1 | // |
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2 | // (C) Copyright Jeremy Siek 2000. |
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3 | // Distributed under the Boost Software License, Version 1.0. (See |
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4 | // 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 | // Revision History: |
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8 | // |
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9 | // 17 July 2001: Added const to some member functions. (Jeremy Siek) |
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10 | // 05 May 2001: Removed static dummy_cons object. (Jeremy Siek) |
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11 | |
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12 | // See http://www.boost.org/libs/concept_check for documentation. |
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13 | |
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14 | #ifndef BOOST_CONCEPT_ARCHETYPES_HPP |
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15 | #define BOOST_CONCEPT_ARCHETYPES_HPP |
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16 | |
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17 | #include <boost/config.hpp> |
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18 | #include <boost/iterator.hpp> |
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19 | #include <boost/mpl/identity.hpp> |
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20 | #include <functional> |
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21 | |
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22 | namespace boost { |
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23 | |
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24 | //=========================================================================== |
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25 | // Basic Archetype Classes |
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26 | |
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27 | namespace detail { |
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28 | class dummy_constructor { }; |
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29 | } |
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30 | |
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31 | // A type that models no concept. The template parameter |
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32 | // is only there so that null_archetype types can be created |
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33 | // that have different type. |
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34 | template <class T = int> |
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35 | class null_archetype { |
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36 | private: |
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37 | null_archetype() { } |
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38 | null_archetype(const null_archetype&) { } |
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39 | null_archetype& operator=(const null_archetype&) { return *this; } |
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40 | public: |
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41 | null_archetype(detail::dummy_constructor) { } |
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42 | #ifndef __MWERKS__ |
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43 | template <class TT> |
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44 | friend void dummy_friend(); // just to avoid warnings |
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45 | #endif |
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46 | }; |
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47 | |
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48 | // This is a helper class that provides a way to get a reference to |
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49 | // an object. The get() function will never be called at run-time |
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50 | // (nothing in this file will) so this seemingly very bad function |
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51 | // is really quite innocent. The name of this class needs to be |
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52 | // changed. |
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53 | template <class T> |
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54 | class static_object |
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55 | { |
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56 | public: |
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57 | static T& get() |
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58 | { |
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59 | #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) |
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60 | return *reinterpret_cast<T*>(0); |
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61 | #else |
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62 | static char d[sizeof(T)]; |
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63 | return *reinterpret_cast<T*>(d); |
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64 | #endif |
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65 | } |
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66 | }; |
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67 | |
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68 | template <class Base = null_archetype<> > |
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69 | class default_constructible_archetype : public Base { |
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70 | public: |
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71 | default_constructible_archetype() |
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72 | : Base(static_object<detail::dummy_constructor>::get()) { } |
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73 | default_constructible_archetype(detail::dummy_constructor x) : Base(x) { } |
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74 | }; |
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75 | |
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76 | template <class Base = null_archetype<> > |
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77 | class assignable_archetype : public Base { |
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78 | assignable_archetype() { } |
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79 | assignable_archetype(const assignable_archetype&) { } |
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80 | public: |
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81 | assignable_archetype& operator=(const assignable_archetype&) { |
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82 | return *this; |
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83 | } |
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84 | assignable_archetype(detail::dummy_constructor x) : Base(x) { } |
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85 | }; |
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86 | |
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87 | template <class Base = null_archetype<> > |
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88 | class copy_constructible_archetype : public Base { |
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89 | public: |
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90 | copy_constructible_archetype() |
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91 | : Base(static_object<detail::dummy_constructor>::get()) { } |
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92 | copy_constructible_archetype(const copy_constructible_archetype&) |
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93 | : Base(static_object<detail::dummy_constructor>::get()) { } |
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94 | copy_constructible_archetype(detail::dummy_constructor x) : Base(x) { } |
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95 | }; |
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96 | |
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97 | template <class Base = null_archetype<> > |
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98 | class sgi_assignable_archetype : public Base { |
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99 | public: |
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100 | sgi_assignable_archetype(const sgi_assignable_archetype&) |
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101 | : Base(static_object<detail::dummy_constructor>::get()) { } |
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102 | sgi_assignable_archetype& operator=(const sgi_assignable_archetype&) { |
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103 | return *this; |
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104 | } |
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105 | sgi_assignable_archetype(const detail::dummy_constructor& x) : Base(x) { } |
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106 | }; |
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107 | |
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108 | struct default_archetype_base { |
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109 | default_archetype_base(detail::dummy_constructor) { } |
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110 | }; |
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111 | |
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112 | // Careful, don't use same type for T and Base. That results in the |
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113 | // conversion operator being invalid. Since T is often |
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114 | // null_archetype, can't use null_archetype for Base. |
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115 | template <class T, class Base = default_archetype_base> |
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116 | class convertible_to_archetype : public Base { |
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117 | private: |
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118 | convertible_to_archetype() { } |
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119 | convertible_to_archetype(const convertible_to_archetype& ) { } |
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120 | convertible_to_archetype& operator=(const convertible_to_archetype&) |
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121 | { return *this; } |
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122 | public: |
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123 | convertible_to_archetype(detail::dummy_constructor x) : Base(x) { } |
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124 | operator const T&() const { return static_object<T>::get(); } |
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125 | }; |
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126 | |
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127 | template <class T, class Base = default_archetype_base> |
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128 | class convertible_from_archetype : public Base { |
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129 | private: |
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130 | convertible_from_archetype() { } |
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131 | convertible_from_archetype(const convertible_from_archetype& ) { } |
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132 | convertible_from_archetype& operator=(const convertible_from_archetype&) |
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133 | { return *this; } |
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134 | public: |
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135 | convertible_from_archetype(detail::dummy_constructor x) : Base(x) { } |
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136 | convertible_from_archetype(const T&) { } |
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137 | convertible_from_archetype& operator=(const T&) |
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138 | { return *this; } |
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139 | }; |
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140 | |
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141 | class boolean_archetype { |
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142 | public: |
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143 | boolean_archetype(const boolean_archetype&) { } |
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144 | operator bool() const { return true; } |
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145 | boolean_archetype(detail::dummy_constructor) { } |
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146 | private: |
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147 | boolean_archetype() { } |
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148 | boolean_archetype& operator=(const boolean_archetype&) { return *this; } |
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149 | }; |
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150 | |
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151 | template <class Base = null_archetype<> > |
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152 | class equality_comparable_archetype : public Base { |
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153 | public: |
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154 | equality_comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
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155 | }; |
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156 | template <class Base> |
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157 | boolean_archetype |
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158 | operator==(const equality_comparable_archetype<Base>&, |
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159 | const equality_comparable_archetype<Base>&) |
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160 | { |
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161 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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162 | } |
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163 | template <class Base> |
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164 | boolean_archetype |
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165 | operator!=(const equality_comparable_archetype<Base>&, |
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166 | const equality_comparable_archetype<Base>&) |
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167 | { |
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168 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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169 | } |
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170 | |
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171 | |
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172 | template <class Base = null_archetype<> > |
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173 | class equality_comparable2_first_archetype : public Base { |
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174 | public: |
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175 | equality_comparable2_first_archetype(detail::dummy_constructor x) |
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176 | : Base(x) { } |
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177 | }; |
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178 | template <class Base = null_archetype<> > |
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179 | class equality_comparable2_second_archetype : public Base { |
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180 | public: |
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181 | equality_comparable2_second_archetype(detail::dummy_constructor x) |
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182 | : Base(x) { } |
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183 | }; |
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184 | template <class Base1, class Base2> |
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185 | boolean_archetype |
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186 | operator==(const equality_comparable2_first_archetype<Base1>&, |
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187 | const equality_comparable2_second_archetype<Base2>&) |
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188 | { |
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189 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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190 | } |
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191 | template <class Base1, class Base2> |
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192 | boolean_archetype |
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193 | operator!=(const equality_comparable2_first_archetype<Base1>&, |
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194 | const equality_comparable2_second_archetype<Base2>&) |
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195 | { |
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196 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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197 | } |
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198 | |
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199 | |
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200 | template <class Base = null_archetype<> > |
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201 | class less_than_comparable_archetype : public Base { |
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202 | public: |
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203 | less_than_comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
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204 | }; |
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205 | template <class Base> |
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206 | boolean_archetype |
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207 | operator<(const less_than_comparable_archetype<Base>&, |
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208 | const less_than_comparable_archetype<Base>&) |
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209 | { |
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210 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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211 | } |
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212 | |
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213 | |
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214 | |
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215 | template <class Base = null_archetype<> > |
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216 | class comparable_archetype : public Base { |
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217 | public: |
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218 | comparable_archetype(detail::dummy_constructor x) : Base(x) { } |
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219 | }; |
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220 | template <class Base> |
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221 | boolean_archetype |
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222 | operator<(const comparable_archetype<Base>&, |
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223 | const comparable_archetype<Base>&) |
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224 | { |
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225 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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226 | } |
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227 | template <class Base> |
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228 | boolean_archetype |
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229 | operator<=(const comparable_archetype<Base>&, |
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230 | const comparable_archetype<Base>&) |
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231 | { |
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232 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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233 | } |
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234 | template <class Base> |
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235 | boolean_archetype |
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236 | operator>(const comparable_archetype<Base>&, |
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237 | const comparable_archetype<Base>&) |
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238 | { |
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239 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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240 | } |
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241 | template <class Base> |
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242 | boolean_archetype |
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243 | operator>=(const comparable_archetype<Base>&, |
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244 | const comparable_archetype<Base>&) |
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245 | { |
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246 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); |
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247 | } |
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248 | |
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249 | |
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250 | // The purpose of the optags is so that one can specify |
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251 | // exactly which types the operator< is defined between. |
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252 | // This is useful for allowing the operations: |
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253 | // |
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254 | // A a; B b; |
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255 | // a < b |
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256 | // b < a |
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257 | // |
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258 | // without also allowing the combinations: |
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259 | // |
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260 | // a < a |
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261 | // b < b |
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262 | // |
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263 | struct optag1 { }; |
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264 | struct optag2 { }; |
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265 | struct optag3 { }; |
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266 | |
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267 | #define BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(OP, NAME) \ |
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268 | template <class Base = null_archetype<>, class Tag = optag1 > \ |
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269 | class NAME##_first_archetype : public Base { \ |
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270 | public: \ |
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271 | NAME##_first_archetype(detail::dummy_constructor x) : Base(x) { } \ |
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272 | }; \ |
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273 | \ |
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274 | template <class Base = null_archetype<>, class Tag = optag1 > \ |
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275 | class NAME##_second_archetype : public Base { \ |
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276 | public: \ |
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277 | NAME##_second_archetype(detail::dummy_constructor x) : Base(x) { } \ |
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278 | }; \ |
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279 | \ |
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280 | template <class BaseFirst, class BaseSecond, class Tag> \ |
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281 | boolean_archetype \ |
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282 | operator OP (const NAME##_first_archetype<BaseFirst, Tag>&, \ |
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283 | const NAME##_second_archetype<BaseSecond, Tag>&) \ |
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284 | { \ |
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285 | return boolean_archetype(static_object<detail::dummy_constructor>::get()); \ |
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286 | } |
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287 | |
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288 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(==, equal_op) |
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289 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(!=, not_equal_op) |
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290 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(<, less_than_op) |
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291 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(<=, less_equal_op) |
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292 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(>, greater_than_op) |
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293 | BOOST_DEFINE_BINARY_PREDICATE_ARCHETYPE(>=, greater_equal_op) |
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294 | |
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295 | #define BOOST_DEFINE_OPERATOR_ARCHETYPE(OP, NAME) \ |
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296 | template <class Base = null_archetype<> > \ |
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297 | class NAME##_archetype : public Base { \ |
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298 | public: \ |
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299 | NAME##_archetype(detail::dummy_constructor x) : Base(x) { } \ |
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300 | NAME##_archetype(const NAME##_archetype&) \ |
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301 | : Base(static_object<detail::dummy_constructor>::get()) { } \ |
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302 | NAME##_archetype& operator=(const NAME##_archetype&) { return *this; } \ |
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303 | }; \ |
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304 | template <class Base> \ |
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305 | NAME##_archetype<Base> \ |
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306 | operator OP (const NAME##_archetype<Base>&,\ |
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307 | const NAME##_archetype<Base>&) \ |
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308 | { \ |
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309 | return \ |
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310 | NAME##_archetype<Base>(static_object<detail::dummy_constructor>::get()); \ |
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311 | } |
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312 | |
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313 | BOOST_DEFINE_OPERATOR_ARCHETYPE(+, addable) |
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314 | BOOST_DEFINE_OPERATOR_ARCHETYPE(-, subtractable) |
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315 | BOOST_DEFINE_OPERATOR_ARCHETYPE(*, multipliable) |
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316 | BOOST_DEFINE_OPERATOR_ARCHETYPE(/, dividable) |
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317 | BOOST_DEFINE_OPERATOR_ARCHETYPE(%, modable) |
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318 | |
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319 | // As is, these are useless because of the return type. |
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320 | // Need to invent a better way... |
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321 | #define BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(OP, NAME) \ |
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322 | template <class Return, class Base = null_archetype<> > \ |
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323 | class NAME##_first_archetype : public Base { \ |
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324 | public: \ |
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325 | NAME##_first_archetype(detail::dummy_constructor x) : Base(x) { } \ |
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326 | }; \ |
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327 | \ |
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328 | template <class Return, class Base = null_archetype<> > \ |
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329 | class NAME##_second_archetype : public Base { \ |
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330 | public: \ |
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331 | NAME##_second_archetype(detail::dummy_constructor x) : Base(x) { } \ |
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332 | }; \ |
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333 | \ |
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334 | template <class Return, class BaseFirst, class BaseSecond> \ |
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335 | Return \ |
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336 | operator OP (const NAME##_first_archetype<Return, BaseFirst>&, \ |
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337 | const NAME##_second_archetype<Return, BaseSecond>&) \ |
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338 | { \ |
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339 | return Return(static_object<detail::dummy_constructor>::get()); \ |
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340 | } |
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341 | |
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342 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(+, plus_op) |
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343 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(*, time_op) |
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344 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(/, divide_op) |
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345 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(-, subtract_op) |
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346 | BOOST_DEFINE_BINARY_OPERATOR_ARCHETYPE(%, mod_op) |
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347 | |
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348 | //=========================================================================== |
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349 | // Function Object Archetype Classes |
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350 | |
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351 | template <class Return> |
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352 | class generator_archetype { |
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353 | public: |
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354 | const Return& operator()() { |
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355 | return static_object<Return>::get(); |
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356 | } |
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357 | }; |
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358 | |
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359 | class void_generator_archetype { |
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360 | public: |
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361 | void operator()() { } |
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362 | }; |
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363 | |
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364 | template <class Arg, class Return> |
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365 | class unary_function_archetype { |
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366 | private: |
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367 | unary_function_archetype() { } |
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368 | public: |
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369 | unary_function_archetype(detail::dummy_constructor) { } |
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370 | const Return& operator()(const Arg&) const { |
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371 | return static_object<Return>::get(); |
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372 | } |
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373 | }; |
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374 | |
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375 | template <class Arg1, class Arg2, class Return> |
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376 | class binary_function_archetype { |
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377 | private: |
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378 | binary_function_archetype() { } |
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379 | public: |
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380 | binary_function_archetype(detail::dummy_constructor) { } |
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381 | const Return& operator()(const Arg1&, const Arg2&) const { |
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382 | return static_object<Return>::get(); |
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383 | } |
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384 | }; |
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385 | |
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386 | template <class Arg> |
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387 | class unary_predicate_archetype { |
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388 | typedef boolean_archetype Return; |
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389 | unary_predicate_archetype() { } |
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390 | public: |
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391 | unary_predicate_archetype(detail::dummy_constructor) { } |
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392 | const Return& operator()(const Arg&) const { |
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393 | return static_object<Return>::get(); |
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394 | } |
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395 | }; |
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396 | |
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397 | template <class Arg1, class Arg2, class Base = null_archetype<> > |
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398 | class binary_predicate_archetype { |
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399 | typedef boolean_archetype Return; |
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400 | binary_predicate_archetype() { } |
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401 | public: |
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402 | binary_predicate_archetype(detail::dummy_constructor) { } |
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403 | const Return& operator()(const Arg1&, const Arg2&) const { |
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404 | return static_object<Return>::get(); |
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405 | } |
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406 | }; |
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407 | |
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408 | //=========================================================================== |
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409 | // Iterator Archetype Classes |
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410 | |
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411 | template <class T, int I = 0> |
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412 | class input_iterator_archetype |
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413 | { |
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414 | private: |
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415 | typedef input_iterator_archetype self; |
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416 | public: |
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417 | typedef std::input_iterator_tag iterator_category; |
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418 | typedef T value_type; |
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419 | struct reference { |
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420 | operator const value_type&() const { return static_object<T>::get(); } |
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421 | }; |
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422 | typedef const T* pointer; |
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423 | typedef std::ptrdiff_t difference_type; |
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424 | self& operator=(const self&) { return *this; } |
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425 | bool operator==(const self&) const { return true; } |
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426 | bool operator!=(const self&) const { return true; } |
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427 | reference operator*() const { return reference(); } |
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428 | self& operator++() { return *this; } |
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429 | self operator++(int) { return *this; } |
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430 | }; |
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431 | |
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432 | template <class T> |
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433 | class input_iterator_archetype_no_proxy |
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434 | { |
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435 | private: |
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436 | typedef input_iterator_archetype_no_proxy self; |
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437 | public: |
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438 | typedef std::input_iterator_tag iterator_category; |
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439 | typedef T value_type; |
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440 | typedef const T& reference; |
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441 | typedef const T* pointer; |
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442 | typedef std::ptrdiff_t difference_type; |
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443 | self& operator=(const self&) { return *this; } |
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444 | bool operator==(const self&) const { return true; } |
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445 | bool operator!=(const self&) const { return true; } |
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446 | reference operator*() const { return static_object<T>::get(); } |
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447 | self& operator++() { return *this; } |
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448 | self operator++(int) { return *this; } |
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449 | }; |
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450 | |
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451 | template <class T> |
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452 | struct output_proxy { |
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453 | output_proxy& operator=(const T&) { return *this; } |
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454 | }; |
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455 | |
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456 | template <class T> |
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457 | class output_iterator_archetype |
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458 | { |
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459 | public: |
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460 | typedef output_iterator_archetype self; |
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461 | public: |
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462 | typedef std::output_iterator_tag iterator_category; |
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463 | typedef output_proxy<T> value_type; |
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464 | typedef output_proxy<T> reference; |
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465 | typedef void pointer; |
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466 | typedef void difference_type; |
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467 | output_iterator_archetype(detail::dummy_constructor) { } |
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468 | output_iterator_archetype(const self&) { } |
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469 | self& operator=(const self&) { return *this; } |
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470 | bool operator==(const self&) const { return true; } |
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471 | bool operator!=(const self&) const { return true; } |
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472 | reference operator*() const { return output_proxy<T>(); } |
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473 | self& operator++() { return *this; } |
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474 | self operator++(int) { return *this; } |
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475 | private: |
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476 | output_iterator_archetype() { } |
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477 | }; |
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478 | |
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479 | template <class T> |
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480 | class input_output_iterator_archetype |
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481 | { |
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482 | private: |
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483 | typedef input_output_iterator_archetype self; |
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484 | struct in_out_tag : public std::input_iterator_tag, public std::output_iterator_tag { }; |
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485 | public: |
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486 | typedef in_out_tag iterator_category; |
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487 | typedef T value_type; |
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488 | struct reference { |
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489 | reference& operator=(const T&) { return *this; } |
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490 | operator value_type() { return static_object<T>::get(); } |
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491 | }; |
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492 | typedef const T* pointer; |
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493 | typedef std::ptrdiff_t difference_type; |
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494 | input_output_iterator_archetype() { } |
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495 | self& operator=(const self&) { return *this; } |
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496 | bool operator==(const self&) const { return true; } |
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497 | bool operator!=(const self&) const { return true; } |
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498 | reference operator*() const { return reference(); } |
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499 | self& operator++() { return *this; } |
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500 | self operator++(int) { return *this; } |
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501 | }; |
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502 | |
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503 | template <class T> |
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504 | class forward_iterator_archetype |
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505 | { |
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506 | public: |
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507 | typedef forward_iterator_archetype self; |
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508 | public: |
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509 | typedef std::forward_iterator_tag iterator_category; |
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510 | typedef T value_type; |
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511 | typedef const T& reference; |
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512 | typedef T const* pointer; |
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513 | typedef std::ptrdiff_t difference_type; |
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514 | forward_iterator_archetype() { } |
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515 | self& operator=(const self&) { return *this; } |
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516 | bool operator==(const self&) const { return true; } |
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517 | bool operator!=(const self&) const { return true; } |
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518 | reference operator*() const { return static_object<T>::get(); } |
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519 | self& operator++() { return *this; } |
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520 | self operator++(int) { return *this; } |
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521 | }; |
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522 | |
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523 | template <class T> |
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524 | class mutable_forward_iterator_archetype |
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525 | { |
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526 | public: |
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527 | typedef mutable_forward_iterator_archetype self; |
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528 | public: |
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529 | typedef std::forward_iterator_tag iterator_category; |
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530 | typedef T value_type; |
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531 | typedef T& reference; |
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532 | typedef T* pointer; |
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533 | typedef std::ptrdiff_t difference_type; |
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534 | mutable_forward_iterator_archetype() { } |
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535 | self& operator=(const self&) { return *this; } |
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536 | bool operator==(const self&) const { return true; } |
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537 | bool operator!=(const self&) const { return true; } |
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538 | reference operator*() const { return static_object<T>::get(); } |
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539 | self& operator++() { return *this; } |
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540 | self operator++(int) { return *this; } |
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541 | }; |
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542 | |
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543 | template <class T> |
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544 | class bidirectional_iterator_archetype |
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545 | { |
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546 | public: |
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547 | typedef bidirectional_iterator_archetype self; |
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548 | public: |
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549 | typedef std::bidirectional_iterator_tag iterator_category; |
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550 | typedef T value_type; |
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551 | typedef const T& reference; |
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552 | typedef T* pointer; |
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553 | typedef std::ptrdiff_t difference_type; |
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554 | bidirectional_iterator_archetype() { } |
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555 | self& operator=(const self&) { return *this; } |
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556 | bool operator==(const self&) const { return true; } |
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557 | bool operator!=(const self&) const { return true; } |
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558 | reference operator*() const { return static_object<T>::get(); } |
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559 | self& operator++() { return *this; } |
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560 | self operator++(int) { return *this; } |
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561 | self& operator--() { return *this; } |
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562 | self operator--(int) { return *this; } |
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563 | }; |
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564 | |
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565 | template <class T> |
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566 | class mutable_bidirectional_iterator_archetype |
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567 | { |
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568 | public: |
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569 | typedef mutable_bidirectional_iterator_archetype self; |
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570 | public: |
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571 | typedef std::bidirectional_iterator_tag iterator_category; |
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572 | typedef T value_type; |
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573 | typedef T& reference; |
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574 | typedef T* pointer; |
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575 | typedef std::ptrdiff_t difference_type; |
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576 | mutable_bidirectional_iterator_archetype() { } |
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577 | self& operator=(const self&) { return *this; } |
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578 | bool operator==(const self&) const { return true; } |
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579 | bool operator!=(const self&) const { return true; } |
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580 | reference operator*() const { return static_object<T>::get(); } |
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581 | self& operator++() { return *this; } |
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582 | self operator++(int) { return *this; } |
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583 | self& operator--() { return *this; } |
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584 | self operator--(int) { return *this; } |
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585 | }; |
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586 | |
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587 | template <class T> |
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588 | class random_access_iterator_archetype |
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589 | { |
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590 | public: |
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591 | typedef random_access_iterator_archetype self; |
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592 | public: |
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593 | typedef std::random_access_iterator_tag iterator_category; |
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594 | typedef T value_type; |
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595 | typedef const T& reference; |
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596 | typedef T* pointer; |
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597 | typedef std::ptrdiff_t difference_type; |
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598 | random_access_iterator_archetype() { } |
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599 | self& operator=(const self&) { return *this; } |
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600 | bool operator==(const self&) const { return true; } |
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601 | bool operator!=(const self&) const { return true; } |
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602 | reference operator*() const { return static_object<T>::get(); } |
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603 | self& operator++() { return *this; } |
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604 | self operator++(int) { return *this; } |
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605 | self& operator--() { return *this; } |
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606 | self operator--(int) { return *this; } |
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607 | reference operator[](difference_type) const |
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608 | { return static_object<T>::get(); } |
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609 | self& operator+=(difference_type) { return *this; } |
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610 | self& operator-=(difference_type) { return *this; } |
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611 | difference_type operator-(const self&) const |
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612 | { return difference_type(); } |
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613 | self operator+(difference_type) const { return *this; } |
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614 | self operator-(difference_type) const { return *this; } |
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615 | bool operator<(const self&) const { return true; } |
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616 | bool operator<=(const self&) const { return true; } |
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617 | bool operator>(const self&) const { return true; } |
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618 | bool operator>=(const self&) const { return true; } |
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619 | }; |
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620 | template <class T> |
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621 | random_access_iterator_archetype<T> |
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622 | operator+(typename random_access_iterator_archetype<T>::difference_type, |
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623 | const random_access_iterator_archetype<T>& x) |
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624 | { return x; } |
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625 | |
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626 | |
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627 | template <class T> |
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628 | class mutable_random_access_iterator_archetype |
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629 | { |
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630 | public: |
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631 | typedef mutable_random_access_iterator_archetype self; |
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632 | public: |
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633 | typedef std::random_access_iterator_tag iterator_category; |
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634 | typedef T value_type; |
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635 | typedef T& reference; |
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636 | typedef T* pointer; |
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637 | typedef std::ptrdiff_t difference_type; |
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638 | mutable_random_access_iterator_archetype() { } |
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639 | self& operator=(const self&) { return *this; } |
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640 | bool operator==(const self&) const { return true; } |
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641 | bool operator!=(const self&) const { return true; } |
---|
642 | reference operator*() const { return static_object<T>::get(); } |
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643 | self& operator++() { return *this; } |
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644 | self operator++(int) { return *this; } |
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645 | self& operator--() { return *this; } |
---|
646 | self operator--(int) { return *this; } |
---|
647 | reference operator[](difference_type) const |
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648 | { return static_object<T>::get(); } |
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649 | self& operator+=(difference_type) { return *this; } |
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650 | self& operator-=(difference_type) { return *this; } |
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651 | difference_type operator-(const self&) const |
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652 | { return difference_type(); } |
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653 | self operator+(difference_type) const { return *this; } |
---|
654 | self operator-(difference_type) const { return *this; } |
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655 | bool operator<(const self&) const { return true; } |
---|
656 | bool operator<=(const self&) const { return true; } |
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657 | bool operator>(const self&) const { return true; } |
---|
658 | bool operator>=(const self&) const { return true; } |
---|
659 | }; |
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660 | template <class T> |
---|
661 | mutable_random_access_iterator_archetype<T> |
---|
662 | operator+ |
---|
663 | (typename mutable_random_access_iterator_archetype<T>::difference_type, |
---|
664 | const mutable_random_access_iterator_archetype<T>& x) |
---|
665 | { return x; } |
---|
666 | |
---|
667 | } // namespace boost |
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668 | |
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669 | #endif // BOOST_CONCEPT_ARCHETYPES_H |
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