[857] | 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
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