// (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; | |
#if defined(BOOST_MSVC) && (BOOST_MSVC < 1300) | |
BOOST_STATIC_CONSTANT(bool, value = is_signed_imp<T>::type::value); | |
#else | |
BOOST_STATIC_CONSTANT(bool, value = type::value); | |
#endif | |
}; | |
#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 |