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2 // (C) Copyright Edward Diener 2011,2012,2013
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3 // Use, modification and distribution are subject to the Boost Software License,
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4 // Version 1.0. (See 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 #if !defined(BOOST_TTI_DETAIL_TEMPLATE_PARAMS_HPP)
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8 #define BOOST_TTI_DETAIL_TEMPLATE_PARAMS_HPP
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9
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10 #include <boost/config.hpp>
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11 #include <boost/mpl/bool.hpp>
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12 #include <boost/mpl/has_xxx.hpp>
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13 #include <boost/preprocessor/arithmetic/add.hpp>
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14 #include <boost/preprocessor/arithmetic/sub.hpp>
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15 #include <boost/preprocessor/array/elem.hpp>
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16 #include <boost/preprocessor/cat.hpp>
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17 #include <boost/preprocessor/punctuation/comma_if.hpp>
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18 #include <boost/preprocessor/repetition/repeat.hpp>
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19 #include <boost/preprocessor/repetition/enum.hpp>
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20 #include <boost/preprocessor/array/enum.hpp>
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21 #include <boost/preprocessor/array/size.hpp>
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22
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23 #if !defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE)
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24
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25 #define BOOST_TTI_DETAIL_TEMPLATE_PARAMETERS(z,n,args) \
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26 BOOST_PP_ARRAY_ELEM(BOOST_PP_ADD(4,n),args) \
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27 /**/
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28
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29 #define BOOST_TTI_DETAIL_HAS_MEMBER_IMPLEMENTATION(args,introspect_macro) \
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30 template \
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31 < \
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32 typename BOOST_TTI_DETAIL_TP_T, \
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33 typename BOOST_TTI_DETAIL_TP_FALLBACK_ \
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34 = boost::mpl::bool_< BOOST_PP_ARRAY_ELEM(3, args) > \
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35 > \
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36 class BOOST_PP_ARRAY_ELEM(0, args) \
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37 { \
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38 introspect_macro(args) \
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39 public: \
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40 static const bool value \
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41 = BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args)< BOOST_TTI_DETAIL_TP_T >::value; \
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42 typedef typename BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) \
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43 < \
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44 BOOST_TTI_DETAIL_TP_T \
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45 >::type type; \
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46 }; \
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47 /**/
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48
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49 #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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50
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51 #define BOOST_TTI_DETAIL_HAS_MEMBER_MULTI_SUBSTITUTE(z,n,args) \
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52 template \
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53 < \
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54 template \
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55 < \
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56 BOOST_PP_ENUM_ ## z \
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57 ( \
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58 BOOST_PP_SUB \
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59 ( \
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60 BOOST_PP_ARRAY_SIZE(args), \
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61 4 \
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62 ), \
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63 BOOST_TTI_DETAIL_TEMPLATE_PARAMETERS, \
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64 args \
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65 ) \
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66 > \
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67 class BOOST_TTI_DETAIL_TM_V \
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68 > \
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69 struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME(args, n) \
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70 { \
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71 }; \
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72 /**/
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73
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74 #define BOOST_TTI_DETAIL_HAS_MEMBER_SUBSTITUTE(args) \
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75 BOOST_PP_REPEAT \
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76 ( \
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77 BOOST_PP_ARRAY_ELEM(2, args), \
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78 BOOST_TTI_DETAIL_HAS_MEMBER_MULTI_SUBSTITUTE, \
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79 args \
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80 ) \
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81 /**/
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82
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83 #define BOOST_TTI_DETAIL_HAS_MEMBER_INTROSPECT(args) \
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84 template< typename U > \
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85 struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) \
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86 { \
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87 BOOST_TTI_DETAIL_HAS_MEMBER_SUBSTITUTE(args) \
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88 BOOST_MPL_HAS_MEMBER_REJECT(args, BOOST_PP_NIL) \
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89 BOOST_MPL_HAS_MEMBER_ACCEPT(args, BOOST_PP_NIL) \
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90 BOOST_STATIC_CONSTANT \
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91 ( \
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92 bool, value = BOOST_MPL_HAS_MEMBER_TEST(args) \
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93 ); \
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94 typedef boost::mpl::bool_< value > type; \
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95 }; \
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96 /**/
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97
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98 #define BOOST_TTI_DETAIL_HAS_MEMBER_WITH_FUNCTION_SFINAE(args) \
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99 BOOST_TTI_DETAIL_HAS_MEMBER_IMPLEMENTATION \
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100 ( \
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101 args, \
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102 BOOST_TTI_DETAIL_HAS_MEMBER_INTROSPECT \
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103 ) \
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104 /**/
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105
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106 #else // !!BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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107
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108 #define BOOST_TTI_DETAIL_HAS_MEMBER_MULTI_SUBSTITUTE_WITH_TEMPLATE_SFINAE(z,n,args) \
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109 template \
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110 < \
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111 template \
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112 < \
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113 BOOST_PP_ENUM_ ## z \
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114 ( \
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115 BOOST_PP_SUB \
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116 ( \
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117 BOOST_PP_ARRAY_SIZE(args), \
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118 4 \
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119 ), \
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120 BOOST_TTI_DETAIL_TEMPLATE_PARAMETERS, \
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121 args \
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122 ) \
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123 > \
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124 class BOOST_TTI_DETAIL_TM_U \
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125 > \
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126 struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_NAME_WITH_TEMPLATE_SFINAE \
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127 ( \
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128 args, \
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129 n \
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130 ) \
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131 { \
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132 typedef \
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133 BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME(args) \
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134 type; \
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135 }; \
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136 /**/
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137
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138 #define BOOST_TTI_DETAIL_HAS_MEMBER_SUBSTITUTE_WITH_TEMPLATE_SFINAE(args) \
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139 typedef void \
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140 BOOST_MPL_HAS_MEMBER_INTROSPECTION_SUBSTITUTE_TAG_NAME(args); \
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141 BOOST_PP_REPEAT \
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142 ( \
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143 BOOST_PP_ARRAY_ELEM(2, args), \
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144 BOOST_TTI_DETAIL_HAS_MEMBER_MULTI_SUBSTITUTE_WITH_TEMPLATE_SFINAE, \
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145 args \
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146 ) \
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147 /**/
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148
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149 #define BOOST_TTI_DETAIL_HAS_MEMBER_INTROSPECT_WITH_TEMPLATE_SFINAE(args) \
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150 BOOST_MPL_HAS_MEMBER_REJECT_WITH_TEMPLATE_SFINAE(args,BOOST_PP_NIL) \
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151 BOOST_MPL_HAS_MEMBER_ACCEPT_WITH_TEMPLATE_SFINAE(args,BOOST_PP_NIL) \
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152 template< typename BOOST_TTI_DETAIL_TP_U > \
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153 struct BOOST_MPL_HAS_MEMBER_INTROSPECTION_NAME(args) \
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154 : BOOST_MPL_HAS_MEMBER_INTROSPECTION_TEST_NAME(args)< BOOST_TTI_DETAIL_TP_U > { \
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155 }; \
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156 /**/
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157
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158 #define BOOST_TTI_DETAIL_HAS_MEMBER_WITH_TEMPLATE_SFINAE(args) \
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159 BOOST_TTI_DETAIL_HAS_MEMBER_SUBSTITUTE_WITH_TEMPLATE_SFINAE \
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160 ( \
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161 args \
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162 ) \
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163 BOOST_TTI_DETAIL_HAS_MEMBER_IMPLEMENTATION \
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164 ( \
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165 args, \
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166 BOOST_TTI_DETAIL_HAS_MEMBER_INTROSPECT_WITH_TEMPLATE_SFINAE \
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167 ) \
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168 /**/
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169
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170 #endif // !BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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171
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172 #else // defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE)
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173
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174 #define BOOST_TTI_DETAIL_SAME(trait,name) \
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175 BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF \
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176 ( \
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177 trait, \
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178 name, \
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179 false \
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180 ) \
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181 /**/
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182
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183 #define BOOST_TTI_DETAIL_TRAIT_CALL_HAS_TEMPLATE_CHECK_PARAMS(trait,name,tp) \
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184 BOOST_TTI_DETAIL_SAME(trait,name) \
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185 /**/
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186
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187 #endif // !BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE
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188
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189 #define BOOST_TTI_DETAIL_TRAIT_HAS_TEMPLATE_CHECK_PARAMS(trait,name,tpArray) \
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190 BOOST_TTI_DETAIL_TRAIT_CALL_HAS_TEMPLATE_CHECK_PARAMS(BOOST_PP_CAT(trait,_detail),name,tpArray) \
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191 template<class BOOST_TTI_DETAIL_TP_T> \
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192 struct trait : \
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193 BOOST_PP_CAT(trait,_detail)<BOOST_TTI_DETAIL_TP_T> \
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194 { \
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195 }; \
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196 /**/
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197
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198 #if !defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE)
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199 #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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200
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201 #define BOOST_TTI_DETAIL_TRAIT_CALL_HAS_TEMPLATE_CHECK_PARAMS(trait,name,tpArray) \
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202 BOOST_TTI_DETAIL_HAS_MEMBER_WITH_FUNCTION_SFINAE \
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203 ( \
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204 ( BOOST_PP_ADD(BOOST_PP_ARRAY_SIZE(tpArray),4), ( trait, name, 1, false, BOOST_PP_ARRAY_ENUM(tpArray) ) ) \
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205 ) \
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206 /**/
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207
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208 #else // BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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209
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210 #define BOOST_TTI_DETAIL_TRAIT_CALL_HAS_TEMPLATE_CHECK_PARAMS(trait,name,tpArray) \
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211 BOOST_TTI_DETAIL_HAS_MEMBER_WITH_TEMPLATE_SFINAE \
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212 ( \
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213 ( BOOST_PP_ADD(BOOST_PP_ARRAY_SIZE(tpArray),4), ( trait, name, 1, false, BOOST_PP_ARRAY_ENUM(tpArray) ) ) \
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214 ) \
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215 /**/
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216
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217 #endif // !BOOST_WORKAROUND(BOOST_MSVC, <= 1400)
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218 #endif // !defined(BOOST_MPL_CFG_NO_HAS_XXX_TEMPLATE)
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219
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220 #endif // BOOST_TTI_DETAIL_TEMPLATE_PARAMS_HPP
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