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_SIGNED_HPP_INCLUDED |
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11 | #define BOOST_TT_IS_SIGNED_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/remove_cv.hpp> |
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15 | #include <boost/type_traits/is_enum.hpp> |
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16 | #include <boost/type_traits/detail/ice_or.hpp> |
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17 | |
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18 | // should be the last #include |
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19 | #include <boost/type_traits/detail/bool_trait_def.hpp> |
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20 | |
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21 | namespace boost { |
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22 | |
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23 | #if !defined( __CODEGEARC__ ) |
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24 | |
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25 | namespace detail{ |
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26 | |
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27 | #if !(defined(__EDG_VERSION__) && __EDG_VERSION__ <= 238) |
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28 | |
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29 | template <class T> |
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30 | struct is_signed_values |
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31 | { |
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32 | typedef typename remove_cv<T>::type no_cv_t; |
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33 | BOOST_STATIC_CONSTANT(no_cv_t, minus_one = (static_cast<no_cv_t>(-1))); |
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34 | BOOST_STATIC_CONSTANT(no_cv_t, zero = (static_cast<no_cv_t>(0))); |
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35 | }; |
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36 | |
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37 | template <class T> |
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38 | struct is_signed_helper |
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39 | { |
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40 | typedef typename remove_cv<T>::type no_cv_t; |
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41 | BOOST_STATIC_CONSTANT(bool, value = (!(::boost::detail::is_signed_values<T>::minus_one > boost::detail::is_signed_values<T>::zero))); |
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42 | }; |
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43 | |
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44 | template <bool integral_type> |
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45 | struct is_signed_select_helper |
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46 | { |
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47 | template <class T> |
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48 | struct rebind |
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49 | { |
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50 | typedef is_signed_helper<T> type; |
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51 | }; |
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52 | }; |
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53 | |
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54 | template <> |
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55 | struct is_signed_select_helper<false> |
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56 | { |
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57 | template <class T> |
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58 | struct rebind |
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59 | { |
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60 | typedef false_type type; |
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61 | }; |
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62 | }; |
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63 | |
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64 | template <class T> |
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65 | struct is_signed_imp |
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66 | { |
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67 | typedef is_signed_select_helper< |
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68 | ::boost::type_traits::ice_or< |
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69 | ::boost::is_integral<T>::value, |
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70 | ::boost::is_enum<T>::value>::value |
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71 | > selector; |
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72 | typedef typename selector::template rebind<T> binder; |
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73 | typedef typename binder::type type; |
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74 | #if defined(BOOST_MSVC) && (BOOST_MSVC < 1300) |
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75 | BOOST_STATIC_CONSTANT(bool, value = is_signed_imp<T>::type::value); |
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76 | #else |
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77 | BOOST_STATIC_CONSTANT(bool, value = type::value); |
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78 | #endif |
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79 | }; |
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80 | |
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81 | #else |
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82 | |
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83 | template <class T> struct is_signed_imp : public false_type{}; |
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84 | template <> struct is_signed_imp<signed char> : public true_type{}; |
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85 | template <> struct is_signed_imp<const signed char> : public true_type{}; |
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86 | template <> struct is_signed_imp<volatile signed char> : public true_type{}; |
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87 | template <> struct is_signed_imp<const volatile signed char> : public true_type{}; |
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88 | template <> struct is_signed_imp<short> : public true_type{}; |
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89 | template <> struct is_signed_imp<const short> : public true_type{}; |
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90 | template <> struct is_signed_imp<volatile short> : public true_type{}; |
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91 | template <> struct is_signed_imp<const volatile short> : public true_type{}; |
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92 | template <> struct is_signed_imp<int> : public true_type{}; |
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93 | template <> struct is_signed_imp<const int> : public true_type{}; |
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94 | template <> struct is_signed_imp<volatile int> : public true_type{}; |
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95 | template <> struct is_signed_imp<const volatile int> : public true_type{}; |
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96 | template <> struct is_signed_imp<long> : public true_type{}; |
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97 | template <> struct is_signed_imp<const long> : public true_type{}; |
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98 | template <> struct is_signed_imp<volatile long> : public true_type{}; |
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99 | template <> struct is_signed_imp<const volatile long> : public true_type{}; |
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100 | #ifdef BOOST_HAS_LONG_LONG |
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101 | template <> struct is_signed_imp<long long> : public true_type{}; |
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102 | template <> struct is_signed_imp<const long long> : public true_type{}; |
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103 | template <> struct is_signed_imp<volatile long long> : public true_type{}; |
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104 | template <> struct is_signed_imp<const volatile long long> : public true_type{}; |
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105 | #endif |
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106 | #if defined(CHAR_MIN) && (CHAR_MIN != 0) |
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107 | template <> struct is_signed_imp<char> : public true_type{}; |
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108 | template <> struct is_signed_imp<const char> : public true_type{}; |
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109 | template <> struct is_signed_imp<volatile char> : public true_type{}; |
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110 | template <> struct is_signed_imp<const volatile char> : public true_type{}; |
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111 | #endif |
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112 | #if defined(WCHAR_MIN) && (WCHAR_MIN != 0) |
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113 | template <> struct is_signed_imp<wchar_t> : public true_type{}; |
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114 | template <> struct is_signed_imp<const wchar_t> : public true_type{}; |
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115 | template <> struct is_signed_imp<volatile wchar_t> : public true_type{}; |
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116 | template <> struct is_signed_imp<const volatile wchar_t> : public true_type{}; |
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117 | #endif |
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118 | |
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119 | #endif |
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120 | |
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121 | } |
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122 | |
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123 | #endif // !defined( __CODEGEARC__ ) |
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124 | |
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125 | #if defined( __CODEGEARC__ ) |
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126 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,__is_signed(T)) |
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127 | #else |
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128 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_signed,T,::boost::detail::is_signed_imp<T>::value) |
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129 | #endif |
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130 | |
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131 | } // namespace boost |
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132 | |
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133 | #include <boost/type_traits/detail/bool_trait_undef.hpp> |
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134 | |
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135 | #endif // BOOST_TT_IS_MEMBER_FUNCTION_POINTER_HPP_INCLUDED |
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