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- // (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
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