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1 |
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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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4 |
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5 // Copyright Aleksey Gurtovoy 2000-2004 |
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6 // |
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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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10 // |
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11 // See http://www.boost.org/libs/mpl for documentation. |
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12 |
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13 // $Source: /cvsroot/boost/boost/boost/mpl/aux_/largest_int.hpp,v $ |
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14 // $Date: 2004/09/19 03:08:53 $ |
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15 // $Revision: 1.5 $ |
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16 |
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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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21 |
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22 namespace boost { namespace mpl { namespace aux { |
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23 |
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24 template< typename T > struct integral_rank; |
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25 |
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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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32 #endif |
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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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39 |
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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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43 #endif |
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44 |
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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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47 : if_c< |
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48 ( integral_rank<T1>::value >= integral_rank<T2>::value ) |
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49 , T1 |
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50 , T2 |
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51 > |
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52 { |
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53 #else |
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54 { |
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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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58 #endif |
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59 }; |
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60 |
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61 }}} |
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62 |
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63 #endif // BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED |