1 | //-----------------------------------------------------------------------------
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2 | // boost-libs variant/test/rvalue_test.cpp source file
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3 | // See http://www.boost.org for updates, documentation, and revision history.
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4 | //-----------------------------------------------------------------------------
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5 | //
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6 | // Copyright (c) 2012
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7 | // Antony Polukhin
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8 | //
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9 | // Distributed under the Boost Software License, Version 1.0. (See
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10 | // accompanying file LICENSE_1_0.txt or copy at
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11 | // http://www.boost.org/LICENSE_1_0.txt)
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12 |
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13 | #include "boost/config.hpp"
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14 |
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15 | #include "boost/test/minimal.hpp"
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16 | #include "boost/variant.hpp"
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17 |
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18 | // This test requires rvalue references support
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19 |
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20 | #ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
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21 |
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22 | void run()
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23 | {
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24 | BOOST_CHECK(true);
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25 | }
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26 |
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27 | void run1()
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28 | {
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29 | BOOST_CHECK(true);
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30 | }
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31 |
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32 | void run_move_only()
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33 | {
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34 | BOOST_CHECK(true);
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35 | }
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36 |
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37 | #else
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38 |
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39 | class move_copy_conting_class {
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40 | public:
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41 | static unsigned int moves_count;
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42 | static unsigned int copy_count;
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43 |
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44 | move_copy_conting_class(){}
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45 | move_copy_conting_class(move_copy_conting_class&&) {
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46 | ++ moves_count;
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47 | }
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48 |
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49 | move_copy_conting_class& operator=(move_copy_conting_class&&) {
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50 | ++ moves_count;
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51 | return *this;
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52 | }
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53 |
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54 | move_copy_conting_class(const move_copy_conting_class&) {
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55 | ++ copy_count;
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56 | }
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57 | move_copy_conting_class& operator=(const move_copy_conting_class&) {
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58 | ++ copy_count;
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59 | return *this;
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60 | }
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61 | };
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62 |
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63 | unsigned int move_copy_conting_class::moves_count = 0;
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64 | unsigned int move_copy_conting_class::copy_count = 0;
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65 |
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66 | void run()
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67 | {
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68 | typedef boost::variant<int, move_copy_conting_class> variant_I_type;
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69 | variant_I_type v1, v2;
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70 |
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71 | // Assuring that `move_copy_conting_class` was not created
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72 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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73 | BOOST_CHECK(move_copy_conting_class::moves_count == 0);
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74 |
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75 | v1 = move_copy_conting_class();
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76 | // Assuring that `move_copy_conting_class` was moved at least once
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77 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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78 |
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79 | unsigned int total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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80 | move_copy_conting_class var;
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81 | v1 = 0;
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82 | move_copy_conting_class::moves_count = 0;
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83 | move_copy_conting_class::copy_count = 0;
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84 | v1 = var;
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85 | // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
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86 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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87 |
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88 | move_copy_conting_class::moves_count = 0;
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89 | move_copy_conting_class::copy_count = 0;
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90 | v2 = static_cast<variant_I_type&&>(v1);
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91 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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92 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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93 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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94 |
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95 | v1 = move_copy_conting_class();
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96 | move_copy_conting_class::moves_count = 0;
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97 | move_copy_conting_class::copy_count = 0;
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98 | v2 = static_cast<variant_I_type&&>(v1);
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99 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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100 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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101 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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102 | total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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103 | move_copy_conting_class::moves_count = 0;
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104 | move_copy_conting_class::copy_count = 0;
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105 | v1 = v2;
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106 | // Assuring that move assignment operator moves/copyes value not more times than copy assignment operator
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107 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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108 |
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109 |
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110 | typedef boost::variant<move_copy_conting_class, int> variant_II_type;
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111 | variant_II_type v3;
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112 | move_copy_conting_class::moves_count = 0;
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113 | move_copy_conting_class::copy_count = 0;
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114 | v1 = static_cast<variant_II_type&&>(v3);
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115 | // Assuring that `move_copy_conting_class` in v3 was moved at least once (v1 and v3 have different types)
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116 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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117 |
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118 | move_copy_conting_class::moves_count = 0;
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119 | move_copy_conting_class::copy_count = 0;
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120 | v2 = static_cast<variant_I_type&&>(v1);
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121 | // Assuring that `move_copy_conting_class` in v1 was moved at least once (v1 and v3 have different types)
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122 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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123 |
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124 | move_copy_conting_class::moves_count = 0;
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125 | move_copy_conting_class::copy_count = 0;
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126 | variant_I_type v5(static_cast<variant_I_type&&>(v1));
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127 | // Assuring that `move_copy_conting_class` in v1 was moved at least once and was not copied
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128 | BOOST_CHECK(move_copy_conting_class::moves_count != 0);
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129 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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130 |
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131 | total_count = move_copy_conting_class::moves_count + move_copy_conting_class::copy_count;
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132 | move_copy_conting_class::moves_count = 0;
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133 | move_copy_conting_class::copy_count = 0;
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134 | variant_I_type v6(v1);
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135 | // Assuring that move constructor moves/copyes value not more times than copy constructor
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136 | BOOST_CHECK(total_count <= move_copy_conting_class::moves_count + move_copy_conting_class::copy_count);
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137 | }
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138 |
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139 | void run1()
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140 | {
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141 | move_copy_conting_class::moves_count = 0;
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142 | move_copy_conting_class::copy_count = 0;
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143 |
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144 | move_copy_conting_class c1;
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145 | typedef boost::variant<int, move_copy_conting_class> variant_I_type;
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146 | variant_I_type v1(static_cast<move_copy_conting_class&&>(c1));
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147 |
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148 | // Assuring that `move_copy_conting_class` was not copyied
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149 | BOOST_CHECK(move_copy_conting_class::copy_count == 0);
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150 | BOOST_CHECK(move_copy_conting_class::moves_count > 0);
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151 | }
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152 |
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153 | struct move_only_structure {
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154 | move_only_structure(){}
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155 | move_only_structure(move_only_structure&&){}
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156 | move_only_structure& operator=(move_only_structure&&) { return *this; }
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157 |
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158 | private:
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159 | move_only_structure(const move_only_structure&);
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160 | move_only_structure& operator=(const move_only_structure&);
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161 | };
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162 |
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163 | void run_move_only()
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164 | {
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165 | move_only_structure mo;
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166 | boost::variant<int, move_only_structure > vi, vi2(static_cast<move_only_structure&&>(mo));
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167 | BOOST_CHECK(vi.which() == 0);
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168 | BOOST_CHECK(vi2.which() == 1);
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169 |
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170 | vi = 10;
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171 | vi2 = 10;
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172 | BOOST_CHECK(vi.which() == 0);
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173 | BOOST_CHECK(vi2.which() == 0);
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174 |
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175 | vi = static_cast<move_only_structure&&>(mo);
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176 | vi2 = static_cast<move_only_structure&&>(mo);
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177 | BOOST_CHECK(vi.which() == 1);
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178 | }
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179 |
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180 | #endif
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181 |
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182 |
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183 | int test_main(int , char* [])
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184 | {
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185 | run();
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186 | run1();
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187 | run_move_only();
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188 | return 0;
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189 | }
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