williamr@2: 
williamr@2: #ifndef BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED
williamr@2: #define BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED
williamr@2: 
williamr@2: // Copyright Aleksey Gurtovoy 2000-2004
williamr@2: //
williamr@2: // Distributed under the Boost Software License, Version 1.0. 
williamr@2: // (See accompanying file LICENSE_1_0.txt or copy at 
williamr@2: // http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: // See http://www.boost.org/libs/mpl for documentation.
williamr@2: 
williamr@2: // $Source: /cvsroot/boost/boost/boost/mpl/aux_/largest_int.hpp,v $
williamr@2: // $Date: 2004/09/19 03:08:53 $
williamr@2: // $Revision: 1.5 $
williamr@2: 
williamr@2: #include <boost/mpl/if.hpp>
williamr@2: #include <boost/mpl/int.hpp>
williamr@2: #include <boost/mpl/aux_/config/integral.hpp>
williamr@2: #include <boost/config.hpp>
williamr@2: 
williamr@2: namespace boost { namespace mpl { namespace aux {
williamr@2: 
williamr@2: template< typename T > struct integral_rank;
williamr@2: 
williamr@2: template<> struct integral_rank<bool>           : int_<1> {};
williamr@2: template<> struct integral_rank<signed char>    : int_<2> {};
williamr@2: template<> struct integral_rank<char>           : int_<3> {};
williamr@2: template<> struct integral_rank<unsigned char>  : int_<4> {};
williamr@2: #if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
williamr@2: template<> struct integral_rank<wchar_t>        : int_<5> {};
williamr@2: #endif
williamr@2: template<> struct integral_rank<short>          : int_<6> {};
williamr@2: template<> struct integral_rank<unsigned short> : int_<7> {};
williamr@2: template<> struct integral_rank<int>            : int_<8> {};
williamr@2: template<> struct integral_rank<unsigned int>   : int_<9> {};
williamr@2: template<> struct integral_rank<long>           : int_<10> {};
williamr@2: template<> struct integral_rank<unsigned long>  : int_<11> {};
williamr@2: 
williamr@2: #if defined(BOOST_HAS_LONG_LONG)
williamr@2: template<> struct integral_rank<long_long_type> : int_<12> {};
williamr@2: template<> struct integral_rank<ulong_long_type>: int_<13> {};
williamr@2: #endif
williamr@2: 
williamr@2: template< typename T1, typename T2 > struct largest_int
williamr@2: #if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)
williamr@2:     : if_c< 
williamr@2:           ( integral_rank<T1>::value >= integral_rank<T2>::value )
williamr@2:         , T1
williamr@2:         , T2
williamr@2:         >
williamr@2: {
williamr@2: #else
williamr@2: {
williamr@2:     enum { rank1 = integral_rank<T1>::value };
williamr@2:     enum { rank2 = integral_rank<T2>::value };
williamr@2:     typedef typename if_c< (rank1 >= rank2),T1,T2 >::type type;
williamr@2: #endif
williamr@2: };
williamr@2: 
williamr@2: }}}
williamr@2: 
williamr@2: #endif // BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED