55 lines
1.2 KiB
C++
55 lines
1.2 KiB
C++
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#ifndef BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED
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#define BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See 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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// $Id: is_even.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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// $Revision: 49267 $
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/aux_/na_spec.hpp>
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#include <boost/mpl/aux_/lambda_support.hpp>
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#include <boost/mpl/aux_/config/msvc.hpp>
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#include <boost/mpl/aux_/config/workaround.hpp>
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namespace boost { namespace mpl {
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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namespace aux
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{
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template <class N>
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struct is_even_base
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{
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enum { value = (N::value % 2) == 0 };
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typedef bool_<value> type;
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};
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}
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#endif
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template<
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typename BOOST_MPL_AUX_NA_PARAM(N)
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>
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struct is_even
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
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: aux::is_even_base<N>::type
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#else
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: bool_<((N::value % 2) == 0)>
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#endif
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{
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BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_even,(N))
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};
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BOOST_MPL_AUX_NA_SPEC(1, is_even)
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}}
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#endif // BOOST_MPL_MATH_IS_EVEN_HPP_INCLUDED
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