpl/aux_/lambda_support.hpp"
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#include "boost/config.hpp"
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namespace boost {
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namespace mpl {
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template<
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typename BOOST_MPL_AUX_VOID_SPEC_PARAM(T)
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>
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struct negate
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{
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typedef BOOST_MPL_AUX_TYPEOF(T,T::value) value_type;
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BOOST_STATIC_CONSTANT(value_type, value = (-T::value));
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#if !defined(__BORLANDC__)
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typedef integral_c<value_type, value> type;
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#else
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typedef integral_c<value_type, (-T::value)> type;
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#endif
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (T))
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};
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BOOST_MPL_AUX_VOID_SPEC(1,negate)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_NEGATE_HPP_INCLUDED
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