2 // (C) Copyright John Maddock 2005.
3 // Use, modification and distribution are subject to the Boost Software License,
4 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt).
7 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
10 #ifndef BOOST_TT_IS_SIGNED_HPP_INCLUDED
11 #define BOOST_TT_IS_SIGNED_HPP_INCLUDED
13 #include <boost/type_traits/is_integral.hpp>
14 #include <boost/type_traits/remove_cv.hpp>
15 #include <boost/type_traits/is_enum.hpp>
16 #include <boost/type_traits/detail/ice_or.hpp>
18 // should be the last #include
19 #include <boost/type_traits/detail/bool_trait_def.hpp>
23 #if !defined( __CODEGEARC__ )
27 #if !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238)
30 struct is_signed_helper
32 typedef typename remove_cv<T>::type no_cv_t;
33 BOOST_STATIC_CONSTANT(bool, value = (!(static_cast<no_cv_t>(-1) > 0)));
36 template <bool integral_type>
37 struct is_signed_select_helper
42 typedef is_signed_helper<T> type;
47 struct is_signed_select_helper<false>
52 typedef false_type type;
59 typedef is_signed_select_helper<
60 ::boost::type_traits::ice_or<
61 ::boost::is_integral<T>::value,
62 ::boost::is_enum<T>::value>::value
64 typedef typename selector::template rebind<T> binder;
65 typedef typename binder::type type;
66 #if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
67 BOOST_STATIC_CONSTANT(bool, value = is_signed_imp<T>::type::value);
69 BOOST_STATIC_CONSTANT(bool, value = type::value);
75 template <class T> struct is_signed_imp : public false_type{};
76 template <> struct is_signed_imp<signed char> : public true_type{};
77 template <> struct is_signed_imp<const signed char> : public true_type{};
78 template <> struct is_signed_imp<volatile signed char> : public true_type{};
79 template <> struct is_signed_imp<const volatile signed char> : public true_type{};
80 template <> struct is_signed_imp<short> : public true_type{};
81 template <> struct is_signed_imp<const short> : public true_type{};
82 template <> struct is_signed_imp<volatile short> : public true_type{};
83 template <> struct is_signed_imp<const volatile short> : public true_type{};
84 template <> struct is_signed_imp<int> : public true_type{};
85 template <> struct is_signed_imp<const int> : public true_type{};
86 template <> struct is_signed_imp<volatile int> : public true_type{};
87 template <> struct is_signed_imp<const volatile int> : public true_type{};
88 template <> struct is_signed_imp<long> : public true_type{};
89 template <> struct is_signed_imp<const long> : public true_type{};
90 template <> struct is_signed_imp<volatile long> : public true_type{};
91 template <> struct is_signed_imp<const volatile long> : public true_type{};
92 #ifdef BOOST_HAS_LONG_LONG
93 template <> struct is_signed_imp<long long> : public true_type{};
94 template <> struct is_signed_imp<const long long> : public true_type{};
95 template <> struct is_signed_imp<volatile long long> : public true_type{};
96 template <> struct is_signed_imp<const volatile long long> : public true_type{};
98 #if defined(CHAR_MIN) && (CHAR_MIN != 0)
99 template <> struct is_signed_imp<char> : public true_type{};
100 template <> struct is_signed_imp<const char> : public true_type{};
101 template <> struct is_signed_imp<volatile char> : public true_type{};
102 template <> struct is_signed_imp<const volatile char> : public true_type{};
104 #if defined(WCHAR_MIN) && (WCHAR_MIN != 0)
105 template <> struct is_signed_imp<wchar_t> : public true_type{};
106 template <> struct is_signed_imp<const wchar_t> : public true_type{};
107 template <> struct is_signed_imp<volatile wchar_t> : public true_type{};
108 template <> struct is_signed_imp<const volatile wchar_t> : public true_type{};
115 #endif // !defined( __CODEGEARC__ )
117 #if defined( __CODEGEARC__ )
118 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,__is_signed(T))
120 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,::boost::detail::is_signed_imp<T>::value)
125 #include <boost/type_traits/detail/bool_trait_undef.hpp>
127 #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED