164 lines
6.7 KiB
Plaintext
164 lines
6.7 KiB
Plaintext
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// (C) Copyright John Maddock 2005.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_IS_SIGNED_HPP_INCLUDED
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#define BOOST_TT_IS_SIGNED_HPP_INCLUDED
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#include <boost/type_traits/is_integral.hpp>
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#include <boost/type_traits/remove_cv.hpp>
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#include <boost/type_traits/is_enum.hpp>
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#include <climits>
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namespace boost {
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#if !defined( __CODEGEARC__ )
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#if !(defined(BOOST_MSVC) && BOOST_MSVC <= 1310) && \
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!(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238) &&\
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!defined(BOOST_NO_INCLASS_MEMBER_INITIALIZATION)
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namespace detail{
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template <class T>
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struct is_signed_values
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{
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//
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// Note that we cannot use BOOST_STATIC_CONSTANT here, using enum's
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// rather than "real" static constants simply doesn't work or give
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// the correct answer.
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//
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typedef typename remove_cv<T>::type no_cv_t;
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static const no_cv_t minus_one = (static_cast<no_cv_t>(-1));
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static const no_cv_t zero = (static_cast<no_cv_t>(0));
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};
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template <class T>
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struct is_signed_helper
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{
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typedef typename remove_cv<T>::type no_cv_t;
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BOOST_STATIC_CONSTANT(bool, value = (!(::boost::detail::is_signed_values<T>::minus_one > boost::detail::is_signed_values<T>::zero)));
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};
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template <bool integral_type>
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struct is_signed_select_helper
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{
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template <class T>
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struct rebind
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{
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typedef is_signed_helper<T> type;
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};
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};
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template <>
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struct is_signed_select_helper<false>
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{
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template <class T>
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struct rebind
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{
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typedef false_type type;
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};
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};
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template <class T>
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struct is_signed_impl
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{
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typedef ::boost::detail::is_signed_select_helper< ::boost::is_integral<T>::value || ::boost::is_enum<T>::value> selector;
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typedef typename selector::template rebind<T> binder;
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typedef typename binder::type type;
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BOOST_STATIC_CONSTANT(bool, value = type::value);
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};
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}
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template <class T> struct is_signed : public integral_constant<bool, boost::detail::is_signed_impl<T>::value> {};
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#else
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template <class T> struct is_signed : public false_type{};
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#endif
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#else //defined( __CODEGEARC__ )
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template <class T> struct is_signed : public integral_constant<bool, __is_signed(T)>{};
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#endif
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template <> struct is_signed<signed char> : public true_type{};
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template <> struct is_signed<const signed char> : public true_type{};
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template <> struct is_signed<volatile signed char> : public true_type{};
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template <> struct is_signed<const volatile signed char> : public true_type{};
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template <> struct is_signed<short> : public true_type{};
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template <> struct is_signed<const short> : public true_type{};
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template <> struct is_signed<volatile short> : public true_type{};
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template <> struct is_signed<const volatile short> : public true_type{};
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template <> struct is_signed<int> : public true_type{};
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template <> struct is_signed<const int> : public true_type{};
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template <> struct is_signed<volatile int> : public true_type{};
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template <> struct is_signed<const volatile int> : public true_type{};
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template <> struct is_signed<long> : public true_type{};
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template <> struct is_signed<const long> : public true_type{};
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template <> struct is_signed<volatile long> : public true_type{};
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template <> struct is_signed<const volatile long> : public true_type{};
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template <> struct is_signed<unsigned char> : public false_type{};
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template <> struct is_signed<const unsigned char> : public false_type{};
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template <> struct is_signed<volatile unsigned char> : public false_type{};
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template <> struct is_signed<const volatile unsigned char> : public false_type{};
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template <> struct is_signed<unsigned short> : public false_type{};
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template <> struct is_signed<const unsigned short> : public false_type{};
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template <> struct is_signed<volatile unsigned short> : public false_type{};
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template <> struct is_signed<const volatile unsigned short> : public false_type{};
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template <> struct is_signed<unsigned int> : public false_type{};
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template <> struct is_signed<const unsigned int> : public false_type{};
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template <> struct is_signed<volatile unsigned int> : public false_type{};
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template <> struct is_signed<const volatile unsigned int> : public false_type{};
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template <> struct is_signed<unsigned long> : public false_type{};
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template <> struct is_signed<const unsigned long> : public false_type{};
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template <> struct is_signed<volatile unsigned long> : public false_type{};
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template <> struct is_signed<const volatile unsigned long> : public false_type{};
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#ifdef BOOST_HAS_LONG_LONG
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template <> struct is_signed< ::boost::long_long_type> : public true_type{};
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template <> struct is_signed<const ::boost::long_long_type> : public true_type{};
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template <> struct is_signed<volatile ::boost::long_long_type> : public true_type{};
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template <> struct is_signed<const volatile ::boost::long_long_type> : public true_type{};
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template <> struct is_signed< ::boost::ulong_long_type> : public false_type{};
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template <> struct is_signed<const ::boost::ulong_long_type> : public false_type{};
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template <> struct is_signed<volatile ::boost::ulong_long_type> : public false_type{};
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template <> struct is_signed<const volatile ::boost::ulong_long_type> : public false_type{};
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#endif
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#if defined(CHAR_MIN)
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#if CHAR_MIN != 0
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template <> struct is_signed<char> : public true_type{};
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template <> struct is_signed<const char> : public true_type{};
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template <> struct is_signed<volatile char> : public true_type{};
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template <> struct is_signed<const volatile char> : public true_type{};
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#else
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template <> struct is_signed<char> : public false_type{};
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template <> struct is_signed<const char> : public false_type{};
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template <> struct is_signed<volatile char> : public false_type{};
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template <> struct is_signed<const volatile char> : public false_type{};
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#endif
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#endif
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#if defined(WCHAR_MIN) && !defined(BOOST_NO_INTRINSIC_WCHAR_T)
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#if WCHAR_MIN != 0
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template <> struct is_signed<wchar_t> : public true_type{};
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template <> struct is_signed<const wchar_t> : public true_type{};
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template <> struct is_signed<volatile wchar_t> : public true_type{};
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template <> struct is_signed<const volatile wchar_t> : public true_type{};
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#else
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template <> struct is_signed<wchar_t> : public false_type{};
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template <> struct is_signed<const wchar_t> : public false_type{};
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template <> struct is_signed<volatile wchar_t> : public false_type{};
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template <> struct is_signed<const volatile wchar_t> : public false_type{};
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#endif
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#endif
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} // namespace boost
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#endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED
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