| |
| // (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 <climits> |
| |
| namespace boost { |
| |
| #if !defined( __CODEGEARC__ ) |
| |
| #if !(defined(BOOST_MSVC) && BOOST_MSVC <= 1310) && \ |
| !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238) &&\ |
| !defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION) |
| |
| namespace detail{ |
| |
| 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_impl |
| { |
| typedef ::boost::detail::is_signed_select_helper< ::boost::is_integral<T>::value || ::boost::is_enum<T>::value> selector; |
| typedef typename selector::template rebind<T> binder; |
| typedef typename binder::type type; |
| BOOST_STATIC_CONSTANT(bool, value = type::value); |
| }; |
| |
| } |
| |
| template <class T> struct is_signed : public integral_constant<bool, boost::detail::is_signed_impl<T>::value> {}; |
| |
| #else |
| |
| template <class T> struct is_signed : public false_type{}; |
| |
| #endif |
| |
| #else //defined( __CODEGEARC__ ) |
| template <class T> struct is_signed : public integral_constant<bool, __is_signed(T)>{}; |
| #endif |
| |
| template <> struct is_signed<signed char> : public true_type{}; |
| template <> struct is_signed<const signed char> : public true_type{}; |
| template <> struct is_signed<volatile signed char> : public true_type{}; |
| template <> struct is_signed<const volatile signed char> : public true_type{}; |
| template <> struct is_signed<short> : public true_type{}; |
| template <> struct is_signed<const short> : public true_type{}; |
| template <> struct is_signed<volatile short> : public true_type{}; |
| template <> struct is_signed<const volatile short> : public true_type{}; |
| template <> struct is_signed<int> : public true_type{}; |
| template <> struct is_signed<const int> : public true_type{}; |
| template <> struct is_signed<volatile int> : public true_type{}; |
| template <> struct is_signed<const volatile int> : public true_type{}; |
| template <> struct is_signed<long> : public true_type{}; |
| template <> struct is_signed<const long> : public true_type{}; |
| template <> struct is_signed<volatile long> : public true_type{}; |
| template <> struct is_signed<const volatile long> : public true_type{}; |
| |
| template <> struct is_signed<unsigned char> : public false_type{}; |
| template <> struct is_signed<const unsigned char> : public false_type{}; |
| template <> struct is_signed<volatile unsigned char> : public false_type{}; |
| template <> struct is_signed<const volatile unsigned char> : public false_type{}; |
| template <> struct is_signed<unsigned short> : public false_type{}; |
| template <> struct is_signed<const unsigned short> : public false_type{}; |
| template <> struct is_signed<volatile unsigned short> : public false_type{}; |
| template <> struct is_signed<const volatile unsigned short> : public false_type{}; |
| template <> struct is_signed<unsigned int> : public false_type{}; |
| template <> struct is_signed<const unsigned int> : public false_type{}; |
| template <> struct is_signed<volatile unsigned int> : public false_type{}; |
| template <> struct is_signed<const volatile unsigned int> : public false_type{}; |
| template <> struct is_signed<unsigned long> : public false_type{}; |
| template <> struct is_signed<const unsigned long> : public false_type{}; |
| template <> struct is_signed<volatile unsigned long> : public false_type{}; |
| template <> struct is_signed<const volatile unsigned long> : public false_type{}; |
| #ifdef BOOST_HAS_LONG_LONG |
| template <> struct is_signed< ::boost::long_long_type> : public true_type{}; |
| template <> struct is_signed<const ::boost::long_long_type> : public true_type{}; |
| template <> struct is_signed<volatile ::boost::long_long_type> : public true_type{}; |
| template <> struct is_signed<const volatile ::boost::long_long_type> : public true_type{}; |
| |
| template <> struct is_signed< ::boost::ulong_long_type> : public false_type{}; |
| template <> struct is_signed<const ::boost::ulong_long_type> : public false_type{}; |
| template <> struct is_signed<volatile ::boost::ulong_long_type> : public false_type{}; |
| template <> struct is_signed<const volatile ::boost::ulong_long_type> : public false_type{}; |
| #endif |
| #if defined(CHAR_MIN) |
| #if CHAR_MIN != 0 |
| template <> struct is_signed<char> : public true_type{}; |
| template <> struct is_signed<const char> : public true_type{}; |
| template <> struct is_signed<volatile char> : public true_type{}; |
| template <> struct is_signed<const volatile char> : public true_type{}; |
| #else |
| template <> struct is_signed<char> : public false_type{}; |
| template <> struct is_signed<const char> : public false_type{}; |
| template <> struct is_signed<volatile char> : public false_type{}; |
| template <> struct is_signed<const volatile char> : public false_type{}; |
| #endif |
| #endif |
| #if defined(WCHAR_MIN) && !defined(BOOST_NO_INTRINSIC_WCHAR_T) |
| #if WCHAR_MIN != 0 |
| template <> struct is_signed<wchar_t> : public true_type{}; |
| template <> struct is_signed<const wchar_t> : public true_type{}; |
| template <> struct is_signed<volatile wchar_t> : public true_type{}; |
| template <> struct is_signed<const volatile wchar_t> : public true_type{}; |
| #else |
| template <> struct is_signed<wchar_t> : public false_type{}; |
| template <> struct is_signed<const wchar_t> : public false_type{}; |
| template <> struct is_signed<volatile wchar_t> : public false_type{}; |
| template <> struct is_signed<const volatile wchar_t> : public false_type{}; |
| #endif |
| #endif |
| } // namespace boost |
| |
| #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED |