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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 |