3rdparty/boost/boost/type_traits/make_unsigned.hpp

   1
   2 //  (C) Copyright John Maddock 2007.
   3 //  Use, modification and distribution are subject to the Boost Software License,
   4 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   5 //  http://www.boost.org/LICENSE_1_0.txt).
   6 //
   7 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   8
   9 #ifndef BOOST_TT_MAKE_UNSIGNED_HPP_INCLUDED
  10 #define BOOST_TT_MAKE_UNSIGNED_HPP_INCLUDED
  11
  12 #include <boost/mpl/if.hpp>
  13 #include <boost/type_traits/is_integral.hpp>
  14 #include <boost/type_traits/is_signed.hpp>
  15 #include <boost/type_traits/is_unsigned.hpp>
  16 #include <boost/type_traits/is_enum.hpp>
  17 #include <boost/type_traits/is_same.hpp>
  18 #include <boost/type_traits/remove_cv.hpp>
  19 #include <boost/type_traits/is_const.hpp>
  20 #include <boost/type_traits/is_volatile.hpp>
  21 #include <boost/type_traits/add_const.hpp>
  22 #include <boost/type_traits/add_volatile.hpp>
  23 #include <boost/type_traits/detail/ice_or.hpp>
  24 #include <boost/type_traits/detail/ice_and.hpp>
  25 #include <boost/type_traits/detail/ice_not.hpp>
  26 #include <boost/static_assert.hpp>
  27
  28 // should be the last #include
  29 #include <boost/type_traits/detail/type_trait_def.hpp>
  30
  31 namespace boost {
  32
  33 namespace detail {
  34
  35 template <class T>
  36 struct make_unsigned_imp
  37 {
  38    BOOST_STATIC_ASSERT(
  39       (::boost::type_traits::ice_or< ::boost::is_integral<T>::value, ::boost::is_enum<T>::value>::value));
  40    BOOST_STATIC_ASSERT(
  41       (::boost::type_traits::ice_not< ::boost::is_same<
  42          typename remove_cv<T>::type, bool>::value>::value));
  43
  44    typedef typename remove_cv<T>::type t_no_cv;
  45    typedef typename mpl::if_c<
  46       (::boost::type_traits::ice_and<
  47          ::boost::is_unsigned<T>::value,
  48          ::boost::is_integral<T>::value,
  49          ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, char>::value>::value,
  50          ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, wchar_t>::value>::value,
  51          ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, bool>::value>::value >::value),
  52       T,
  53       typename mpl::if_c<
  54          (::boost::type_traits::ice_and<
  55             ::boost::is_integral<T>::value,
  56             ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, char>::value>::value,
  57             ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, wchar_t>::value>::value,
  58             ::boost::type_traits::ice_not< ::boost::is_same<t_no_cv, bool>::value>::value>
  59          ::value),
  60          typename mpl::if_<
  61             is_same<t_no_cv, signed char>,
  62             unsigned char,
  63             typename mpl::if_<
  64                is_same<t_no_cv, short>,
  65                unsigned short,
  66                typename mpl::if_<
  67                   is_same<t_no_cv, int>,
  68                   unsigned int,
  69                   typename mpl::if_<
  70                      is_same<t_no_cv, long>,
  71                      unsigned long,
  72 #if defined(BOOST_HAS_LONG_LONG)
  73 #ifdef BOOST_HAS_INT128
  74                      typename mpl::if_c<
  75                         sizeof(t_no_cv) == sizeof(boost::ulong_long_type),
  76                         boost::ulong_long_type,
  77                         boost::uint128_type
  78                      >::type
  79 #else
  80                      boost::ulong_long_type
  81 #endif
  82 #elif defined(BOOST_HAS_MS_INT64)
  83                      unsigned __int64
  84 #else
  85                      unsigned long
  86 #endif
  87                   >::type
  88                >::type
  89             >::type
  90          >::type,
  91          // Not a regular integer type:
  92          typename mpl::if_c<
  93             sizeof(t_no_cv) == sizeof(unsigned char),
  94             unsigned char,
  95             typename mpl::if_c<
  96                sizeof(t_no_cv) == sizeof(unsigned short),
  97                unsigned short,
  98                typename mpl::if_c<
  99                   sizeof(t_no_cv) == sizeof(unsigned int),
 100                   unsigned int,
 101                   typename mpl::if_c<
 102                      sizeof(t_no_cv) == sizeof(unsigned long),
 103                      unsigned long,
 104 #if defined(BOOST_HAS_LONG_LONG)
 105 #ifdef BOOST_HAS_INT128
 106                      typename mpl::if_c<
 107                         sizeof(t_no_cv) == sizeof(boost::ulong_long_type),
 108                         boost::ulong_long_type,
 109                         boost::uint128_type
 110                      >::type
 111 #else
 112                      boost::ulong_long_type
 113 #endif
 114 #elif defined(BOOST_HAS_MS_INT64)
 115                      unsigned __int64
 116 #else
 117                      unsigned long
 118 #endif
 119                   >::type
 120                >::type
 121             >::type
 122          >::type
 123       >::type
 124    >::type base_integer_type;
 125
 126    // Add back any const qualifier:
 127    typedef typename mpl::if_<
 128       is_const<T>,
 129       typename add_const<base_integer_type>::type,
 130       base_integer_type
 131    >::type const_base_integer_type;
 132
 133    // Add back any volatile qualifier:
 134    typedef typename mpl::if_<
 135       is_volatile<T>,
 136       typename add_volatile<const_base_integer_type>::type,
 137       const_base_integer_type
 138    >::type type;
 139 };
 140
 141
 142 } // namespace detail
 143
 144 BOOST_TT_AUX_TYPE_TRAIT_DEF1(make_unsigned,T,typename boost::detail::make_unsigned_imp<T>::type)
 145
 146 } // namespace boost
 147
 148 #include <boost/type_traits/detail/type_trait_undef.hpp>
 149
 150 #endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
 151