1 | // Copyright (C) 2004 Peder Holt |
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2 | // Use, modification and distribution is subject to the Boost Software |
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3 | // License, Version 1.0. (http://www.boost.org/LICENSE_1_0.txt) |
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4 | |
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5 | #ifndef BOOST_TYPE_TRAITS_MSVC_REMOVE_CONST_HOLT_2004_0828 |
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6 | #define BOOST_TYPE_TRAITS_MSVC_REMOVE_CONST_HOLT_2004_0828 |
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7 | |
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8 | #include <boost/type_traits/msvc/typeof.hpp> |
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9 | #include <boost/type_traits/is_volatile.hpp> |
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10 | #include <boost/type_traits/is_const.hpp> |
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11 | #include <boost/type_traits/is_pointer.hpp> |
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12 | #include <boost/type_traits/is_array.hpp> |
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13 | |
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14 | namespace boost { |
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15 | namespace detail { |
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16 | template<bool IsPointer,bool IsArray,bool IsConst,bool IsVolatile> |
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17 | struct remove_const_impl_typeof { |
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18 | template<typename T,typename ID> |
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19 | struct inner { |
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20 | typedef T type; |
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21 | }; |
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22 | template<typename T> |
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23 | struct transform_type { |
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24 | typedef T type; |
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25 | }; |
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26 | }; |
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27 | template<> //Const |
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28 | struct remove_const_impl_typeof<false,false,true,false> { |
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29 | template<typename T,typename ID> |
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30 | struct inner { |
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31 | template<typename U> |
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32 | static msvc_register_type<U,ID> test(U const&(*)()); |
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33 | static msvc_register_type<T,ID> test(...); |
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34 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (T(*)())(NULL) ) )); |
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35 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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36 | }; |
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37 | template<typename T> |
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38 | struct transform_type { |
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39 | typedef T& type; |
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40 | }; |
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41 | }; |
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42 | template<> //CV |
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43 | struct remove_const_impl_typeof<false,false,true,true> { |
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44 | template<typename T,typename ID> |
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45 | struct inner { |
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46 | template<typename U> |
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47 | static msvc_register_type<U volatile,ID> test(U const volatile&(*)()); |
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48 | static msvc_register_type<T,ID> test(...); |
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49 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (T(*)())(NULL) ) )); |
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50 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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51 | }; |
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52 | template<typename T> |
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53 | struct transform_type { |
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54 | typedef T& type; |
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55 | }; |
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56 | }; |
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57 | template<> //Const Pointer |
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58 | struct remove_const_impl_typeof<true,false,true,false> { |
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59 | template<typename T,typename ID> |
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60 | struct inner { |
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61 | template<typename U> |
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62 | static msvc_register_type<U,ID> test(void(*)(U const[])); |
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63 | static msvc_register_type<T,ID> test(...); |
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64 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (void(*)(T))(NULL) ) )); |
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65 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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66 | }; |
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67 | template<typename T> |
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68 | struct transform_type { |
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69 | typedef T type[]; |
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70 | }; |
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71 | }; |
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72 | template<> //CV Pointer |
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73 | struct remove_const_impl_typeof<true,false,true,true> { |
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74 | template<typename T,typename ID> |
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75 | struct inner { |
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76 | template<typename U> |
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77 | static msvc_register_type<U volatile,ID> test(void(*)(U const volatile[])); |
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78 | static msvc_register_type<T,ID> test(...); |
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79 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (void(*)(T))(NULL) ) )); |
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80 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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81 | }; |
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82 | template<typename T> |
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83 | struct transform_type { |
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84 | typedef T type[]; |
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85 | }; |
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86 | }; |
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87 | template<> //Const Array |
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88 | struct remove_const_impl_typeof<false,true,true,false> { |
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89 | template<typename T,typename ID> |
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90 | struct inner { |
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91 | BOOST_STATIC_CONSTANT(unsigned,value=(sizeof(T)/sizeof((*((T*)NULL))[0]))); |
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92 | |
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93 | template<typename U> |
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94 | static msvc_register_type<U[value],ID> test(void(*)(U const[])); |
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95 | static msvc_register_type<T,ID> test(...); |
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96 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (void(*)(T))(NULL) ) )); |
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97 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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98 | }; |
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99 | template<typename T> |
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100 | struct transform_type { |
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101 | typedef T type; |
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102 | }; |
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103 | }; |
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104 | |
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105 | template<> //CV Array |
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106 | struct remove_const_impl_typeof<false,true,true,true> { |
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107 | template<typename T,typename ID> |
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108 | struct inner { |
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109 | BOOST_STATIC_CONSTANT(unsigned,value=(sizeof(T)/sizeof((*((T*)NULL))[0]))); |
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110 | |
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111 | template<typename U> |
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112 | static msvc_register_type<U volatile[value],ID> test(void(*)(U const volatile[])); |
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113 | static msvc_register_type<T,ID> test(...); |
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114 | BOOST_STATIC_CONSTANT(unsigned,register_test=sizeof(test( (void(*)(T))(NULL) ) )); |
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115 | typedef typename msvc_extract_type<ID>::id2type::type type; |
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116 | }; |
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117 | template<typename T> |
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118 | struct transform_type { |
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119 | typedef T type; |
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120 | }; |
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121 | }; |
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122 | |
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123 | } //namespace detail |
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124 | |
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125 | template<typename T> |
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126 | struct remove_const { |
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127 | typedef boost::detail::remove_const_impl_typeof< |
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128 | boost::is_pointer<T>::value, |
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129 | boost::is_array<T>::value, |
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130 | boost::is_const<T>::value, |
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131 | boost::is_volatile<T>::value |
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132 | > remove_const_type; |
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133 | typedef typename |
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134 | remove_const_type::template inner< |
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135 | typename remove_const_type::template transform_type<T>::type, |
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136 | remove_const<T> |
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137 | >::type |
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138 | type; |
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139 | BOOST_MPL_AUX_LAMBDA_SUPPORT(1,remove_const,T) |
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140 | }; |
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141 | }//namespace boost |
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142 | |
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143 | #endif //BOOST_TYPE_TRAITS_MSVC_REMOVE_CONST_HOLT_2004_0828 |
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