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1 // Boost.Assign library
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2 //
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3 // Copyright Thorsten Ottosen 2003-2005. Use, modification and
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4 // distribution is subject to the Boost Software License, Version
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5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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6 // http://www.boost.org/LICENSE_1_0.txt)
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7 //
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8 // For more information, see http://www.boost.org/libs/assign/
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9 //
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10
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11
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12 #ifndef BOOST_ASSIGN_PTR_LIST_OF_HPP
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13 #define BOOST_ASSIGN_PTR_LIST_OF_HPP
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14
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15 #if defined(_MSC_VER)
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16 # pragma once
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17 #endif
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18
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19 #include <boost/assign/list_of.hpp>
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20 #include <boost/type_traits/remove_const.hpp>
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21 #include <boost/type_traits/remove_reference.hpp>
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22 #include <boost/type_traits/is_reference.hpp>
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23 #include <boost/static_assert.hpp>
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24 #include <boost/type_traits/detail/yes_no_type.hpp>
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25 #include <boost/type_traits/decay.hpp>
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26 #include <boost/type_traits/is_array.hpp>
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27 #include <boost/mpl/if.hpp>
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28 #include <boost/ptr_container/ptr_vector.hpp>
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29
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30 #include <boost/preprocessor/repetition/enum_binary_params.hpp>
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31 #include <boost/preprocessor/repetition/enum_params.hpp>
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32 #include <boost/preprocessor/iteration/local.hpp>
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33
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34 namespace boost
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35 {
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36
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37 namespace assign_detail
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38 {
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39 /////////////////////////////////////////////////////////////////////////
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40 // Part 1: flexible and efficient interface
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41 /////////////////////////////////////////////////////////////////////////
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42
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43 template< class T >
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44 class generic_ptr_list :
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45 public converter< generic_ptr_list<T>,
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46 BOOST_DEDUCED_TYPENAME boost::ptr_vector<T>::iterator >
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47 {
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48 protected:
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49 typedef boost::ptr_vector<T> impl_type;
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50 typedef std::auto_ptr<impl_type> release_type;
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51 mutable impl_type values_;
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52
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53 public:
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54 typedef BOOST_DEDUCED_TYPENAME impl_type::iterator iterator;
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55 typedef iterator const_iterator;
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56 typedef BOOST_DEDUCED_TYPENAME impl_type::value_type value_type;
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57 typedef BOOST_DEDUCED_TYPENAME impl_type::size_type size_type;
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58 typedef BOOST_DEDUCED_TYPENAME impl_type::difference_type difference_type;
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59 public:
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60 generic_ptr_list() : values_( 32u )
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61 { }
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62
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63 generic_ptr_list( release_type r ) : values_(r)
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64 { }
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65
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66 release_type release()
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67 {
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68 return values_.release();
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69 }
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70
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71 public:
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72 iterator begin() const { return values_.begin(); }
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73 iterator end() const { return values_.end(); }
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74 bool empty() const { return values_.empty(); }
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75 size_type size() const { return values_.size(); }
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76
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77 public:
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78
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79 operator impl_type() const
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80 {
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81 return values_;
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82 }
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83
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84 template< template<class,class,class> class Seq, class U,
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85 class CA, class A >
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86 operator Seq<U,CA,A>() const
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87 {
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88 Seq<U,CA,A> result;
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89 result.transfer( result.end(), values_ );
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90 BOOST_ASSERT( empty() );
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91 return result;
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92 }
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93
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94 template< class PtrContainer >
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95 std::auto_ptr<PtrContainer> convert( const PtrContainer* c ) const
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96 {
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97 std::auto_ptr<PtrContainer> res( new PtrContainer() );
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98 while( !empty() )
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99 res->insert( res->end(),
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100 values_.pop_back().release() );
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101 return res;
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102 }
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103
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104 template< class PtrContainer >
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105 std::auto_ptr<PtrContainer> to_container( const PtrContainer& c ) const
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106 {
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107 return convert( &c );
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108 }
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109
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110 protected:
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111 void push_back( T* r ) { values_.push_back( r ); }
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112
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113 public:
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114 generic_ptr_list& operator()()
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115 {
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116 this->push_back( new T() );
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117 return *this;
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118 }
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119
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120 template< class U >
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121 generic_ptr_list& operator()( const U& u )
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122 {
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123 this->push_back( new T(u) );
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124 return *this;
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125 }
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126
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127
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128 #ifndef BOOST_ASSIGN_MAX_PARAMS // use user's value
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129 #define BOOST_ASSIGN_MAX_PARAMS 5
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130 #endif
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131 #define BOOST_ASSIGN_MAX_PARAMETERS (BOOST_ASSIGN_MAX_PARAMS - 1)
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132 #define BOOST_ASSIGN_PARAMS1(n) BOOST_PP_ENUM_PARAMS(n, class U)
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133 #define BOOST_ASSIGN_PARAMS2(n) BOOST_PP_ENUM_BINARY_PARAMS(n, U, const& u)
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134 #define BOOST_ASSIGN_PARAMS3(n) BOOST_PP_ENUM_PARAMS(n, u)
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135
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136 #define BOOST_PP_LOCAL_LIMITS (1, BOOST_ASSIGN_MAX_PARAMETERS)
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137 #define BOOST_PP_LOCAL_MACRO(n) \
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138 template< class U, BOOST_ASSIGN_PARAMS1(n) > \
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139 generic_ptr_list& operator()(U const& u, BOOST_ASSIGN_PARAMS2(n) ) \
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140 { \
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141 this->push_back( new T(u, BOOST_ASSIGN_PARAMS3(n))); \
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142 return *this; \
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143 } \
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144 /**/
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145
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146 #include BOOST_PP_LOCAL_ITERATE()
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147
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148 }; // class 'generic_ptr_list'
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149
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150 } // namespace 'assign_detail'
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151
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152 namespace assign
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153 {
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154 template< class T >
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155 inline assign_detail::generic_ptr_list<T>
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156 ptr_list_of()
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157 {
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158 return assign_detail::generic_ptr_list<T>()();
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159 }
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160
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161 template< class T, class U >
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162 inline assign_detail::generic_ptr_list<T>
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163 ptr_list_of( const U& t )
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164 {
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165 return assign_detail::generic_ptr_list<T>()( t );
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166 }
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167
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168
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169 #define BOOST_PP_LOCAL_LIMITS (1, BOOST_ASSIGN_MAX_PARAMETERS)
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170 #define BOOST_PP_LOCAL_MACRO(n) \
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171 template< class T, class U, BOOST_ASSIGN_PARAMS1(n) > \
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172 inline assign_detail::generic_ptr_list<T> \
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173 ptr_list_of(U const& u, BOOST_ASSIGN_PARAMS2(n) ) \
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174 { \
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175 return assign_detail::generic_ptr_list<T>()(u, BOOST_ASSIGN_PARAMS3(n)); \
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176 } \
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177 /**/
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178
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179 #include BOOST_PP_LOCAL_ITERATE()
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180
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181
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182 } // namespace 'assign'
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183 } // namespace 'boost'
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184
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185
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186 #undef BOOST_ASSIGN_PARAMS1
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187 #undef BOOST_ASSIGN_PARAMS2
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188 #undef BOOST_ASSIGN_PARAMS3
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189 #undef BOOST_ASSIGN_MAX_PARAMETERS
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190
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191 #endif
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