

#ifndef BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED

#define BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED



// Copyright Aleksey Gurtovoy 2000-2004

//

// Distributed under the Boost Software License, Version 1.0. 

// (See accompanying file LICENSE_1_0.txt or copy at 

// http://www.boost.org/LICENSE_1_0.txt)

//

// See http://www.boost.org/libs/mpl for documentation.



// $Source$

// $Date: 2004-09-18 23:08:53 -0400 (Sat, 18 Sep 2004) $

// $Revision: 25205 $



#include <boost/mpl/if.hpp>

#include <boost/mpl/int.hpp>

#include <boost/mpl/aux_/config/integral.hpp>

#include <boost/config.hpp>



namespace boost { namespace mpl { namespace aux {



template< typename T > struct integral_rank;



template<> struct integral_rank<bool>           : int_<1> {};

template<> struct integral_rank<signed char>    : int_<2> {};

template<> struct integral_rank<char>           : int_<3> {};

template<> struct integral_rank<unsigned char>  : int_<4> {};

#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)

template<> struct integral_rank<wchar_t>        : int_<5> {};

#endif

template<> struct integral_rank<short>          : int_<6> {};

template<> struct integral_rank<unsigned short> : int_<7> {};

template<> struct integral_rank<int>            : int_<8> {};

template<> struct integral_rank<unsigned int>   : int_<9> {};

template<> struct integral_rank<long>           : int_<10> {};

template<> struct integral_rank<unsigned long>  : int_<11> {};



#if defined(BOOST_HAS_LONG_LONG)

template<> struct integral_rank<long_long_type> : int_<12> {};

template<> struct integral_rank<ulong_long_type>: int_<13> {};

#endif



template< typename T1, typename T2 > struct largest_int

#if !defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC)

    : if_c< 

          ( integral_rank<T1>::value >= integral_rank<T2>::value )

        , T1

        , T2

        >

{

#else

{

    enum { rank1 = integral_rank<T1>::value };

    enum { rank2 = integral_rank<T2>::value };

    typedef typename if_c< (rank1 >= rank2),T1,T2 >::type type;

#endif

};



}}}



#endif // BOOST_MPL_AUX_LARGEST_INT_HPP_INCLUDED

