forked from boostorg/mpl
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/arithmetic/negate.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_MPL_ARITHMETIC_NEGATE_HPP_INCLUDED
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#define BOOST_MPL_ARITHMETIC_NEGATE_HPP_INCLUDED
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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/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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};
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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_ARITHMETIC_NEGATE_HPP_INCLUDED
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