1 | // Boost Lambda Library -- member_ptr.hpp --------------------- |
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2 | |
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3 | // Copyright (C) 1999, 2000 Jaakko Järvi (jaakko.jarvi@cs.utu.fi) |
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4 | // Copyright (C) 2000 Gary Powell (gary.powell@sierra.com) |
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5 | // |
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6 | // Distributed under the Boost Software License, Version 1.0. (See |
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7 | // accompanying file LICENSE_1_0.txt or copy at |
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8 | // http://www.boost.org/LICENSE_1_0.txt) |
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9 | // |
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10 | // For more information, see www.boost.org |
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11 | |
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12 | // -------------------------------------------------------------------------- |
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13 | |
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14 | #if !defined(BOOST_LAMBDA_MEMBER_PTR_HPP) |
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15 | #define BOOST_LAMBDA_MEMBER_PTR_HPP |
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16 | |
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17 | namespace boost { |
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18 | namespace lambda { |
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19 | |
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20 | |
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21 | class member_pointer_action {}; |
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22 | |
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23 | |
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24 | namespace detail { |
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25 | |
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26 | // the boost type_traits member_pointer traits are not enough, |
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27 | // need to know more details. |
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28 | template<class T> |
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29 | struct member_pointer { |
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30 | typedef typename boost::add_reference<T>::type type; |
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31 | typedef detail::unspecified class_type; |
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32 | typedef detail::unspecified qualified_class_type; |
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33 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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34 | BOOST_STATIC_CONSTANT(bool, is_function_member = false); |
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35 | }; |
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36 | |
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37 | template<class T, class U> |
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38 | struct member_pointer<T U::*> { |
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39 | typedef typename boost::add_reference<T>::type type; |
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40 | typedef U class_type; |
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41 | typedef U qualified_class_type; |
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42 | BOOST_STATIC_CONSTANT(bool, is_data_member = true); |
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43 | BOOST_STATIC_CONSTANT(bool, is_function_member = false); |
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44 | }; |
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45 | |
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46 | template<class T, class U> |
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47 | struct member_pointer<const T U::*> { |
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48 | typedef typename boost::add_reference<const T>::type type; |
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49 | typedef U class_type; |
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50 | typedef const U qualified_class_type; |
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51 | BOOST_STATIC_CONSTANT(bool, is_data_member = true); |
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52 | BOOST_STATIC_CONSTANT(bool, is_function_member = false); |
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53 | }; |
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54 | |
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55 | template<class T, class U> |
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56 | struct member_pointer<volatile T U::*> { |
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57 | typedef typename boost::add_reference<volatile T>::type type; |
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58 | typedef U class_type; |
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59 | typedef volatile U qualified_class_type; |
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60 | BOOST_STATIC_CONSTANT(bool, is_data_member = true); |
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61 | BOOST_STATIC_CONSTANT(bool, is_function_member = false); |
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62 | }; |
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63 | |
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64 | template<class T, class U> |
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65 | struct member_pointer<const volatile T U::*> { |
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66 | typedef typename boost::add_reference<const volatile T>::type type; |
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67 | typedef U class_type; |
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68 | typedef const volatile U qualified_class_type; |
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69 | BOOST_STATIC_CONSTANT(bool, is_data_member = true); |
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70 | BOOST_STATIC_CONSTANT(bool, is_function_member = false); |
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71 | }; |
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72 | |
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73 | // -- nonconst member functions -- |
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74 | template<class T, class U> |
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75 | struct member_pointer<T (U::*)()> { |
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76 | typedef T type; |
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77 | typedef U class_type; |
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78 | typedef U qualified_class_type; |
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79 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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80 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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81 | }; |
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82 | template<class T, class U, class A1> |
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83 | struct member_pointer<T (U::*)(A1)> { |
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84 | typedef T type; |
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85 | typedef U class_type; |
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86 | typedef U qualified_class_type; |
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87 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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88 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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89 | }; |
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90 | template<class T, class U, class A1, class A2> |
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91 | struct member_pointer<T (U::*)(A1, A2)> { |
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92 | typedef T type; |
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93 | typedef U class_type; |
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94 | typedef U qualified_class_type; |
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95 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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96 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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97 | }; |
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98 | template<class T, class U, class A1, class A2, class A3> |
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99 | struct member_pointer<T (U::*)(A1, A2, A3)> { |
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100 | typedef T type; |
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101 | typedef U class_type; |
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102 | typedef U qualified_class_type; |
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103 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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104 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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105 | }; |
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106 | template<class T, class U, class A1, class A2, class A3, class A4> |
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107 | struct member_pointer<T (U::*)(A1, A2, A3, A4)> { |
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108 | typedef T type; |
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109 | typedef U class_type; |
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110 | typedef U qualified_class_type; |
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111 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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112 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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113 | }; |
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114 | template<class T, class U, class A1, class A2, class A3, class A4, class A5> |
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115 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5)> { |
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116 | typedef T type; |
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117 | typedef U class_type; |
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118 | typedef U qualified_class_type; |
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119 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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120 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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121 | }; |
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122 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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123 | class A6> |
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124 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6)> { |
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125 | typedef T type; |
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126 | typedef U class_type; |
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127 | typedef U qualified_class_type; |
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128 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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129 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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130 | }; |
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131 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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132 | class A6, class A7> |
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133 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7)> { |
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134 | typedef T type; |
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135 | typedef U class_type; |
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136 | typedef U qualified_class_type; |
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137 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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138 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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139 | }; |
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140 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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141 | class A6, class A7, class A8> |
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142 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8)> { |
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143 | typedef T type; |
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144 | typedef U class_type; |
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145 | typedef U qualified_class_type; |
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146 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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147 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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148 | }; |
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149 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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150 | class A6, class A7, class A8, class A9> |
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151 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9)> { |
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152 | typedef T type; |
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153 | typedef U class_type; |
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154 | typedef U qualified_class_type; |
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155 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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156 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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157 | }; |
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158 | // -- const member functions -- |
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159 | template<class T, class U> |
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160 | struct member_pointer<T (U::*)() const> { |
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161 | typedef T type; |
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162 | typedef U class_type; |
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163 | typedef const U qualified_class_type; |
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164 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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165 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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166 | }; |
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167 | template<class T, class U, class A1> |
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168 | struct member_pointer<T (U::*)(A1) const> { |
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169 | typedef T type; |
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170 | typedef U class_type; |
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171 | typedef const U qualified_class_type; |
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172 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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173 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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174 | }; |
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175 | template<class T, class U, class A1, class A2> |
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176 | struct member_pointer<T (U::*)(A1, A2) const> { |
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177 | typedef T type; |
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178 | typedef U class_type; |
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179 | typedef const U qualified_class_type; |
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180 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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181 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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182 | }; |
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183 | template<class T, class U, class A1, class A2, class A3> |
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184 | struct member_pointer<T (U::*)(A1, A2, A3) const> { |
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185 | typedef T type; |
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186 | typedef U class_type; |
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187 | typedef const U qualified_class_type; |
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188 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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189 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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190 | }; |
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191 | template<class T, class U, class A1, class A2, class A3, class A4> |
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192 | struct member_pointer<T (U::*)(A1, A2, A3, A4) const> { |
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193 | typedef T type; |
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194 | typedef U class_type; |
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195 | typedef const U qualified_class_type; |
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196 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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197 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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198 | }; |
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199 | template<class T, class U, class A1, class A2, class A3, class A4, class A5> |
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200 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) const> { |
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201 | typedef T type; |
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202 | typedef U class_type; |
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203 | typedef const U qualified_class_type; |
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204 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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205 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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206 | }; |
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207 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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208 | class A6> |
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209 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) const> { |
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210 | typedef T type; |
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211 | typedef U class_type; |
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212 | typedef const U qualified_class_type; |
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213 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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214 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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215 | }; |
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216 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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217 | class A6, class A7> |
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218 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) const> { |
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219 | typedef T type; |
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220 | typedef U class_type; |
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221 | typedef const U qualified_class_type; |
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222 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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223 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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224 | }; |
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225 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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226 | class A6, class A7, class A8> |
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227 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) const> { |
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228 | typedef T type; |
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229 | typedef U class_type; |
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230 | typedef const U qualified_class_type; |
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231 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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232 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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233 | }; |
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234 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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235 | class A6, class A7, class A8, class A9> |
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236 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) const> { |
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237 | typedef T type; |
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238 | typedef U class_type; |
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239 | typedef const U qualified_class_type; |
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240 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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241 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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242 | }; |
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243 | // -- volatile -- |
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244 | template<class T, class U> |
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245 | struct member_pointer<T (U::*)() volatile> { |
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246 | typedef T type; |
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247 | typedef U class_type; |
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248 | typedef volatile U qualified_class_type; |
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249 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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250 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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251 | }; |
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252 | template<class T, class U, class A1> |
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253 | struct member_pointer<T (U::*)(A1) volatile> { |
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254 | typedef T type; |
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255 | typedef U class_type; |
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256 | typedef volatile U qualified_class_type; |
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257 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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258 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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259 | }; |
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260 | template<class T, class U, class A1, class A2> |
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261 | struct member_pointer<T (U::*)(A1, A2) volatile> { |
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262 | typedef T type; |
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263 | typedef U class_type; |
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264 | typedef volatile U qualified_class_type; |
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265 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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266 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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267 | }; |
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268 | template<class T, class U, class A1, class A2, class A3> |
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269 | struct member_pointer<T (U::*)(A1, A2, A3) volatile> { |
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270 | typedef T type; |
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271 | typedef U class_type; |
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272 | typedef volatile U qualified_class_type; |
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273 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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274 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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275 | }; |
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276 | template<class T, class U, class A1, class A2, class A3, class A4> |
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277 | struct member_pointer<T (U::*)(A1, A2, A3, A4) volatile> { |
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278 | typedef T type; |
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279 | typedef U class_type; |
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280 | typedef volatile U qualified_class_type; |
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281 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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282 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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283 | }; |
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284 | template<class T, class U, class A1, class A2, class A3, class A4, class A5> |
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285 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) volatile> { |
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286 | typedef T type; |
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287 | typedef U class_type; |
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288 | typedef volatile U qualified_class_type; |
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289 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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290 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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291 | }; |
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292 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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293 | class A6> |
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294 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) volatile> { |
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295 | typedef T type; |
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296 | typedef U class_type; |
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297 | typedef volatile U qualified_class_type; |
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298 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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299 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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300 | }; |
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301 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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302 | class A6, class A7> |
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303 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) volatile> { |
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304 | typedef T type; |
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305 | typedef U class_type; |
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306 | typedef volatile U qualified_class_type; |
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307 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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308 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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309 | }; |
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310 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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311 | class A6, class A7, class A8> |
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312 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) volatile> { |
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313 | typedef T type; |
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314 | typedef U class_type; |
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315 | typedef volatile U qualified_class_type; |
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316 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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317 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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318 | }; |
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319 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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320 | class A6, class A7, class A8, class A9> |
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321 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) volatile> { |
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322 | typedef T type; |
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323 | typedef U class_type; |
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324 | typedef volatile U qualified_class_type; |
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325 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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326 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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327 | }; |
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328 | // -- const volatile |
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329 | template<class T, class U> |
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330 | struct member_pointer<T (U::*)() const volatile> { |
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331 | typedef T type; |
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332 | typedef U class_type; |
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333 | typedef const volatile U qualified_class_type; |
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334 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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335 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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336 | }; |
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337 | template<class T, class U, class A1> |
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338 | struct member_pointer<T (U::*)(A1) const volatile> { |
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339 | typedef T type; |
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340 | typedef U class_type; |
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341 | typedef const volatile U qualified_class_type; |
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342 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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343 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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344 | }; |
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345 | template<class T, class U, class A1, class A2> |
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346 | struct member_pointer<T (U::*)(A1, A2) const volatile> { |
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347 | typedef T type; |
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348 | typedef U class_type; |
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349 | typedef const volatile U qualified_class_type; |
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350 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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351 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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352 | }; |
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353 | template<class T, class U, class A1, class A2, class A3> |
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354 | struct member_pointer<T (U::*)(A1, A2, A3) const volatile> { |
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355 | typedef T type; |
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356 | typedef U class_type; |
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357 | typedef const volatile U qualified_class_type; |
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358 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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359 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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360 | }; |
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361 | template<class T, class U, class A1, class A2, class A3, class A4> |
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362 | struct member_pointer<T (U::*)(A1, A2, A3, A4) const volatile> { |
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363 | typedef T type; |
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364 | typedef U class_type; |
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365 | typedef const volatile U qualified_class_type; |
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366 | }; |
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367 | template<class T, class U, class A1, class A2, class A3, class A4, class A5> |
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368 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5) const volatile> { |
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369 | typedef T type; |
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370 | typedef U class_type; |
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371 | typedef const volatile U qualified_class_type; |
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372 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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373 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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374 | }; |
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375 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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376 | class A6> |
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377 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6) const volatile> { |
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378 | typedef T type; |
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379 | typedef U class_type; |
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380 | typedef const volatile U qualified_class_type; |
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381 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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382 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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383 | }; |
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384 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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385 | class A6, class A7> |
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386 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7) const volatile> { |
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387 | typedef T type; |
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388 | typedef U class_type; |
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389 | typedef const volatile U qualified_class_type; |
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390 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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391 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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392 | }; |
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393 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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394 | class A6, class A7, class A8> |
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395 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8) const volatile> { |
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396 | typedef T type; |
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397 | typedef U class_type; |
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398 | typedef const volatile U qualified_class_type; |
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399 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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400 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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401 | }; |
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402 | template<class T, class U, class A1, class A2, class A3, class A4, class A5, |
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403 | class A6, class A7, class A8, class A9> |
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404 | struct member_pointer<T (U::*)(A1, A2, A3, A4, A5, A6, A7, A8, A9) const volatile> { |
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405 | typedef T type; |
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406 | typedef U class_type; |
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407 | typedef const volatile U qualified_class_type; |
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408 | BOOST_STATIC_CONSTANT(bool, is_data_member = false); |
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409 | BOOST_STATIC_CONSTANT(bool, is_function_member = true); |
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410 | }; |
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411 | |
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412 | } // detail |
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413 | |
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414 | namespace detail { |
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415 | |
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416 | // this class holds a pointer to a member function and the object. |
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417 | // when called, it just calls the member function with the parameters |
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418 | // provided |
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419 | |
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420 | // It would have been possible to use existing lambda_functors to represent |
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421 | // a bound member function like this, but to have a separate template is |
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422 | // safer, since now this functor doesn't mix and match with lambda_functors |
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423 | // only thing you can do with this is to call it |
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424 | |
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425 | // note that previously instantiated classes |
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426 | // (other_action<member_pointer_action> and member_pointer_action_helper |
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427 | // guarantee, that A and B are |
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428 | // such types, that for objects a and b of corresponding types, a->*b leads |
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429 | // to the builtin ->* to be called. So types that would end in a call to |
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430 | // a user defined ->* do not create a member_pointer_caller object. |
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431 | |
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432 | template<class RET, class A, class B> |
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433 | class member_pointer_caller { |
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434 | A a; B b; |
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435 | |
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436 | public: |
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437 | member_pointer_caller(const A& aa, const B& bb) : a(aa), b(bb) {} |
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438 | |
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439 | RET operator()() const { return (a->*b)(); } |
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440 | |
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441 | template<class A1> |
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442 | RET operator()(const A1& a1) const { return (a->*b)(a1); } |
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443 | |
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444 | template<class A1, class A2> |
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445 | RET operator()(const A1& a1, const A2& a2) const { return (a->*b)(a1, a2); } |
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446 | |
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447 | template<class A1, class A2, class A3> |
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448 | RET operator()(const A1& a1, const A2& a2, const A3& a3) const { |
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449 | return (a->*b)(a1, a2, a3); |
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450 | } |
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451 | |
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452 | template<class A1, class A2, class A3, class A4> |
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453 | RET operator()(const A1& a1, const A2& a2, const A3& a3, |
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454 | const A4& a4) const { |
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455 | return (a->*b)(a1, a2, a3, a4); |
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456 | } |
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457 | |
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458 | template<class A1, class A2, class A3, class A4, class A5> |
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459 | RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4, |
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460 | const A5& a5) const { |
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461 | return (a->*b)(a1, a2, a3, a4, a5); |
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462 | } |
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463 | |
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464 | template<class A1, class A2, class A3, class A4, class A5, class A6> |
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465 | RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4, |
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466 | const A5& a5, const A6& a6) const { |
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467 | return (a->*b)(a1, a2, a3, a4, a5, a6); |
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468 | } |
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469 | |
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470 | template<class A1, class A2, class A3, class A4, class A5, class A6, |
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471 | class A7> |
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472 | RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4, |
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473 | const A5& a5, const A6& a6, const A7& a7) const { |
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474 | return (a->*b)(a1, a2, a3, a4, a5, a6, a7); |
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475 | } |
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476 | |
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477 | template<class A1, class A2, class A3, class A4, class A5, class A6, |
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478 | class A7, class A8> |
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479 | RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4, |
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480 | const A5& a5, const A6& a6, const A7& a7, |
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481 | const A8& a8) const { |
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482 | return (a->*b)(a1, a2, a3, a4, a5, a6, a7, a8); |
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483 | } |
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484 | |
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485 | template<class A1, class A2, class A3, class A4, class A5, class A6, |
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486 | class A7, class A8, class A9> |
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487 | RET operator()(const A1& a1, const A2& a2, const A3& a3, const A4& a4, |
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488 | const A5& a5, const A6& a6, const A7& a7, |
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489 | const A8& a8, const A9& a9) const { |
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490 | return (a->*b)(a1, a2, a3, a4, a5, a6, a7, a8, a9); |
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491 | } |
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492 | |
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493 | }; |
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494 | |
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495 | // helper templates for return type deduction and action classes |
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496 | // different cases for data member, function member, neither |
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497 | |
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498 | // true-true case |
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499 | template <bool Is_data_member, bool Is_function_member> |
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500 | struct member_pointer_action_helper; |
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501 | // cannot be both, no body provided |
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502 | |
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503 | // data member case |
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504 | // this means, that B is a data member and A is a pointer type, |
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505 | // so either built-in ->* should be called, or there is an error |
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506 | template <> |
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507 | struct member_pointer_action_helper<true, false> { |
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508 | public: |
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509 | |
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510 | template<class RET, class A, class B> |
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511 | static RET apply(A& a, B& b) { |
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512 | return a->*b; |
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513 | } |
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514 | |
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515 | template<class A, class B> |
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516 | struct return_type { |
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517 | private: |
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518 | typedef typename detail::remove_reference_and_cv<B>::type plainB; |
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519 | |
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520 | typedef typename detail::member_pointer<plainB>::type type0; |
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521 | // we remove the reference now, as we may have to add cv:s |
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522 | typedef typename boost::remove_reference<type0>::type type1; |
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523 | |
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524 | // A is a reference to pointer |
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525 | // remove the top level cv qualifiers and reference |
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526 | typedef typename |
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527 | detail::remove_reference_and_cv<A>::type non_ref_A; |
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528 | |
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529 | // A is a pointer type, so take the type pointed to |
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530 | typedef typename ::boost::remove_pointer<non_ref_A>::type non_pointer_A; |
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531 | |
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532 | public: |
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533 | // For non-reference types, we must add const and/or volatile if |
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534 | // the pointer type has these qualifiers |
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535 | // If the member is a reference, these do not have any effect |
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536 | // (cv T == T if T is a reference type) |
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537 | typedef typename detail::IF< |
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538 | ::boost::is_const<non_pointer_A>::value, |
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539 | typename ::boost::add_const<type1>::type, |
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540 | type1 |
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541 | >::RET type2; |
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542 | typedef typename detail::IF< |
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543 | ::boost::is_volatile<non_pointer_A>::value, |
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544 | typename ::boost::add_volatile<type2>::type, |
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545 | type2 |
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546 | >::RET type3; |
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547 | // add reference back |
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548 | typedef typename ::boost::add_reference<type3>::type type; |
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549 | }; |
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550 | }; |
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551 | |
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552 | // neither case |
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553 | template <> |
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554 | struct member_pointer_action_helper<false, false> { |
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555 | public: |
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556 | template<class RET, class A, class B> |
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557 | static RET apply(A& a, B& b) { |
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558 | // not a built in member pointer operator, just call ->* |
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559 | return a->*b; |
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560 | } |
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561 | // an overloaded member pointer operators, user should have specified |
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562 | // the return type |
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563 | // At this point we know that there is no matching specialization for |
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564 | // return_type_2, so try return_type_2_plain |
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565 | template<class A, class B> |
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566 | struct return_type { |
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567 | |
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568 | typedef typename plain_return_type_2< |
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569 | other_action<member_pointer_action>, A, B |
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570 | >::type type; |
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571 | }; |
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572 | |
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573 | }; |
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574 | |
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575 | |
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576 | // member pointer function case |
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577 | // This is a built in ->* call for a member function, |
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578 | // the only thing that you can do with that, is to give it some arguments |
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579 | // note, it is guaranteed that A is a pointer type, and thus it cannot |
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580 | // be a call to overloaded ->* |
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581 | template <> |
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582 | struct member_pointer_action_helper<false, true> { |
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583 | public: |
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584 | |
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585 | template<class RET, class A, class B> |
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586 | static RET apply(A& a, B& b) { |
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587 | typedef typename ::boost::remove_cv<B>::type plainB; |
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588 | typedef typename detail::member_pointer<plainB>::type ret_t; |
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589 | typedef typename ::boost::remove_cv<A>::type plainA; |
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590 | |
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591 | // we always strip cv:s to |
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592 | // make the two routes (calling and type deduction) |
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593 | // to give the same results (and the const does not make any functional |
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594 | // difference) |
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595 | return detail::member_pointer_caller<ret_t, plainA, plainB>(a, b); |
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596 | } |
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597 | |
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598 | template<class A, class B> |
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599 | struct return_type { |
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600 | typedef typename detail::remove_reference_and_cv<B>::type plainB; |
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601 | typedef typename detail::member_pointer<plainB>::type ret_t; |
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602 | typedef typename detail::remove_reference_and_cv<A>::type plainA; |
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603 | |
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604 | typedef detail::member_pointer_caller<ret_t, plainA, plainB> type; |
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605 | }; |
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606 | }; |
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607 | |
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608 | } // detail |
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609 | |
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610 | template<> class other_action<member_pointer_action> { |
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611 | public: |
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612 | template<class RET, class A, class B> |
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613 | static RET apply(A& a, B& b) { |
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614 | typedef typename |
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615 | ::boost::remove_cv<B>::type plainB; |
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616 | |
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617 | return detail::member_pointer_action_helper< |
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618 | boost::is_pointer<A>::value && |
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619 | detail::member_pointer<plainB>::is_data_member, |
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620 | boost::is_pointer<A>::value && |
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621 | detail::member_pointer<plainB>::is_function_member |
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622 | >::template apply<RET>(a, b); |
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623 | } |
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624 | }; |
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625 | |
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626 | // return type deduction -- |
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627 | |
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628 | // If the right argument is a pointer to data member, |
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629 | // and the left argument is of compatible pointer to class type |
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630 | // return type is a reference to the data member type |
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631 | |
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632 | // if right argument is a pointer to a member function, and the left |
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633 | // argument is of a compatible type, the return type is a |
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634 | // member_pointer_caller (see above) |
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635 | |
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636 | // Otherwise, return type deduction fails. There is either an error, |
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637 | // or the user is trying to call an overloaded ->* |
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638 | // In such a case either ret<> must be used, or a return_type_2 user |
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639 | // defined specialization must be provided |
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640 | |
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641 | |
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642 | template<class A, class B> |
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643 | struct return_type_2<other_action<member_pointer_action>, A, B> { |
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644 | private: |
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645 | typedef typename |
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646 | detail::remove_reference_and_cv<B>::type plainB; |
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647 | public: |
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648 | typedef typename |
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649 | detail::member_pointer_action_helper< |
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650 | detail::member_pointer<plainB>::is_data_member, |
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651 | detail::member_pointer<plainB>::is_function_member |
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652 | >::template return_type<A, B>::type type; |
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653 | }; |
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654 | |
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655 | // this is the way the generic lambda_functor_base functions instantiate |
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656 | // return type deduction. We turn it into return_type_2, so that the |
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657 | // user can provide specializations on that level. |
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658 | template<class Args> |
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659 | struct return_type_N<other_action<member_pointer_action>, Args> { |
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660 | typedef typename boost::tuples::element<0, Args>::type A; |
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661 | typedef typename boost::tuples::element<1, Args>::type B; |
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662 | typedef typename |
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663 | return_type_2<other_action<member_pointer_action>, |
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664 | typename boost::remove_reference<A>::type, |
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665 | typename boost::remove_reference<B>::type |
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666 | >::type type; |
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667 | }; |
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668 | |
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669 | |
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670 | template<class Arg1, class Arg2> |
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671 | inline const |
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672 | lambda_functor< |
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673 | lambda_functor_base< |
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674 | action<2, other_action<member_pointer_action> >, |
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675 | tuple<lambda_functor<Arg1>, typename const_copy_argument<Arg2>::type> |
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676 | > |
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677 | > |
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678 | operator->*(const lambda_functor<Arg1>& a1, const Arg2& a2) |
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679 | { |
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680 | return |
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681 | lambda_functor_base< |
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682 | action<2, other_action<member_pointer_action> >, |
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683 | tuple<lambda_functor<Arg1>, typename const_copy_argument<Arg2>::type> |
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684 | > |
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685 | (tuple<lambda_functor<Arg1>, |
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686 | typename const_copy_argument<Arg2>::type>(a1, a2)); |
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687 | } |
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688 | |
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689 | template<class Arg1, class Arg2> |
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690 | inline const |
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691 | lambda_functor< |
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692 | lambda_functor_base< |
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693 | action<2, other_action<member_pointer_action> >, |
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694 | tuple<lambda_functor<Arg1>, lambda_functor<Arg2> > |
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695 | > |
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696 | > |
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697 | operator->*(const lambda_functor<Arg1>& a1, const lambda_functor<Arg2>& a2) |
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698 | { |
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699 | return |
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700 | lambda_functor_base< |
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701 | action<2, other_action<member_pointer_action> >, |
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702 | tuple<lambda_functor<Arg1>, lambda_functor<Arg2> > |
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703 | > |
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704 | (tuple<lambda_functor<Arg1>, lambda_functor<Arg2> >(a1, a2)); |
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705 | } |
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706 | |
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707 | template<class Arg1, class Arg2> |
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708 | inline const |
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709 | lambda_functor< |
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710 | lambda_functor_base< |
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711 | action<2, other_action<member_pointer_action> >, |
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712 | tuple<typename const_copy_argument<Arg1>::type, lambda_functor<Arg2> > |
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713 | > |
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714 | > |
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715 | operator->*(const Arg1& a1, const lambda_functor<Arg2>& a2) |
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716 | { |
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717 | return |
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718 | lambda_functor_base< |
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719 | action<2, other_action<member_pointer_action> >, |
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720 | tuple<typename const_copy_argument<Arg1>::type, lambda_functor<Arg2> > |
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721 | > |
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722 | (tuple<typename const_copy_argument<Arg1>::type, |
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723 | lambda_functor<Arg2> >(a1, a2)); |
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724 | } |
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725 | |
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726 | |
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727 | } // namespace lambda |
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728 | } // namespace boost |
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729 | |
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730 | |
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731 | #endif |
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732 | |
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733 | |
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734 | |
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735 | |
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736 | |
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737 | |
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