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>
25 #if !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238)
28 struct is_signed_helper
30 typedef typename remove_cv<T>::type no_cv_t;
31 BOOST_STATIC_CONSTANT(bool, value = (static_cast<no_cv_t>(-1) < 0));
34 template <bool integral_type>
35 struct is_signed_select_helper
40 typedef is_signed_helper<T> type;
45 struct is_signed_select_helper<false>
50 typedef false_type type;
57 typedef is_signed_select_helper<
58 ::boost::type_traits::ice_or<
59 ::boost::is_integral<T>::value,
60 ::boost::is_enum<T>::value>::value
62 typedef typename selector::template rebind<T> binder;
63 typedef typename binder::type type;
64 #if defined(BOOST_MSVC) && (BOOST_MSVC < 1300)
65 BOOST_STATIC_CONSTANT(bool, value = is_signed_imp<T>::type::value);
67 BOOST_STATIC_CONSTANT(bool, value = type::value);
73 template <class T> struct is_signed_imp : public false_type{};
74 template <> struct is_signed_imp<signed char> : public true_type{};
75 template <> struct is_signed_imp<const signed char> : public true_type{};
76 template <> struct is_signed_imp<volatile signed char> : public true_type{};
77 template <> struct is_signed_imp<const volatile signed char> : public true_type{};
78 template <> struct is_signed_imp<short> : public true_type{};
79 template <> struct is_signed_imp<const short> : public true_type{};
80 template <> struct is_signed_imp<volatile short> : public true_type{};
81 template <> struct is_signed_imp<const volatile short> : public true_type{};
82 template <> struct is_signed_imp<int> : public true_type{};
83 template <> struct is_signed_imp<const int> : public true_type{};
84 template <> struct is_signed_imp<volatile int> : public true_type{};
85 template <> struct is_signed_imp<const volatile int> : public true_type{};
86 template <> struct is_signed_imp<long> : public true_type{};
87 template <> struct is_signed_imp<const long> : public true_type{};
88 template <> struct is_signed_imp<volatile long> : public true_type{};
89 template <> struct is_signed_imp<const volatile long> : public true_type{};
90 #ifdef BOOST_HAS_LONG_LONG
91 template <> struct is_signed_imp<long long> : public true_type{};
92 template <> struct is_signed_imp<const long long> : public true_type{};
93 template <> struct is_signed_imp<volatile long long> : public true_type{};
94 template <> struct is_signed_imp<const volatile long long> : public true_type{};
96 #if defined(CHAR_MIN) && (CHAR_MIN != 0)
97 template <> struct is_signed_imp<char> : public true_type{};
98 template <> struct is_signed_imp<const char> : public true_type{};
99 template <> struct is_signed_imp<volatile char> : public true_type{};
100 template <> struct is_signed_imp<const volatile char> : public true_type{};
102 #if defined(WCHAR_MIN) && (WCHAR_MIN != 0)
103 template <> struct is_signed_imp<wchar_t> : public true_type{};
104 template <> struct is_signed_imp<const wchar_t> : public true_type{};
105 template <> struct is_signed_imp<volatile wchar_t> : public true_type{};
106 template <> struct is_signed_imp<const volatile wchar_t> : public true_type{};
113 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,::boost::detail::is_signed_imp<T>::value)
117 #include <boost/type_traits/detail/bool_trait_undef.hpp>
119 #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED