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Diffstat (limited to '3rdParty/Boost/boost/type_traits/integral_promotion.hpp')
-rw-r--r-- | 3rdParty/Boost/boost/type_traits/integral_promotion.hpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/type_traits/integral_promotion.hpp b/3rdParty/Boost/boost/type_traits/integral_promotion.hpp new file mode 100644 index 0000000..a85e243 --- /dev/null +++ b/3rdParty/Boost/boost/type_traits/integral_promotion.hpp @@ -0,0 +1,195 @@ +// Copyright 2005 Alexander Nasonov. +// 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) + +#ifndef FILE_boost_type_traits_integral_promotion_hpp_INCLUDED +#define FILE_boost_type_traits_integral_promotion_hpp_INCLUDED + +#include <boost/config.hpp> + +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/type_traits/integral_constant.hpp> +#include <boost/type_traits/is_const.hpp> +#include <boost/type_traits/is_enum.hpp> +#include <boost/type_traits/is_volatile.hpp> +#include <boost/type_traits/remove_cv.hpp> + +// Should be the last #include +#include <boost/type_traits/detail/type_trait_def.hpp> + +namespace boost { + +namespace type_traits { namespace detail { + +// 4.5/2 +template <class T> struct need_promotion : boost::is_enum<T> {}; + +// 4.5/1 +template<> struct need_promotion<char > : true_type {}; +template<> struct need_promotion<signed char > : true_type {}; +template<> struct need_promotion<unsigned char > : true_type {}; +template<> struct need_promotion<signed short int > : true_type {}; +template<> struct need_promotion<unsigned short int> : true_type {}; + + +// Specializations for non-standard types. +// Type is promoted if it's smaller then int. + +#define BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(T) \ + template<> struct need_promotion<T> \ + : integral_constant<bool, (sizeof(T) < sizeof(int))> {}; + +// Same set of integral types as in boost/type_traits/is_integral.hpp. +// Please, keep in sync. +#if (defined(BOOST_MSVC) && (BOOST_MSVC < 1300)) \ + || (defined(BOOST_INTEL_CXX_VERSION) && defined(_MSC_VER) && (BOOST_INTEL_CXX_VERSION <= 600)) \ + || (defined(__BORLANDC__) && (__BORLANDC__ == 0x600) && (_MSC_VER < 1300)) +// TODO: common macro for this #if. Or better yet, PP SEQ of non-standard types. +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(__int8 ) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(unsigned __int8 ) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(__int16 ) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(unsigned __int16) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(__int32 ) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(unsigned __int32) +#ifdef __BORLANDC__ +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(unsigned __int64) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE( __int64) +#endif +#endif + +#if defined(BOOST_HAS_LONG_LONG) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(boost::ulong_long_type) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(boost::long_long_type ) +#elif defined(BOOST_HAS_MS_INT64) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE(unsigned __int64) +BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE( __int64) +#endif + +#undef BOOST_TT_AUX_PROMOTE_NONSTANDARD_TYPE + + +#ifndef BOOST_NO_INTRINSIC_WCHAR_T +// 4.5/2 +template<> struct need_promotion<wchar_t> : true_type {}; +#endif + +// 4.5/3 (integral bit-field) is not supported. + +// 4.5/4 +template<> struct need_promotion<bool> : true_type {}; + + +// Get promoted type by index and cv qualifiers. + +template<int Index, int IsConst, int IsVolatile> struct promote_from_index; + +#define BOOST_TT_AUX_PROMOTE_FROM_INDEX(N,T) \ + template<> struct promote_from_index<N,0,0> { typedef T type; }; \ + template<> struct promote_from_index<N,0,1> { typedef T volatile type; }; \ + template<> struct promote_from_index<N,1,0> { typedef T const type; }; \ + template<> struct promote_from_index<N,1,1> { typedef T const volatile type; }; + + +BOOST_TT_AUX_PROMOTE_FROM_INDEX(1, int ) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(2, unsigned int ) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(3, long ) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(4, unsigned long) + + +// WARNING: integral promotions to non-standard types +// long long and __int64 are not defined by the standard. +// Additional specialisations and overloads shouldn't +// introduce ambiguity, though. + +#if defined(BOOST_HAS_LONG_LONG) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(5, boost::long_long_type ) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(6, boost::ulong_long_type) +#elif defined(BOOST_HAS_MS_INT64) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(7, __int64 ) +BOOST_TT_AUX_PROMOTE_FROM_INDEX(8, unsigned __int64) +#endif + +#undef BOOST_TT_AUX_PROMOTE_FROM_INDEX + + +// Define BOOST_TT_AUX_PROMOTED_INDEX_TESTER: +#if !defined(BOOST_MSVC) + +template<int N> +struct sized_type_for_promotion +{ + typedef char (&type)[N]; +}; + +#define BOOST_TT_AUX_PROMOTED_INDEX_TESTER(I,T) \ + sized_type_for_promotion<I>::type promoted_index_tester(T); + +#else + +#define BOOST_TT_AUX_PROMOTED_INDEX_TESTER(I,T) \ + char (&promoted_index_tester(T))[I]; + +#endif + +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(1, int ) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(2, unsigned int ) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(3, long ) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(4, unsigned long) + +#if defined(BOOST_HAS_LONG_LONG) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(5, boost::long_long_type ) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(6, boost::ulong_long_type) +#elif defined(BOOST_HAS_MS_INT64) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(7, __int64 ) +BOOST_TT_AUX_PROMOTED_INDEX_TESTER(8, unsigned __int64) +#endif + +#undef BOOST_TT_AUX_PROMOTED_INDEX_TESTER + + +// Get an index of promoted type for type T. +// Precondition: need_promotion<T> +template<class T> +struct promoted_index +{ + static T testee; // undefined + BOOST_STATIC_CONSTANT(int, value = sizeof(promoted_index_tester(+testee)) ); + // Unary plus promotes testee LOOK HERE ---> ^ +}; + +template<class T> +struct integral_promotion_impl +{ + typedef BOOST_DEDUCED_TYPENAME promote_from_index< + (boost::type_traits::detail::promoted_index<T>::value) + , (boost::is_const<T>::value) + , (boost::is_volatile<T>::value) + >::type type; +}; + +template<class T> +struct integral_promotion + : boost::mpl::eval_if< + need_promotion<BOOST_DEDUCED_TYPENAME remove_cv<T>::type> + , integral_promotion_impl<T> + , boost::mpl::identity<T> + > +{ +}; + +} } + +BOOST_TT_AUX_TYPE_TRAIT_DEF1( + integral_promotion + , T + , BOOST_DEDUCED_TYPENAME + boost::type_traits::detail::integral_promotion<T>::type + ) +} + +#include <boost/type_traits/detail/type_trait_undef.hpp> + +#endif // #ifndef FILE_boost_type_traits_integral_promotion_hpp_INCLUDED + |