| |
| // (C) Copyright John Maddock 2005. |
| // Use, modification and distribution are subject to 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/type_traits for most recent version including documentation. |
| |
| |
| #ifndef BOOST_TT_IS_SIGNED_HPP_INCLUDED |
| #define BOOST_TT_IS_SIGNED_HPP_INCLUDED |
| |
| #include <boost/type_traits/is_integral.hpp> |
| #include <boost/type_traits/remove_cv.hpp> |
| #include <boost/type_traits/is_enum.hpp> |
| #include <boost/type_traits/detail/ice_or.hpp> |
| |
| // should be the last #include |
| #include <boost/type_traits/detail/bool_trait_def.hpp> |
| |
| namespace boost { |
| |
| #if !defined( __CODEGEARC__ ) |
| |
| namespace detail{ |
| |
| #if !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238) && !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION) |
| |
| template <class T> |
| struct is_signed_values |
| { |
| // |
| // Note that we cannot use BOOST_STATIC_CONSTANT here, using enum's |
| // rather than "real" static constants simply doesn't work or give |
| // the correct answer. |
| // |
| typedef typename remove_cv<T>::type no_cv_t; |
| static const no_cv_t minus_one = (static_cast<no_cv_t>(-1)); |
| static const no_cv_t zero = (static_cast<no_cv_t>(0)); |
| }; |
| |
| template <class T> |
| struct is_signed_helper |
| { |
| typedef typename remove_cv<T>::type no_cv_t; |
| BOOST_STATIC_CONSTANT(bool, value = (!(::boost::detail::is_signed_values<T>::minus_one > boost::detail::is_signed_values<T>::zero))); |
| }; |
| |
| template <bool integral_type> |
| struct is_signed_select_helper |
| { |
| template <class T> |
| struct rebind |
| { |
| typedef is_signed_helper<T> type; |
| }; |
| }; |
| |
| template <> |
| struct is_signed_select_helper<false> |
| { |
| template <class T> |
| struct rebind |
| { |
| typedef false_type type; |
| }; |
| }; |
| |
| template <class T> |
| struct is_signed_imp |
| { |
| typedef is_signed_select_helper< |
| ::boost::type_traits::ice_or< |
| ::boost::is_integral<T>::value, |
| ::boost::is_enum<T>::value>::value |
| > selector; |
| typedef typename selector::template rebind<T> binder; |
| typedef typename binder::type type; |
| BOOST_STATIC_CONSTANT(bool, value = type::value); |
| }; |
| |
| #else |
| |
| template <class T> struct is_signed_imp : public false_type{}; |
| template <> struct is_signed_imp<signed char> : public true_type{}; |
| template <> struct is_signed_imp<const signed char> : public true_type{}; |
| template <> struct is_signed_imp<volatile signed char> : public true_type{}; |
| template <> struct is_signed_imp<const volatile signed char> : public true_type{}; |
| template <> struct is_signed_imp<short> : public true_type{}; |
| template <> struct is_signed_imp<const short> : public true_type{}; |
| template <> struct is_signed_imp<volatile short> : public true_type{}; |
| template <> struct is_signed_imp<const volatile short> : public true_type{}; |
| template <> struct is_signed_imp<int> : public true_type{}; |
| template <> struct is_signed_imp<const int> : public true_type{}; |
| template <> struct is_signed_imp<volatile int> : public true_type{}; |
| template <> struct is_signed_imp<const volatile int> : public true_type{}; |
| template <> struct is_signed_imp<long> : public true_type{}; |
| template <> struct is_signed_imp<const long> : public true_type{}; |
| template <> struct is_signed_imp<volatile long> : public true_type{}; |
| template <> struct is_signed_imp<const volatile long> : public true_type{}; |
| #ifdef BOOST_HAS_LONG_LONG |
| template <> struct is_signed_imp<long long> : public true_type{}; |
| template <> struct is_signed_imp<const long long> : public true_type{}; |
| template <> struct is_signed_imp<volatile long long> : public true_type{}; |
| template <> struct is_signed_imp<const volatile long long> : public true_type{}; |
| #endif |
| #if defined(CHAR_MIN) && (CHAR_MIN != 0) |
| template <> struct is_signed_imp<char> : public true_type{}; |
| template <> struct is_signed_imp<const char> : public true_type{}; |
| template <> struct is_signed_imp<volatile char> : public true_type{}; |
| template <> struct is_signed_imp<const volatile char> : public true_type{}; |
| #endif |
| #if defined(WCHAR_MIN) && (WCHAR_MIN != 0) |
| template <> struct is_signed_imp<wchar_t> : public true_type{}; |
| template <> struct is_signed_imp<const wchar_t> : public true_type{}; |
| template <> struct is_signed_imp<volatile wchar_t> : public true_type{}; |
| template <> struct is_signed_imp<const volatile wchar_t> : public true_type{}; |
| #endif |
| |
| #endif |
| |
| } |
| |
| #endif // !defined( __CODEGEARC__ ) |
| |
| #if defined( __CODEGEARC__ ) |
| BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,__is_signed(T)) |
| #else |
| BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,::boost::detail::is_signed_imp<T>::value) |
| #endif |
| |
| } // namespace boost |
| |
| #include <boost/type_traits/detail/bool_trait_undef.hpp> |
| |
| #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED |