1 |
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2 | // (C) Copyright John Maddock 2005.
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3 | // Use, modification and distribution are subject to the Boost Software License,
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4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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5 | // http://www.boost.org/LICENSE_1_0.txt).
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6 | //
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7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation.
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8 |
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9 |
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10 | #ifndef BOOST_TT_IS_UNSIGNED_HPP_INCLUDED
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11 | #define BOOST_TT_IS_UNSIGNED_HPP_INCLUDED
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12 |
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13 | #include "boost/type_traits/is_integral.hpp"
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14 | #include "boost/type_traits/is_enum.hpp"
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15 | #include "boost/type_traits/detail/ice_or.hpp"
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16 |
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17 | // should be the last #include
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18 | #include "boost/type_traits/detail/bool_trait_def.hpp"
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19 |
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20 | namespace boost {
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21 |
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22 | namespace detail{
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23 |
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24 | #if !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238)
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25 |
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26 | template <class T>
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27 | struct is_ununsigned_helper
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28 | {
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29 | BOOST_STATIC_CONSTANT(bool, value = (static_cast<T>(-1) > 0));
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30 | };
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31 |
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32 | template <bool integral_type>
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33 | struct is_ununsigned_select_helper
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34 | {
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35 | template <class T>
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36 | struct rebind
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37 | {
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38 | typedef is_ununsigned_helper<T> type;
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39 | };
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40 | };
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41 |
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42 | template <>
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43 | struct is_ununsigned_select_helper<false>
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44 | {
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45 | template <class T>
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46 | struct rebind
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47 | {
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48 | typedef false_type type;
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49 | };
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50 | };
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51 |
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52 | template <class T>
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53 | struct is_unsigned_imp
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54 | {
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55 | typedef is_ununsigned_select_helper<
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56 | ::boost::type_traits::ice_or<
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57 | ::boost::is_integral<T>::value,
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58 | ::boost::is_enum<T>::value>::value
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59 | > selector;
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60 | typedef typename selector::template rebind<T> binder;
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61 | typedef typename binder::type type;
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62 | BOOST_STATIC_CONSTANT(bool, value = type::value);
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63 | };
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64 |
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65 | #else
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66 |
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67 | template <class T> struct is_unsigned_imp : public false_type{};
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68 | template <> struct is_unsigned_imp<unsigned char> : public true_type{};
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69 | template <> struct is_unsigned_imp<const unsigned char> : public true_type{};
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70 | template <> struct is_unsigned_imp<volatile unsigned char> : public true_type{};
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71 | template <> struct is_unsigned_imp<const volatile unsigned char> : public true_type{};
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72 | template <> struct is_unsigned_imp<unsigned short> : public true_type{};
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73 | template <> struct is_unsigned_imp<const unsigned short> : public true_type{};
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74 | template <> struct is_unsigned_imp<volatile unsigned short> : public true_type{};
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75 | template <> struct is_unsigned_imp<const volatile unsigned short> : public true_type{};
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76 | template <> struct is_unsigned_imp<unsigned int> : public true_type{};
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77 | template <> struct is_unsigned_imp<const unsigned int> : public true_type{};
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78 | template <> struct is_unsigned_imp<volatile unsigned int> : public true_type{};
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79 | template <> struct is_unsigned_imp<const volatile unsigned int> : public true_type{};
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80 | template <> struct is_unsigned_imp<unsigned long> : public true_type{};
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81 | template <> struct is_unsigned_imp<const unsigned long> : public true_type{};
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82 | template <> struct is_unsigned_imp<volatile unsigned long> : public true_type{};
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83 | template <> struct is_unsigned_imp<const volatile unsigned long> : public true_type{};
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84 | #ifdef BOOST_HAS_LONG_LONG
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85 | template <> struct is_unsigned_imp<unsigned long long> : public true_type{};
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86 | template <> struct is_unsigned_imp<const unsigned long long> : public true_type{};
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87 | template <> struct is_unsigned_imp<volatile unsigned long long> : public true_type{};
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88 | template <> struct is_unsigned_imp<const volatile unsigned long long> : public true_type{};
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89 | #endif
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90 | #if defined(CHAR_MIN) && (CHAR_MIN == 0)
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91 | template <> struct is_unsigned_imp<char> : public true_type{};
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92 | template <> struct is_unsigned_imp<const char> : public true_type{};
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93 | template <> struct is_unsigned_imp<volatile char> : public true_type{};
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94 | template <> struct is_unsigned_imp<const volatile char> : public true_type{};
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95 | #endif
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96 | #if defined(WCHAR_MIN) && (WCHAR_MIN == 0)
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97 | template <> struct is_unsigned_imp<wchar_t> : public true_type{};
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98 | template <> struct is_unsigned_imp<const wchar_t> : public true_type{};
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99 | template <> struct is_unsigned_imp<volatile wchar_t> : public true_type{};
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100 | template <> struct is_unsigned_imp<const volatile wchar_t> : public true_type{};
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101 | #endif
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102 |
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103 | #endif
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104 |
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105 |
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106 | }
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107 |
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108 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_unsigned,T,::boost::detail::is_unsigned_imp<T>::value)
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109 |
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110 | } // namespace boost
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111 |
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112 | #include "boost/type_traits/detail/bool_trait_undef.hpp"
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113 |
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114 | #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED
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