1 2 #ifndef BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED 3 #define BOOST_MPL_AUX_LARGEST_INT_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 // $Id$ 14 // $Date$ 15 // $Revision$ 16 17 #include <boost/mpl/if.hpp> 18 #include <boost/mpl/int.hpp> 19 #include <boost/mpl/aux_/config/integral.hpp> 20 #include <boost/config.hpp> 21 22 namespace boost { namespace mpl { namespace aux { 23 24 template< typename T > struct integral_rank; 25 26 template<> struct integral_rank<bool> : int_<1> {}; 27 template<> struct integral_rank<signed char> : int_<2> {}; 28 template<> struct integral_rank<char> : int_<3> {}; 29 template<> struct integral_rank<unsigned char> : int_<4> {}; 30 #if !defined(BOOST_NO_INTRINSIC_WCHAR_T) 31 template<> struct integral_rank<wchar_t> : int_<5> {}; 32 #endif 33 template<> struct integral_rank<short> : int_<6> {}; 34 template<> struct integral_rank<unsigned short> : int_<7> {}; 35 template<> struct integral_rank<int> : int_<8> {}; 36 template<> struct integral_rank<unsigned int> : int_<9> {}; 37 template<> struct integral_rank<long> : int_<10> {}; 38 template<> struct integral_rank<unsigned long> : int_<11> {}; 39 40 #if defined(BOOST_HAS_LONG_LONG) 41 template<> struct integral_rank<long_long_type> : int_<12> {}; 42 template<> struct integral_rank<ulong_long_type>: int_<13> {}; 43 #endif 44 45 template< typename T1, typename T2 > struct largest_int 46 #if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC) 47 : if_c< 48 ( integral_rank<T1>::value >= integral_rank<T2>::value ) 49 , T1 50 , T2 51 > 52 { 53 #else 54 { 55 enum { rank1 = integral_rank<T1>::value }; 56 enum { rank2 = integral_rank<T2>::value }; 57 typedef typename if_c< (rank1 >= rank2),T1,T2 >::type type; 58 #endif 59 }; 60 61 }}} 62 63 #endif // BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED 64