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;
|
---|
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() { }
|
---|
477 | };
|
---|
478 |
|
---|
479 | template <class T>
|
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480 | class input_output_iterator_archetype
|
---|
481 | {
|
---|
482 | private:
|
---|
483 | typedef input_output_iterator_archetype self;
|
---|
484 | struct in_out_tag : public std::input_iterator_tag, public std::output_iterator_tag { };
|
---|
485 | public:
|
---|
486 | typedef in_out_tag iterator_category;
|
---|
487 | typedef T value_type;
|
---|
488 | struct reference {
|
---|
489 | reference& operator=(const T&) { return *this; }
|
---|
490 | operator value_type() { return static_object<T>::get(); }
|
---|
491 | };
|
---|
492 | typedef const T* pointer;
|
---|
493 | typedef std::ptrdiff_t difference_type;
|
---|
494 | input_output_iterator_archetype() { }
|
---|
495 | self& operator=(const self&) { return *this; }
|
---|
496 | bool operator==(const self&) const { return true; }
|
---|
497 | bool operator!=(const self&) const { return true; }
|
---|
498 | reference operator*() const { return reference(); }
|
---|
499 | self& operator++() { return *this; }
|
---|
500 | self operator++(int) { return *this; }
|
---|
501 | };
|
---|
502 |
|
---|
503 | template <class T>
|
---|
504 | class forward_iterator_archetype
|
---|
505 | {
|
---|
506 | public:
|
---|
507 | typedef forward_iterator_archetype self;
|
---|
508 | public:
|
---|
509 | typedef std::forward_iterator_tag iterator_category;
|
---|
510 | typedef T value_type;
|
---|
511 | typedef const T& reference;
|
---|
512 | typedef T const* pointer;
|
---|
513 | typedef std::ptrdiff_t difference_type;
|
---|
514 | forward_iterator_archetype() { }
|
---|
515 | self& operator=(const self&) { return *this; }
|
---|
516 | bool operator==(const self&) const { return true; }
|
---|
517 | bool operator!=(const self&) const { return true; }
|
---|
518 | reference operator*() const { return static_object<T>::get(); }
|
---|
519 | self& operator++() { return *this; }
|
---|
520 | self operator++(int) { return *this; }
|
---|
521 | };
|
---|
522 |
|
---|
523 | template <class T>
|
---|
524 | class mutable_forward_iterator_archetype
|
---|
525 | {
|
---|
526 | public:
|
---|
527 | typedef mutable_forward_iterator_archetype self;
|
---|
528 | public:
|
---|
529 | typedef std::forward_iterator_tag iterator_category;
|
---|
530 | typedef T value_type;
|
---|
531 | typedef T& reference;
|
---|
532 | typedef T* pointer;
|
---|
533 | typedef std::ptrdiff_t difference_type;
|
---|
534 | mutable_forward_iterator_archetype() { }
|
---|
535 | self& operator=(const self&) { return *this; }
|
---|
536 | bool operator==(const self&) const { return true; }
|
---|
537 | bool operator!=(const self&) const { return true; }
|
---|
538 | reference operator*() const { return static_object<T>::get(); }
|
---|
539 | self& operator++() { return *this; }
|
---|
540 | self operator++(int) { return *this; }
|
---|
541 | };
|
---|
542 |
|
---|
543 | template <class T>
|
---|
544 | class bidirectional_iterator_archetype
|
---|
545 | {
|
---|
546 | public:
|
---|
547 | typedef bidirectional_iterator_archetype self;
|
---|
548 | public:
|
---|
549 | typedef std::bidirectional_iterator_tag iterator_category;
|
---|
550 | typedef T value_type;
|
---|
551 | typedef const T& reference;
|
---|
552 | typedef T* pointer;
|
---|
553 | typedef std::ptrdiff_t difference_type;
|
---|
554 | bidirectional_iterator_archetype() { }
|
---|
555 | self& operator=(const self&) { return *this; }
|
---|
556 | bool operator==(const self&) const { return true; }
|
---|
557 | bool operator!=(const self&) const { return true; }
|
---|
558 | reference operator*() const { return static_object<T>::get(); }
|
---|
559 | self& operator++() { return *this; }
|
---|
560 | self operator++(int) { return *this; }
|
---|
561 | self& operator--() { return *this; }
|
---|
562 | self operator--(int) { return *this; }
|
---|
563 | };
|
---|
564 |
|
---|
565 | template <class T>
|
---|
566 | class mutable_bidirectional_iterator_archetype
|
---|
567 | {
|
---|
568 | public:
|
---|
569 | typedef mutable_bidirectional_iterator_archetype self;
|
---|
570 | public:
|
---|
571 | typedef std::bidirectional_iterator_tag iterator_category;
|
---|
572 | typedef T value_type;
|
---|
573 | typedef T& reference;
|
---|
574 | typedef T* pointer;
|
---|
575 | typedef std::ptrdiff_t difference_type;
|
---|
576 | mutable_bidirectional_iterator_archetype() { }
|
---|
577 | self& operator=(const self&) { return *this; }
|
---|
578 | bool operator==(const self&) const { return true; }
|
---|
579 | bool operator!=(const self&) const { return true; }
|
---|
580 | reference operator*() const { return static_object<T>::get(); }
|
---|
581 | self& operator++() { return *this; }
|
---|
582 | self operator++(int) { return *this; }
|
---|
583 | self& operator--() { return *this; }
|
---|
584 | self operator--(int) { return *this; }
|
---|
585 | };
|
---|
586 |
|
---|
587 | template <class T>
|
---|
588 | class random_access_iterator_archetype
|
---|
589 | {
|
---|
590 | public:
|
---|
591 | typedef random_access_iterator_archetype self;
|
---|
592 | public:
|
---|
593 | typedef std::random_access_iterator_tag iterator_category;
|
---|
594 | typedef T value_type;
|
---|
595 | typedef const T& reference;
|
---|
596 | typedef T* pointer;
|
---|
597 | typedef std::ptrdiff_t difference_type;
|
---|
598 | random_access_iterator_archetype() { }
|
---|
599 | self& operator=(const self&) { return *this; }
|
---|
600 | bool operator==(const self&) const { return true; }
|
---|
601 | bool operator!=(const self&) const { return true; }
|
---|
602 | reference operator*() const { return static_object<T>::get(); }
|
---|
603 | self& operator++() { return *this; }
|
---|
604 | self operator++(int) { return *this; }
|
---|
605 | self& operator--() { return *this; }
|
---|
606 | self operator--(int) { return *this; }
|
---|
607 | reference operator[](difference_type) const
|
---|
608 | { return static_object<T>::get(); }
|
---|
609 | self& operator+=(difference_type) { return *this; }
|
---|
610 | self& operator-=(difference_type) { return *this; }
|
---|
611 | difference_type operator-(const self&) const
|
---|
612 | { return difference_type(); }
|
---|
613 | self operator+(difference_type) const { return *this; }
|
---|
614 | self operator-(difference_type) const { return *this; }
|
---|
615 | bool operator<(const self&) const { return true; }
|
---|
616 | bool operator<=(const self&) const { return true; }
|
---|
617 | bool operator>(const self&) const { return true; }
|
---|
618 | bool operator>=(const self&) const { return true; }
|
---|
619 | };
|
---|
620 | template <class T>
|
---|
621 | random_access_iterator_archetype<T>
|
---|
622 | operator+(typename random_access_iterator_archetype<T>::difference_type,
|
---|
623 | const random_access_iterator_archetype<T>& x)
|
---|
624 | { return x; }
|
---|
625 |
|
---|
626 |
|
---|
627 | template <class T>
|
---|
628 | class mutable_random_access_iterator_archetype
|
---|
629 | {
|
---|
630 | public:
|
---|
631 | typedef mutable_random_access_iterator_archetype self;
|
---|
632 | public:
|
---|
633 | typedef std::random_access_iterator_tag iterator_category;
|
---|
634 | typedef T value_type;
|
---|
635 | typedef T& reference;
|
---|
636 | typedef T* pointer;
|
---|
637 | typedef std::ptrdiff_t difference_type;
|
---|
638 | mutable_random_access_iterator_archetype() { }
|
---|
639 | self& operator=(const self&) { return *this; }
|
---|
640 | bool operator==(const self&) const { return true; }
|
---|
641 | bool operator!=(const self&) const { return true; }
|
---|
642 | reference operator*() const { return static_object<T>::get(); }
|
---|
643 | self& operator++() { return *this; }
|
---|
644 | self operator++(int) { return *this; }
|
---|
645 | self& operator--() { return *this; }
|
---|
646 | self operator--(int) { return *this; }
|
---|
647 | reference operator[](difference_type) const
|
---|
648 | { return static_object<T>::get(); }
|
---|
649 | self& operator+=(difference_type) { return *this; }
|
---|
650 | self& operator-=(difference_type) { return *this; }
|
---|
651 | difference_type operator-(const self&) const
|
---|
652 | { return difference_type(); }
|
---|
653 | self operator+(difference_type) const { return *this; }
|
---|
654 | self operator-(difference_type) const { return *this; }
|
---|
655 | bool operator<(const self&) const { return true; }
|
---|
656 | bool operator<=(const self&) const { return true; }
|
---|
657 | bool operator>(const self&) const { return true; }
|
---|
658 | bool operator>=(const self&) const { return true; }
|
---|
659 | };
|
---|
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
|
---|
668 |
|
---|
669 | #endif // BOOST_CONCEPT_ARCHETYPES_H
|
---|