1 2 #ifndef BOOST_MPL_AUX_YES_NO_HPP_INCLUDED 3 #define BOOST_MPL_AUX_YES_NO_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2000-2004 6 // 7 // Distributed under the Boost Software License, Version 1.0. 8 // (See accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 // 11 // See http://www.boost.org/libs/mpl for documentation. 12 13 // $Id: yes_no.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ 14 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $ 15 // $Revision: 49267 $ 16 17 #include <boost/mpl/aux_/nttp_decl.hpp> 18 #include <boost/mpl/aux_/config/arrays.hpp> 19 #include <boost/mpl/aux_/config/msvc.hpp> 20 #include <boost/mpl/aux_/config/workaround.hpp> 21 22 23 namespace boost { namespace mpl { namespace aux { 24 25 typedef char (&no_tag)[1]; 26 typedef char (&yes_tag)[2]; 27 28 template< bool C_ > struct yes_no_tag 29 { 30 typedef no_tag type; 31 }; 32 33 template<> struct yes_no_tag<true> 34 { 35 typedef yes_tag type; 36 }; 37 38 39 template< BOOST_MPL_AUX_NTTP_DECL(long, n) > struct weighted_tag 40 { 41 #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) 42 typedef char (&type)[n]; 43 #else 44 char buf[n]; 45 typedef weighted_tag type; 46 #endif 47 }; 48 49 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES) 50 template<> struct weighted_tag<0> 51 { 52 typedef char (&type)[1]; 53 }; 54 #endif 55 56 }}} 57 58 #endif // BOOST_MPL_AUX_YES_NO_HPP_INCLUDED 59