2 #ifndef BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED
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3 #define BOOST_MPL_AUX_LARGEST_INT_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: largest_int.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/if.hpp>
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18 #include <boost/mpl/int.hpp>
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19 #include <boost/mpl/aux_/config/integral.hpp>
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20 #include <boost/config.hpp>
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22 namespace boost { namespace mpl { namespace aux {
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24 template< typename T > struct integral_rank;
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26 template<> struct integral_rank<bool> : int_<1> {};
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27 template<> struct integral_rank<signed char> : int_<2> {};
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28 template<> struct integral_rank<char> : int_<3> {};
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29 template<> struct integral_rank<unsigned char> : int_<4> {};
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30 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
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31 template<> struct integral_rank<wchar_t> : int_<5> {};
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33 template<> struct integral_rank<short> : int_<6> {};
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34 template<> struct integral_rank<unsigned short> : int_<7> {};
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35 template<> struct integral_rank<int> : int_<8> {};
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36 template<> struct integral_rank<unsigned int> : int_<9> {};
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37 template<> struct integral_rank<long> : int_<10> {};
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38 template<> struct integral_rank<unsigned long> : int_<11> {};
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40 #if defined(BOOST_HAS_LONG_LONG)
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41 template<> struct integral_rank<long_long_type> : int_<12> {};
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42 template<> struct integral_rank<ulong_long_type>: int_<13> {};
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45 template< typename T1, typename T2 > struct largest_int
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46 #if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
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48 ( integral_rank<T1>::value >= integral_rank<T2>::value )
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55 enum { rank1 = integral_rank<T1>::value };
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56 enum { rank2 = integral_rank<T2>::value };
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57 typedef typename if_c< (rank1 >= rank2),T1,T2 >::type type;
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63 #endif // BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED
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