2 #ifndef BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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3 #define BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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5 // Copyright Aleksey Gurtovoy 2000-2004
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7 // Distributed under the Boost Software License, Version 1.0.
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8 // (See accompanying file LICENSE_1_0.txt or copy at
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9 // http://www.boost.org/LICENSE_1_0.txt)
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11 // See http://www.boost.org/libs/mpl for documentation.
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13 // $Id: yes_no.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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15 // $Revision: 49267 $
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17 #include <boost/mpl/aux_/nttp_decl.hpp>
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18 #include <boost/mpl/aux_/config/arrays.hpp>
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19 #include <boost/mpl/aux_/config/msvc.hpp>
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20 #include <boost/mpl/aux_/config/workaround.hpp>
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23 namespace boost { namespace mpl { namespace aux {
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25 typedef char (&no_tag)[1];
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26 typedef char (&yes_tag)[2];
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28 template< bool C_ > struct yes_no_tag
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30 typedef no_tag type;
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33 template<> struct yes_no_tag<true>
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35 typedef yes_tag type;
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39 template< BOOST_MPL_AUX_NTTP_DECL(long, n) > struct weighted_tag
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41 #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
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42 typedef char (&type)[n];
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45 typedef weighted_tag type;
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49 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
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50 template<> struct weighted_tag<0>
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52 typedef char (&type)[1];
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58 #endif // BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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